panic: pWoAolRN_IcaNGc:h eS_PiLt eNmO_Tm aLgOiWcE_RcEhDe cOkN: mSYbSuCfApLlL c1pu37 fr-3e4e0 8l0i sEt XImTod 0i f9
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syzbot
Jun 25, 2020, 4:18:16 AM6/25/20
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 3209772d kernel: use gettime(9)/getuptime(9) in lieu of ti..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=14971cf9100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=0f1c32e33cfa57717d31
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+0f1c32...@syzkaller.appspotmail.com
login: panic: pWoAolRN_IcaNGc:h eS_PiLt eNmO_Tm aLgOiWcE_RcEhDe cOkN: mSYbSuCfApLlL c1pu37 fr-3e4e0 8l0i sEt XImTod 0i f9
i
edStopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*349012 65528 0 0x2 0 0 syz-executor.1
128328 35620 0 0x12 0 1 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffff7ad0, 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 0xfffffd80695f2400+16 0x0!=0xff2ba208f8b18d28
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffff7ad0, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800020efb950
rbx 0
rdx 0x8b
rcx 0x2
rax 0x38
r8 0xffffffff817e707f kprintf+0x16f
r9 0x1
r10 0x2
r11 0x5375b48e5627a94a
r12 0
r13 0
r14 0xffff800020ddd868
r15 0
rip 0xffffffff820843f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800020efb8d0
ss 0x10
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.1) pid=349012 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=17, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800020dddad8,0xffff800020e293a8
process=0xffff800020df1720 user=0xffff800020ef6000, vmspace=0xfffffd807f000000
estcpu=36, cpticks=2, pctcpu=0.4
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
57159 202006 81612 0 2 0 syz-executor.0
57159 458179 81612 0 3 0x4000080 netcon2 syz-executor.0
57159 416424 81612 0 2 0x4000000 syz-executor.0
84430 471862 0 0 3 0x14200 bored sosplice
*65528 349012 21847 0 7 0x2 syz-executor.1
81612 372113 21847 0 3 0x82 nanosleep syz-executor.0
21847 274003 2471 0 3 0x82 thrsleep syz-fuzzer
21847 239888 2471 0 3 0x4000082 nanosleep syz-fuzzer
21847 403083 2471 0 3 0x4000082 thrsleep syz-fuzzer
21847 153653 2471 0 3 0x4000082 nanosleep syz-fuzzer
21847 450908 2471 0 3 0x4000082 thrsleep syz-fuzzer
21847 429225 2471 0 3 0x4000082 thrsleep syz-fuzzer
21847 465649 2471 0 3 0x4000082 thrsleep syz-fuzzer
21847 310233 2471 0 3 0x4000082 kqread syz-fuzzer
21847 305951 2471 0 3 0x4000082 thrsleep syz-fuzzer
21847 180834 2471 0 3 0x4000082 thrsleep syz-fuzzer
2471 454956 35620 0 3 0x10008a pause ksh
35620 128328 56872 0 7 0x12 sshd
21567 136596 1 0 3 0x100083 ttyin getty
56872 286034 1 0 3 0x80 select sshd
91425 489120 65321 74 3 0x100092 bpf pflogd
65321 6019 1 0 3 0x80 netio pflogd
45500 510406 83955 73 3 0x100090 kqread syslogd
83955 120351 1 0 3 0x100082 netio syslogd
42769 280823 1 77 3 0x100090 poll dhclient
36060 269288 1 0 3 0x80 poll dhclient
90725 388432 0 0 3 0x14200 bored smr
57721 421193 0 0 2 0x14200 zerothread
88406 153332 0 0 3 0x14200 aiodoned aiodoned
11641 258065 0 0 3 0x14200 syncer update
11526 456737 0 0 3 0x14200 cleaner cleaner
40401 502579 0 0 3 0x14200 reaper reaper
58972 233993 0 0 3 0x14200 pgdaemon pagedaemon
28478 366818 0 0 3 0x14200 bored crynlk
4017 323935 0 0 3 0x14200 bored crypto
27375 282923 0 0 3 0x40014200 acpi0 acpi0
79609 406934 0 0 3 0x40014200 idle1
12060 361456 0 0 3 0x14200 bored softnet
68872 38676 0 0 3 0x14200 bored systqmp
15898 248649 0 0 3 0x14200 bored systq
36014 333389 0 0 3 0x40014200 bored softclock
5328 328932 0 0 3 0x40014200 idle0
1 189729 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:473
#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 65528 (syz-executor.1) thread 0xffff800020ddd868 (349012)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828cb930)
#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 (0xfffffd806e690098)
#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 (0xfffffd806b2071a8)
#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:473
#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 35620 (sshd) thread 0xffff800020e40eb0 (128328)
exclusive rwlock netlock r = 0 (0xffffffff826fbc18)
#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:543
#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 9497 6408K 6795K 78643K 10720 0
pcb 13 8K 8K 78643K 38 0
rtable 110 3K 6K 78643K 261 0
ifaddr 67 14K 14K 78643K 94 0
counters 43 33K 34K 78643K 45 0
ioctlops 0 0K 4K 78643K 1499 0
iov 0 0K 12K 78643K 17 0
mount 1 1K 1K 78643K 1 0
vnodes 1219 77K 77K 78643K 1260 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 4 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 20 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 157 0
sigio 0 0K 0K 78643K 2 0
proc 61 63K 83K 78643K 456 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 65 3K 3K 78643K 77 0
ether_multi 1 0K 0K 78643K 3 0
mrt 0 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 223 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 119 38K 40K 78643K 1441 0
UVM aobj 7 2K 2K 78643K 7 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 9 0K 0K 78643K 16 0
temp 80 3852K 3928K 78643K 6656 0
kqueue 3 4K 9K 78643K 18 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 6 0 0 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 27 0 25 1 0 1 1 0 8 0
rtentry 112 50 0 4 2 0 2 2 0 8 0
unpcb 120 104 0 94 1 0 1 1 0 8 0
syncache 264 6 0 6 2 2 0 1 0 8 0
tcpqe 32 159 0 159 1 1 0 1 0 8 0
tcpcb 544 50 0 45 1 0 1 1 0 8 0
inpcb 296 356 0 348 2 0 2 2 0 8 1
rttmr 72 1 0 1 1 0 1 1 0 8 1
nd6 48 9 0 2 1 0 1 1 0 8 0
pkpcb 40 2 0 2 1 0 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
pfrktable 1344 17 0 17 1 0 1 1 0 8 1
pftag 88 2 0 2 1 0 1 1 0 8 1
pfstitem 24 14 0 3 1 0 1 1 0 8 0
pfstkey 112 14 0 3 1 0 1 1 0 8 0
pfstate 328 14 0 3 2 0 2 2 0 8 0
pfrule 1360 31 0 24 2 1 1 2 0 8 0
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 200 0 0 13 0 13 13 0 8 0
art_table 32 202 0 0 2 0 2 2 0 8 0
art_node 16 49 0 7 1 0 1 1 0 8 0
semupl 112 5 0 5 1 0 1 1 0 8 1
semapl 112 18 0 8 1 0 1 1 0 8 0
shmpl 112 5 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1593 0 189 89 0 89 89 0 8 0
ffsino 272 1593 0 189 94 0 94 94 0 8 0
nchpl 144 1989 0 381 60 0 60 60 0 8 0
uvmvnodes 72 1660 0 0 31 0 31 31 0 8 0
vnodes 208 1660 0 0 88 0 88 88 0 8 0
namei 1024 5273 0 5273 1 0 1 1 0 8 1
percpumem 16 33 0 1 1 0 1 1 0 8 0
vcpupl 1984 2 0 0 1 0 1 1 0 8 0
vmpool 560 2 0 0 1 0 1 1 0 8 0
pfiaddrpl 120 4 0 4 1 0 1 1 0 8 1
scxspl 192 6155 0 6155 8 2 6 7 0 8 6
plimitpl 152 19 0 11 1 0 1 1 0 8 0
sigapl 424 373 0 341 4 0 4 4 0 8 0
futexpl 56 1860 0 1860 1 0 1 1 0 8 1
knotepl 112 79 0 60 1 0 1 1 0 8 0
kqueuepl 144 26 0 24 1 0 1 1 0 8 0
pipelkpl 48 94 0 84 1 0 1 1 0 8 0
pipepl 120 188 0 169 1 0 1 1 0 8 0
fdescpl 496 357 0 341 4 1 3 3 0 8 1
filepl 152 1992 0 1891 5 0 5 5 0 8 1
lockfpl 104 20 0 19 1 0 1 1 0 8 0
lockfspl 48 8 0 7 1 0 1 1 0 8 0
sessionpl 112 18 0 7 1 0 1 1 0 8 0
pgrppl 48 18 0 7 1 0 1 1 0 8 0
ucredpl 96 143 0 134 1 0 1 1 0 8 0
zombiepl 144 341 0 341 1 0 1 1 0 8 1
processpl 984 373 0 341 5 0 5 5 0 8 0
procpl 624 668 0 625 4 0 4 4 0 8 0
sosppl 128 6 0 6 1 0 1 1 0 8 1
sockpl 400 489 0 469 4 0 4 4 0 8 1
mcl64k 65536 5 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 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
mcl8k 8192 1 0 0 1 0 1 1 0 8 0
mcl4k 4096 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 177 0 0 22 0 22 22 0 8 0
mtagpl 96 7 0 0 1 0 1 1 0 8 0
mbufpl 256 180 0 0 11 0 11 11 0 8 0
bufpl 280 3810 0 133 263 0 263 263 0 8 0
anonpl 16 52757 0 36645 82 1 81 81 0 124 15
amapchunkpl 152 2081 0 1930 10 0 10 10 0 158 3
amappl16 192 1841 0 977 55 4 51 55 0 8 7
amappl15 184 62 0 59 1 0 1 1 0 8 0
amappl14 176 87 0 82 1 0 1 1 0 8 0
amappl13 168 28 0 25 1 0 1 1 0 8 0
amappl12 160 9 0 5 1 0 1 1 0 8 0
amappl11 152 54 0 38 1 0 1 1 0 8 0
amappl10 144 18 0 12 1 0 1 1 0 8 0
amappl9 136 389 0 387 1 0 1 1 0 8 0
amappl8 128 359 0 329 2 0 2 2 0 8 0
amappl7 120 117 0 107 1 0 1 1 0 8 0
amappl6 112 32 0 24 1 0 1 1 0 8 0
amappl5 104 270 0 252 1 0 1 1 0 8 0
amappl4 96 492 0 461 1 0 1 1 0 8 0
amappl3 88 169 0 164 1 0 1 1 0 8 0
amappl2 80 1974 0 1905 2 0 2 2 0 8 0
amappl1 72 17940 0 17493 23 13 10 18 0 8 0
amappl 80 923 0 876 2 0 2 2 0 84 0
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 6 0 0 1 0 1 1 0 8 0
uaddrrnd 24 359 0 341 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 359 0 341 1 0 1 1 0 8 0
vmmpekpl 168 6817 0 6788 2 0 2 2 0 8 0
vmmpepl 168 50620 0 48592 111 8 103 107 0 357 10
vmsppl 368 358 0 341 2 0 2 2 0 8 0
pdppl 4096 725 0 684 6 0 6 6 0 8 0
pvpl 32 169381 0 150129 192 0 192 192 0 265 35
pmappl 232 358 0 341 2 0 2 2 0 8 1
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 260 0 3 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: 0x7f7fffff7ad0, count: -1
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020d70ff0) 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_read_1(800,64) at x86_bus_space_io_read_1
cnputc(64) at cnputc+0x4c sys/dev/cons.c:239
kputchar(64,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff823fdf6d) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823fdf6d) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff8291f248) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff8291f248) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff8291f248,2) 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(ffff800000ad9760) at tcp_output+0x14e6
tcp_usrreq(fffffd806eae1af8,9,fffffd806c9b2100,0,0,ffff800020e40eb0) at tcp_usrreq+0xa55
sosend(fffffd806eae1af8,0,ffff800020e22f28,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555
end trace frame: 0xffff800020e22f10, count: 0
ddb{1}> trace
x86_ipi_db(ffff800020d70ff0) 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_read_1(800,64) at x86_bus_space_io_read_1
cnputc(64) at cnputc+0x4c sys/dev/cons.c:239
kputchar(64,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff823fdf6d) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823fdf6d) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff8291f248) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff8291f248) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff8291f248,2) 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(ffff800000ad9760) at tcp_output+0x14e6
tcp_usrreq(fffffd806eae1af8,9,fffffd806c9b2100,0,0,ffff800020e40eb0) at tcp_usrreq+0xa55
sosend(fffffd806eae1af8,0,ffff800020e22f28,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555
dofilewritev(ffff800020e40eb0,4,ffff800020e22f28,0,ffff800020e23010) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020e40eb0,ffff800020e22fc0,ffff800020e23010) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e23090) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e23090) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffbb640, count: -18
---
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: 3209772d kernel: use gettime(9)/getuptime(9) in lieu of ti..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=14971cf9100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=0f1c32e33cfa57717d31
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+0f1c32...@syzkaller.appspotmail.com
login: panic: pWoAolRN_IcaNGc:h eS_PiLt eNmO_Tm aLgOiWcE_RcEhDe cOkN: mSYbSuCfApLlL c1pu37 fr-3e4e0 8l0i sEt XImTod 0i f9
i
edStopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*349012 65528 0 0x2 0 0 syz-executor.1
128328 35620 0 0x12 0 1 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffff7ad0, 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 0xfffffd80695f2400+16 0x0!=0xff2ba208f8b18d28
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7fffff7ad0, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800020efb950
rbx 0
rdx 0x8b
rcx 0x2
rax 0x38
r8 0xffffffff817e707f kprintf+0x16f
r9 0x1
r10 0x2
r11 0x5375b48e5627a94a
r12 0
r13 0
r14 0xffff800020ddd868
r15 0
rip 0xffffffff820843f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800020efb8d0
ss 0x10
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.1) pid=349012 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=17, usrpri=86, nice=20
forw=0xffffffffffffffff, list=0xffff800020dddad8,0xffff800020e293a8
process=0xffff800020df1720 user=0xffff800020ef6000, vmspace=0xfffffd807f000000
estcpu=36, cpticks=2, pctcpu=0.4
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
57159 202006 81612 0 2 0 syz-executor.0
57159 458179 81612 0 3 0x4000080 netcon2 syz-executor.0
57159 416424 81612 0 2 0x4000000 syz-executor.0
84430 471862 0 0 3 0x14200 bored sosplice
*65528 349012 21847 0 7 0x2 syz-executor.1
81612 372113 21847 0 3 0x82 nanosleep syz-executor.0
21847 274003 2471 0 3 0x82 thrsleep syz-fuzzer
21847 239888 2471 0 3 0x4000082 nanosleep syz-fuzzer
21847 403083 2471 0 3 0x4000082 thrsleep syz-fuzzer
21847 153653 2471 0 3 0x4000082 nanosleep syz-fuzzer
21847 450908 2471 0 3 0x4000082 thrsleep syz-fuzzer
21847 429225 2471 0 3 0x4000082 thrsleep syz-fuzzer
21847 465649 2471 0 3 0x4000082 thrsleep syz-fuzzer
21847 310233 2471 0 3 0x4000082 kqread syz-fuzzer
21847 305951 2471 0 3 0x4000082 thrsleep syz-fuzzer
21847 180834 2471 0 3 0x4000082 thrsleep syz-fuzzer
2471 454956 35620 0 3 0x10008a pause ksh
35620 128328 56872 0 7 0x12 sshd
21567 136596 1 0 3 0x100083 ttyin getty
56872 286034 1 0 3 0x80 select sshd
91425 489120 65321 74 3 0x100092 bpf pflogd
65321 6019 1 0 3 0x80 netio pflogd
45500 510406 83955 73 3 0x100090 kqread syslogd
83955 120351 1 0 3 0x100082 netio syslogd
42769 280823 1 77 3 0x100090 poll dhclient
36060 269288 1 0 3 0x80 poll dhclient
90725 388432 0 0 3 0x14200 bored smr
57721 421193 0 0 2 0x14200 zerothread
88406 153332 0 0 3 0x14200 aiodoned aiodoned
11641 258065 0 0 3 0x14200 syncer update
11526 456737 0 0 3 0x14200 cleaner cleaner
40401 502579 0 0 3 0x14200 reaper reaper
58972 233993 0 0 3 0x14200 pgdaemon pagedaemon
28478 366818 0 0 3 0x14200 bored crynlk
4017 323935 0 0 3 0x14200 bored crypto
27375 282923 0 0 3 0x40014200 acpi0 acpi0
79609 406934 0 0 3 0x40014200 idle1
12060 361456 0 0 3 0x14200 bored softnet
68872 38676 0 0 3 0x14200 bored systqmp
15898 248649 0 0 3 0x14200 bored systq
36014 333389 0 0 3 0x40014200 bored softclock
5328 328932 0 0 3 0x40014200 idle0
1 189729 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:473
#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 65528 (syz-executor.1) thread 0xffff800020ddd868 (349012)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828cb930)
#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 (0xfffffd806e690098)
#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 (0xfffffd806b2071a8)
#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:473
#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 35620 (sshd) thread 0xffff800020e40eb0 (128328)
exclusive rwlock netlock r = 0 (0xffffffff826fbc18)
#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:543
#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 9497 6408K 6795K 78643K 10720 0
pcb 13 8K 8K 78643K 38 0
rtable 110 3K 6K 78643K 261 0
ifaddr 67 14K 14K 78643K 94 0
counters 43 33K 34K 78643K 45 0
ioctlops 0 0K 4K 78643K 1499 0
iov 0 0K 12K 78643K 17 0
mount 1 1K 1K 78643K 1 0
vnodes 1219 77K 77K 78643K 1260 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 4 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 20 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 5 13K 25K 78643K 157 0
sigio 0 0K 0K 78643K 2 0
proc 61 63K 83K 78643K 456 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 65 3K 3K 78643K 77 0
ether_multi 1 0K 0K 78643K 3 0
mrt 0 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 223 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 119 38K 40K 78643K 1441 0
UVM aobj 7 2K 2K 78643K 7 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 9 0K 0K 78643K 16 0
temp 80 3852K 3928K 78643K 6656 0
kqueue 3 4K 9K 78643K 18 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 6 0 0 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 80 27 0 25 1 0 1 1 0 8 0
rtentry 112 50 0 4 2 0 2 2 0 8 0
unpcb 120 104 0 94 1 0 1 1 0 8 0
syncache 264 6 0 6 2 2 0 1 0 8 0
tcpqe 32 159 0 159 1 1 0 1 0 8 0
tcpcb 544 50 0 45 1 0 1 1 0 8 0
inpcb 296 356 0 348 2 0 2 2 0 8 1
rttmr 72 1 0 1 1 0 1 1 0 8 1
nd6 48 9 0 2 1 0 1 1 0 8 0
pkpcb 40 2 0 2 1 0 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
pfrktable 1344 17 0 17 1 0 1 1 0 8 1
pftag 88 2 0 2 1 0 1 1 0 8 1
pfstitem 24 14 0 3 1 0 1 1 0 8 0
pfstkey 112 14 0 3 1 0 1 1 0 8 0
pfstate 328 14 0 3 2 0 2 2 0 8 0
pfrule 1360 31 0 24 2 1 1 2 0 8 0
art_heap8 4096 2 0 0 2 0 2 2 0 8 0
art_heap4 256 200 0 0 13 0 13 13 0 8 0
art_table 32 202 0 0 2 0 2 2 0 8 0
art_node 16 49 0 7 1 0 1 1 0 8 0
semupl 112 5 0 5 1 0 1 1 0 8 1
semapl 112 18 0 8 1 0 1 1 0 8 0
shmpl 112 5 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1593 0 189 89 0 89 89 0 8 0
ffsino 272 1593 0 189 94 0 94 94 0 8 0
nchpl 144 1989 0 381 60 0 60 60 0 8 0
uvmvnodes 72 1660 0 0 31 0 31 31 0 8 0
vnodes 208 1660 0 0 88 0 88 88 0 8 0
namei 1024 5273 0 5273 1 0 1 1 0 8 1
percpumem 16 33 0 1 1 0 1 1 0 8 0
vcpupl 1984 2 0 0 1 0 1 1 0 8 0
vmpool 560 2 0 0 1 0 1 1 0 8 0
pfiaddrpl 120 4 0 4 1 0 1 1 0 8 1
scxspl 192 6155 0 6155 8 2 6 7 0 8 6
plimitpl 152 19 0 11 1 0 1 1 0 8 0
sigapl 424 373 0 341 4 0 4 4 0 8 0
futexpl 56 1860 0 1860 1 0 1 1 0 8 1
knotepl 112 79 0 60 1 0 1 1 0 8 0
kqueuepl 144 26 0 24 1 0 1 1 0 8 0
pipelkpl 48 94 0 84 1 0 1 1 0 8 0
pipepl 120 188 0 169 1 0 1 1 0 8 0
fdescpl 496 357 0 341 4 1 3 3 0 8 1
filepl 152 1992 0 1891 5 0 5 5 0 8 1
lockfpl 104 20 0 19 1 0 1 1 0 8 0
lockfspl 48 8 0 7 1 0 1 1 0 8 0
sessionpl 112 18 0 7 1 0 1 1 0 8 0
pgrppl 48 18 0 7 1 0 1 1 0 8 0
ucredpl 96 143 0 134 1 0 1 1 0 8 0
zombiepl 144 341 0 341 1 0 1 1 0 8 1
processpl 984 373 0 341 5 0 5 5 0 8 0
procpl 624 668 0 625 4 0 4 4 0 8 0
sosppl 128 6 0 6 1 0 1 1 0 8 1
sockpl 400 489 0 469 4 0 4 4 0 8 1
mcl64k 65536 5 0 0 1 0 1 1 0 8 0
mcl16k 16384 1 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
mcl8k 8192 1 0 0 1 0 1 1 0 8 0
mcl4k 4096 3 0 0 1 0 1 1 0 8 0
mcl2k 2048 177 0 0 22 0 22 22 0 8 0
mtagpl 96 7 0 0 1 0 1 1 0 8 0
mbufpl 256 180 0 0 11 0 11 11 0 8 0
bufpl 280 3810 0 133 263 0 263 263 0 8 0
anonpl 16 52757 0 36645 82 1 81 81 0 124 15
amapchunkpl 152 2081 0 1930 10 0 10 10 0 158 3
amappl16 192 1841 0 977 55 4 51 55 0 8 7
amappl15 184 62 0 59 1 0 1 1 0 8 0
amappl14 176 87 0 82 1 0 1 1 0 8 0
amappl13 168 28 0 25 1 0 1 1 0 8 0
amappl12 160 9 0 5 1 0 1 1 0 8 0
amappl11 152 54 0 38 1 0 1 1 0 8 0
amappl10 144 18 0 12 1 0 1 1 0 8 0
amappl9 136 389 0 387 1 0 1 1 0 8 0
amappl8 128 359 0 329 2 0 2 2 0 8 0
amappl7 120 117 0 107 1 0 1 1 0 8 0
amappl6 112 32 0 24 1 0 1 1 0 8 0
amappl5 104 270 0 252 1 0 1 1 0 8 0
amappl4 96 492 0 461 1 0 1 1 0 8 0
amappl3 88 169 0 164 1 0 1 1 0 8 0
amappl2 80 1974 0 1905 2 0 2 2 0 8 0
amappl1 72 17940 0 17493 23 13 10 18 0 8 0
amappl 80 923 0 876 2 0 2 2 0 84 0
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 6 0 0 1 0 1 1 0 8 0
uaddrrnd 24 359 0 341 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 359 0 341 1 0 1 1 0 8 0
vmmpekpl 168 6817 0 6788 2 0 2 2 0 8 0
vmmpepl 168 50620 0 48592 111 8 103 107 0 357 10
vmsppl 368 358 0 341 2 0 2 2 0 8 0
pdppl 4096 725 0 684 6 0 6 6 0 8 0
pvpl 32 169381 0 150129 192 0 192 192 0 265 35
pmappl 232 358 0 341 2 0 2 2 0 8 1
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 260 0 3 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: 0x7f7fffff7ad0, count: -1
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020d70ff0) 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_read_1(800,64) at x86_bus_space_io_read_1
cnputc(64) at cnputc+0x4c sys/dev/cons.c:239
kputchar(64,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff823fdf6d) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823fdf6d) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff8291f248) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff8291f248) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff8291f248,2) 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(ffff800000ad9760) at tcp_output+0x14e6
tcp_usrreq(fffffd806eae1af8,9,fffffd806c9b2100,0,0,ffff800020e40eb0) at tcp_usrreq+0xa55
sosend(fffffd806eae1af8,0,ffff800020e22f28,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555
end trace frame: 0xffff800020e22f10, count: 0
ddb{1}> trace
x86_ipi_db(ffff800020d70ff0) 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_read_1(800,64) at x86_bus_space_io_read_1
cnputc(64) at cnputc+0x4c sys/dev/cons.c:239
kputchar(64,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff823fdf6d) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff823fdf6d) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff8291f248) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff8291f248) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff8291f248,2) 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(ffff800000ad9760) at tcp_output+0x14e6
tcp_usrreq(fffffd806eae1af8,9,fffffd806c9b2100,0,0,ffff800020e40eb0) at tcp_usrreq+0xa55
sosend(fffffd806eae1af8,0,ffff800020e22f28,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555
dofilewritev(ffff800020e40eb0,4,ffff800020e22f28,0,ffff800020e23010) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020e40eb0,ffff800020e22fc0,ffff800020e23010) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e23090) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e23090) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffbb640, count: -18
---
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Anton Lindqvist
Jun 28, 2020, 4:30:55 AM6/28/20
to syzbot, syzkaller-o...@googlegroups.com
#syz dup: pool: cpu free list modified: mbufpl
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