panic: poWoAlR_NcINaGc:h eS_PiLt eNmOT_ mLaOgWiEcR_EchD ecONk :S mYSbCuAfpLLl 1c37pu - f76r2e0e8 liEsXItT m0o 9d
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syzbot
May 10, 2020, 10:25:14 PM5/10/20
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: a78f83ce In bgpctl argument parser, re-arrange 'reason' pa..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=17508dec100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=54778aafe8503f699c35
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+54778a...@syzkaller.appspotmail.com
login: panic: poWoAlR_NcINaGc:h eS_PiLt eNmOT_ mLaOgWiEcR_EchD ecONk :S mYSbCuAfpLLl 1c37pu - f76r2e0e8 liEsXItT m0o 9d
if
iStopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 82783 90702 0 0x2 0 0 syz-executor.0
396612 75545 0 0x12 0 1 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffed640, count: 14
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd807f01f200+24 0x5c4cbf1e54511316!=0x5c4cbf9e3d2e8e16
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffed640, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800020f6b8d0
rbx 0
rdx 0xffff800020e6dd48
rcx 0
rax 0x38
r8 0xffffffff810fbc8f kprintf+0x16f
r9 0x1
r10 0x25
r11 0x4522d5bf3e52793c
r12 0
r13 0
r14 0xffff800020e6dd48
r15 0
rip 0xffffffff8195c3f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800020f6b850
ss 0
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.0) pid=82783 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=17, usrpri=59, nice=20
forw=0xffffffffffffffff, list=0xffff800020e6c758,0xffff800020ed9618
process=0xffff800020e807c0 user=0xffff800020f66000, vmspace=0xfffffd807f000450
estcpu=36, cpticks=1, pctcpu=0.2
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
3663 350943 0 0 3 0x14200 acct acct
64715 402129 0 0 3 0x14200 bored sosplice
88479 196274 5868 0 2 0x2 syz-executor.1
*90702 82783 5868 0 7 0x2 syz-executor.0
5868 124074 75296 0 3 0x82 thrsleep syz-fuzzer
5868 27476 75296 0 3 0x4000082 nanosleep syz-fuzzer
5868 358657 75296 0 3 0x4000082 thrsleep syz-fuzzer
5868 27454 75296 0 2 0x4000002 syz-fuzzer
5868 212880 75296 0 3 0x4000082 thrsleep syz-fuzzer
5868 387606 75296 0 3 0x4000082 thrsleep syz-fuzzer
5868 390586 75296 0 3 0x4000082 thrsleep syz-fuzzer
5868 384643 75296 0 2 0x4000002 syz-fuzzer
5868 143348 75296 0 3 0x4000082 thrsleep syz-fuzzer
5868 175204 75296 0 3 0x4000082 thrsleep syz-fuzzer
75296 468433 75545 0 3 0x10008a pause ksh
75545 396612 98986 0 7 0x12 sshd
18667 363366 1 0 3 0x100083 ttyin getty
98986 162061 1 0 3 0x80 select sshd
75317 360367 22879 74 3 0x100092 bpf pflogd
22879 300994 1 0 3 0x80 netio pflogd
97615 210156 4994 73 3 0x100090 kqread syslogd
4994 365400 1 0 3 0x100082 netio syslogd
84950 344810 1 77 3 0x100090 poll dhclient
28861 70217 1 0 3 0x80 poll dhclient
39048 453862 0 0 3 0x14200 bored smr
51501 328327 0 0 3 0x14200 pgzero zerothread
69907 451495 0 0 3 0x14200 aiodoned aiodoned
75812 448064 0 0 3 0x14200 syncer update
98011 315051 0 0 3 0x14200 cleaner cleaner
57888 49568 0 0 3 0x14200 reaper reaper
99695 126619 0 0 3 0x14200 pgdaemon pagedaemon
60011 341344 0 0 3 0x14200 bored crynlk
19072 156042 0 0 3 0x14200 bored crypto
52745 312422 0 0 3 0x40014200 acpi0 acpi0
65430 439844 0 0 3 0x40014200 idle1
84712 322085 0 0 3 0x14200 bored softnet
54591 13117 0 0 3 0x14200 bored systqmp
39085 327528 0 0 3 0x14200 bored systq
35132 273942 0 0 3 0x40014200 bored softclock
39811 471964 0 0 3 0x40014200 idle0
1 245990 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &bq->bufq_mtx r = 0 (0xffff80000017ad68)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 bufq_dequeue+0x2c sys/kern/kern_bufq.c:199
#4 sdstart+0x9f sys/scsi/sd.c:683
#5 scsi_iopool_run+0x129 scsi_ioh_pending sys/scsi/scsi_base.c:404 [inline]
#5 scsi_iopool_run+0x129 sys/scsi/scsi_base.c:420
#6 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:596
#7 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#8 sdstrategy+0x187 sys/scsi/sd.c:585
#9 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#10 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#11 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#12 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#13 ffs_truncate+0xc76
#14 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1355
#15 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#16 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#17 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#17 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#18 Xsyscall+0x128
Process 90702 (syz-executor.0) thread 0xffff800020e6dd48 (82783)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82681848)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227
#2 mi_switch+0x392 sys/kern/sched_bsd.c:435
#3 sleep_finish+0x113 sys/kern/kern_synch.c:418
#4 sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline]
#4 sleep_finish_all+0x32 sys/kern/kern_synch.c:393
#5 tsleep+0x1cc sys/kern/kern_synch.c:155
#6 biowait+0xa6 sys/kern/vfs_bio.c:1256
#7 bwrite+0x1e4 sys/kern/vfs_bio.c:765
#8 ufs_dirremove+0x291
#9 ufs_rmdir+0x247 sys/ufs/ufs/ufs_vnops.c:1328
#10 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#11 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#12 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#12 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#13 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806b3545e8)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:575
#5 vget+0x1c8 sys/kern/vfs_subr.c:671
#6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1329
#8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90
#10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568
#11 namei+0x63c sys/kern/vfs_lookup.c:249
#12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853
#13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806b354918)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:575
#5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6 namei+0x63c sys/kern/vfs_lookup.c:249
#7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#9 Xsyscall+0x128
exclusive mutex &bq->bufq_mtx r = 0 (0xffff80000017ad68)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 bufq_dequeue+0x2c sys/kern/kern_bufq.c:199
#4 sdstart+0x9f sys/scsi/sd.c:683
#5 scsi_iopool_run+0x129 scsi_ioh_pending sys/scsi/scsi_base.c:404 [inline]
#5 scsi_iopool_run+0x129 sys/scsi/scsi_base.c:420
#6 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:596
#7 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#8 sdstrategy+0x187 sys/scsi/sd.c:585
#9 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#10 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#11 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#12 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#13 ffs_truncate+0xc76
#14 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1355
#15 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#16 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#17 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#17 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#18 Xsyscall+0x128
Process 75545 (sshd) thread 0xffff800020ed1390 (396612)
exclusive rwlock netlock r = 0 (0xffffffff82517dc8)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 solock+0x5a sys/kern/uipc_socket2.c:282
#2 sosend+0x559 sys/kern/uipc_socket.c:537
#3 dofilewritev+0x1b6 sys/kern/sys_generic.c:365
#4 sys_write+0x83 sys/kern/sys_generic.c:285
#5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#6 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9511 6663K 6789K 78643K 10718 0
pcb 13 8K 8K 78643K 25 0
rtable 107 3K 3K 78643K 223 0
ifaddr 57 12K 12K 78643K 63 0
counters 43 33K 34K 78643K 45 0
ioctlops 0 0K 4K 78643K 1472 0
iov 0 0K 16K 78643K 24 0
mount 1 1K 1K 78643K 1 0
vnodes 1219 77K 77K 78643K 1266 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 1K 78643K 2 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 12 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1823 197K 290K 78643K 12980 0
file desc 4 9K 25K 78643K 117 0
sigio 0 0K 0K 78643K 1 0
proc 60 63K 95K 78643K 446 0
subproc 32 2K 2K 78643K 34 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 4 0
in_multi 46 2K 2K 78643K 49 0
ether_multi 1 0K 0K 78643K 2 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 43 201K 201K 78643K 43 0
exec 0 0K 1K 78643K 225 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 117 22K 23K 78643K 1314 0
UVM aobj 2 2K 2K 78643K 2 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 10 0
NDP 8 0K 0K 78643K 13 0
temp 90 3039K 3103K 78643K 2564 0
kqueue 4 5K 12K 78643K 19 0
SYN cache 2 16K 16K 78643K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 8 0 1 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 25 0 23 1 0 1 1 0 8 0
rtentry 112 49 0 4 2 0 2 2 0 8 0
unpcb 120 73 0 63 1 0 1 1 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 415 0 415 1 1 0 1 0 8 0
tcpcb 544 88 0 84 1 0 1 1 0 8 0
inpcb 280 154 0 147 2 0 2 2 0 8 1
nd6 48 6 0 0 1 0 1 1 0 8 0
pkpcb 40 2 0 2 1 1 0 1 0 8 0
pffrent 40 4 0 4 2 1 1 1 0 8 1
pfosfp 40 846 0 423 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 16 0 2 1 0 1 1 0 8 0
pfstkey 112 16 0 2 1 0 1 1 0 8 0
pfstate 328 16 0 2 2 0 2 2 0 8 0
pfrule 1360 21 0 15 2 0 2 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 198 0 2 13 0 13 13 0 8 0
art_table 32 199 0 2 2 0 2 2 0 8 0
art_node 16 48 0 7 1 0 1 1 0 8 0
sysvmsgpl 40 14 0 7 1 0 1 1 0 8 0
semupl 112 1 0 1 1 0 1 1 0 8 1
semapl 112 10 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1549 0 143 89 0 89 89 0 8 0
ffsino 272 1549 0 143 94 0 94 94 0 8 0
nchpl 144 1881 0 276 60 0 60 60 0 8 0
uvmvnodes 72 1620 0 0 30 0 30 30 0 8 0
vnodes 208 1620 0 0 86 0 86 86 0 8 0
namei 1024 5023 0 5023 1 0 1 1 0 8 1
percpumem 16 33 0 1 1 0 1 1 0 8 0
scxspl 192 5150 0 5150 8 1 7 7 0 8 7
plimitpl 152 27 0 19 1 0 1 1 0 8 0
sigapl 424 334 0 302 4 0 4 4 0 8 0
futexpl 56 1391 0 1391 1 0 1 1 0 8 1
knotepl 112 73 0 54 1 0 1 1 0 8 0
kqueuepl 144 64 0 61 1 0 1 1 0 8 0
pipelkpl 48 83 0 73 1 0 1 1 0 8 0
pipepl 120 166 0 147 1 0 1 1 0 8 0
fdescpl 496 317 0 302 3 0 3 3 0 8 0
filepl 152 1726 0 1626 5 0 5 5 0 8 1
lockfpl 104 42 0 41 1 0 1 1 0 8 0
lockfspl 48 12 0 11 1 0 1 1 0 8 0
sessionpl 112 18 0 7 1 0 1 1 0 8 0
pgrppl 48 24 0 13 1 0 1 1 0 8 0
ucredpl 96 133 0 123 1 0 1 1 0 8 0
zombiepl 144 302 0 302 1 0 1 1 0 8 1
processpl 984 334 0 302 5 0 5 5 0 8 0
procpl 624 554 0 513 4 0 4 4 0 8 0
sosppl 128 5 0 5 1 0 1 1 0 8 1
sockpl 400 254 0 235 3 0 3 3 0 8 1
mcl64k 65536 3 0 0 1 0 1 1 0 8 0
mcl12k 12288 1 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl4k 4096 5 0 0 1 0 1 1 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 184 0 0 22 0 22 22 0 8 0
mtagpl 80 4 0 0 1 0 1 1 0 8 0
mbufpl 256 213 0 0 13 0 13 13 0 8 0
bufpl 280 3524 0 133 243 0 243 243 0 8 0
anonpl 16 49469 0 35965 69 1 68 68 0 124 13
amapchunkpl 152 1567 0 1439 8 2 6 8 0 158 0
amappl16 192 1621 0 901 49 5 44 47 0 8 8
amappl15 184 54 0 51 1 0 1 1 0 8 0
amappl14 176 23 0 18 1 0 1 1 0 8 0
amappl13 168 25 0 24 1 0 1 1 0 8 0
amappl12 160 64 0 57 1 0 1 1 0 8 0
amappl11 152 51 0 36 1 0 1 1 0 8 0
amappl10 144 21 0 16 1 0 1 1 0 8 0
amappl9 136 418 0 416 1 0 1 1 0 8 0
amappl8 128 383 0 347 2 0 2 2 0 8 0
amappl7 120 119 0 107 1 0 1 1 0 8 0
amappl6 112 23 0 19 1 0 1 1 0 8 0
amappl5 104 229 0 214 1 0 1 1 0 8 0
amappl4 96 487 0 457 1 0 1 1 0 8 0
amappl3 88 105 0 97 1 0 1 1 0 8 0
amappl2 80 1634 0 1571 2 0 2 2 0 8 0
amappl1 72 17339 0 16913 23 13 10 18 0 8 0
amappl 80 793 0 753 2 0 2 2 0 84 1
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 64 1 0 0 1 0 1 1 0 8 0
uaddrrnd 24 317 0 302 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 317 0 302 1 0 1 1 0 8 0
vmmpekpl 168 6564 0 6531 2 0 2 2 0 8 0
vmmpepl 168 45755 0 43983 110 9 101 105 0 357 18
vmsppl 368 316 0 302 2 0 2 2 0 8 0
pdppl 4096 642 0 604 6 0 6 6 0 8 0
pvpl 32 160120 0 143540 171 0 171 171 0 265 37
pmappl 232 316 0 302 2 1 1 2 0 8 0
extentpl 40 46 0 29 1 0 1 1 0 8 0
phpool 112 258 0 2 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffed640, count: -1
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,69) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,69) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,69) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(69) at cnputc+0x4c sys/dev/cons.c:239
kputchar(69,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff821f63fd) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821f63fd) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82653a00) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82653a00) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82653a00,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
tcp_output(ffff800000a0c320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eb24c88,9,fffffd806d91fc00,0,0,ffff800020ed1390) at tcp_usrreq+0xa55
end trace frame: 0xffff800020ed7c10, count: 0
ddb{1}> trace
x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,69) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,69) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,69) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(69) at cnputc+0x4c sys/dev/cons.c:239
kputchar(69,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff821f63fd) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821f63fd) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82653a00) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82653a00) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82653a00,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
tcp_output(ffff800000a0c320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eb24c88,9,fffffd806d91fc00,0,0,ffff800020ed1390) at tcp_usrreq+0xa55
sosend(fffffd806eb24c88,0,ffff800020ed7cd8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020ed1390,4,ffff800020ed7cd8,0,ffff800020ed7dc0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020ed1390,ffff800020ed7d70,ffff800020ed7dc0) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020ed7e40) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020ed7e40) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffb9bc0, count: -19
---
This bug 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 bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot found the following crash on:
HEAD commit: a78f83ce In bgpctl argument parser, re-arrange 'reason' pa..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=17508dec100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=54778aafe8503f699c35
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+54778a...@syzkaller.appspotmail.com
login: panic: poWoAlR_NcINaGc:h eS_PiLt eNmOT_ mLaOgWiEcR_EchD ecONk :S mYSbCuAfpLLl 1c37pu - f76r2e0e8 liEsXItT m0o 9d
if
iStopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 82783 90702 0 0x2 0 0 syz-executor.0
396612 75545 0 0x12 0 1 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffed640, count: 14
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports. Insufficient info makes it difficult to find and fix bugs.
ddb{0}>
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd807f01f200+24 0x5c4cbf1e54511316!=0x5c4cbf9e3d2e8e16
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffed640, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800020f6b8d0
rbx 0
rdx 0xffff800020e6dd48
rcx 0
rax 0x38
r8 0xffffffff810fbc8f kprintf+0x16f
r9 0x1
r10 0x25
r11 0x4522d5bf3e52793c
r12 0
r13 0
r14 0xffff800020e6dd48
r15 0
rip 0xffffffff8195c3f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800020f6b850
ss 0
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.0) pid=82783 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=17, usrpri=59, nice=20
forw=0xffffffffffffffff, list=0xffff800020e6c758,0xffff800020ed9618
process=0xffff800020e807c0 user=0xffff800020f66000, vmspace=0xfffffd807f000450
estcpu=36, cpticks=1, pctcpu=0.2
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
3663 350943 0 0 3 0x14200 acct acct
64715 402129 0 0 3 0x14200 bored sosplice
88479 196274 5868 0 2 0x2 syz-executor.1
*90702 82783 5868 0 7 0x2 syz-executor.0
5868 124074 75296 0 3 0x82 thrsleep syz-fuzzer
5868 27476 75296 0 3 0x4000082 nanosleep syz-fuzzer
5868 358657 75296 0 3 0x4000082 thrsleep syz-fuzzer
5868 27454 75296 0 2 0x4000002 syz-fuzzer
5868 212880 75296 0 3 0x4000082 thrsleep syz-fuzzer
5868 387606 75296 0 3 0x4000082 thrsleep syz-fuzzer
5868 390586 75296 0 3 0x4000082 thrsleep syz-fuzzer
5868 384643 75296 0 2 0x4000002 syz-fuzzer
5868 143348 75296 0 3 0x4000082 thrsleep syz-fuzzer
5868 175204 75296 0 3 0x4000082 thrsleep syz-fuzzer
75296 468433 75545 0 3 0x10008a pause ksh
75545 396612 98986 0 7 0x12 sshd
18667 363366 1 0 3 0x100083 ttyin getty
98986 162061 1 0 3 0x80 select sshd
75317 360367 22879 74 3 0x100092 bpf pflogd
22879 300994 1 0 3 0x80 netio pflogd
97615 210156 4994 73 3 0x100090 kqread syslogd
4994 365400 1 0 3 0x100082 netio syslogd
84950 344810 1 77 3 0x100090 poll dhclient
28861 70217 1 0 3 0x80 poll dhclient
39048 453862 0 0 3 0x14200 bored smr
51501 328327 0 0 3 0x14200 pgzero zerothread
69907 451495 0 0 3 0x14200 aiodoned aiodoned
75812 448064 0 0 3 0x14200 syncer update
98011 315051 0 0 3 0x14200 cleaner cleaner
57888 49568 0 0 3 0x14200 reaper reaper
99695 126619 0 0 3 0x14200 pgdaemon pagedaemon
60011 341344 0 0 3 0x14200 bored crynlk
19072 156042 0 0 3 0x14200 bored crypto
52745 312422 0 0 3 0x40014200 acpi0 acpi0
65430 439844 0 0 3 0x40014200 idle1
84712 322085 0 0 3 0x14200 bored softnet
54591 13117 0 0 3 0x14200 bored systqmp
39085 327528 0 0 3 0x14200 bored systq
35132 273942 0 0 3 0x40014200 bored softclock
39811 471964 0 0 3 0x40014200 idle0
1 245990 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &bq->bufq_mtx r = 0 (0xffff80000017ad68)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 bufq_dequeue+0x2c sys/kern/kern_bufq.c:199
#4 sdstart+0x9f sys/scsi/sd.c:683
#5 scsi_iopool_run+0x129 scsi_ioh_pending sys/scsi/scsi_base.c:404 [inline]
#5 scsi_iopool_run+0x129 sys/scsi/scsi_base.c:420
#6 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:596
#7 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#8 sdstrategy+0x187 sys/scsi/sd.c:585
#9 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#10 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#11 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#12 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#13 ffs_truncate+0xc76
#14 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1355
#15 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#16 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#17 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#17 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#18 Xsyscall+0x128
Process 90702 (syz-executor.0) thread 0xffff800020e6dd48 (82783)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82681848)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227
#2 mi_switch+0x392 sys/kern/sched_bsd.c:435
#3 sleep_finish+0x113 sys/kern/kern_synch.c:418
#4 sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline]
#4 sleep_finish_all+0x32 sys/kern/kern_synch.c:393
#5 tsleep+0x1cc sys/kern/kern_synch.c:155
#6 biowait+0xa6 sys/kern/vfs_bio.c:1256
#7 bwrite+0x1e4 sys/kern/vfs_bio.c:765
#8 ufs_dirremove+0x291
#9 ufs_rmdir+0x247 sys/ufs/ufs/ufs_vnops.c:1328
#10 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#11 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#12 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#12 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#13 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806b3545e8)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:575
#5 vget+0x1c8 sys/kern/vfs_subr.c:671
#6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119
#7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1329
#8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487
#9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90
#10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568
#11 namei+0x63c sys/kern/vfs_lookup.c:249
#12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853
#13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#14 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffffd806b354918)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 rw_enter+0x453 sys/kern/kern_rwlock.c:311
#2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603
#4 vn_lock+0x81 sys/kern/vfs_vnops.c:575
#5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419
#6 namei+0x63c sys/kern/vfs_lookup.c:249
#7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853
#8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#9 Xsyscall+0x128
exclusive mutex &bq->bufq_mtx r = 0 (0xffff80000017ad68)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 mtx_enter_try+0x102
#2 mtx_enter+0x4b sys/kern/kern_lock.c:266
#3 bufq_dequeue+0x2c sys/kern/kern_bufq.c:199
#4 sdstart+0x9f sys/scsi/sd.c:683
#5 scsi_iopool_run+0x129 scsi_ioh_pending sys/scsi/scsi_base.c:404 [inline]
#5 scsi_iopool_run+0x129 sys/scsi/scsi_base.c:420
#6 scsi_xsh_runqueue+0x210 sys/scsi/scsi_base.c:596
#7 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#8 sdstrategy+0x187 sys/scsi/sd.c:585
#9 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#10 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#11 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#12 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#13 ffs_truncate+0xc76
#14 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1355
#15 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#16 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#17 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#17 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#18 Xsyscall+0x128
Process 75545 (sshd) thread 0xffff800020ed1390 (396612)
exclusive rwlock netlock r = 0 (0xffffffff82517dc8)
#0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164
#1 solock+0x5a sys/kern/uipc_socket2.c:282
#2 sosend+0x559 sys/kern/uipc_socket.c:537
#3 dofilewritev+0x1b6 sys/kern/sys_generic.c:365
#4 sys_write+0x83 sys/kern/sys_generic.c:285
#5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#6 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9511 6663K 6789K 78643K 10718 0
pcb 13 8K 8K 78643K 25 0
rtable 107 3K 3K 78643K 223 0
ifaddr 57 12K 12K 78643K 63 0
counters 43 33K 34K 78643K 45 0
ioctlops 0 0K 4K 78643K 1472 0
iov 0 0K 16K 78643K 24 0
mount 1 1K 1K 78643K 1 0
vnodes 1219 77K 77K 78643K 1266 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 1K 78643K 2 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 12 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1823 197K 290K 78643K 12980 0
file desc 4 9K 25K 78643K 117 0
sigio 0 0K 0K 78643K 1 0
proc 60 63K 95K 78643K 446 0
subproc 32 2K 2K 78643K 34 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
ip_moptions 0 0K 0K 78643K 4 0
in_multi 46 2K 2K 78643K 49 0
ether_multi 1 0K 0K 78643K 2 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 43 201K 201K 78643K 43 0
exec 0 0K 1K 78643K 225 0
pagedep 1 8K 8K 78643K 1 0
inodedep 1 32K 32K 78643K 1 0
newblk 1 0K 0K 78643K 1 0
VM swap 7 26K 26K 78643K 7 0
UVM amap 117 22K 23K 78643K 1314 0
UVM aobj 2 2K 2K 78643K 2 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 10 0
NDP 8 0K 0K 78643K 13 0
temp 90 3039K 3103K 78643K 2564 0
kqueue 4 5K 12K 78643K 19 0
SYN cache 2 16K 16K 78643K 2 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 8 0 1 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 25 0 23 1 0 1 1 0 8 0
rtentry 112 49 0 4 2 0 2 2 0 8 0
unpcb 120 73 0 63 1 0 1 1 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 415 0 415 1 1 0 1 0 8 0
tcpcb 544 88 0 84 1 0 1 1 0 8 0
inpcb 280 154 0 147 2 0 2 2 0 8 1
nd6 48 6 0 0 1 0 1 1 0 8 0
pkpcb 40 2 0 2 1 1 0 1 0 8 0
pffrent 40 4 0 4 2 1 1 1 0 8 1
pfosfp 40 846 0 423 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 16 0 2 1 0 1 1 0 8 0
pfstkey 112 16 0 2 1 0 1 1 0 8 0
pfstate 328 16 0 2 2 0 2 2 0 8 0
pfrule 1360 21 0 15 2 0 2 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 198 0 2 13 0 13 13 0 8 0
art_table 32 199 0 2 2 0 2 2 0 8 0
art_node 16 48 0 7 1 0 1 1 0 8 0
sysvmsgpl 40 14 0 7 1 0 1 1 0 8 0
semupl 112 1 0 1 1 0 1 1 0 8 1
semapl 112 10 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1549 0 143 89 0 89 89 0 8 0
ffsino 272 1549 0 143 94 0 94 94 0 8 0
nchpl 144 1881 0 276 60 0 60 60 0 8 0
uvmvnodes 72 1620 0 0 30 0 30 30 0 8 0
vnodes 208 1620 0 0 86 0 86 86 0 8 0
namei 1024 5023 0 5023 1 0 1 1 0 8 1
percpumem 16 33 0 1 1 0 1 1 0 8 0
scxspl 192 5150 0 5150 8 1 7 7 0 8 7
plimitpl 152 27 0 19 1 0 1 1 0 8 0
sigapl 424 334 0 302 4 0 4 4 0 8 0
futexpl 56 1391 0 1391 1 0 1 1 0 8 1
knotepl 112 73 0 54 1 0 1 1 0 8 0
kqueuepl 144 64 0 61 1 0 1 1 0 8 0
pipelkpl 48 83 0 73 1 0 1 1 0 8 0
pipepl 120 166 0 147 1 0 1 1 0 8 0
fdescpl 496 317 0 302 3 0 3 3 0 8 0
filepl 152 1726 0 1626 5 0 5 5 0 8 1
lockfpl 104 42 0 41 1 0 1 1 0 8 0
lockfspl 48 12 0 11 1 0 1 1 0 8 0
sessionpl 112 18 0 7 1 0 1 1 0 8 0
pgrppl 48 24 0 13 1 0 1 1 0 8 0
ucredpl 96 133 0 123 1 0 1 1 0 8 0
zombiepl 144 302 0 302 1 0 1 1 0 8 1
processpl 984 334 0 302 5 0 5 5 0 8 0
procpl 624 554 0 513 4 0 4 4 0 8 0
sosppl 128 5 0 5 1 0 1 1 0 8 1
sockpl 400 254 0 235 3 0 3 3 0 8 1
mcl64k 65536 3 0 0 1 0 1 1 0 8 0
mcl12k 12288 1 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl4k 4096 5 0 0 1 0 1 1 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 184 0 0 22 0 22 22 0 8 0
mtagpl 80 4 0 0 1 0 1 1 0 8 0
mbufpl 256 213 0 0 13 0 13 13 0 8 0
bufpl 280 3524 0 133 243 0 243 243 0 8 0
anonpl 16 49469 0 35965 69 1 68 68 0 124 13
amapchunkpl 152 1567 0 1439 8 2 6 8 0 158 0
amappl16 192 1621 0 901 49 5 44 47 0 8 8
amappl15 184 54 0 51 1 0 1 1 0 8 0
amappl14 176 23 0 18 1 0 1 1 0 8 0
amappl13 168 25 0 24 1 0 1 1 0 8 0
amappl12 160 64 0 57 1 0 1 1 0 8 0
amappl11 152 51 0 36 1 0 1 1 0 8 0
amappl10 144 21 0 16 1 0 1 1 0 8 0
amappl9 136 418 0 416 1 0 1 1 0 8 0
amappl8 128 383 0 347 2 0 2 2 0 8 0
amappl7 120 119 0 107 1 0 1 1 0 8 0
amappl6 112 23 0 19 1 0 1 1 0 8 0
amappl5 104 229 0 214 1 0 1 1 0 8 0
amappl4 96 487 0 457 1 0 1 1 0 8 0
amappl3 88 105 0 97 1 0 1 1 0 8 0
amappl2 80 1634 0 1571 2 0 2 2 0 8 0
amappl1 72 17339 0 16913 23 13 10 18 0 8 0
amappl 80 793 0 753 2 0 2 2 0 84 1
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma128 128 253 0 253 1 1 0 1 0 8 0
dma64 64 6 0 6 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 18 0 17 1 0 1 1 0 8 0
aobjpl 64 1 0 0 1 0 1 1 0 8 0
uaddrrnd 24 317 0 302 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 317 0 302 1 0 1 1 0 8 0
vmmpekpl 168 6564 0 6531 2 0 2 2 0 8 0
vmmpepl 168 45755 0 43983 110 9 101 105 0 357 18
vmsppl 368 316 0 302 2 0 2 2 0 8 0
pdppl 4096 642 0 604 6 0 6 6 0 8 0
pvpl 32 160120 0 143540 171 0 171 171 0 265 37
pmappl 232 316 0 302 2 1 1 2 0 8 0
extentpl 40 46 0 29 1 0 1 1 0 8 0
phpool 112 258 0 2 8 0 8 8 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffed640, count: -1
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,69) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,69) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,69) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(69) at cnputc+0x4c sys/dev/cons.c:239
kputchar(69,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff821f63fd) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821f63fd) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82653a00) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82653a00) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82653a00,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
tcp_output(ffff800000a0c320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eb24c88,9,fffffd806d91fc00,0,0,ffff800020ed1390) at tcp_usrreq+0xa55
end trace frame: 0xffff800020ed7c10, count: 0
ddb{1}> trace
x86_ipi_db(ffff800020e00ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,69) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,69) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,69) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(69) at cnputc+0x4c sys/dev/cons.c:239
kputchar(69,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff821f63fd) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821f63fd) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82653a00) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82653a00) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82653a00,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283
tcp_output(ffff800000a0c320) at tcp_output+0x14e6
tcp_usrreq(fffffd806eb24c88,9,fffffd806d91fc00,0,0,ffff800020ed1390) at tcp_usrreq+0xa55
sosend(fffffd806eb24c88,0,ffff800020ed7cd8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020ed1390,4,ffff800020ed7cd8,0,ffff800020ed7dc0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020ed1390,ffff800020ed7d70,ffff800020ed7dc0) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020ed7e40) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020ed7e40) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffb9bc0, count: -19
---
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Anton Lindqvist
May 11, 2020, 6:48:19 PM5/11/20
to syzbot, syzkaller-o...@googlegroups.com
#syz dup: pool: cpu free list modified: mbufpl
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