panic: Bad tailq NEXT(ADDR->tqh_last) != NULL (2)

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syzbot

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Apr 15, 2020, 6:01:15 PM4/15/20
to syzkaller-f...@googlegroups.com
Hello,

syzbot found the following crash on:

HEAD commit: 20768ae4 Do not attempt to remove backward compatibility t..
git tree: freebsd
console output: https://syzkaller.appspot.com/x/log.txt?x=134c7820100000
dashboard link: https://syzkaller.appspot.com/bug?extid=13f87ee993fc05259035

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

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+13f87e...@syzkaller.appspotmail.com

panic: Bad tailq NEXT(0xfffff80003b20b80->tqh_last) != NULL
cpuid = 1
time = 213
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0025958140
vpanic() at vpanic+0x1c7/frame 0xfffffe00259581a0
panic() at panic+0x43/frame 0xfffffe0025958200
pf_tagname2tag() at pf_tagname2tag+0x2c5/frame 0xfffffe0025958260
pfioctl() at pfioctl+0x6ae3/frame 0xfffffe0025958790
devfs_ioctl() at devfs_ioctl+0x14e/frame 0xfffffe00259587f0
VOP_IOCTL_APV() at VOP_IOCTL_APV+0x78/frame 0xfffffe0025958820
vn_ioctl() at vn_ioctl+0x27c/frame 0xfffffe0025958940
devfs_ioctl_f() at devfs_ioctl_f+0x47/frame 0xfffffe0025958980
kern_ioctl() at kern_ioctl+0x3d4/frame 0xfffffe00259589f0
sys_ioctl() at sys_ioctl+0x266/frame 0xfffffe0025958ac0
amd64_syscall() at amd64_syscall+0x262/frame 0xfffffe0025958bf0
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0025958bf0
--- syscall (198, FreeBSD ELF64, nosys), rip = 0x41332a, rsp = 0x7fffdfffdf38, rbp = 0x3 ---
KDB: enter: panic
[ thread pid 4054 tid 101073 ]
Stopped at kdb_enter+0x67: movq $0,0x14aa046(%rip)
db>
db> set $lines = 0
db> set $maxwidth = 0
db> show registers
cs 0x20
ds 0x3b ll+0x1a
es 0x3b ll+0x1a
fs 0x13
gs 0x1b
ss 0x28 ll+0x7
rax 0x12
rcx 0xfffffe0029e00000
rdx 0x3ffff
rbx 0
rsp 0xfffffe0025958120
rbp 0xfffffe0025958140
rsi 0x40001
rdi 0xffffffff810b85a6 vprintf+0x176
r8 0
r9 0xffffffff
r10 0
r11 0xfffffe0025bd9810
r12 0xffffffff82068e80 ddb_dbbe
r13 0
r14 0xffffffff8194913d
r15 0xffffffff8194913d
rip 0xffffffff810ad827 kdb_enter+0x67
rflags 0x82 ll+0x61
kdb_enter+0x67: movq $0,0x14aa046(%rip)
db> show proc
Process 4054 (syz-executor.1) at 0xfffff8003bd54520:
state: NORMAL
uid: 0 gids: 0, 0, 5
parent: pid 1100 at 0xfffff8003b56ba40
ABI: FreeBSD ELF64
arguments: /root/syz-executor.1
reaper: 0xfffff8000331a000 reapsubtree: 1
sigparent: 20
vmspace: 0xfffffe0025bfb000
(map 0xfffffe0025bfb000)
(map.pmap 0xfffffe0025bfb0c0)
(pmap 0xfffffe0025bfb120)
threads: 3
100399 RunQ syz-executor.1
101073 Run CPU 1 syz-executor.1
101056 Run CPU 0 syz-executor.1
db> ps
pid ppid pgrp uid state wmesg wchan cmd
4054 1100 1100 0 R (threaded) syz-executor.1
100399 RunQ syz-executor.1
101073 Run CPU 1 syz-executor.1
101056 Run CPU 0 syz-executor.1
4048 794 794 0 S (threaded) syz-executor.3
100314 S nanslp 0xffffffff8252c1f0 syz-executor.3
101065 S sbwait 0xfffffe00239c7704 syz-executor.3
101067 S uwait 0xfffff8003b4f4c80 syz-executor.3
101044 S uwait 0xfffff8003b4f4a80 syz-executor.3
1736 1729 1736 0 Ss select 0xfffff80003c047c0 dhclient
1732 1 1732 0 Ss select 0xfffff80003084140 dhclient
1729 1722 424 65 S select 0xfffff80003084040 dhclient
1722 424 424 0 S wait 0xfffff8003b587a40 sh
1713 1 1713 65 Ss select 0xfffff8003b6a92c0 dhclient
1268 1 1268 0 Ss select 0xfffff80003c04a40 dhclient
1265 1 1265 0 Ss select 0xfffff8003b6a9dc0 dhclient
1244 1 1244 65 Ss select 0xfffff8003b6a96c0 dhclient
1100 768 1100 0 Ss nanslp 0xffffffff8252c1f1 syz-executor.1
815 1 815 0 Ss select 0xfffff80003c07040 dhclient
806 1 806 0 Ss select 0xfffff80003c073c0 dhclient
794 768 794 0 Ss nanslp 0xffffffff8252c1f0 syz-executor.3
778 768 778 0 Ss piperd 0xfffff80003ca8be0 syz-executor.2
770 768 770 0 Ss piperd 0xfffff8003ba415f0 syz-executor.0
768 766 766 0 S (threaded) syz-fuzzer
100106 S uwait 0xfffff80003539200 syz-fuzzer
100107 S uwait 0xfffff80003a38300 syz-fuzzer
100108 S uwait 0xfffff80003a38400 syz-fuzzer
100109 S uwait 0xfffff80003a38500 syz-fuzzer
100110 S uwait 0xfffff80003a38600 syz-fuzzer
100111 S uwait 0xfffff80003539300 syz-fuzzer
100112 S uwait 0xfffff8003b4f2300 syz-fuzzer
100113 S uwait 0xfffff80003539400 syz-fuzzer
100114 S uwait 0xfffff80003a38000 syz-fuzzer
100115 S kqread 0xfffff8000320b300 syz-fuzzer
766 764 766 0 Ss pause 0xfffff8003b5710a8 csh
764 682 764 0 Ss select 0xfffff800030840c0 sshd
748 1 748 0 Ss+ ttyin 0xfffff8000356f8b0 getty
747 1 747 0 Ss+ ttyin 0xfffff80003b6fcb0 getty
746 1 746 0 Ss+ ttyin 0xfffff80003b6e4b0 getty
745 1 745 0 Ss+ ttyin 0xfffff80003b6ecb0 getty
744 1 744 0 Ss+ ttyin 0xfffff800033b74b0 getty
743 1 743 0 Ss+ ttyin 0xfffff800033b7cb0 getty
742 1 742 0 Ss+ ttyin 0xfffff800033b64b0 getty
741 1 741 0 Ss+ ttyin 0xfffff800033b6cb0 getty
740 1 740 0 Ss+ ttyin 0xfffff800033b94b0 getty
686 1 686 0 Ss nanslp 0xffffffff8252c1f1 cron
682 1 682 0 Ss select 0xfffff80003084440 sshd
495 1 495 0 Ss select 0xfffff80003c07dc0 syslogd
424 1 424 0 Ss wait 0xfffff80003cc8000 devd
423 1 423 65 Ss select 0xfffff80003c07c40 dhclient
338 1 338 0 Ss select 0xfffff80003c07e40 dhclient
335 1 335 0 Ss select 0xfffff80003c07d40 dhclient
23 0 0 0 DL syncer 0xffffffff82618118 [syncer]
22 0 0 0 DL vlruwt 0xfffff80003b7da40 [vnlru]
21 0 0 0 DL (threaded) [bufdaemon]
100069 D qsleep 0xffffffff82617438 [bufdaemon]
100076 D - 0xffffffff8200aa00 [bufspacedaemon-0]
100088 D sdflush 0xfffff80003c2ace8 [/ worker]
20 0 0 0 DL psleep 0xffffffff8263e3c8 [vmdaemon]
19 0 0 0 DL (threaded) [pagedaemon]
100067 D psleep 0xffffffff82632998 [dom0]
100074 D launds 0xffffffff826329a4 [laundry: dom0]
100075 D umarcl 0xffffffff8154ae00 [uma]
18 0 0 0 DL - 0xffffffff8235fe20 [rand_harvestq]
17 0 0 0 DL pftm 0xffffffff82b533a0 [pf purge]
16 0 0 0 DL waiting 0xffffffff8261a890 [sctp_iterator]
15 0 0 0 DL - 0xffffffff82616a2c [soaiod4]
9 0 0 0 DL - 0xffffffff82616a2c [soaiod3]
8 0 0 0 DL - 0xffffffff82616a2c [soaiod2]
7 0 0 0 DL - 0xffffffff82616a2c [soaiod1]
6 0 0 0 DL (threaded) [cam]
100033 D - 0xffffffff82237b40 [doneq0]
100066 D - 0xffffffff82237a10 [scanner]
5 0 0 0 DL crypto_ 0xfffff8000320cd90 [crypto returns 1]
4 0 0 0 DL crypto_ 0xfffff8000320cd30 [crypto returns 0]
3 0 0 0 DL crypto_ 0xffffffff826300c0 [crypto]
14 0 0 0 DL seqstat 0xfffff80003363488 [sequencer 00]
13 0 0 0 DL (threaded) [geom]
100024 D - 0xffffffff8250b180 [g_event]
100025 D - 0xffffffff8250b188 [g_up]
100026 D - 0xffffffff8250b190 [g_down]
2 0 0 0 DL (threaded) [KTLS]
100017 D - 0xfffff80003084a00 [thr_0]
100018 D - 0xfffff80003084a40 [thr_1]
12 0 0 0 WL (threaded) [intr]
100010 I [swi6: Giant taskq]
100013 I [swi5: fast taskq]
100016 I [swi6: task queue]
100019 I [swi3: vm]
100020 I [swi4: clock (0)]
100021 I [swi4: clock (1)]
100022 I [swi1: netisr 0]
100034 I [irq24: virtio_pci0]
100035 I [irq25: virtio_pci0]
100036 I [irq26: virtio_pci0]
100037 I [irq27: virtio_pci0]
100038 I [irq28: virtio_pci1]
100039 I [irq29: virtio_pci1]
100040 I [irq30: virtio_pci1]
100041 I [irq31: virtio_pci1]
100042 I [irq32: virtio_pci1]
100047 I [irq10: virtio_pci2]
100049 I [irq1: atkbd0]
100050 I [irq12: psm0]
100051 I [swi0: uart uart++]
100060 I [swi1: pf send]
100072 I [swi1: hpts]
100073 I [swi1: hpts]
11 0 0 0 RL (threaded) [idle]
100003 CanRun [idle: cpu0]
100004 CanRun [idle: cpu1]
1 0 1 0 SLs wait 0xfffff8000331a000 [init]
10 0 0 0 DL audit_w 0xffffffff82630598 [audit]
0 0 0 0 DLs (threaded) [kernel]
100000 D swapin 0xffffffff8250b710 [swapper]
100005 D - 0xfffff80003338000 [if_config_tqg_0]
100006 D - 0xfffff80003339e00 [softirq_0]
100007 D - 0xfffff80003339d00 [softirq_1]
100008 D - 0xfffff80003339c00 [if_io_tqg_0]
100009 D - 0xfffff80003339b00 [if_io_tqg_1]
100011 D - 0xfffff8000333e000 [in6m_free taskq]
100012 D - 0xfffff8000333fe00 [thread taskq]
100014 D - 0xfffff8000333fc00 [kqueue_ctx taskq]
100015 D - 0xfffff8000333fb00 [aiod_kick taskq]
100023 D - 0xfffff8000333f900 [firmware taskq]
100028 D - 0xfffff8000333f800 [crypto_0]
100029 D - 0xfffff8000333f800 [crypto_1]
100043 D - 0xfffff8000333f500 [vtnet0 rxq 0]
100044 D - 0xfffff8000333f400 [vtnet0 txq 0]
100045 D - 0xfffff8000333f300 [vtnet0 rxq 1]
100046 D - 0xfffff8000333f200 [vtnet0 txq 1]
100048 D vtbslp 0xfffff800034fc580 [virtio_balloon]
100052 D - 0xfffff8000333f100 [mca taskq]
100057 D - 0xffffffff81cec741 [deadlkres]
100061 D - 0xfffff80003b5c300 [acpi_task_0]
100062 D - 0xfffff80003b5c300 [acpi_task_1]
100063 D - 0xfffff80003b5c300 [acpi_task_2]
100065 D - 0xfffff8000333f700 [CAM taskq]
db> show all locks
Process 4054 (syz-executor.1) thread 0xfffffe0025bd9300 (101073)
exclusive rm pf rulesets (pf rulesets) r = 0 (0xffffffff82ba4110) locked @ /syzkaller/managers/main/kernel/sys/netpfil/pf/pf_ioctl.c:1585
db> show malloc
Type InUse MemUse Requests
pf_hash 5 11524K 5
devbuf 4213 4851K 4241
tcp_hpts 5 3201K 5
vtbuf 24 1968K 46
sysctloid 28335 1653K 28399
kobj 332 1328K 488
newblk 5 1025K 23776
vfscache 4 1025K 4
pcb 51 566K 5022
inodedep 9 516K 5326
ufs_quota 1 512K 1
vfs_hash 1 512K 1
callout 2 512K 2
intr 4 388K 4
subproc 141 277K 4137
acpica 1674 185K 52709
vnet_data 1 168K 1
pagedep 9 130K 3970
tfo_ccache 1 128K 1
filedesc 17 117K 6410
sem 4 106K 4
DEVFS1 105 105K 122
linker 243 92K 279
bus 976 79K 3380
mtx_pool 2 72K 2
BPF 38 71K 38
syncache 1 68K 1
acpitask 1 64K 1
ddb_capture 1 64K 1
module 496 62K 496
umtx 360 45K 360
kdtrace 186 36K 17424
temp 35 33K 3401
hostcache 1 32K 1
shm 1 32K 4
DEVFS3 124 31K 134
msg 4 30K 4
DEVFS_RULE 56 27K 56
vmem 3 26K 5
gtaskqueue 18 26K 18
ifaddr 73 25K 78
kbdmux 6 22K 6
pf_rule 18 18K 111
ufs_mount 3 17K 4
proc 3 17K 3
lltable 44 16K 76
tty 16 16K 16
tidhash 1 16K 1
ithread 98 16K 98
ether_multi 172 14K 215
bus-sc 30 14K 1431
sctp_atcl 25 13K 3198
KTRACE 100 13K 100
ifnet 7 13K 7
sctp_stro 12 12K 815
kenv 95 12K 99
eventhandler 132 12K 132
in6_multi 89 11K 102
pfs_nodes 20 10K 20
GEOM 60 10K 486
rman 82 10K 423
bmsafemap 3 9K 5407
UART 12 9K 12
devstat 4 9K 4
rpc 2 8K 2
sctp_timw 32 8K 32
shmfd 1 8K 32
pfs_vncache 1 8K 1
select 62 8K 62
routetbl 56 8K 71
audit_evclass 232 8K 290
cred 27 7K 340
CAM DEV 3 6K 510
kqueue 61 6K 4059
plimit 23 6K 493
vt 11 6K 11
pf_ifnet 14 6K 35
sglist 5 6K 5
CAM queue 5 6K 1528
DEVFSP 76 5K 98
taskqueue 45 5K 45
ufs_dirhash 24 5K 24
memdesc 1 4K 1
MCA 32 4K 32
UMA 249 4K 249
ioctlops 1 4K 837
evdev 4 4K 4
kcovinfo 64 4K 85
session 31 4K 45
pgrp 31 4K 45
lockf 34 4K 382
hhook 13 4K 13
acpisem 22 3K 22
terminal 11 3K 11
proc-args 50 3K 617
uidinfo 4 3K 11
sctp_ifa 17 3K 20
local_apic 1 2K 1
io_apic 1 2K 1
ipsec-saq 2 2K 2
ip6ndp 12 2K 23
CAM XPT 22 2K 543
Unitno 27 2K 16491
sctp_atky 37 2K 4021
in_multi 6 2K 12
acpidev 20 2K 20
msi 9 2K 9
tun 7 2K 7
softdep 1 1K 1
ipsecpolicy 1 1K 1
sahead 1 1K 1
secasvar 1 1K 1
clone 8 1K 8
vnodemarker 2 1K 266
NFSD session 1 1K 1
CAM periph 4 1K 271
mld 6 1K 6
sctp_ifn 6 1K 7
igmp 6 1K 6
nhops 6 1K 6
toponodes 6 1K 6
isadev 6 1K 6
mount 16 1K 86
pci_link 10 1K 10
crypto 3 1K 3
newdirblk 4 1K 3849
mkdir 4 1K 7698
diradd 4 1K 4913
pfil 4 1K 4
chacha20random 1 1K 1
CAM SIM 2 1K 2
epoch 4 1K 4
cdev 2 1K 2
inpcbpolicy 14 1K 12482
encap_export_host 8 1K 8
sctp_athm 25 1K 3198
sctp_map 24 1K 1630
osd 3 1K 9
vnodes 1 1K 10
NFSD lckfile 1 1K 1
NFSD V4client 1 1K 1
DEVFS 9 1K 10
feeder 7 1K 7
tcpfunc 3 1K 3
loginclass 3 1K 6
CAM dev queue 2 1K 2
CAM I/O Scheduler 1 1K 1
apmdev 1 1K 1
atkbddev 2 1K 2
CAM path 4 1K 1034
ktls 1 1K 1
pmchooks 1 1K 1
prison 4 1K 4
soname 4 1K 7761
nexusdev 5 1K 5
entropy 2 1K 41
sctp_vrf 1 1K 1
vnet 1 1K 1
acpiintr 1 1K 1
pmc 1 1K 1
filecaps 4 1K 103
cpus 2 1K 2
vnet_data_free 1 1K 1
Per-cpu 1 1K 1
freework 1 1K 11036
p1003.1b 1 1K 1
pf_table 0 0K 1
pf_altq 0 0K 0
pf_osfp 0 0K 0
pf_temp 0 0K 0
ath_hal 0 0K 0
madt_table 0 0K 2
athdev 0 0K 0
ata_pci 0 0K 0
ata_dma 0 0K 0
ata_generic 0 0K 0
amr 0 0K 0
scsi_da 0 0K 69
ata_da 0 0K 0
pvscsi 0 0K 0
smartpqi 0 0K 0
scsi_ch 0 0K 0
scsi_cd 0 0K 0
USBdev 0 0K 0
USB 0 0K 0
AHCI driver 0 0K 0
agp 0 0K 0
iavf 0 0K 0
ixl 0 0K 0
nvme_da 0 0K 0
acpipwr 0 0K 0
twsbuf 0 0K 0
twe_commands 0 0K 0
twa_commands 0 0K 0
tcp_log_dev 0 0K 0
midi buffers 0 0K 0
fpukern_ctx 0 0K 0
mixer 0 0K 0
xen_intr 0 0K 0
ac97 0 0K 0
xen_hvm 0 0K 0
legacydrv 0 0K 0
qpidrv 0 0K 0
hdacc 0 0K 0
hdac 0 0K 0
dmar_idpgtbl 0 0K 0
dmar_dom 0 0K 0
dmar_ctx 0 0K 0
dmar_dmamap 0 0K 0
hdaa 0 0K 0
acpi_perf 0 0K 0
acpicmbat 0 0K 0
isci 0 0K 0
bxe_ilt 0 0K 0
xenbus 0 0K 0
SIIS driver 0 0K 0
vm_fictitious 0 0K 0
CAM CCB 0 0K 50159
PUC 0 0K 0
ppbusdev 0 0K 0
agtiapi_MemAlloc malloc 0 0K 0
osti_cacheable 0 0K 0
tempbuff 0 0K 0
tempbuff 0 0K 0
UMAHash 0 0K 0
ag_tgt_map_t malloc 0 0K 0
ag_slr_map_t malloc 0 0K 0
vm_pgdata 0 0K 0
jblocks 0 0K 0
savedino 0 0K 4569
sentinel 0 0K 0
jfsync 0 0K 0
jtrunc 0 0K 0
sbdep 0 0K 134
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
dirrem 0 0K 4871
freefile 0 0K 4538
freeblks 0 0K 4860
freefrag 0 0K 508
allocindir 0 0K 0
indirdep 0 0K 9785
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
xform 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 84
ip6_msource 0 0K 0
ip6_moptions 0 0K 0
in6_mfilter 0 0K 0
frag6 0 0K 3
tcplog 0 0K 0
lDevFlags * malloc 0 0K 0
LRO 0 0K 0
sctp_mcore 0 0K 0
sctp_socko 0 0K 2042
sctp_iter 0 0K 14
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 14
sctp_aadr 0 0K 0
sctp_stri 0 0K 0
newreno data 0 0K 0
ip_msource 0 0K 1
ip_moptions 0 0K 62
in_mfilter 0 0K 9
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 225
tiDeviceHandle_t * malloc 0 0K 0
statfs 0 0K 3710
export_host 0 0K 0
cl_savebuf 0 0K 12
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
biobuf 0 0K 0
aios 0 0K 0
lio 0 0K 0
acl 0 0K 0
MPSSAS 0 0K 0
mbuf_tag 0 0K 186
accf 0 0K 0
pts 0 0K 0
iov 0 0K 19963
Witness 0 0K 0
stack 0 0K 0
mps 0 0K 0
mpr_user 0 0K 0
MPRSAS 0 0K 0
mpr 0 0K 0
mfibuf 0 0K 0
md_sectors 0 0K 0
sbuf 0 0K 288
md_disk 0 0K 0
compressor 0 0K 0
malodev 0 0K 0
SWAP 0 0K 0
LED 0 0K 0
sysctltmp 0 0K 655
sysctl 0 0K 1
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
ix 0 0K 0
ipsbuf 0 0K 0
iirbuf 0 0K 0
cache 0 0K 0
aacraid_buf 0 0K 0
prison_racct 0 0K 0
Fail Points 0 0K 0
sigio 0 0K 5
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
nvlist 0 0K 0
SCSI ENC 0 0K 0
SCSI sa 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
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 diroffdiroff 0 0K 0
NEWdirectio 0 0K 0
NEWNFSnode 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
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
msdosfs_fat 0 0K 0
msdosfs_mount 0 0K 0
msdosfs_node 0 0K 0
DEVFS4 0 0K 0
DEVFS2 0 0K 0
gntdev 0 0K 0
privcmd_dev 0 0K 0
evtchn_dev 0 0K 0
xenstore 0 0K 0
scsi_pass 0 0K 0
ciss_data 0 0K 0
xnb 0 0K 0
xbbd 0 0K 0
xbd 0 0K 0
Balloon 0 0K 0
sysmouse 0 0K 0
vtfont 0 0K 0
db> show ktr
No such command; use "help" to list available commands


---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
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syzbot

unread,
Apr 15, 2020, 6:33:15 PM4/15/20
to syzkaller-f...@googlegroups.com
syzbot has found a reproducer for the following crash on:

HEAD commit: 20768ae4 Do not attempt to remove backward compatibility t..
git tree: freebsd
console output: https://syzkaller.appspot.com/x/log.txt?x=1606f2abe00000
dashboard link: https://syzkaller.appspot.com/bug?extid=13f87ee993fc05259035
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=120dae20100000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=110e933be00000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+13f87e...@syzkaller.appspotmail.com

panic: Bad tailq NEXT(0xfffff80003b20cc0->tqh_last) != NULL
cpuid = 0
time = 1586989449
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0025a5e140
vpanic() at vpanic+0x1c7/frame 0xfffffe0025a5e1a0
panic() at panic+0x43/frame 0xfffffe0025a5e200
pf_tagname2tag() at pf_tagname2tag+0x2c5/frame 0xfffffe0025a5e260
pfioctl() at pfioctl+0x6ae3/frame 0xfffffe0025a5e790
devfs_ioctl() at devfs_ioctl+0x14e/frame 0xfffffe0025a5e7f0
VOP_IOCTL_APV() at VOP_IOCTL_APV+0x78/frame 0xfffffe0025a5e820
vn_ioctl() at vn_ioctl+0x27c/frame 0xfffffe0025a5e940
devfs_ioctl_f() at devfs_ioctl_f+0x47/frame 0xfffffe0025a5e980
kern_ioctl() at kern_ioctl+0x3d4/frame 0xfffffe0025a5e9f0
sys_ioctl() at sys_ioctl+0x266/frame 0xfffffe0025a5eac0
amd64_syscall() at amd64_syscall+0x262/frame 0xfffffe0025a5ebf0
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0025a5ebf0
--- syscall (0, FreeBSD ELF64, nosys), rip = 0x41c5ba, rsp = 0x7fffffffeab8, rbp = 0xffffffff ---
KDB: enter: panic
[ thread pid 775 tid 100111 ]
Stopped at kdb_enter+0x67: movq $0,0x14aa046(%rip)
db>
db> set $lines = 0
db> set $maxwidth = 0
db> show registers
cs 0x20
ds 0x3b ll+0x1a
es 0x3b ll+0x1a
fs 0x13
gs 0x1b
ss 0x28 ll+0x7
rax 0x12
rcx 0x80 ll+0x5f
rdx 0xffffffff818a9109
rbx 0
rsp 0xfffffe0025a5e120
rbp 0xfffffe0025a5e140
rsi 0x1
rdi 0
r8 0
r9 0xffffffff
r10 0
r11 0xfffffe0025791f10
r12 0xffffffff82068e80 ddb_dbbe
r13 0
r14 0xffffffff8194913d
r15 0xffffffff8194913d
rip 0xffffffff810ad827 kdb_enter+0x67
rflags 0x82 ll+0x61
kdb_enter+0x67: movq $0,0x14aa046(%rip)
db> show proc
Process 775 (syz-executor0642638) at 0xfffff8003b57a520:
state: NORMAL
uid: 0 gids: 0, 0, 5
parent: pid 773 at 0xfffff8003b3f5000
ABI: FreeBSD ELF64
arguments: ./syz-executor064263897
reaper: 0xfffff8000331a000 reapsubtree: 1
sigparent: 20
vmspace: 0xfffffe0023bea3d0
(map 0xfffffe0023bea3d0)
(map.pmap 0xfffffe0023bea490)
(pmap 0xfffffe0023bea4f0)
threads: 1
100111 Run CPU 0 syz-executor0642638
db> ps
pid ppid pgrp uid state wmesg wchan cmd
775 773 771 0 R CPU 0 syz-executor0642638
773 771 771 0 S nanslp 0xffffffff8252c1f1 syz-executor0642638
771 769 771 0 Ss pause 0xfffff8003b57aae8 csh
769 682 769 0 Rs CPU 1 sshd
748 1 748 0 Ss+ ttyin 0xfffff8000356f8b0 getty
747 1 747 0 Ss+ ttyin 0xfffff80003b6fcb0 getty
746 1 746 0 Ss+ ttyin 0xfffff80003b6e4b0 getty
745 1 745 0 Ss+ ttyin 0xfffff80003b6ecb0 getty
744 1 744 0 Ss+ ttyin 0xfffff800033b74b0 getty
743 1 743 0 Ss+ ttyin 0xfffff800033b7cb0 getty
742 1 742 0 Ss+ ttyin 0xfffff800033b64b0 getty
741 1 741 0 Ss+ ttyin 0xfffff800033b6cb0 getty
740 1 740 0 Ss+ ttyin 0xfffff800033b94b0 getty
738 1 24 0 S+ piperd 0xfffff80003cb28e8 logger
737 736 24 0 S+ nanslp 0xffffffff8252c1f0 sleep
736 1 24 0 S+ wait 0xfffff80003cb8520 sh
686 1 686 0 Ss nanslp 0xffffffff8252c1f0 cron
682 1 682 0 Ss select 0xfffff80003c04ac0 sshd
495 1 495 0 Ss select 0xfffff80003c030c0 syslogd
424 1 424 0 Ss select 0xfffff80003c03040 devd
423 1 423 65 Ss select 0xfffff80003c04d40 dhclient
338 1 338 0 Ss select 0xfffff800030845c0 dhclient
335 1 335 0 Ss select 0xfffff80003084540 dhclient
23 0 0 0 DL syncer 0xffffffff82618118 [syncer]
22 0 0 0 DL vlruwt 0xfffff800033e0a40 [vnlru]
21 0 0 0 DL (threaded) [bufdaemon]
100069 D qsleep 0xffffffff82617438 [bufdaemon]
100076 D - 0xffffffff8200aa00 [bufspacedaemon-0]
100087 D sdflush 0xfffff80003c27ce8 [/ worker]
20 0 0 0 DL psleep 0xffffffff8263e3c8 [vmdaemon]
19 0 0 0 DL (threaded) [pagedaemon]
100067 D psleep 0xffffffff82632998 [dom0]
100074 D launds 0xffffffff826329a4 [laundry: dom0]
100075 D umarcl 0xffffffff8154ae00 [uma]
18 0 0 0 DL - 0xffffffff8235fe20 [rand_harvestq]
17 0 0 0 DL pftm 0xffffffff82c353a0 [pf purge]
Process 775 (syz-executor0642638) thread 0xfffffe0025791a00 (100111)
exclusive rm pf rulesets (pf rulesets) r = 0 (0xffffffff82c86110) locked @ /syzkaller/managers/main/kernel/sys/netpfil/pf/pf_ioctl.c:1585
Process 769 (sshd) thread 0xfffffe00257b0500 (100105)
exclusive sleep mutex so_snd (so_snd) r = 0 (0xfffffe001cfce5e0) locked @ /syzkaller/managers/main/kernel/sys/kern/uipc_sockbuf.c:893
exclusive rw tcpinp (tcpinp) r = 0 (0xfffff8003b4fe3f0) locked @ /syzkaller/managers/main/kernel/sys/netinet/tcp_usrreq.c:965
exclusive sx so_snd_sx (so_snd_sx) r = 0 (0xfffffe001cfce600) locked @ /syzkaller/managers/main/kernel/sys/kern/uipc_sockbuf.c:419
db> show malloc
Type InUse MemUse Requests
pf_hash 5 11524K 5
devbuf 4213 4851K 4238
tcp_hpts 5 3201K 5
vtbuf 24 1968K 46
sysctloid 28335 1653K 28399
kobj 332 1328K 488
newblk 511 1152K 529
vfscache 4 1025K 4
pcb 21 537K 75
inodedep 48 536K 71
ufs_quota 1 512K 1
vfs_hash 1 512K 1
callout 2 512K 2
intr 4 388K 4
subproc 114 222K 843
acpica 1674 185K 52709
vnet_data 1 168K 1
pagedep 14 132K 18
tfo_ccache 1 128K 1
sem 4 106K 4
DEVFS1 101 101K 110
linker 243 92K 264
bus 964 78K 3344
mtx_pool 2 72K 2
syncache 1 68K 1
acpitask 1 64K 1
ddb_capture 1 64K 1
module 496 62K 496
temp 18 33K 1540
hostcache 1 32K 1
shm 1 32K 1
msg 4 30K 4
DEVFS3 120 30K 130
umtx 234 30K 234
kdtrace 148 29K 1606
DEVFS_RULE 56 27K 56
gtaskqueue 18 26K 18
vmem 3 22K 4
kbdmux 6 22K 6
BPF 10 18K 10
ufs_mount 3 17K 4
proc 3 17K 3
tty 16 16K 16
tidhash 1 16K 1
ithread 98 16K 98
bus-sc 30 14K 1431
KTRACE 100 13K 100
ifaddr 30 12K 32
kenv 95 12K 99
eventhandler 132 12K 132
pfs_nodes 20 10K 20
GEOM 60 10K 486
rman 82 10K 423
bmsafemap 4 9K 41
UART 12 9K 12
devstat 4 9K 4
rpc 2 8K 2
shmfd 1 8K 1
pfs_vncache 1 8K 1
audit_evclass 232 8K 290
CAM DEV 3 6K 510
vt 11 6K 11
cred 21 6K 234
sglist 5 6K 5
CAM queue 5 6K 1528
routetbl 28 5K 36
taskqueue 45 5K 45
ufs_dirhash 24 5K 24
dirrem 17 5K 28
plimit 17 5K 322
ifnet 3 5K 3
memdesc 1 4K 1
MCA 32 4K 32
UMA 249 4K 249
ioctlops 1 4K 92
evdev 4 4K 4
filedesc 1 4K 1
pf_ifnet 7 4K 8
lltable 11 4K 11
hhook 13 4K 13
ether_multi 40 4K 45
diradd 25 4K 36
in6_multi 25 3K 25
kqueue 47 3K 778
acpisem 22 3K 22
terminal 11 3K 11
select 21 3K 21
session 20 3K 31
pgrp 20 3K 31
uidinfo 3 3K 8
local_apic 1 2K 1
io_apic 1 2K 1
ipsec-saq 2 2K 2
proc-args 39 2K 472
CAM XPT 22 2K 543
lockf 15 2K 22
Unitno 25 2K 37
acpidev 20 2K 20
msi 9 2K 9
pf_rule 1 1K 2
softdep 1 1K 1
ipsecpolicy 1 1K 1
sahead 1 1K 1
secasvar 1 1K 1
clone 8 1K 8
vnodemarker 2 1K 8
NFSD session 1 1K 1
CAM periph 4 1K 271
indirdep 3 1K 3
nhops 6 1K 6
toponodes 6 1K 6
isadev 6 1K 6
mount 16 1K 86
pci_link 10 1K 10
ip6ndp 4 1K 5
sctp_ifa 5 1K 5
crypto 3 1K 3
newdirblk 4 1K 8
mkdir 4 1K 16
in_multi 2 1K 3
pfil 4 1K 4
chacha20random 1 1K 1
CAM SIM 2 1K 2
epoch 4 1K 4
cdev 2 1K 2
encap_export_host 8 1K 8
osd 3 1K 9
mld 2 1K 2
sctp_ifn 2 1K 2
igmp 2 1K 2
vnodes 1 1K 1
NFSD lckfile 1 1K 1
NFSD V4client 1 1K 1
DEVFS 9 1K 10
feeder 7 1K 7
inpcbpolicy 6 1K 131
tcpfunc 3 1K 3
loginclass 3 1K 7
CAM dev queue 2 1K 2
CAM I/O Scheduler 1 1K 1
apmdev 1 1K 1
atkbddev 2 1K 2
CAM path 4 1K 1034
ktls 1 1K 1
pmchooks 1 1K 1
prison 4 1K 4
DEVFSP 2 1K 2
soname 4 1K 5788
filecaps 4 1K 66
tun 3 1K 3
nexusdev 5 1K 5
entropy 2 1K 35
sctp_vrf 1 1K 1
vnet 1 1K 1
acpiintr 1 1K 1
pmc 1 1K 1
cpus 2 1K 2
vnet_data_free 1 1K 1
Per-cpu 1 1K 1
freework 1 1K 26
CAM CCB 0 0K 1797
PUC 0 0K 0
ppbusdev 0 0K 0
agtiapi_MemAlloc malloc 0 0K 0
osti_cacheable 0 0K 0
tempbuff 0 0K 0
tempbuff 0 0K 0
UMAHash 0 0K 0
ag_tgt_map_t malloc 0 0K 0
ag_slr_map_t malloc 0 0K 0
vm_pgdata 0 0K 0
jblocks 0 0K 0
savedino 0 0K 11
sentinel 0 0K 0
jfsync 0 0K 0
jtrunc 0 0K 0
sbdep 0 0K 3
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
freefile 0 0K 9
freeblks 0 0K 25
freefrag 0 0K 7
allocindir 0 0K 0
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
xform 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 3
ip6_msource 0 0K 0
ip6_moptions 0 0K 0
in6_mfilter 0 0K 0
frag6 0 0K 0
tcplog 0 0K 0
lDevFlags * malloc 0 0K 0
LRO 0 0K 0
sctp_mcore 0 0K 0
sctp_socko 0 0K 0
sctp_iter 0 0K 3
sctp_mvrf 0 0K 0
sctp_timw 0 0K 0
sctp_cpal 0 0K 0
sctp_cmsg 0 0K 0
sctp_stre 0 0K 0
sctp_athi 0 0K 0
sctp_athm 0 0K 0
sctp_atky 0 0K 0
sctp_atcl 0 0K 0
sctp_a_it 0 0K 3
sctp_aadr 0 0K 0
sctp_stro 0 0K 0
sctp_stri 0 0K 0
sctp_map 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
tiDeviceHandle_t * malloc 0 0K 0
statfs 0 0K 196
export_host 0 0K 0
cl_savebuf 0 0K 3
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
biobuf 0 0K 0
aios 0 0K 0
lio 0 0K 0
acl 0 0K 0
MPSSAS 0 0K 0
mbuf_tag 0 0K 25
accf 0 0K 0
pts 0 0K 0
iov 0 0K 12983
kcovinfo 0 0K 0
prison_racct 0 0K 0
Fail Points 0 0K 0
sigio 0 0K 1

Mark Johnston

unread,
Nov 23, 2020, 10:16:53 AM11/23/20
to syzbot, syzkaller-f...@googlegroups.com
#syz invalid

This bug still appears to be present, but the repro doesn't work. Let's
try to get a new repro.
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