panic: ASan: Invalid access, 8-byte read in __mtx_lock_flags

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syzbot

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Jul 9, 2021, 8:01:22 PM7/9/21

to syzkaller-f...@googlegroups.com

Hello,

syzbot found the following issue on:

HEAD commit: a65fe39d UPDATING: fix typo
git tree: https://github.com/freebsd/freebsd-src.git main
console output: https://syzkaller.appspot.com/x/log.txt?x=10ca45d8300000
dashboard link: https://syzkaller.appspot.com/bug?extid=d9a004cd64d2b3cff518

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d9a004...@syzkaller.appspotmail.com

panic: ASan: Invalid access, 8-byte read at 0xfffffe009b6fc480, UMAUseAfterFree(fd)
cpuid = 1
time = 1625867399
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc7/frame 0xfffffe008f766130
kdb_backtrace() at kdb_backtrace+0xd3/frame 0xfffffe008f766290
vpanic() at vpanic+0x2c5/frame 0xfffffe008f766370
panic() at panic+0xb5/frame 0xfffffe008f766430
__asan_load8_noabort() at __asan_load8_noabort+0x36f/frame 0xfffffe008f7664f0
__mtx_lock_flags() at __mtx_lock_flags+0x122/frame 0xfffffe008f7665e0
sctp_endpoint_probe() at sctp_endpoint_probe+0xce/frame 0xfffffe008f766650
sctp_inpcb_bind() at sctp_inpcb_bind+0x99a/frame 0xfffffe008f766790
sctp6_bind() at sctp6_bind+0x171/frame 0xfffffe008f766880
sobind() at sobind+0xd5/frame 0xfffffe008f7668d0
kern_bindat() at kern_bindat+0x25e/frame 0xfffffe008f7669b0
sys_bind() at sys_bind+0xfb/frame 0xfffffe008f7669f0
amd64_syscall() at amd64_syscall+0x425/frame 0xfffffe008f766bf0
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe008f766bf0
--- syscall (198, FreeBSD ELF64, nosys), rip = 0x287eda, rsp = 0x7fffdfffdf08, rbp = 0x7fffdfffdf70 ---
KDB: enter: panic
[ thread pid 5557 tid 107641 ]
Stopped at kdb_enter+0x6b: movq $0,0x28f9d2a(%rip)
db>
db> set $lines = 0
db> set $maxwidth = 0
db> show registers
cs 0x20
ds 0x3b
es 0x3b
fs 0x13
gs 0x1b
ss 0x28
rax 0x12
rcx 0x93251e089c00afaf
rdx 0x40001
rbx 0
rsp 0xfffffe008f766270
rbp 0xfffffe008f766290
rsi 0
rdi 0xfffffe009251dfa8
r8 0x3
r9 0xfffffe008f765dc8
r10 0
r11 0xfffffe009ae2ac50
r12 0xfffffe009ae2a740
r13 0xfffffe008f766201
r14 0xffffffff82c416a0 .str.18
r15 0xffffffff82c416a0 .str.18
rip 0xffffffff8178ed0b kdb_enter+0x6b
rflags 0x46
kdb_enter+0x6b: movq $0,0x28f9d2a(%rip)
db> show proc
Process 5557 (syz-executor.0) at 0xfffffe009b09b000:
state: NORMAL
uid: 0 gids: 0, 0, 5
parent: pid 782 at 0xfffffe005877b000
ABI: FreeBSD ELF64
flag: 0x10000080 flag2: 0
arguments: /root/syz-executor.0
reaper: 0xfffffe0053d51538 reapsubtree: 1
sigparent: 20
vmspace: 0xfffffe009b1623e0
(map 0xfffffe009b1623e0)
(map.pmap 0xfffffe009b1624a0)
(pmap 0xfffffe009b162500)
threads: 2
105667 RunQ syz-executor.0
107641 Run CPU 1 syz-executor.0
db> ps
pid ppid pgrp uid state wmesg wchan cmd
5557 782 782 0 R (threaded) syz-executor.0
105667 RunQ syz-executor.0
107641 Run CPU 1 syz-executor.0
5556 783 783 0 R syz-executor.1
5031 1 783 0 S uwait 0xfffffe00925af200 syz-executor.1
5030 1 783 0 S uwait 0xfffffe009ab12500 syz-executor.1
5026 1 783 0 S uwait 0xfffffe009bf6bd00 syz-executor.1
5025 1 783 0 S uwait 0xfffffe0092516780 syz-executor.1
5022 1 783 0 S uwait 0xfffffe009ab12c00 syz-executor.1
5021 1 783 0 S uwait 0xfffffe0058783600 syz-executor.1
5017 1 783 0 S uwait 0xfffffe008fa87780 syz-executor.1
5016 1 783 0 S uwait 0xfffffe00925e9280 syz-executor.1
5014 1 783 0 S uwait 0xfffffe009ab12b00 syz-executor.1
5013 1 783 0 S uwait 0xfffffe009a823d00 syz-executor.1
5011 1 783 0 S uwait 0xfffffe009ab13e80 syz-executor.1
5010 1 783 0 S uwait 0xfffffe00573da700 syz-executor.1
5008 1 783 0 S uwait 0xfffffe0092592d80 syz-executor.1
5001 1 783 0 S uwait 0xfffffe0092592c80 syz-executor.1
5000 1 783 0 S uwait 0xfffffe009ab12400 syz-executor.1
4999 1 783 0 S uwait 0xfffffe009a823f00 syz-executor.1
4358 1 794 0 S uwait 0xfffffe009a823c00 syz-executor.2
4357 1 782 0 S uwait 0xfffffe00925af580 syz-executor.0
4350 1 782 0 S uwait 0xfffffe0092516d00 syz-executor.0
4348 1 794 0 S uwait 0xfffffe00925e9780 syz-executor.2
4346 1 802 0 S uwait 0xfffffe00925e9180 syz-executor.3
4343 1 802 0 S uwait 0xfffffe00925e9580 syz-executor.3
4340 1 782 0 S uwait 0xfffffe00925e9a80 syz-executor.0
4339 1 794 0 S uwait 0xfffffe009203c200 syz-executor.2
4334 1 802 0 S uwait 0xfffffe0058783700 syz-executor.3
4329 1 782 0 S uwait 0xfffffe00925e9c80 syz-executor.0
4326 1 782 0 S uwait 0xfffffe00925e9380 syz-executor.0
3533 0 0 0 DL aiordy 0xfffffe009b640000 [aiod4]
3532 0 0 0 DL aiordy 0xfffffe008f889538 [aiod3]
3531 0 0 0 DL aiordy 0xfffffe009ab14538 [aiod2]
3530 0 0 0 DL aiordy 0xfffffe0091f89a70 [aiod1]
3030 1 782 0 S uwait 0xfffffe00925e9e80 syz-executor.0
3023 1 782 0 S uwait 0xfffffe00573da300 syz-executor.0
3014 1 782 0 S uwait 0xfffffe00925e9480 syz-executor.0
3010 1 782 0 S uwait 0xfffffe00925e9680 syz-executor.0
3009 1 782 0 S uwait 0xfffffe00587d8580 syz-executor.0
1992 1 1992 65 Ss select 0xfffffe009a823440 dhclient
1897 1 1897 0 Ss select 0xfffffe009a823740 dhclient
1894 1 1894 0 Ss select 0xfffffe009a8237c0 dhclient
1875 1 1875 65 Ss select 0xfffffe00925af4c0 dhclient
1639 1 1639 0 Ss select 0xfffffe0092516740 dhclient
1636 1 1636 0 Ss select 0xfffffe0092516940 dhclient
1617 1 1617 65 Ss select 0xfffffe00925af140 dhclient
1468 1 1468 0 Ss select 0xfffffe00925af0c0 dhclient
1465 1 1465 0 Ss select 0xfffffe009ab12340 dhclient
1440 1 1440 65 Ss select 0xfffffe0092516b40 dhclient
1210 1 1210 0 Ss select 0xfffffe00925af040 dhclient
1201 1 1201 0 Ss select 0xfffffe009ab12ec0 dhclient
802 780 802 0 Ss piperd 0xfffffe009257fba0 syz-executor.3
794 780 794 0 Rs syz-executor.2
783 780 783 0 Ss nanslp 0xffffffff84055901 syz-executor.1
782 780 782 0 Ss nanslp 0xffffffff84055901 syz-executor.0
780 778 778 0 R (threaded) syz-fuzzer
100092 S uwait 0xfffffe00573da500 syz-fuzzer
100120 S uwait 0xfffffe0092516f00 syz-fuzzer
100121 S uwait 0xfffffe00587d8080 syz-fuzzer
100122 S uwait 0xfffffe00587d8180 syz-fuzzer
100123 S uwait 0xfffffe00587d8280 syz-fuzzer
100124 S uwait 0xfffffe009203ca80 syz-fuzzer
100125 S uwait 0xfffffe009203cb80 syz-fuzzer
100126 RunQ syz-fuzzer
100608 S uwait 0xfffffe00925e9880 syz-fuzzer
778 776 778 0 Ss pause 0xfffffe009200db20 csh
776 694 776 0 Ss select 0xfffffe009203c840 sshd
760 1 760 0 Ss+ ttyin 0xfffffe0056fe0cb0 getty
759 1 759 0 Ss+ ttyin 0xfffffe00583e90b0 getty
758 1 758 0 Ss+ ttyin 0xfffffe00583e94b0 getty
757 1 757 0 Ss+ ttyin 0xfffffe00583e98b0 getty
756 1 756 0 Ss+ ttyin 0xfffffe00583e9cb0 getty
755 1 755 0 Ss+ ttyin 0xfffffe00583910b0 getty
754 1 754 0 Ss+ ttyin 0xfffffe00583914b0 getty
753 1 753 0 Ss+ ttyin 0xfffffe00583918b0 getty
752 1 752 0 Ss+ ttyin 0xfffffe0058391cb0 getty
698 1 698 0 Ss nanslp 0xffffffff84055901 cron
694 1 694 0 Ss select 0xfffffe008fa87940 sshd
507 1 507 0 Ss select 0xfffffe008fa87cc0 syslogd
436 1 436 0 Ss select 0xfffffe008fa87ac0 devd
435 1 435 65 Ss select 0xfffffe00587d8740 dhclient
350 1 350 0 Ss select 0xfffffe008fa879c0 dhclient
347 1 347 0 Ss select 0xfffffe008fa87d40 dhclient
23 0 0 0 DL syncer 0xffffffff8417ba40 [syncer]
22 0 0 0 DL vlruwt 0xfffffe005877ba70 [vnlru]
21 0 0 0 DL (threaded) [bufdaemon]
100083 D qsleep 0xffffffff84179940 [bufdaemon]
100084 D - 0xffffffff83411f80 [bufspacedaemon-0]
100096 D sdflush 0xfffffe008f8b3ce8 [/ worker]
20 0 0 0 DL psleep 0xffffffff841b1c80 [vmdaemon]
19 0 0 0 DL (threaded) [pagedaemon]
100081 D psleep 0xffffffff841a57b8 [dom0]
100085 D launds 0xffffffff841a57c4 [laundry: dom0]
100086 D umarcl 0xffffffff81e7e510 [uma]
18 0 0 0 DL - 0xffffffff83e0caa0 [rand_harvestq]
17 0 0 0 DL waiting 0xffffffff84bdb3c0 [sctp_iterator]
16 0 0 0 DL pftm 0xffffffff848d8d30 [pf purge]
15 0 0 0 DL - 0xffffffff84174dc0 [soaiod4]
9 0 0 0 DL - 0xffffffff84174dc0 [soaiod3]
8 0 0 0 DL - 0xffffffff84174dc0 [soaiod2]
7 0 0 0 DL - 0xffffffff84174dc0 [soaiod1]
6 0 0 0 DL (threaded) [cam]
100046 D - 0xffffffff83c92240 [doneq0]
100047 D - 0xffffffff83c921c0 [async]
100080 D - 0xffffffff83c92040 [scanner]
14 0 0 0 DL seqstat 0xfffffe0056aadc88 [sequencer 00]
5 0 0 0 DL crypto_ 0xfffffe00541abd80 [crypto returns 1]
4 0 0 0 DL crypto_ 0xfffffe00541abd30 [crypto returns 0]
3 0 0 0 DL crypto_ 0xffffffff8419f860 [crypto]
13 0 0 0 DL (threaded) [geom]
100037 D - 0xffffffff84028ec0 [g_event]
100038 D - 0xffffffff84028f00 [g_up]
100039 D - 0xffffffff84028f40 [g_down]
2 0 0 0 DL (threaded) [KTLS]
100028 D - 0xfffffe0053e16e00 [thr_0]
100029 D - 0xfffffe0053e16e80 [thr_1]
12 0 0 0 WL (threaded) [intr]
100010 I [swi6: task queue]
100011 I [swi6: Giant taskq]
100014 I [swi5: fast taskq]
100030 I [swi1: netisr 0]
100031 I [swi3: vm]
100032 I [swi4: clock (0)]
100033 I [swi4: clock (1)]
100034 I [swi1: hpts]
100035 I [swi1: hpts]
100048 I [irq24: virtio_pci0]
100049 I [irq25: virtio_pci0]
100050 I [irq26: virtio_pci0]
100051 I [irq27: virtio_pci0]
100052 I [irq28: virtio_pci1]
100053 I [irq29: virtio_pci1]
100054 I [irq30: virtio_pci1]
100055 I [irq31: virtio_pci1]
100056 I [irq32: virtio_pci1]
100061 I [irq10: virtio_pci2]
100063 I [irq1: atkbd0]
100064 I [irq12: psm0]
100065 I [swi0: uart uart++]
100073 I [swi1: pf send]
11 0 0 0 RL (threaded) [idle]
100003 CanRun [idle: cpu0]
100004 CanRun [idle: cpu1]
1 0 1 0 SLs wait 0xfffffe0053d51538 [init]
10 0 0 0 DL audit_w 0xffffffff841a0800 [audit]
0 0 0 0 RLs (threaded) [kernel]
100000 D swapin 0xffffffff84029dc0 [swapper]
100005 D - 0xfffffe0053c0d800 [softirq_0]
100006 D - 0xfffffe0053c0d600 [softirq_1]
100007 D - 0xfffffe0053c0d400 [if_io_tqg_0]
100008 D - 0xfffffe0053c0d200 [if_io_tqg_1]
100009 D - 0xfffffe0053c0d000 [if_config_tqg_0]
100012 Run CPU 0 [thread taskq]
100013 D - 0xfffffe0007919400 [inm_free taskq]
100015 D - 0xfffffe0007919200 [kqueue_ctx taskq]
100016 D - 0xfffffe0007919100 [linuxkpi_irq_wq]
100017 D - 0xfffffe0007919000 [aiod_kick taskq]
100018 D - 0xfffffe0053df6e00 [in6m_free taskq]
100019 D - 0xfffffe0053df6d00 [pci_hp taskq]
100020 D - 0xfffffe0053df6c00 [linuxkpi_short_wq_0]
100021 D - 0xfffffe0053df6c00 [linuxkpi_short_wq_1]
100022 D - 0xfffffe0053df6c00 [linuxkpi_short_wq_2]
100023 D - 0xfffffe0053df6c00 [linuxkpi_short_wq_3]
100024 D - 0xfffffe0053df6b00 [linuxkpi_long_wq_0]
100025 D - 0xfffffe0053df6b00 [linuxkpi_long_wq_1]
100026 D - 0xfffffe0053df6b00 [linuxkpi_long_wq_2]
100027 D - 0xfffffe0053df6b00 [linuxkpi_long_wq_3]
100036 D - 0xfffffe0053df6a00 [firmware taskq]
100040 D - 0xfffffe0053df6900 [crypto_0]
100041 D - 0xfffffe0053df6900 [crypto_1]
100057 D - 0xfffffe0053df6700 [vtnet0 rxq 0]
100058 D - 0xfffffe0053df6600 [vtnet0 txq 0]
100059 D - 0xfffffe0053df6500 [vtnet0 rxq 1]
100060 D - 0xfffffe0053df6400 [vtnet0 txq 1]
100062 D vtbslp 0xfffffe0056fc0380 [virtio_balloon]
100066 D - 0xfffffe0053df6300 [mca taskq]
100071 D - 0xffffffff82c48621 [deadlkres]
100076 D - 0xfffffe0058390e00 [acpi_task_0]
100077 D - 0xfffffe0058390e00 [acpi_task_1]
100078 D - 0xfffffe0058390e00 [acpi_task_2]
100079 D - 0xfffffe0053df6800 [CAM taskq]
db> show all locks
Process 5557 (syz-executor.0) thread 0xfffffe009ae2a740 (107641)
exclusive rw sctp-info (sctp-info) r = 0 (0xfffffe00081af358) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:2918
Process 0 (kernel) thread 0xfffffe0053df21e0 (100012)
exclusive sleep mutex kernel arena (kernel arena) r = 0 (0xffffffff840aa580) locked @ /syzkaller/managers/main/kernel/sys/kern/subr_vmem.c:789
exclusive sleep mutex vmem list lock (vmem list lock) r = 0 (0xffffffff83409bc0) locked @ /syzkaller/managers/main/kernel/sys/kern/subr_vmem.c:784
db> show malloc
Type InUse MemUse Requests
pf_hash 5 11524K 5
devbuf 4216 4338K 4244
tcp_hpts 6 3201K 6
sysctloid 34320 2027K 34387
vtbuf 24 1968K 46
kobj 326 1304K 486
newblk 6 1026K 11257
vfscache 3 1025K 3
pcb 167 684K 11850
filedesc 78 618K 9073
inodedep 19 519K 5138
ufs_quota 1 512K 1
vfs_hash 1 512K 1
callout 2 512K 2
intr 4 472K 4
subproc 212 432K 5673
vmem 3 274K 6
acpica 1674 184K 54806
vnet_data 1 168K 1
tidhash 3 141K 3
linker 357 140K 397
pagedep 10 131K 4730
tfo_ccache 1 128K 1
DEVFS1 107 107K 124
sem 4 106K 4
BPF 46 88K 60
bus 986 80K 3469
sctp_stro 74 74K 2498
mtx_pool 2 72K 2
syncache 1 68K 1
sctp_atcl 171 65K 8174
acpitask 1 64K 1
ddb_capture 1 64K 1
module 510 64K 510
umtx 440 55K 440
kdtrace 287 54K 13200
temp 35 33K 2917
hostcache 1 32K 1
shm 1 32K 28
DEVFS3 126 32K 136
msg 4 30K 4
gtaskqueue 18 26K 18
kbdmux 6 22K 6
ifaddr 70 20K 72
DEVFS_RULE 56 20K 56
ufs_mount 5 17K 6
proc 3 17K 3
sctp_atky 289 17K 10934
routetbl 132 17K 704
tty 16 16K 16
ithread 99 16K 99
bus-sc 33 14K 1684
lltable 43 14K 195
KTRACE 100 13K 100
ifnet 7 13K 7
ether_multi 152 13K 162
kenv 95 12K 95
eventhandler 133 12K 133
sctp_stri 22 11K 465
CAM queue 5 11K 1528
rman 84 10K 425
GEOM 60 10K 489
in6_multi 65 9K 65
kqueue 99 9K 5627
bmsafemap 2 9K 4973
UART 12 9K 12
devstat 4 9K 4
ksem 1 8K 86
sctp_timw 32 8K 32
rpc 2 8K 2
shmfd 1 8K 1
pfs_vncache 1 8K 1
cred 30 8K 308
pfs_nodes 20 8K 20
audit_evclass 236 8K 294
taskqueue 60 7K 60
sglist 5 7K 5
pwddesc 97 7K 5582
CAM DEV 3 6K 510
plimit 24 6K 658
DEVFSP 80 5K 675
pf_ifnet 12 5K 204
ufs_dirhash 24 5K 24
UMA 270 5K 270
session 35 5K 65
vt 11 5K 11
memdesc 1 4K 1
MCA 32 4K 32
evdev 4 4K 4
kcovinfo 64 4K 68
acpisem 28 4K 28
selfd 55 4K 71597
lockf 32 4K 197
hhook 15 4K 17
fpukern_ctx 3 3K 3
proc-args 52 3K 727
terminal 11 3K 11
sctp_athm 171 3K 8353
dirrem 10 3K 4741
select 19 3K 150
uidinfo 4 3K 18
sctp_map 148 3K 4860
local_apic 1 2K 1
io_apic 1 2K 1
ipsec-saq 2 2K 2
ip6ndp 12 2K 14
sctp_ifa 13 2K 14
Unitno 27 2K 47
CAM XPT 22 2K 543
in_multi 6 2K 8
ipsecpolicy 2 2K 2
acpidev 20 2K 20
msi 9 2K 9
clone 9 2K 9
tun 7 2K 7
freework 5 2K 5794
softdep 1 1K 1
mkdir 8 1K 9026
freefile 8 1K 4644
freeblks 4 1K 4656
sahead 1 1K 1
secasvar 1 1K 1
nhops 6 1K 8
vnodemarker 2 1K 746
NFSD session 1 1K 1
CAM periph 4 1K 271
sctp_ifn 6 1K 14
ipsec 3 1K 3
mld 6 1K 6
igmp 6 1K 6
toponodes 6 1K 6
isadev 6 1K 6
mount 16 1K 89
pci_link 10 1K 10
newdirblk 5 1K 4513
crypto 4 1K 445
encap_export_host 12 1K 12
procdesc 5 1K 18
diradd 4 1K 4782
pfil 4 1K 4
cdev 2 1K 2
inpcbpolicy 15 1K 3308
osd 8 1K 1298
chacha20random 1 1K 1
NFSD lckfile 1 1K 1
NFSD V4client 1 1K 1
DEVFS 9 1K 10
vnodes 1 1K 21
CAM SIM 2 1K 2
ktls 1 1K 1
feeder 7 1K 7
pf_osfp 2 1K 2
tcpfunc 3 1K 3
loginclass 3 1K 6
prison 6 1K 6
lkpikmalloc 5 1K 6
aesni_data 2 1K 2
soname 5 1K 9543
apmdev 1 1K 1
atkbddev 2 1K 2
CAM dev queue 2 1K 2
xform 2 1K 1139
CAM I/O Scheduler 1 1K 1
CAM path 4 1K 1034
pmchooks 1 1K 1
nexusdev 7 1K 7
filecaps 5 1K 120
sctp_vrf 1 1K 1
ip6_msource 1 1K 2
ip_msource 1 1K 1
vnet 1 1K 1
entropy 2 1K 48
acpiintr 1 1K 1
pmc 1 1K 1
cpus 2 1K 2
vnet_data_free 1 1K 1
Per-cpu 1 1K 1
p1003.1b 1 1K 1
tcp_do 0 0K 0
tcp_fsb 0 0K 252
mqdata 0 0K 0
cdg data 0 0K 10
vegas data 0 0K 0
dctcp data 0 0K 0
sctp_mcore 0 0K 0
sctp_socko 0 0K 3917
sctp_iter 0 0K 17
sctp_mvrf 0 0K 0
sctp_cpal 0 0K 13
sctp_cmsg 0 0K 0
sctp_stre 0 0K 0
sctp_athi 0 0K 0
sctp_a_it 0 0K 12
sctp_aadr 0 0K 33
chd data 0 0K 0
htcp data 0 0K 5
cubic data 0 0K 5
pf_table 0 0K 72
pf_rule 0 0K 192
pf_altq 0 0K 0
pf_temp 0 0K 0
NEWdirectio 0 0K 0
NEWNFSnode 0 0K 0
madt_table 0 0K 2
smartpqi 0 0K 0
NFSCL lck 0 0K 0
NFSCL lckown 0 0K 0
NFSCL client 0 0K 0
NFSCL deleg 0 0K 0
NFSCL open 0 0K 0
NFSCL owner 0 0K 0
NFS fh 0 0K 0
NFS req 0 0K 0
iavf 0 0K 0
ixl 0 0K 0
NFSD usrgroup 0 0K 0
NFSD string 0 0K 0
NFSD V4lock 0 0K 0
NFSD V4state 0 0K 0
NFSD srvcache 0 0K 0
ice-resmgr 0 0K 0
ice-osdep 0 0K 0
ice 0 0K 0
axgbe 0 0K 0
msdosfs_fat 0 0K 0
msdosfs_mount 0 0K 0
msdosfs_node 0 0K 0
DEVFS4 0 0K 0
DEVFS2 0 0K 0
xen_intr 0 0K 0
gntdev 0 0K 0
privcmd_dev 0 0K 0
xen_hvm 0 0K 0
legacydrv 0 0K 0
qpidrv 0 0K 0
evtchn_dev 0 0K 0
xenstore 0 0K 0
dmar_idpgtbl 0 0K 0
dmar_dom 0 0K 0
dmar_ctx 0 0K 0
ciss_data 0 0K 0
BACKLIGHT 0 0K 0
xnb 0 0K 0
isci 0 0K 0
iommu_dmamap 0 0K 0
xbbd 0 0K 0
hyperv_socket 0 0K 0
bxe_ilt 0 0K 0
xenbus 0 0K 0
xbd 0 0K 0
Balloon 0 0K 0
sysmouse 0 0K 0
vm_fictitious 0 0K 0
vtfont 0 0K 0
ath_hal 0 0K 0
athdev 0 0K 0
ata_pci 0 0K 0
ata_dma 0 0K 0
ata_generic 0 0K 0
amr 0 0K 0
pvscsi 0 0K 0
scsi_da 0 0K 69
UMAHash 0 0K 0
ata_da 0 0K 0
vm_pgdata 0 0K 0
jblocks 0 0K 0
savedino 0 0K 3909
sentinel 0 0K 0
jfsync 0 0K 0
jtrunc 0 0K 0
sbdep 0 0K 362
jsegdep 0 0K 0
jseg 0 0K 0
jfreefrag 0 0K 0
jfreeblk 0 0K 0
jnewblk 0 0K 0
jmvref 0 0K 0
jremref 0 0K 0
jaddref 0 0K 0
freedep 0 0K 0
freefrag 0 0K 29
allocindir 0 0K 0
indirdep 0 0K 1306
allocdirect 0 0K 0
ufs_trim 0 0K 0
mactemp 0 0K 0
audit_trigger 0 0K 0
audit_pipe_presel 0 0K 0
audit_pipeent 0 0K 0
audit_pipe 0 0K 0
audit_evname 0 0K 0
audit_bsm 0 0K 0
audit_gidset 0 0K 0
audit_text 0 0K 0
audit_path 0 0K 0
audit_data 0 0K 0
audit_cred 0 0K 0
scsi_ch 0 0K 0
scsi_cd 0 0K 0
AHCI driver 0 0K 0
USBdev 0 0K 0
USB 0 0K 0
agp 0 0K 0
nvme_da 0 0K 0
ktls_ocf 0 0K 0
MLX5EEPROM 0 0K 0
MLX5EEPROM 0 0K 0
MLX5EEPROM 0 0K 0
MLX5EEPROM 0 0K 0
MLX5E_TLS 0 0K 0
MLX5EEPROM 0 0K 0
MLX5EEPROM 0 0K 0
MLX5EEPROM 0 0K 0
MLX5EN 0 0K 0
MLX5EEPROM 0 0K 0
MLX5EEPROM 0 0K 0
MLX5EEPROM 0 0K 0
MLX5DUMP 0 0K 0
MLX5EEPROM 0 0K 0
MLX5EEPROM 0 0K 0
seq_file 0 0K 0
radix 0 0K 0
idr 0 0K 0
lkpifw 0 0K 0
NLM 0 0K 0
ipsec-spdcache 0 0K 0
ipsec-reg 0 0K 0
ipsec-misc 0 0K 0
ipsecrequest 0 0K 0
ip6opt 0 0K 49
ip6_moptions 0 0K 8
in6_mfilter 0 0K 16
frag6 0 0K 0
tcplog 0 0K 0
tcp_hwpace 0 0K 0
acpipwr 0 0K 0
acpi_perf 0 0K 0
LRO 0 0K 0
newreno data 0 0K 0
ip_moptions 0 0K 9
in_mfilter 0 0K 10
ipid 0 0K 0
80211scan 0 0K 0
80211ratectl 0 0K 0
80211power 0 0K 0
80211nodeie 0 0K 0
80211node 0 0K 0
80211mesh_gt 0 0K 0
80211mesh_rt 0 0K 0
80211perr 0 0K 0
80211prep 0 0K 0
80211preq 0 0K 0
80211dfs 0 0K 0
80211crypto 0 0K 0
80211vap 0 0K 0
iflib 0 0K 0
vlan 0 0K 0
gif 0 0K 0
ifdescr 0 0K 0
zlib 0 0K 0
fadvise 0 0K 8
VN POLL 0 0K 4
twsbuf 0 0K 0
statfs 0 0K 4756
namei_tracker 0 0K 0
export_host 0 0K 0
cl_savebuf 0 0K 159
twe_commands 0 0K 0
twa_commands 0 0K 0
tcp_log_dev 0 0K 142
midi buffers 0 0K 0
mixer 0 0K 0
ac97 0 0K 0
hdacc 0 0K 0
hdac 0 0K 0
hdaa 0 0K 0
acpicmbat 0 0K 0
SIIS driver 0 0K 0
CAM CCB 0 0K 23637
PUC 0 0K 0
ppbusdev 0 0K 0
agtiapi_MemAlloc malloc 0 0K 0
biobuf 0 0K 0
aios 0 0K 0
lio 0 0K 5
acl 0 0K 0
osti_cacheable 0 0K 0
mbuf_tag 0 0K 172
tempbuff 0 0K 0
tempbuff 0 0K 0
ag_tgt_map_t malloc 0 0K 0
ag_slr_map_t malloc 0 0K 0
lDevFlags * malloc 0 0K 0
tiDeviceHandle_t * malloc 0 0K 0
ag_portal_data_t malloc 0 0K 0
ag_device_t malloc 0 0K 0
STLock malloc 0 0K 0
CCB List 0 0K 0
sr_iov 0 0K 0
OCS 0 0K 0
OCS 0 0K 0
nvme 0 0K 0
nvd 0 0K 0
netmap 0 0K 0
mwldev 0 0K 0
MVS driver 0 0K 0
CAM ccb queue 0 0K 0
mrsasbuf 0 0K 0
mpt_user 0 0K 0
mps_user 0 0K 0
accf 0 0K 0
pts 0 0K 0
iov 0 0K 19718
ioctlops 0 0K 846
eventfd 0 0K 10
Witness 0 0K 0
stack 0 0K 0
MPSSAS 0 0K 0
mps 0 0K 0
mpr_user 0 0K 0
MPRSAS 0 0K 0
mpr 0 0K 0
mfibuf 0 0K 0
sbuf 0 0K 288
md_sectors 0 0K 0
firmware 0 0K 0
compressor 0 0K 0
md_disk 0 0K 0
SWAP 0 0K 0
malodev 0 0K 0
LED 0 0K 0
sysctltmp 0 0K 954
sysctl 0 0K 3
ekcd 0 0K 0
dumper 0 0K 0
sendfile 0 0K 0
rctl 0 0K 0
ix_sriov 0 0K 0
aacraidcam 0 0K 0
aacraid_buf 0 0K 0
ix 0 0K 0
ipsbuf 0 0K 0
cache 0 0K 0
iirbuf 0 0K 0
prison_racct 0 0K 0
Fail Points 0 0K 0
sigio 0 0K 12
filedesc_to_leader 0 0K 0
pwd 0 0K 0
tty console 0 0K 0
aaccam 0 0K 0
aacbuf 0 0K 0
zstd 0 0K 0
XZ_DEC 0 0K 0
nvlist 0 0K 0
SCSI ENC 0 0K 0
SCSI sa 0 0K 0
scsi_pass 0 0K 0
isofs_node 0 0K 0
isofs_mount 0 0K 0
tr_raid5_data 0 0K 0
tr_raid1e_data 0 0K 0
tr_raid1_data 0 0K 0
tr_raid0_data 0 0K 0
tr_concat_data 0 0K 0
md_sii_data 0 0K 0
md_promise_data 0 0K 0
md_nvidia_data 0 0K 0
md_jmicron_data 0 0K 0
md_intel_data 0 0K 0
md_ddf_data 0 0K 0
raid_data 0 0K 72
geom_flashmap 0 0K 0
tmpfs dir 0 0K 0
tmpfs name 0 0K 0
tmpfs mount 0 0K 0
NFS FHA 0 0K 0
newnfsmnt 0 0K 0
newnfsclient_req 0 0K 0
NFSCL layrecall 0 0K 0
NFSCL session 0 0K 0
NFSCL sockreq 0 0K 0
NFSCL devinfo 0 0K 0
NFSCL flayout 0 0K 0
NFSCL layout 0 0K 0
NFSD rollback 0 0K 0
NFSCL diroff 0 0K 0
db> show uma
Zone Size Used Free Requests Sleeps Bucket Total Mem XFree
mbuf_jumbo_page 4096 8320 2329 181174 0 254 43618304 0
tcp_log 416 0 9099 125532 0 254 3785184 0
mbuf 256 8909 2971 1212671 0 254 3041280 0
pbuf 2624 0 762 0 0 2 1999488 0
BUF TRIE 144 434 11326 20931 0 62 1693440 0
RADIX NODE 144 9741 1762 224066 0 62 1656432 0
malloc-384 384 4251 39 4403 0 30 1647360 0
malloc-128 128 11313 64 11888 0 126 1456256 0
UMA Slabs 0 112 12151 14 12151 0 126 1362480 0
malloc-4096 4096 327 3 842 0 2 1351680 0
mbuf_cluster 2048 645 1 645 0 254 1323008 0
vmem btag 56 19900 19 19900 0 254 1115464 0
ertt_txseginfo 40 1 27370 803434 0 254 1094840 0
tcp_bbr_map 128 0 6417 221410 0 127 821376 0
malloc-16384 16384 39 6 4535 0 1 737280 0
256 Bucket 2048 321 15 18579 0 8 688128 0
FFS inode 1160 559 29 5223 0 8 682080 0
malloc-4096 4096 120 6 6113 0 2 516096 0
VM OBJECT 264 1716 99 83301 0 30 479160 0
sctp_asoc 2288 74 126 2430 0 254 457600 0
THREAD 1808 189 31 7641 0 8 397760 0
lkpimm 160 1 2324 1 0 62 372000 0
lkpicurr 160 2 2323 2 0 62 372000 0
malloc-256 256 137 1303 26845 0 62 368640 0
MAP ENTRY 96 3305 391 323041 0 126 354816 0
VNODE 448 597 87 5263 0 30 306432 0
malloc-64 64 4193 154 76163 0 254 278208 0
malloc-2048 2048 66 68 5437 0 8 274432 0
malloc-65536 65536 4 0 4 0 1 262144 0
sctp_ep 1280 75 123 5425 0 254 253440 0
malloc-16 16 14179 571 21736 0 254 236000 0
DEVCTL 1024 0 220 153 0 0 225280 0
VMSPACE 2544 70 11 5532 0 4 206064 0
malloc-65536 65536 1 2 75 0 1 196608 0
malloc-32768 32768 0 6 1095 0 1 196608 0
UMA Zones 768 242 2 242 0 16 187392 0
malloc-32 32 5364 54 5804 0 254 173376 0
malloc-128 128 1264 69 34115 0 126 170624 0
sctp_raddr 736 74 157 2843 0 254 170016 0
malloc-128 128 1219 83 11597 0 126 166656 0
mbuf_packet 256 118 527 22402 0 254 165120 0
PROC 1336 96 18 5557 0 8 152304 0
FFS2 dinode 256 559 26 5223 0 62 149760 0
malloc-1024 1024 82 62 2972 0 16 147456 0
S VFS Cache 104 1029 336 5828 0 126 141960 0
malloc-256 256 202 338 17223 0 62 138240 0
128 Bucket 1024 65 66 2604 0 16 134144 0
malloc-65536 65536 2 0 2 0 1 131072 0
malloc-65536 65536 0 2 556 0 1 131072 0
malloc-65536 65536 2 0 2 0 1 131072 0
malloc-32768 32768 0 4 130 0 1 131072 0
filedesc0 1072 97 22 5582 0 8 127568 0
clpbuf 2624 0 48 2780 0 16 125952 0
malloc-384 384 171 139 8203 0 30 119040 0
malloc-1024 1024 110 6 127 0 16 118784 0
socket 944 41 83 10255 0 254 117056 0
ksiginfo 112 99 945 629 0 126 116928 0
malloc-2048 2048 7 49 23671 0 8 114688 0
malloc-384 384 18 272 5138 0 30 111360 0
sctp_chunk 152 83 645 1889 0 254 110656 0
UMA Kegs 384 227 6 227 0 30 89472 0
malloc-128 128 311 371 5129 0 126 87296 0
malloc-2048 2048 4 38 511 0 8 86016 0
malloc-16384 16384 4 1 179 0 1 81920 0
malloc-8192 8192 5 5 135 0 1 81920 0
64 Bucket 512 115 29 9047 0 30 73728 0
g_bio 408 0 180 62937 0 30 73440 0
tcpcb 1080 4 59 1287 0 254 68040 0
malloc-65536 65536 0 1 8 0 1 65536 0
malloc-32768 32768 2 0 2 0 1 65536 0
malloc-256 256 124 131 5970 0 62 65280 0
malloc-256 256 152 58 699 0 62 53760 0
malloc-4096 4096 12 1 23 0 2 53248 0
32 Bucket 256 75 120 15254 0 62 49920 0
malloc-16384 16384 3 0 3 0 1 49152 0
malloc-8192 8192 6 0 6 0 1 49152 0
malloc-8192 8192 4 2 14 0 1 49152 0
malloc-64 64 610 146 24077 0 254 48384 0
udplite_inpcb 496 0 96 1495 0 254 47616 0
pcpu-8 8 4741 891 9787 0 254 45056 0
malloc-384 384 75 35 291 0 30 42240 0
malloc-256 256 114 51 1346 0 62 42240 0
DIRHASH 1024 34 6 34 0 16 40960 0
NAMEI 1024 0 40 35926 0 16 40960 0
malloc-8192 8192 5 0 5 0 1 40960 0
tcp_bbr_pcb 832 0 45 670 0 16 37440 0
malloc-4096 4096 9 0 9 0 2 36864 0
malloc-64 64 478 89 690 0 254 36288 0
pipe 744 23 22 508 0 16 33480 0
malloc-32768 32768 1 0 1 0 1 32768 0
malloc-2048 2048 2 14 74 0 8 32768 0
pcpu-64 64 487 25 487 0 254 32768 0
Files 80 273 127 23991 0 126 32000 0
tcp_inpcb 496 4 60 1287 0 254 31744 0
TURNSTILE 136 221 10 221 0 62 31416 0
malloc-256 256 30 90 4940 0 62 30720 0
malloc-2048 2048 5 9 412 0 8 28672 0
malloc-1024 1024 13 15 1555 0 16 28672 0
malloc-512 512 3 53 747 0 30 28672 0
malloc-64 64 280 161 11289 0 254 28224 0
malloc-64 64 116 325 5111 0 254 28224 0
KNOTE 160 28 147 50680 0 62 28000 0
8 Bucket 80 57 293 2872 0 126 28000 0
malloc-128 128 51 166 607 0 126 27776 0
malloc-8192 8192 2 1 4 0 1 24576 0
malloc-4096 4096 3 3 4760 0 2 24576 0
malloc-2048 2048 12 0 203 0 8 24576 0
PWD 32 40 716 4590 0 254 24192 0
malloc-32 32 325 431 15032 0 254 24192 0
ttyinq 160 135 15 300 0 62 24000 0
malloc-128 128 90 96 4714 0 126 23808 0
ttyoutq 256 72 18 160 0 62 23040 0
malloc-256 256 39 51 457 0 62 23040 0
SLEEPQUEUE 88 221 35 221 0 126 22528 0
tcp_rack_pcb 832 0 27 252 0 16 22464 0
malloc-1024 1024 17 3 17 0 16 20480 0
Mountpoints 2752 2 5 2 0 4 19264 0
malloc-384 384 35 15 37 0 30 19200 0
malloc-384 384 36 14 36 0 30 19200 0
malloc-8192 8192 2 0 2 0 1 16384 0
malloc-4096 4096 2 2 85 0 2 16384 0
malloc-4096 4096 2 2 16 0 2 16384 0
malloc-2048 2048 2 6 315 0 8 16384 0
malloc-1024 1024 11 5 11 0 16 16384 0
malloc-512 512 22 10 471 0 30 16384 0
sctp_laddr 48 106 230 1807 0 254 16128 0
malloc-64 64 158 94 239 0 254 16128 0
malloc-32 32 175 329 8577 0 254 16128 0
16 Bucket 144 59 53 764 0 62 16128 0
vtnet_tx_hdr 24 0 668 627452 0 254 16032 0
malloc-256 256 34 26 1727 0 62 15360 0
malloc-1024 1024 8 4 9 0 16 12288 0
malloc-512 512 10 14 213 0 30 12288 0
sctp_stream_msg_out 112 28 80 606 0 254 12096 0
tcp_rack_map 112 0 108 461 0 126 12096 0
malloc-64 64 87 102 683 0 254 12096 0
malloc-32 32 160 218 276 0 254 12096 0
2 Bucket 32 59 319 1189 0 254 12096 0
malloc-16 16 346 404 589 0 254 12000 0
malloc-16 16 179 571 8600 0 254 12000 0
ripcb 496 5 19 201 0 254 11904 0
udp_inpcb 496 6 18 325 0 254 11904 0
kenv 258 15 30 1042 0 30 11610 0
unpcb 256 20 25 1457 0 254 11520 0
malloc-8192 8192 1 0 1 0 1 8192 0
malloc-4096 4096 0 2 8 0 2 8192 0
malloc-1024 1024 2 6 15 0 16 8192 0
malloc-1024 1024 1 7 77 0 16 8192 0
malloc-512 512 1 15 16 0 30 8192 0
malloc-512 512 12 4 26 0 30 8192 0
malloc-512 512 0 16 16 0 30 8192 0
rtentry 176 30 16 34 0 62 8096 0
tcptw 88 0 92 7 0 254 8096 0
PGRP 88 35 57 65 0 126 8096 0
rl_entry 40 86 116 86 0 254 8080 0
sctp_asconf_ack 48 11 157 21 0 254 8064 0
udpcb 32 6 246 1820 0 254 8064 0
AIOP 32 4 248 4 0 254 8064 0
ertt 72 4 108 1287 0 126 8064 0
malloc-64 64 13 113 104 0 254 8064 0
malloc-32 32 138 114 197 0 254 8064 0
malloc-32 32 21 231 73 0 254 8064 0
malloc-32 32 38 214 885 0 254 8064 0
4 Bucket 48 5 163 142 0 254 8064 0
malloc-16 16 6 494 1300 0 254 8000 0
malloc-16 16 16 484 24 0 254 8000 0
malloc-16 16 187 313 1417 0 254 8000 0
malloc-16 16 29 471 29775 0 254 8000 0
malloc-128 128 25 37 136 0 126 7936 0
malloc-128 128 11 51 306 0 126 7936 0
sctp_readq 152 0 52 204 0 254 7904 0
AIO 208 0 38 12 0 62 7904 0
cryptop 280 0 28 76 0 30 7840 0
AIOCB 552 0 14 6 0 16 7728 0
routing nhops 256 27 3 34 0 62 7680 0
malloc-384 384 1 19 349 0 30 7680 0
malloc-384 384 1 19 16 0 30 7680 0
AIOLIO 272 0 28 5 0 30 7616 0
FPU_save_area 832 1 8 1 0 16 7488 0
cpuset 104 7 55 7 0 126 6448 0
epoch_record pcpu 256 4 12 4 0 62 4096 0
malloc-2048 2048 1 1 1 0 8 4096 0
malloc-512 512 4 4 4 0 30 4096 0
pcpu-16 16 7 249 7 0 254 4096 0
tcp_log_bucket 176 0 23 1 0 62 4048 0
hostcache 64 1 62 1 0 254 4032 0
syncache 168 0 24 4 0 254 4032 0
tcp_log_node 120 0 33 2 0 126 3960 0
UMA Slabs 1 176 10 12 10 0 62 3872 0
mqnode 416 3 6 3 0 30 3744 0
KMAP ENTRY 96 12 27 14 0 0 3744 0
vmem 1856 1 1 1 0 8 3712 0
SMR CPU 32 3 60 3 0 254 2016 0
SMR SHARED 24 3 60 3 0 254 1512 0
FFS1 dinode 128 0 0 0 0 126 0 0
da_ccb 544 0 0 0 0 16 0 0
ada_ccb 272 0 0 0 0 30 0 0
swblk 136 0 0 0 0 62 0 0
swpctrie 144 0 0 0 0 62 0 0
sctp_asconf 40 0 0 0 0 254 0 0
cdg_qdiffsample 16 0 0 0 0 254 0 0
pf state scrubs 40 0 0 0 0 254 0 0
pf frag entries 40 0 0 0 0 254 0 0
pf frags 248 0 0 0 0 62 0 0
pf table entries 160 0 0 0 0 62 0 0
pf table entry counters 64 0 0 0 0 254 0 0
pf source nodes 136 0 0 0 0 254 0 0
pf state keys 88 0 0 0 0 126 0 0
pf states 304 0 0 0 0 254 0 0
pf tags 104 0 0 0 0 126 0 0
pf mtags 48 0 0 0 0 254 0 0
tcpreass 48 0 0 0 0 254 0 0
tfo_ccache_entries 80 0 0 0 0 126 0 0
tfo 4 0 0 0 0 254 0 0
sackhole 32 0 0 0 0 254 0 0
ipq 56 0 0 0 0 254 0 0
IPsec SA lft_c 16 0 0 0 0 254 0 0
itimer 352 0 0 0 0 30 0 0
TMPFS node 224 0 0 0 0 62 0 0
mqnotifier 216 0 0 0 0 62 0 0

---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

syzbot

unread,

Jul 11, 2021, 1:23:18 AM7/11/21

to syzkaller-f...@googlegroups.com

syzbot has found a reproducer for the following issue on:

HEAD commit: 58080fbc libalias: fix divide by zero causing panic

git tree: https://github.com/freebsd/freebsd-src.git main

console output: https://syzkaller.appspot.com/x/log.txt?x=101d886c300000
dashboard link: https://syzkaller.appspot.com/bug?extid=d9a004cd64d2b3cff518
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12a31cd2300000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d9a004...@syzkaller.appspotmail.com

panic: ASan: Invalid access, 8-byte read at 0xfffffe009eec5e80, UMAUseAfterFree(fd)
cpuid = 1
time = 1625979048
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc7/frame 0xfffffe009ec76130
kdb_backtrace() at kdb_backtrace+0xd3/frame 0xfffffe009ec76290
vpanic() at vpanic+0x2c5/frame 0xfffffe009ec76370
panic() at panic+0xb5/frame 0xfffffe009ec76430
__asan_load8_noabort() at __asan_load8_noabort+0x36f/frame 0xfffffe009ec764f0
__mtx_lock_flags() at __mtx_lock_flags+0x122/frame 0xfffffe009ec765e0
sctp_endpoint_probe() at sctp_endpoint_probe+0xce/frame 0xfffffe009ec76650
sctp_inpcb_bind() at sctp_inpcb_bind+0x99a/frame 0xfffffe009ec76790
sctp6_bind() at sctp6_bind+0x171/frame 0xfffffe009ec76880
sobind() at sobind+0xd5/frame 0xfffffe009ec768d0
kern_bindat() at kern_bindat+0x25e/frame 0xfffffe009ec769b0
sys_bind() at sys_bind+0xfb/frame 0xfffffe009ec769f0
amd64_syscall() at amd64_syscall+0x425/frame 0xfffffe009ec76bf0
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe009ec76bf0

--- syscall (198, FreeBSD ELF64, nosys), rip = 0x287eda, rsp = 0x7fffdfffdf08, rbp = 0x7fffdfffdf70 ---
KDB: enter: panic

[ thread pid 4775 tid 104046 ]
Stopped at kdb_enter+0x6b: movq $0,0x28f9c3a(%rip)

db>
db> set $lines = 0
db> set $maxwidth = 0
db> show registers
cs 0x20
ds 0x3b
es 0x3b
fs 0x13
gs 0x1b
ss 0x28
rax 0x12

rcx 0x223993bbc06cb20
rdx 0xdffff7c000000000
rbx 0
rsp 0xfffffe009ec76270
rbp 0xfffffe009ec76290
rsi 0x1
rdi 0xffffffff840860c0 cov_trace_pc
r8 0x3
r9 0xfffffe009ec75dc8
r10 0
r11 0xfffffe009ea2fc30
r12 0xfffffe009ea2f720
r13 0xfffffe009ec76201
r14 0xffffffff82c427e0 .str.18
r15 0xffffffff82c427e0 .str.18
rip 0xffffffff8178edfb kdb_enter+0x6b
rflags 0x46
kdb_enter+0x6b: movq $0,0x28f9c3a(%rip)
db> show proc
Process 4775 (syz-executor.1) at 0xfffffe009ee73a70:

state: NORMAL
uid: 0 gids: 0, 0, 5

parent: pid 809 at 0xfffffe00973e3000

ABI: FreeBSD ELF64
flag: 0x10000080 flag2: 0

arguments: /root/syz-executor.1

reaper: 0xfffffe0053d51538 reapsubtree: 1
sigparent: 20

vmspace: 0xfffffe009eeb73e0
(map 0xfffffe009eeb73e0)
(map.pmap 0xfffffe009eeb74a0)
(pmap 0xfffffe009eeb7500)
threads: 2
102810 RunQ syz-executor.1
104046 Run CPU 1 syz-executor.1

db> ps
pid ppid pgrp uid state wmesg wchan cmd

4775 809 809 0 R (threaded) syz-executor.1
102810 RunQ syz-executor.1
104046 Run CPU 1 syz-executor.1
4774 813 813 0 T (threaded) syz-executor.0
100123 s syz-executor.0
104044 RunQ syz-executor.0
4773 810 810 0 T (threaded) syz-executor.3
100114 s syz-executor.3
104039 RunQ syz-executor.3
3659 3653 3659 0 Ss select 0xfffffe009eb74dc0 dhclient
3656 1 3656 0 Ss select 0xfffffe009eb74c40 dhclient
3653 3646 436 65 S select 0xfffffe009ea64040 dhclient
3646 436 436 0 S wait 0xfffffe00972fe000 sh
3637 1 3637 65 Ss select 0xfffffe009ea14ec0 dhclient
870 1 870 0 Ss select 0xfffffe009e9ff6c0 dhclient
862 1 862 0 Ss select 0xfffffe009ea14dc0 dhclient
813 807 813 0 Ss nanslp 0xffffffff84055901 syz-executor.0
812 807 812 0 Rs syz-executor.2
810 807 810 0 Ss nanslp 0xffffffff84055901 syz-executor.3
809 807 809 0 Ss nanslp 0xffffffff84055901 syz-executor.1
807 805 805 0 R (threaded) syz-execprog
100103 S uwait 0xfffffe005834c280 syz-execprog
100125 S nanslp 0xffffffff84055901 syz-execprog
100126 S uwait 0xfffffe009e394a00 syz-execprog
100127 S uwait 0xfffffe009e394b00 syz-execprog
100128 S uwait 0xfffffe009e394c00 syz-execprog
100129 S uwait 0xfffffe009e465380 syz-execprog
100130 S kqread 0xfffffe009723c300 syz-execprog
100131 RunQ syz-execprog
100132 S uwait 0xfffffe009e394000 syz-execprog
100133 S uwait 0xfffffe009e465480 syz-execprog
805 803 805 0 Ss pause 0xfffffe009bf1e0b0 csh
803 694 803 0 Ss select 0xfffffe009e465f40 sshd

760 1 760 0 Ss+ ttyin 0xfffffe0056fe0cb0 getty

759 1 759 0 Ss+ ttyin 0xfffffe00583ed0b0 getty
758 1 758 0 Ss+ ttyin 0xfffffe00583ed4b0 getty
757 1 757 0 Ss+ ttyin 0xfffffe00583ed8b0 getty
756 1 756 0 Ss+ ttyin 0xfffffe00583edcb0 getty
755 1 755 0 Ss+ ttyin 0xfffffe00583950b0 getty
754 1 754 0 Ss+ ttyin 0xfffffe00583954b0 getty
753 1 753 0 Ss+ ttyin 0xfffffe00583958b0 getty
752 1 752 0 Ss+ ttyin 0xfffffe0058395cb0 getty
698 1 698 0 Ss nanslp 0xffffffff84055900 cron
694 1 694 0 Ss select 0xfffffe009e465d40 sshd
507 1 507 0 Ss select 0xfffffe00973ea4c0 syslogd
436 1 436 0 Ss wait 0xfffffe009e35f538 devd
435 1 435 65 Ss select 0xfffffe00973ea240 dhclient
350 1 350 0 Ss select 0xfffffe00973ea440 dhclient
347 1 347 0 Ss select 0xfffffe009e394dc0 dhclient

23 0 0 0 DL syncer 0xffffffff8417ba40 [syncer]

22 0 0 0 DL vlruwt 0xfffffe0058747a70 [vnlru]

21 0 0 0 DL (threaded) [bufdaemon]
100083 D qsleep 0xffffffff84179940 [bufdaemon]

100086 D - 0xffffffff83411f80 [bufspacedaemon-0]
100095 D sdflush 0xfffffe0097327ce8 [/ worker]

20 0 0 0 DL psleep 0xffffffff841b1c80 [vmdaemon]
19 0 0 0 DL (threaded) [pagedaemon]
100081 D psleep 0xffffffff841a57b8 [dom0]

100087 D launds 0xffffffff841a57c4 [laundry: dom0]
100088 D umarcl 0xffffffff81e7e640 [uma]

18 0 0 0 DL - 0xffffffff83e0caa0 [rand_harvestq]

17 0 0 0 DL waiting 0xffffffff84875460 [sctp_iterator]
16 0 0 0 RL [pf purge]

100013 D - 0xfffffe000791a400 [inm_free taskq]
100015 D - 0xfffffe000791a200 [kqueue_ctx taskq]
100016 D - 0xfffffe000791a100 [linuxkpi_irq_wq]
100017 D - 0xfffffe000791a000 [aiod_kick taskq]

100018 D - 0xfffffe0053df6e00 [in6m_free taskq]
100019 D - 0xfffffe0053df6d00 [pci_hp taskq]
100020 D - 0xfffffe0053df6c00 [linuxkpi_short_wq_0]
100021 D - 0xfffffe0053df6c00 [linuxkpi_short_wq_1]
100022 D - 0xfffffe0053df6c00 [linuxkpi_short_wq_2]
100023 D - 0xfffffe0053df6c00 [linuxkpi_short_wq_3]
100024 D - 0xfffffe0053df6b00 [linuxkpi_long_wq_0]
100025 D - 0xfffffe0053df6b00 [linuxkpi_long_wq_1]
100026 D - 0xfffffe0053df6b00 [linuxkpi_long_wq_2]
100027 D - 0xfffffe0053df6b00 [linuxkpi_long_wq_3]
100036 D - 0xfffffe0053df6a00 [firmware taskq]
100040 D - 0xfffffe0053df6900 [crypto_0]
100041 D - 0xfffffe0053df6900 [crypto_1]
100057 D - 0xfffffe0053df6700 [vtnet0 rxq 0]
100058 D - 0xfffffe0053df6600 [vtnet0 txq 0]
100059 D - 0xfffffe0053df6500 [vtnet0 rxq 1]
100060 D - 0xfffffe0053df6400 [vtnet0 txq 1]
100062 D vtbslp 0xfffffe0056fc0380 [virtio_balloon]
100066 D - 0xfffffe0053df6300 [mca taskq]

100071 D - 0xffffffff82c49761 [deadlkres]
100076 D - 0xfffffe0058394e00 [acpi_task_0]
100077 D - 0xfffffe0058394e00 [acpi_task_1]
100078 D - 0xfffffe0058394e00 [acpi_task_2]

100079 D - 0xfffffe0053df6800 [CAM taskq]

4771 812 812 0 Z syz-executor.2
db> show all locks
Process 4775 (syz-executor.1) thread 0xfffffe009ea2f720 (104046)
exclusive rw sctp-info (sctp-info) r = 0 (0xfffffe00081ab308) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:2918

Process 0 (kernel) thread 0xfffffe0053df21e0 (100012)

exclusive sleep mutex kernel arena domain (kernel arena domain) r = 0 (0xfffff800064b9000) locked @ /syzkaller/managers/main/kernel/sys/kern/subr_vmem.c:789

exclusive sleep mutex vmem list lock (vmem list lock) r = 0 (0xffffffff83409bc0) locked @ /syzkaller/managers/main/kernel/sys/kern/subr_vmem.c:784
db> show malloc
Type InUse MemUse Requests
pf_hash 5 11524K 5
devbuf 4216 4338K 4244
tcp_hpts 6 3201K 6
sysctloid 34320 2027K 34387
vtbuf 24 1968K 46
kobj 326 1304K 486

newblk 23 1030K 4516
vfscache 3 1025K 3
inodedep 1137 938K 3988
pcb 27 539K 7863

ufs_quota 1 512K 1
vfs_hash 1 512K 1
callout 2 512K 2
intr 4 472K 4

dirrem 1114 279K 3914
subproc 131 260K 4849

acpica 1674 184K 54806
vnet_data 1 168K 1

vmem 3 146K 4
tidhash 3 141K 3
freefile 1114 140K 3911
linker 357 140K 397
pagedep 14 132K 3921
tfo_ccache 1 128K 1
filedesc 16 121K 7840

DEVFS1 107 107K 124
sem 4 106K 4

bus 986 80K 3469

mtx_pool 2 72K 2
syncache 1 68K 1

sctp_timw 263 66K 263

acpitask 1 64K 1
ddb_capture 1 64K 1
module 510 64K 510

BPF 30 53K 30
umtx 330 42K 330
kdtrace 208 42K 8823
temp 35 33K 2085
hostcache 1 32K 1
shm 1 32K 1

DEVFS3 126 32K 136
msg 4 30K 4
gtaskqueue 18 26K 18
kbdmux 6 22K 6

DEVFS_RULE 56 20K 56
ifaddr 68 20K 70

ufs_mount 5 17K 6
proc 3 17K 3

routetbl 132 17K 421

tty 16 16K 16
ithread 99 16K 99
bus-sc 33 14K 1684

lltable 42 13K 43

KTRACE 100 13K 100
ifnet 7 13K 7
ether_multi 152 13K 162
kenv 95 12K 95
eventhandler 133 12K 133

CAM queue 5 11K 1528
rman 84 10K 425
GEOM 60 10K 489
in6_multi 65 9K 65

bmsafemap 3 9K 3956

UART 12 9K 12
devstat 4 9K 4

ksem 1 8K 1

rpc 2 8K 2
shmfd 1 8K 1
pfs_vncache 1 8K 1

pfs_nodes 20 8K 20
audit_evclass 236 8K 294
taskqueue 60 7K 60
sglist 5 7K 5

CAM DEV 3 6K 510

cred 24 6K 332
kqueue 60 6K 4780
plimit 22 6K 516

ufs_dirhash 24 5K 24
UMA 270 5K 270

pf_ifnet 10 5K 19

vt 11 5K 11
memdesc 1 4K 1
MCA 32 4K 32
evdev 4 4K 4

pwddesc 57 4K 4776
acpisem 28 4K 28
session 28 4K 49

hhook 15 4K 17
fpukern_ctx 3 3K 3

terminal 11 3K 11
lockf 24 3K 55
proc-args 47 3K 626
selfd 38 3K 10243
uidinfo 3 3K 16

local_apic 1 2K 1
io_apic 1 2K 1

mkdir 16 2K 7810
ipsec-saq 2 2K 2
ip6ndp 12 2K 13
Unitno 31 2K 47
sctp_ifa 13 2K 14
select 13 2K 40

CAM XPT 22 2K 543

newdirblk 12 2K 3905
diradd 12 2K 3952

in_multi 6 2K 8
ipsecpolicy 2 2K 2
acpidev 20 2K 20
msi 9 2K 9
clone 9 2K 9
tun 7 2K 7

softdep 1 1K 1

sahead 1 1K 1
secasvar 1 1K 1
nhops 6 1K 8

vnodemarker 2 1K 114

NFSD session 1 1K 1
CAM periph 4 1K 271

ipsec 3 1K 3
sctp_ifn 6 1K 14
DEVFSP 12 1K 17

mld 6 1K 6
igmp 6 1K 6
toponodes 6 1K 6
isadev 6 1K 6
mount 16 1K 89
pci_link 10 1K 10

crypto 4 1K 4
encap_export_host 12 1K 12

pfil 4 1K 4
cdev 2 1K 2

sctp_atcl 1 1K 11647
inpcbpolicy 12 1K 183
chacha20random 1 1K 1
procdesc 3 1K 10
osd 7 1K 18

NFSD lckfile 1 1K 1
NFSD V4client 1 1K 1
DEVFS 9 1K 10

vnodes 1 1K 1

CAM SIM 2 1K 2
ktls 1 1K 1
feeder 7 1K 7

tcpfunc 3 1K 3
loginclass 3 1K 7

prison 6 1K 6
lkpikmalloc 5 1K 6
aesni_data 2 1K 2

soname 5 1K 11300

apmdev 1 1K 1
atkbddev 2 1K 2
CAM dev queue 2 1K 2

xform 2 1K 49

CAM I/O Scheduler 1 1K 1
CAM path 4 1K 1034
pmchooks 1 1K 1
nexusdev 7 1K 7

sctp_vrf 1 1K 1
freework 1 1K 3912
vnet 1 1K 1
entropy 2 1K 45

acpiintr 1 1K 1
pmc 1 1K 1

filecaps 3 1K 87
sctp_atky 1 1K 19407

cpus 2 1K 2
vnet_data_free 1 1K 1
Per-cpu 1 1K 1

sctp_athm 1 1K 15526
p1003.1b 1 1K 1

vegas data 0 0K 0
dctcp data 0 0K 0

chd data 0 0K 0

tcp_do 0 0K 0
tcp_fsb 0 0K 0
cubic data 0 0K 0
pf_table 0 0K 0
pf_rule 0 0K 0
pf_altq 0 0K 0
pf_osfp 0 0K 0
pf_temp 0 0K 0
htcp data 0 0K 0
mqdata 0 0K 0
cdg data 0 0K 0
sctp_mcore 0 0K 0
sctp_socko 0 0K 0
sctp_iter 0 0K 12
sctp_mvrf 0 0K 0
sctp_cpal 0 0K 0

sctp_cmsg 0 0K 0
sctp_stre 0 0K 0
sctp_athi 0 0K 0
sctp_a_it 0 0K 12

sctp_aadr 0 0K 0
sctp_stro 0 0K 3881
sctp_stri 0 0K 7758
sctp_map 0 0K 7762

savedino 0 0K 2799

sentinel 0 0K 0
jfsync 0 0K 0
jtrunc 0 0K 0

sbdep 0 0K 12

jsegdep 0 0K 0
jseg 0 0K 0
jfreefrag 0 0K 0
jfreeblk 0 0K 0
jnewblk 0 0K 0
jmvref 0 0K 0
jremref 0 0K 0
jaddref 0 0K 0
freedep 0 0K 0

freeblks 0 0K 3911
freefrag 0 0K 2
allocindir 0 0K 0
indirdep 0 0K 10

ip6opt 0 0K 3
ip6_msource 0 0K 0
ip6_moptions 0 0K 0
in6_mfilter 0 0K 0

frag6 0 0K 0
tcplog 0 0K 0
tcp_hwpace 0 0K 0
acpipwr 0 0K 0
acpi_perf 0 0K 0
LRO 0 0K 0
newreno data 0 0K 0

ip_msource 0 0K 0
ip_moptions 0 0K 0
in_mfilter 0 0K 0

ipid 0 0K 0
80211scan 0 0K 0
80211ratectl 0 0K 0
80211power 0 0K 0
80211nodeie 0 0K 0
80211node 0 0K 0
80211mesh_gt 0 0K 0
80211mesh_rt 0 0K 0
80211perr 0 0K 0
80211prep 0 0K 0
80211preq 0 0K 0
80211dfs 0 0K 0
80211crypto 0 0K 0
80211vap 0 0K 0
iflib 0 0K 0
vlan 0 0K 0
gif 0 0K 0
ifdescr 0 0K 0
zlib 0 0K 0

fadvise 0 0K 0
VN POLL 0 0K 0
twsbuf 0 0K 0
statfs 0 0K 4115

namei_tracker 0 0K 0
export_host 0 0K 0

cl_savebuf 0 0K 2

twe_commands 0 0K 0
twa_commands 0 0K 0

tcp_log_dev 0 0K 0

midi buffers 0 0K 0
mixer 0 0K 0
ac97 0 0K 0
hdacc 0 0K 0
hdac 0 0K 0
hdaa 0 0K 0
acpicmbat 0 0K 0
SIIS driver 0 0K 0

CAM CCB 0 0K 2069

PUC 0 0K 0
ppbusdev 0 0K 0
agtiapi_MemAlloc malloc 0 0K 0
biobuf 0 0K 0
aios 0 0K 0

lio 0 0K 0

acl 0 0K 0
osti_cacheable 0 0K 0

mbuf_tag 0 0K 101

tempbuff 0 0K 0
tempbuff 0 0K 0
ag_tgt_map_t malloc 0 0K 0
ag_slr_map_t malloc 0 0K 0
lDevFlags * malloc 0 0K 0
tiDeviceHandle_t * malloc 0 0K 0
ag_portal_data_t malloc 0 0K 0
ag_device_t malloc 0 0K 0
STLock malloc 0 0K 0
CCB List 0 0K 0
sr_iov 0 0K 0
OCS 0 0K 0
OCS 0 0K 0
nvme 0 0K 0
nvd 0 0K 0
netmap 0 0K 0
mwldev 0 0K 0
MVS driver 0 0K 0
CAM ccb queue 0 0K 0
mrsasbuf 0 0K 0
mpt_user 0 0K 0
mps_user 0 0K 0
accf 0 0K 0
pts 0 0K 0

iov 0 0K 14909
ioctlops 0 0K 100
eventfd 0 0K 0

Witness 0 0K 0
stack 0 0K 0
MPSSAS 0 0K 0
mps 0 0K 0
mpr_user 0 0K 0
MPRSAS 0 0K 0
mpr 0 0K 0
mfibuf 0 0K 0
sbuf 0 0K 288
md_sectors 0 0K 0
firmware 0 0K 0
compressor 0 0K 0
md_disk 0 0K 0
SWAP 0 0K 0
malodev 0 0K 0
LED 0 0K 0

sysctltmp 0 0K 721

sysctl 0 0K 3
ekcd 0 0K 0
dumper 0 0K 0
sendfile 0 0K 0
rctl 0 0K 0
ix_sriov 0 0K 0
aacraidcam 0 0K 0
aacraid_buf 0 0K 0
ix 0 0K 0
ipsbuf 0 0K 0
cache 0 0K 0
iirbuf 0 0K 0

kcovinfo 0 0K 0

prison_racct 0 0K 0
Fail Points 0 0K 0
sigio 0 0K 1

mbuf_jumbo_page 4096 8320 991 13506 0 254 38137856 0
pbuf 2624 0 989 0 0 2 2595136 0
mbuf 256 8630 940 101871 0 254 2449920 0
BUF TRIE 144 181 11579 680 0 62 1693440 0
malloc-384 384 4208 2 4209 0 30 1616640 0
malloc-128 128 11312 34 11433 0 126 1452288 0
malloc-4096 4096 327 4 495 0 2 1355776 0
UMA Slabs 0 112 10208 13 10208 0 126 1144752 0
vmem btag 56 16194 53 16194 0 254 909832 0
malloc-384 384 1136 784 3987 0 30 737280 0
FFS inode 1160 515 24 4426 0 8 625240 0
RADIX NODE 144 3496 363 125982 0 63 555696 0
malloc-256 256 1242 813 16672 0 62 526080 0

lkpimm 160 1 2324 1 0 62 372000 0
lkpicurr 160 2 2323 2 0 62 372000 0

malloc-256 256 163 1247 11139 0 62 360960 0
malloc-4096 4096 73 4 5323 0 2 315392 0
VM OBJECT 264 1095 60 69156 0 30 304920 0
THREAD 1808 149 16 4046 0 8 298320 0
malloc-128 128 1413 819 4359 0 126 285696 0
VNODE 448 550 71 4463 0 30 278208 0
malloc-64 64 4108 113 14624 0 254 270144 0

malloc-65536 65536 4 0 4 0 1 262144 0

256 Bucket 2048 116 4 11046 0 8 245760 0
malloc-16 16 14031 469 21876 0 254 232000 0
DEVCTL 1024 17 203 151 0 0 225280 0
malloc-16384 16384 8 5 3918 0 1 212992 0
sctp_ep 1280 1 155 3887 0 254 199680 0

UMA Zones 768 242 2 242 0 16 187392 0

malloc-32 32 5362 182 5556 0 254 177408 0
malloc-128 128 1265 68 32906 0 126 170624 0
mbuf_cluster 2048 75 1 75 0 254 155648 0
malloc-128 128 1111 67 10014 0 126 150784 0
S VFS Cache 104 1024 341 4954 0 126 141960 0
MAP ENTRY 96 1175 253 118805 0 126 137088 0
FFS2 dinode 256 515 10 4426 0 62 134400 0

malloc-65536 65536 2 0 2 0 1 131072 0

malloc-65536 65536 0 2 226 0 1 131072 0

malloc-65536 65536 2 0 2 0 1 131072 0

sctp_asoc 2288 0 55 3881 0 254 125840 0
ksiginfo 112 56 988 160 0 126 116928 0
malloc-1024 1024 110 2 127 0 16 114688 0
VMSPACE 2544 34 11 4754 0 4 114480 0
malloc-2048 2048 7 43 2076 0 8 102400 0
malloc-16384 16384 4 2 179 0 1 98304 0
PROC 1336 57 15 4775 0 8 96192 0

UMA Kegs 384 227 6 227 0 30 89472 0

filedesc0 1072 57 20 4776 0 8 82544 0
malloc-8192 8192 5 5 134 0 1 81920 0
malloc-256 256 281 34 4434 0 62 80640 0
g_bio 408 0 180 5729 0 30 73440 0
malloc-2048 2048 4 30 511 0 8 69632 0
128 Bucket 1024 52 15 1365 0 16 68608 0
malloc-65536 65536 1 0 1 0 1 65536 0

malloc-65536 65536 0 1 8 0 1 65536 0

malloc-32768 32768 0 2 130 0 1 65536 0

malloc-32768 32768 2 0 2 0 1 65536 0

socket 944 32 36 5318 0 254 64192 0

malloc-4096 4096 12 1 23 0 2 53248 0

64 Bucket 512 86 18 2898 0 30 53248 0

malloc-16384 16384 3 0 3 0 1 49152 0
malloc-8192 8192 6 0 6 0 1 49152 0

malloc-2048 2048 3 19 3891 0 8 45056 0
malloc-1024 1024 8 36 4397 0 16 45056 0
malloc-64 64 570 123 20899 0 254 44352 0
malloc-256 256 150 15 184 0 62 42240 0
clpbuf 2624 0 16 20 0 16 41984 0

malloc-8192 8192 5 0 5 0 1 40960 0

pcpu-8 8 4673 447 4829 0 254 40960 0
sctp_raddr 736 0 55 3881 0 254 40480 0
malloc-256 256 112 38 1150 0 62 38400 0
32 Bucket 256 76 74 12183 0 62 38400 0
DIRHASH 1024 34 2 34 0 16 36864 0
NAMEI 1024 0 36 29803 0 16 36864 0

malloc-4096 4096 9 0 9 0 2 36864 0
malloc-64 64 478 89 690 0 254 36288 0

malloc-384 384 75 15 124 0 30 34560 0

malloc-32768 32768 1 0 1 0 1 32768 0

malloc-8192 8192 4 0 4 0 1 32768 0

pcpu-64 64 487 25 487 0 254 32768 0

malloc-2048 2048 12 2 203 0 8 28672 0
malloc-1024 1024 13 15 1325 0 16 28672 0
malloc-512 512 0 56 7759 0 30 28672 0
malloc-384 384 1 69 11647 0 30 26880 0
TURNSTILE 136 166 23 166 0 62 25704 0

malloc-8192 8192 2 1 4 0 1 24576 0

malloc-4096 4096 3 3 4119 0 2 24576 0
malloc-4096 4096 2 4 6 0 2 24576 0
malloc-2048 2048 2 10 27 0 8 24576 0
PWD 32 19 737 4016 0 254 24192 0
malloc-64 64 201 177 9701 0 254 24192 0
malloc-64 64 19 359 12313 0 254 24192 0

ttyinq 160 135 15 300 0 62 24000 0

malloc-128 128 7 179 261 0 126 23808 0

ttyoutq 256 72 18 160 0 62 23040 0

pipe 744 21 9 340 0 16 22320 0
malloc-2048 2048 5 5 106 0 8 20480 0

malloc-1024 1024 17 3 17 0 16 20480 0

malloc-32 32 291 339 15919 0 254 20160 0
KNOTE 160 26 99 22876 0 62 20000 0
malloc-128 128 91 64 4017 0 126 19840 0

Mountpoints 2752 2 5 2 0 4 19264 0

mbuf_packet 256 8 67 19589 0 254 19200 0

malloc-384 384 36 14 36 0 30 19200 0

SLEEPQUEUE 88 166 26 166 0 126 16896 0

malloc-8192 8192 2 0 2 0 1 16384 0
malloc-4096 4096 2 2 85 0 2 16384 0

malloc-1024 1024 11 5 11 0 16 16384 0

malloc-64 64 156 96 166 0 254 16128 0
malloc-32 32 25 479 8247 0 254 16128 0
Files 80 141 59 15520 0 126 16000 0
8 Bucket 80 46 154 1214 0 126 16000 0
malloc-384 384 33 7 35 0 30 15360 0
malloc-256 256 39 21 218 0 62 15360 0
malloc-256 256 34 26 3989 0 62 15360 0
malloc-256 256 34 26 745 0 62 15360 0

malloc-1024 1024 8 4 9 0 16 12288 0

malloc-512 512 10 14 201 0 30 12288 0
malloc-32 32 160 218 271 0 254 12096 0
16 Bucket 144 40 44 322 0 62 12096 0
vtnet_tx_hdr 24 0 501 1873 0 254 12024 0
malloc-16 16 346 404 584 0 254 12000 0
udp_inpcb 496 6 18 170 0 254 11904 0
sctp_chunk 152 0 78 3879 0 254 11856 0
kenv 258 15 30 1032 0 30 11610 0
unpcb 256 14 31 1217 0 254 11520 0

malloc-8192 8192 1 0 1 0 1 8192 0

malloc-2048 2048 2 2 2 0 8 8192 0
malloc-1024 1024 2 6 12 0 16 8192 0
malloc-1024 1024 1 7 17 0 16 8192 0
malloc-512 512 3 13 115 0 30 8192 0
malloc-512 512 4 12 4 0 30 8192 0
malloc-512 512 8 8 8 0 30 8192 0

rtentry 176 30 16 34 0 62 8096 0

PGRP 88 28 64 49 0 126 8096 0
ertt_txseginfo 40 1 201 259 0 254 8080 0
rl_entry 40 42 160 42 0 254 8080 0
sctp_laddr 48 0 168 12 0 254 8064 0
udpcb 32 6 246 170 0 254 8064 0
malloc-64 64 12 114 98 0 254 8064 0
malloc-64 64 19 107 24 0 254 8064 0
malloc-32 32 138 114 188 0 254 8064 0
malloc-32 32 25 227 53 0 254 8064 0
malloc-32 32 38 214 814 0 254 8064 0
4 Bucket 48 7 161 135 0 254 8064 0
2 Bucket 32 51 201 890 0 254 8064 0
malloc-16 16 5 495 14 0 254 8000 0
malloc-16 16 16 484 19 0 254 8000 0

malloc-16 16 187 313 1417 0 254 8000 0

malloc-16 16 27 473 25178 0 254 8000 0
malloc-16 16 9 491 15565 0 254 8000 0
ripcb 496 3 13 6 0 254 7936 0
malloc-128 128 25 37 124 0 126 7936 0
malloc-128 128 10 52 25 0 126 7936 0

routing nhops 256 27 3 34 0 62 7680 0
malloc-384 384 1 19 349 0 30 7680 0

tcpcb 1080 3 4 7 0 254 7560 0

FPU_save_area 832 1 8 1 0 16 7488 0
cpuset 104 7 55 7 0 126 6448 0
epoch_record pcpu 256 4 12 4 0 62 4096 0
malloc-2048 2048 1 1 1 0 8 4096 0

malloc-512 512 1 7 2 0 30 4096 0

pcpu-16 16 7 249 7 0 254 4096 0

hostcache 64 1 62 1 0 254 4032 0

syncache 168 0 24 5 0 254 4032 0
ertt 72 3 53 7 0 126 4032 0
tcp_inpcb 496 3 5 7 0 254 3968 0
UMA Slabs 1 176 9 13 9 0 62 3872 0
malloc-384 384 1 9 2 0 30 3840 0

mqnode 416 3 6 3 0 30 3744 0
KMAP ENTRY 96 12 27 14 0 0 3744 0
vmem 1856 1 1 1 0 8 3712 0
SMR CPU 32 3 60 3 0 254 2016 0
SMR SHARED 24 3 60 3 0 254 1512 0
FFS1 dinode 128 0 0 0 0 126 0 0
da_ccb 544 0 0 0 0 16 0 0
ada_ccb 272 0 0 0 0 30 0 0
swblk 136 0 0 0 0 62 0 0
swpctrie 144 0 0 0 0 62 0 0

cdg_qdiffsample 16 0 0 0 0 254 0 0

sctp_asconf_ack 48 0 0 0 0 254 0 0

sctp_asconf 40 0 0 0 0 254 0 0

sctp_stream_msg_out 112 0 0 0 0 254 0 0
sctp_readq 152 0 0 0 0 254 0 0

pf state scrubs 40 0 0 0 0 254 0 0
pf frag entries 40 0 0 0 0 254 0 0
pf frags 248 0 0 0 0 62 0 0
pf table entries 160 0 0 0 0 62 0 0
pf table entry counters 64 0 0 0 0 254 0 0
pf source nodes 136 0 0 0 0 254 0 0
pf state keys 88 0 0 0 0 126 0 0
pf states 304 0 0 0 0 254 0 0
pf tags 104 0 0 0 0 126 0 0
pf mtags 48 0 0 0 0 254 0 0

tcp_bbr_pcb 832 0 0 0 0 16 0 0
tcp_bbr_map 128 0 0 0 0 126 0 0
tcp_rack_pcb 832 0 0 0 0 16 0 0
tcp_rack_map 112 0 0 0 0 126 0 0
udplite_inpcb 496 0 0 0 0 254 0 0
tcp_log_node 120 0 0 0 0 126 0 0
tcp_log_bucket 176 0 0 0 0 62 0 0
tcp_log 416 0 0 0 0 254 0 0

tcpreass 48 0 0 0 0 254 0 0
tfo_ccache_entries 80 0 0 0 0 126 0 0
tfo 4 0 0 0 0 254 0 0
sackhole 32 0 0 0 0 254 0 0

tcptw 88 0 0 0 0 254 0 0

ipq 56 0 0 0 0 254 0 0
IPsec SA lft_c 16 0 0 0 0 254 0 0
itimer 352 0 0 0 0 30 0 0

AIOLIO 272 0 0 0 0 30 0 0
AIOCB 552 0 0 0 0 16 0 0
AIOP 32 0 0 0 0 254 0 0
AIO 208 0 0 0 0 62 0 0

mqnotifier 216 0 0 0 0 62 0 0

mvdata 64 0 0 0 0 254 0 0
mqueue 248 0 0 0 0 62 0 0

TMPFS node 224 0 0 0 0 62 0 0

NCLNODE 584 0 0 0 0 16 0 0
LTS VFS Cache 360 0 0 0 0 30 0 0
L VFS Cache 320 0 0 0 0 30 0 0
STS VFS Cache 144 0 0 0 0 62 0 0
cryptop 280 0 0 0 0 30 0 0
linux_dma_object 24 0 0 0 0 254 0 0
linux_dma_pctrie 144 0 0 0 0 62 0 0
IOMMU_MAP_ENTRY 120 0 0 0 0 126 0 0
ktls_session 192 0 0 0 0 62 0 0
mbuf_jumbo_16k 16384 0 0 0 0 254 0 0
mbuf_jumbo_9k 9216 0 0 0 0 254 0 0
audit_record 1280 0 0 0 0 8 0 0
domainset 40 0 0 0 0 254 0 0
MAC labels 40 0 0 0 0 254 0 0
vnpbuf 2624 0 0 0 0 64 0 0
mdpbuf 2624 0 0 0 0 3 0 0
nfspbuf 2624 0 0 0 0 16 0 0
swwbuf 2624 0 0 0 0 8 0 0
swrbuf 2624 0 0 0 0 16 0 0
umtx_shm 88 0 0 0 0 126 0 0
umtx pi 96 0 0 0 0 126 0 0
rangeset pctrie nodes 144 0 0 0 0 62 0 0
malloc-65536 65536 0 0 0 0 1 0 0
malloc-65536 65536 0 0 0 0 1 0 0
malloc-32768 32768 0 0 0 0 1 0 0
malloc-32768 32768 0 0 0 0 1 0 0
malloc-32768 32768 0 0 0 0 1 0 0
malloc-32768 32768 0 0 0 0 1 0 0
malloc-32768 32768 0 0 0 0 1 0 0
malloc-16384 16384 0 0 0

syzbot

unread,

Jul 14, 2021, 8:02:21 AM7/14/21

to syzkaller-f...@googlegroups.com

syzbot has found a reproducer for the following issue on:

HEAD commit: d411b285 pmap: Micro-optimize pmap_remove_pages() on amd64..

git tree: https://github.com/freebsd/freebsd-src.git main

console output: https://syzkaller.appspot.com/x/log.txt?x=15c8486c300000
dashboard link: https://syzkaller.appspot.com/bug?extid=d9a004cd64d2b3cff518
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1691b9b0300000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10a9fa6c300000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d9a004...@syzkaller.appspotmail.com

panic: ASan: Invalid access, 8-byte read at 0xfffffe009eb06480, UMAUseAfterFree(fd)
cpuid = 0
time = 1626263638
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc7/frame 0xfffffe009bf14130
kdb_backtrace() at kdb_backtrace+0xd3/frame 0xfffffe009bf14290
vpanic() at vpanic+0x2c5/frame 0xfffffe009bf14370
panic() at panic+0xb5/frame 0xfffffe009bf14430
__asan_load8_noabort() at __asan_load8_noabort+0x36f/frame 0xfffffe009bf144f0
__mtx_lock_flags() at __mtx_lock_flags+0x122/frame 0xfffffe009bf145e0
sctp_endpoint_probe() at sctp_endpoint_probe+0xce/frame 0xfffffe009bf14650
sctp_inpcb_bind() at sctp_inpcb_bind+0x99a/frame 0xfffffe009bf14790
sctp6_bind() at sctp6_bind+0x171/frame 0xfffffe009bf14880
sobind() at sobind+0xd5/frame 0xfffffe009bf148d0
kern_bindat() at kern_bindat+0x25e/frame 0xfffffe009bf149b0
sys_bind() at sys_bind+0xfb/frame 0xfffffe009bf149f0
amd64_syscall() at amd64_syscall+0x425/frame 0xfffffe009bf14bf0
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe009bf14bf0
--- syscall (0, FreeBSD ELF64, nosys), rip = 0x2ba51a, rsp = 0x7fffdfffdf68, rbp = 0x7fffdfffdf70 ---
KDB: enter: panic
[ thread pid 3762 tid 104027 ]
Stopped at kdb_enter+0x6b: movq $0,0x28e6eea(%rip)

db>
db> set $lines = 0
db> set $maxwidth = 0
db> show registers
cs 0x20
ds 0x3b
es 0x3b
fs 0x13
gs 0x1b
ss 0x28
rax 0x12

rcx 0xa43aa96f22fa6fe0
rdx 0xdffff7c000000000
rbx 0
rsp 0xfffffe009bf14270
rbp 0xfffffe009bf14290
rsi 0x1
rdi 0xffffffff8408c1c0 cov_trace_pc
r8 0x3
r9 0xfffffe009bf13dc8
r10 0
r11 0xfffffe009ea0f6f0
r12 0xfffffe009ea0f1e0
r13 0xfffffe009bf14201
r14 0xffffffff82c68b40 .str.18
r15 0xffffffff82c68b40 .str.18
rip 0xffffffff817a7c4b kdb_enter+0x6b
rflags 0x46
kdb_enter+0x6b: movq $0,0x28e6eea(%rip)
db> show proc
Process 3762 (syz-executor8482033) at 0xfffffe009ea24000:

state: NORMAL
uid: 0 gids: 0, 0, 5

parent: pid 789 at 0xfffffe0058920538

ABI: FreeBSD ELF64
flag: 0x10000080 flag2: 0

arguments: ./syz-executor848203363

reaper: 0xfffffe0053d51538 reapsubtree: 1
sigparent: 20

vmspace: 0xfffffe009e98c9f0
(map 0xfffffe009e98c9f0)
(map.pmap 0xfffffe009e98cab0)
(pmap 0xfffffe009e98cb10)
threads: 2
102398 RunQ syz-executor8482033
104027 Run CPU 0 syz-executor8482033

db> ps
pid ppid pgrp uid state wmesg wchan cmd

3762 789 786 0 R (threaded) syz-executor8482033
102398 RunQ syz-executor8482033
104027 Run CPU 0 syz-executor8482033
3761 791 786 0 T (threaded) syz-executor8482033
100090 s syz-executor8482033
104019 RunQ syz-executor8482033
104024 RunQ syz-executor8482033
104026 RunQ syz-executor8482033
3760 790 786 0 RE syz-executor8482033
3759 793 786 0 T (threaded) syz-executor8482033
100110 s syz-executor8482033
104016 RunQ syz-executor8482033
104021 RunQ syz-executor8482033
793 788 786 0 S wait 0xfffffe0058afd538 syz-executor8482033
791 788 786 0 S wait 0xfffffe0058afda70 syz-executor8482033
790 788 786 0 S wait 0xfffffe0058b18000 syz-executor8482033
789 788 786 0 R syz-executor8482033
788 786 786 0 S nanslp 0xffffffff8405ba01 syz-executor8482033
786 784 786 0 Ss pause 0xfffffe0058888b20 csh
784 694 784 0 Ss select 0xfffffe009e4206c0 sshd
760 1 760 0 Ss+ ttyin 0xfffffe0056fe1cb0 getty
759 1 759 0 Ss+ ttyin 0xfffffe00583ed0b0 getty
758 1 758 0 Ss+ ttyin 0xfffffe00583ed4b0 getty
757 1 757 0 Ss+ ttyin 0xfffffe00583ed8b0 getty
756 1 756 0 Ss+ ttyin 0xfffffe00583edcb0 getty
755 1 755 0 Ss+ ttyin 0xfffffe00583950b0 getty
754 1 754 0 Ss+ ttyin 0xfffffe00583954b0 getty
753 1 753 0 Ss+ ttyin 0xfffffe00583958b0 getty
752 1 752 0 Ss+ ttyin 0xfffffe0058395cb0 getty
698 1 698 0 Ss nanslp 0xffffffff8405ba01 cron
694 1 694 0 Ss select 0xfffffe009e4202c0 sshd
507 1 507 0 Ss select 0xfffffe00589285c0 syslogd
436 1 436 0 Ss select 0xfffffe00589284c0 devd
435 1 435 65 Ss select 0xfffffe009e420740 dhclient
350 1 350 0 Ss select 0xfffffe00589283c0 dhclient
347 1 347 0 Ss select 0xfffffe0058928740 dhclient
23 0 0 0 DL syncer 0xffffffff84181b40 [syncer]
22 0 0 0 DL vlruwt 0xfffffe005877fa70 [vnlru]

21 0 0 0 DL (threaded) [bufdaemon]

100083 D qsleep 0xffffffff8417fa40 [bufdaemon]

100084 D - 0xffffffff83411f80 [bufspacedaemon-0]

100097 D sdflush 0xfffffe005893fce8 [/ worker]
20 0 0 0 DL psleep 0xffffffff841b7dc0 [vmdaemon]

19 0 0 0 DL (threaded) [pagedaemon]

100081 D psleep 0xffffffff841ab8f8 [dom0]
100087 D launds 0xffffffff841ab904 [laundry: dom0]
100088 D umarcl 0xffffffff81e9dc30 [uma]
18 0 0 0 DL - 0xffffffff83e12ba0 [rand_harvestq]
17 0 0 0 DL waiting 0xffffffff849ea460 [sctp_iterator]
16 0 0 0 DL pftm 0xffffffff84c52d30 [pf purge]
15 0 0 0 DL - 0xffffffff8417aec0 [soaiod4]
9 0 0 0 DL - 0xffffffff8417aec0 [soaiod3]
8 0 0 0 DL - 0xffffffff8417aec0 [soaiod2]
7 0 0 0 DL - 0xffffffff8417aec0 [soaiod1]

6 0 0 0 DL (threaded) [cam]

100046 D - 0xffffffff83c98240 [doneq0]
100047 D - 0xffffffff83c981c0 [async]
100080 D - 0xffffffff83c98040 [scanner]
14 0 0 0 DL seqstat 0xfffffe0056ab1c88 [sequencer 00]
5 0 0 0 DL crypto_ 0xfffffe00541aed80 [crypto returns 1]
4 0 0 0 DL crypto_ 0xfffffe00541aed30 [crypto returns 0]
3 0 0 0 DL crypto_ 0xffffffff841a59a0 [crypto]

13 0 0 0 DL (threaded) [geom]

100037 D - 0xffffffff8402efc0 [g_event]
100038 D - 0xffffffff8402f000 [g_up]
100039 D - 0xffffffff8402f040 [g_down]

10 0 0 0 DL audit_w 0xffffffff841a6940 [audit]

0 0 0 0 RLs (threaded) [kernel]

100000 D swapin 0xffffffff8402fec0 [swapper]

100005 D - 0xfffffe0053c0d800 [softirq_0]
100006 D - 0xfffffe0053c0d600 [softirq_1]
100007 D - 0xfffffe0053c0d400 [if_io_tqg_0]
100008 D - 0xfffffe0053c0d200 [if_io_tqg_1]
100009 D - 0xfffffe0053c0d000 [if_config_tqg_0]

100012 Run CPU 1 [thread taskq]
100013 D - 0xfffffe000791b400 [inm_free taskq]
100015 D - 0xfffffe000791b200 [kqueue_ctx taskq]
100016 D - 0xfffffe000791b100 [linuxkpi_irq_wq]
100017 D - 0xfffffe000791b000 [aiod_kick taskq]

100062 D vtbslp 0xfffffe0056fbc300 [virtio_balloon]

100066 D - 0xfffffe0053df6300 [mca taskq]

100071 D - 0xffffffff82c6fac0 [deadlkres]
100075 D - 0xfffffe0058392e00 [acpi_task_0]
100076 D - 0xfffffe0058392e00 [acpi_task_1]
100077 D - 0xfffffe0058392e00 [acpi_task_2]

100079 D - 0xfffffe0053df6800 [CAM taskq]
db> show all locks

Process 3762 (syz-executor8482033) thread 0xfffffe009ea0f1e0 (104027)
exclusive rw sctp-info (sctp-info) r = 0 (0xfffffe00081ab308) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:2918
Process 3759 (syz-executor8482033) thread 0xfffffe009ea0f900 (104021)
exclusive sleep mutex sctp-create (inp_create) r = 0 (0xfffffe009eb07988) locked @ /syzkaller/managers/main/kernel/sys/netinet6/sctp6_usrreq.c:870

Process 0 (kernel) thread 0xfffffe0053df21e0 (100012)

exclusive sleep mutex kernel arena (kernel arena) r = 0 (0xffffffff840b0680) locked @ /syzkaller/managers/main/kernel/sys/kern/subr_vmem.c:789

kobj 327 1308K 487
newblk 132 1057K 3693
vfscache 3 1025K 3
inodedep 775 803K 3046
pcb 31 546K 11925

ufs_quota 1 512K 1
vfs_hash 1 512K 1
callout 2 512K 2
intr 4 472K 4

subproc 118 230K 3830
dirrem 765 192K 2994
acpica 1674 184K 54844
vnet_data 1 168K 1
vmem 3 146K 4
tidhash 3 141K 3
linker 357 140K 385
pagedep 10 131K 2993
tfo_ccache 1 128K 1
sem 4 106K 4
DEVFS1 103 103K 112
freefile 765 96K 2992
sctp_stro 1 92K 8871
bus 989 81K 3482

mtx_pool 2 72K 2
syncache 1 68K 1

sctp_timw 264 66K 264

acpitask 1 64K 1
ddb_capture 1 64K 1

module 511 64K 511
umtx 308 39K 308
kdtrace 189 38K 7791
temp 18 33K 1631
hostcache 1 32K 1
shm 1 32K 1
DEVFS3 122 31K 132

msg 4 30K 4
gtaskqueue 18 26K 18
kbdmux 6 22K 6

DEVFS_RULE 56 20K 56
BPF 10 18K 10

ufs_mount 5 17K 6
proc 3 17K 3

tty 16 16K 16
ithread 99 16K 99

bus-sc 33 14K 1694
KTRACE 100 13K 100

kenv 95 12K 95
eventhandler 133 12K 133

ifaddr 30 12K 32
routetbl 50 11K 176

CAM queue 5 11K 1528
rman 84 10K 425
GEOM 60 10K 489

bmsafemap 2 9K 3016

UART 12 9K 12
devstat 4 9K 4

ksem 1 8K 1

rpc 2 8K 2
shmfd 1 8K 1
pfs_vncache 1 8K 1

pfs_nodes 20 8K 20
audit_evclass 236 8K 294
taskqueue 60 7K 60
sglist 5 7K 5

CAM DEV 3 6K 510

cred 22 6K 244

ufs_dirhash 24 5K 24
UMA 270 5K 270

vt 11 5K 11
ifnet 3 5K 3

memdesc 1 4K 1
MCA 32 4K 32

plimit 16 4K 338
evdev 4 4K 4
filedesc 1 4K 1
acpisem 28 4K 28
hhook 15 4K 17
kqueue 51 4K 3765
ether_multi 40 4K 50
lltable 11 4K 11
pwddesc 50 4K 3763
pf_ifnet 5 3K 6
fpukern_ctx 3 3K 3
in6_multi 25 3K 25
terminal 11 3K 11
session 19 3K 32
sctp_atcl 6 3K 14795
uidinfo 3 3K 9

local_apic 1 2K 1
io_apic 1 2K 1
ipsec-saq 2 2K 2

selfd 27 2K 48372
lockf 16 2K 26
Unitno 27 2K 39

CAM XPT 22 2K 543

proc-args 36 2K 494
mkdir 12 2K 5964

ipsecpolicy 2 2K 2
acpidev 20 2K 20
msi 9 2K 9
clone 9 2K 9

freework 5 2K 2992
softdep 1 1K 1
newdirblk 8 1K 2982
diradd 8 1K 3010
freeblks 4 1K 2991

sahead 1 1K 1
secasvar 1 1K 1

vnodemarker 2 1K 40

NFSD session 1 1K 1
CAM periph 4 1K 271

select 7 1K 29
ipsec 3 1K 3
nhops 6 1K 6

toponodes 6 1K 6
isadev 6 1K 6
mount 16 1K 89
pci_link 10 1K 10

sctp_ifa 5 1K 6
crypto 4 1K 4
ip6ndp 4 1K 5
encap_export_host 12 1K 12
sctp_stri 1 1K 5926
in_multi 2 1K 4

pfil 4 1K 4
cdev 2 1K 2

chacha20random 1 1K 1
osd 7 1K 18
inpcbpolicy 10 1K 137
sctp_atky 7 1K 23666
sctp_ifn 2 1K 6

NFSD lckfile 1 1K 1
NFSD V4client 1 1K 1

DEVFSP 4 1K 9
DEVFS 9 1K 10
indirdep 1 1K 3
mld 2 1K 2
igmp 2 1K 2
vnodes 1 1K 1

CAM SIM 2 1K 2
ktls 1 1K 1
feeder 7 1K 7

tcpfunc 3 1K 3
loginclass 3 1K 7

prison 6 1K 6
lkpikmalloc 5 1K 6

soname 6 1K 15300
aesni_data 2 1K 2

apmdev 1 1K 1
atkbddev 2 1K 2
CAM dev queue 2 1K 2

xform 2 1K 49

CAM I/O Scheduler 1 1K 1
CAM path 4 1K 1034

procdesc 1 1K 6

pmchooks 1 1K 1
nexusdev 7 1K 7

sctp_athm 6 1K 17758
tun 3 1K 3
sctp_vrf 1 1K 1
vnet 1 1K 1
entropy 2 1K 39

acpiintr 1 1K 1
pmc 1 1K 1

sctp_socko 2 1K 5924
sctp_map 2 1K 11816

cpus 2 1K 2
vnet_data_free 1 1K 1
Per-cpu 1 1K 1
p1003.1b 1 1K 1

filecaps 1 1K 66
cdg data 0 0K 0
htcp data 0 0K 0

dctcp data 0 0K 0

pf_table 0 0K 0
pf_rule 0 0K 0
pf_altq 0 0K 0

pf_osfp 0 0K 0
pf_temp 0 0K 0

cubic data 0 0K 0

chd data 0 0K 0

vegas data 0 0K 0

sctp_mcore 0 0K 0
sctp_iter 0 0K 4
sctp_mvrf 0 0K 0
sctp_cpal 0 0K 0

sctp_cmsg 0 0K 0
sctp_stre 0 0K 0
sctp_athi 0 0K 0

sctp_a_it 0 0K 4
sctp_aadr 0 0K 0
tcp_do 0 0K 0
tcp_fsb 0 0K 0
mqdata 0 0K 0

savedino 0 0K 1118

sentinel 0 0K 0
jfsync 0 0K 0
jtrunc 0 0K 0

sbdep 0 0K 8

jsegdep 0 0K 0
jseg 0 0K 0
jfreefrag 0 0K 0
jfreeblk 0 0K 0
jnewblk 0 0K 0
jmvref 0 0K 0
jremref 0 0K 0
jaddref 0 0K 0
freedep 0 0K 0

freefrag 0 0K 1
allocindir 0 0K 0

ip6opt 0 0K 3
ip6_msource 0 0K 0
ip6_moptions 0 0K 0
in6_mfilter 0 0K 0

frag6 0 0K 0
tcplog 0 0K 0
tcp_hwpace 0 0K 0
acpipwr 0 0K 0
acpi_perf 0 0K 0
LRO 0 0K 0
newreno data 0 0K 0

ip_msource 0 0K 0
ip_moptions 0 0K 0
in_mfilter 0 0K 0

fadvise 0 0K 0
VN POLL 0 0K 0

twsbuf 0 0K 0
statfs 0 0K 3171

namei_tracker 0 0K 0
export_host 0 0K 0

cl_savebuf 0 0K 3

twe_commands 0 0K 0
twa_commands 0 0K 0

tcp_log_dev 0 0K 0

midi buffers 0 0K 0
mixer 0 0K 0
ac97 0 0K 0
hdacc 0 0K 0
hdac 0 0K 0
hdaa 0 0K 0
acpicmbat 0 0K 0
SIIS driver 0 0K 0

CAM CCB 0 0K 1948

PUC 0 0K 0
ppbusdev 0 0K 0
agtiapi_MemAlloc malloc 0 0K 0
biobuf 0 0K 0
aios 0 0K 0

lio 0 0K 0

acl 0 0K 0
osti_cacheable 0 0K 0

mbuf_tag 0 0K 27

iov 0 0K 13666
ioctlops 0 0K 86
eventfd 0 0K 0

sysctltmp 0 0K 655

sysctl 0 0K 3
ekcd 0 0K 0
dumper 0 0K 0
sendfile 0 0K 0
rctl 0 0K 0
ix_sriov 0 0K 0
aacraidcam 0 0K 0
aacraid_buf 0 0K 0
ix 0 0K 0
ipsbuf 0 0K 0
cache 0 0K 0
iirbuf 0 0K 0

kcovinfo 0 0K 0

prison_racct 0 0K 0
Fail Points 0 0K 0
sigio 0 0K 1

mbuf_jumbo_page 4096 8320 990 16178 0 254 38133760 0

pbuf 2624 0 989 0 0 2 2595136 0

mbuf 256 8578 992 111239 0 254 2449920 0
BUF TRIE 144 181 11579 620 0 62 1693440 0
malloc-384 384 4187 13 4187 0 30 1612800 0
malloc-128 128 11300 46 11383 0 126 1452288 0
malloc-4096 4096 327 2 491 0 2 1347584 0
UMA Slabs 0 112 10202 19 10202 0 126 1144752 0
vmem btag 56 15935 24 15935 0 254 893704 0
FFS inode 1160 494 24 3486 0 8 600880 0
RADIX NODE 144 3141 354 78203 0 63 503280 0
malloc-384 384 774 366 3045 0 30 437760 0

lkpimm 160 1 2324 1 0 62 372000 0
lkpicurr 160 2 2323 2 0 62 372000 0

malloc-256 256 990 420 12983 0 62 360960 0
malloc-256 256 150 1125 8463 0 62 326400 0
THREAD 1808 137 17 4027 0 8 278432 0
VNODE 448 524 79 3518 0 30 270144 0
malloc-64 64 4090 131 52686 0 254 270144 0

malloc-65536 65536 4 0 4 0 1 262144 0

256 Bucket 2048 120 8 11025 0 8 262144 0
VM OBJECT 264 934 56 49352 0 30 261360 0
malloc-4096 4096 58 4 4302 0 2 253952 0
malloc-16 16 14035 215 31842 0 254 228000 0
DEVCTL 1024 0 220 125 0 0 225280 0
mbuf_cluster 2048 105 1 105 0 254 217088 0
malloc-128 128 1057 431 3430 0 126 190464 0

UMA Zones 768 242 2 242 0 16 187392 0

malloc-32 32 5360 184 5527 0 254 177408 0
malloc-128 128 1252 50 31947 0 126 166656 0
malloc-2048 2048 4 66 511 0 8 143360 0
malloc-128 128 1032 53 7973 0 126 138880 0
sctp_ep 1280 4 104 5924 0 254 138240 0
S VFS Cache 104 981 345 3985 0 126 137904 0

malloc-65536 65536 2 0 2 0 1 131072 0

malloc-65536 65536 0 2 182 0 1 131072 0

malloc-65536 65536 2 0 2 0 1 131072 0

FFS2 dinode 256 494 16 3486 0 62 130560 0
sctp_asoc 2288 1 54 5908 0 254 125840 0
ksiginfo 112 50 994 82 0 126 116928 0
malloc-1024 1024 106 6 115 0 16 114688 0
MAP ENTRY 96 889 287 87663 0 126 112896 0
malloc-2048 2048 7 45 1955 0 8 106496 0

malloc-16384 16384 4 2 179 0 1 98304 0

VMSPACE 2544 28 8 3741 0 4 91584 0

UMA Kegs 384 227 6 227 0 30 89472 0

PROC 1336 50 16 3762 0 8 88176 0
malloc-256 256 285 45 6464 0 62 84480 0

malloc-8192 8192 5 5 134 0 1 81920 0

socket 944 25 59 7252 0 254 79296 0
filedesc0 1072 51 19 3763 0 8 75040 0
g_bio 408 0 170 5200 0 30 69360 0
malloc-65536 65536 1 0 1 0 1 65536 0

malloc-65536 65536 0 1 8 0 1 65536 0

malloc-32768 32768 0 2 130 0 1 65536 0

malloc-32768 32768 2 0 2 0 1 65536 0

128 Bucket 1024 48 15 987 0 16 64512 0
64 Bucket 512 78 34 2037 0 30 57344 0

malloc-4096 4096 12 1 23 0 2 53248 0

32 Bucket 256 64 131 3899 0 62 49920 0

malloc-16384 16384 3 0 3 0 1 49152 0
malloc-8192 8192 6 0 6 0 1 49152 0

malloc-2048 2048 6 18 5928 0 8 49152 0
sctp_raddr 736 1 65 5908 0 254 48576 0
malloc-1024 1024 8 36 6424 0 16 45056 0
malloc-64 64 563 130 18691 0 254 44352 0
clpbuf 2624 0 16 25 0 16 41984 0

DIRHASH 1024 34 6 34 0 16 40960 0

malloc-8192 8192 5 0 5 0 1 40960 0

malloc-256 256 132 18 151 0 62 38400 0
malloc-256 256 105 45 961 0 62 38400 0
NAMEI 1024 0 36 24211 0 16 36864 0

malloc-4096 4096 9 0 9 0 2 36864 0

pcpu-8 8 4229 379 4257 0 254 36864 0
malloc-384 384 74 16 103 0 30 34560 0

malloc-32768 32768 1 0 1 0 1 32768 0

malloc-8192 8192 4 0 4 0 1 32768 0

pcpu-64 64 487 25 487 0 254 32768 0

malloc-64 64 479 25 691 0 254 32256 0
malloc-1024 1024 13 15 1095 0 16 28672 0
mbuf_packet 256 0 105 35720 0 254 26880 0
malloc-384 384 6 64 14795 0 30 26880 0
TURNSTILE 136 155 34 155 0 62 25704 0

malloc-8192 8192 2 1 4 0 1 24576 0

malloc-512 512 1 47 5927 0 30 24576 0
ertt_txseginfo 40 1 605 3185 0 254 24240 0
PWD 32 17 739 3074 0 254 24192 0

ttyinq 160 135 15 300 0 62 24000 0

malloc-4096 4096 3 2 3175 0 2 20480 0
malloc-2048 2048 8 2 199 0 8 20480 0

malloc-1024 1024 17 3 17 0 16 20480 0

malloc-64 64 21 294 12416 0 254 20160 0
malloc-32 32 283 347 16024 0 254 20160 0
malloc-128 128 7 148 261 0 126 19840 0

Mountpoints 2752 2 5 2 0 4 19264 0

ttyoutq 256 72 3 160 0 62 19200 0

malloc-384 384 36 14 36 0 30 19200 0

pipe 744 6 19 286 0 16 18600 0
SLEEPQUEUE 88 155 37 155 0 126 16896 0
malloc-16384 16384 1 0 1 0 1 16384 0

malloc-8192 8192 2 0 2 0 1 16384 0

malloc-4096 4096 2 2 95 0 2 16384 0
malloc-2048 2048 4 4 81 0 8 16384 0

malloc-1024 1024 11 5 11 0 16 16384 0

malloc-64 64 142 110 7626 0 254 16128 0
vtnet_tx_hdr 24 0 668 5335 0 254 16032 0
8 Bucket 80 53 147 1156 0 126 16000 0
malloc-128 128 81 43 3074 0 126 15872 0
malloc-256 256 32 28 673 0 62 15360 0
tcpcb 1080 3 11 7 0 254 15120 0

malloc-1024 1024 8 4 9 0 16 12288 0

malloc-512 512 10 14 196 0 30 12288 0
malloc-64 64 146 43 149 0 254 12096 0
malloc-32 32 27 351 12391 0 254 12096 0
16 Bucket 144 38 46 257 0 62 12096 0
Files 80 74 76 15512 0 126 12000 0
malloc-16 16 326 424 560 0 254 12000 0
udp_inpcb 496 6 18 126 0 254 11904 0
sctp_chunk 152 2 76 5926 0 254 11856 0
kenv 258 15 30 1026 0 30 11610 0
malloc-384 384 19 11 21 0 30 11520 0
malloc-256 256 14 31 137 0 62 11520 0
malloc-256 256 18 27 3049 0 62 11520 0

malloc-8192 8192 1 0 1 0 1 8192 0

malloc-2048 2048 3 1 12 0 8 8192 0
malloc-2048 2048 2 2 2 0 8 8192 0
malloc-1024 1024 2 6 10 0 16 8192 0
malloc-1024 1024 1 7 17 0 16 8192 0
malloc-512 512 3 13 41 0 30 8192 0
malloc-512 512 4 12 4 0 30 8192 0
rtentry 176 13 33 17 0 62 8096 0
PGRP 88 19 73 32 0 126 8096 0
rl_entry 40 34 168 34 0 254 8080 0
sctp_laddr 48 0 168 4 0 254 8064 0
syncache 168 0 48 5 0 254 8064 0
udpcb 32 6 246 126 0 254 8064 0
ertt 72 3 109 7 0 126 8064 0
malloc-64 64 11 115 64 0 254 8064 0
malloc-64 64 7 119 12 0 254 8064 0
malloc-32 32 42 210 92 0 254 8064 0
malloc-32 32 140 112 250 0 254 8064 0
malloc-32 32 17 235 41 0 254 8064 0
malloc-32 32 38 214 740 0 254 8064 0
4 Bucket 48 6 162 116 0 254 8064 0
2 Bucket 32 44 208 525 0 254 8064 0
malloc-16 16 5 495 13 0 254 8000 0
malloc-16 16 188 312 1428 0 254 8000 0
malloc-16 16 25 475 25115 0 254 8000 0
malloc-16 16 14 486 17789 0 254 8000 0
tcp_inpcb 496 3 13 7 0 254 7936 0
malloc-128 128 22 40 70 0 126 7936 0
malloc-128 128 12 50 18 0 126 7936 0
routing nhops 256 10 20 17 0 62 7680 0
unpcb 256 7 23 1172 0 254 7680 0

malloc-384 384 1 19 349 0 30 7680 0

FPU_save_area 832 1 8 1 0 16 7488 0
cpuset 104 7 55 7 0 126 6448 0
epoch_record pcpu 256 4 12 4 0 62 4096 0

malloc-4096 4096 1 0 1 0 2 4096 0

malloc-2048 2048 1 1 1 0 8 4096 0

malloc-512 512 1 7 2 0 30 4096 0

malloc-512 512 4 4 4 0 30 4096 0
pcpu-16 16 7 249 7 0 254 4096 0

hostcache 64 1 62 1 0 254 4032 0

KNOTE 160 0 25 8 0 62 4000 0
malloc-16 16 12 238 15 0 254 4000 0
ripcb 496 1 7 4 0 254 3968 0
UMA Slabs 1 176 8 14 8 0 62 3872 0
malloc-384 384 1 9 2 0 30 3840 0

cdg_qdiffsample 16 0 0 0 0 254 0 0

sctp_asconf_ack 48 0 0 0 0 254 0 0

sctp_asconf 40 0 0 0 0 254 0 0

sctp_stream_msg_out 112 0 0 0 0 254 0 0
sctp_readq 152 0 0 0 0 254 0 0

tcpreass 48 0 0 0 0 254 0 0
tfo_ccache_entries 80 0 0 0 0 126 0 0
tfo 4 0 0 0 0 254 0 0
sackhole 32 0 0 0 0 254 0 0

tcptw 88 0 0 0 0 254 0 0

ipq 56 0 0 0 0 254 0 0
IPsec SA lft_c 16 0 0 0 0 254 0 0
itimer 352 0 0 0 0 30 0 0

AIOLIO 272 0 0 0 0 30 0 0
AIOCB 552 0 0 0 0 16 0 0
AIOP 32 0 0 0 0 254 0 0
AIO 208 0 0 0 0 62 0 0

TMPFS node 224 0 0 0 0 62 0 0

NCLNODE 584 0 0 0 0 16 0 0

mqnotifier 216 0 0 0 0 62 0 0

mvdata 64 0 0 0 0 254 0 0
mqueue 248 0 0 0 0 62 0 0

malloc-16384 16384 0 0 0 0 1 0 0
malloc-16384 16384 0 0 0 0 1 0 0
malloc-16384 16384 0 0 0 0 1 0 0
malloc-16384 16384 0 0 0 0 1 0 0
malloc-16384 16384 0 0 0 0 1 0 0
malloc-8192 8192 0 0 0 0 1 0 0
malloc-4096 4096 0 0 0 0 2 0 0
malloc-512 512 0 0 0 0 30 0 0
malloc-512

Mark Johnston

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Sep 7, 2021, 7:42:07 PM9/7/21

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#syz dup: panic: Bad list head ADDR first->prev != head

The reproducers look like they are triggering the sctp_bind() race.
Close this one so that new reproducers may be found.

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