panic: pWoAoRNlI_cNGac: hSeP_iL teNOmT_ maLOgWiEcR_EcDh eOcNk :SY SmCbuALfpLl 13c7p u -f17r4e6e8 8l isEXt ImT od0 if9
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syzbot
May 31, 2020, 11:22:16 PM5/31/20
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 33ca237a OIDs are unsigned. Reflect this when printing them.
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=149b5d16100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=ecc8887fa10560fe3a24
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+ecc888...@syzkaller.appspotmail.com
panic: pWoAoRNlI_cNGac: hSeP_iL teNOmT_ maLOgWiEcR_EcDh eOcNk :SY SmCbuALfpLl 13c7p u -f17r4e6e8 8l isEXt ImT od0 if9
i
edStopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 41880 10341 0 0x2 0 0 syz-executor.1
437741 67396 0 0x12 0 1 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffd5590, 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 0xfffffd806f335d00+24 0x308c24ff0e6093cf!=0x308c247f65ef6fcf
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffd5590, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff80002319b2c0
rbx 0
rdx 0x8b
rcx 0x2
rax 0x39
r8 0xffffffff81b6be4f kprintf+0x16f
r9 0x1
r10 0x2
r11 0xba22c4dd06e05f9
r12 0
r13 0
r14 0xffff800020ed9608
r15 0
rip 0xffffffff81fe03f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff80002319b240
ss 0x10
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.1) pid=41880 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=17, usrpri=77, nice=20
forw=0xffffffffffffffff, list=0xffff800020e6dd48,0xffff800020ed93a8
process=0xffff800020e80f70 user=0xffff800023196000, vmspace=0xfffffd807f0008a0
estcpu=36, cpticks=3, pctcpu=0.17
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
44564 434762 0 0 3 0x14200 bored sosplice
*10341 41880 82602 0 7 0x2 syz-executor.1
11966 313045 82602 0 2 0x2 syz-executor.0
82602 492944 40266 0 3 0x82 thrsleep syz-fuzzer
82602 208662 40266 0 3 0x4000082 nanosleep syz-fuzzer
82602 54542 40266 0 3 0x4000082 thrsleep syz-fuzzer
82602 388723 40266 0 3 0x4000082 kqread syz-fuzzer
82602 297218 40266 0 3 0x4000082 thrsleep syz-fuzzer
82602 494575 40266 0 3 0x4000082 thrsleep syz-fuzzer
82602 484387 40266 0 3 0x4000082 thrsleep syz-fuzzer
82602 522278 40266 0 3 0x4000082 thrsleep syz-fuzzer
82602 215059 40266 0 3 0x4000082 thrsleep syz-fuzzer
82602 253119 40266 0 3 0x4000082 nanosleep syz-fuzzer
40266 411967 67396 0 3 0x10008a pause ksh
67396 437741 90153 0 7 0x12 sshd
6070 393548 1 0 3 0x100083 ttyin getty
90153 167426 1 0 3 0x80 select sshd
4984 370207 85684 74 3 0x100092 bpf pflogd
85684 218965 1 0 3 0x80 netio pflogd
89222 453710 78054 73 3 0x100090 kqread syslogd
78054 147620 1 0 3 0x100082 netio syslogd
88106 74406 1 77 3 0x100090 poll dhclient
25105 143891 1 0 3 0x80 poll dhclient
97611 247389 0 0 3 0x14200 bored smr
36766 252501 0 0 3 0x14200 pgzero zerothread
11393 516093 0 0 3 0x14200 aiodoned aiodoned
55206 386387 0 0 3 0x14200 syncer update
67634 403772 0 0 3 0x14200 cleaner cleaner
5719 41797 0 0 3 0x14200 reaper reaper
28081 4042 0 0 3 0x14200 pgdaemon pagedaemon
16086 296453 0 0 3 0x14200 bored crynlk
64609 250503 0 0 3 0x14200 bored crypto
81741 520660 0 0 3 0x40014200 acpi0 acpi0
70759 152172 0 0 3 0x40014200 idle1
54880 111543 0 0 2 0x14200 softnet
59455 92862 0 0 3 0x14200 bored systqmp
93669 369869 0 0 3 0x14200 bored systq
17474 442592 0 0 3 0x40014200 bored softclock
46775 131592 0 0 3 0x40014200 idle0
1 58738 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_queue+0x28 sys/kern/kern_bufq.c:182
#4 sdstrategy+0x178 sys/scsi/sd.c:585
#5 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#6 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#7 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#8 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#9 ffs_truncate+0xc76
#10 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1355
#11 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#12 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#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
Process 10341 (syz-executor.1) thread 0xffff800020ed9608 (41880)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82643b30)
#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 getblk+0x14c sys/kern/vfs_bio.c:1019
#7 bread+0x3a bio_doread sys/kern/vfs_bio.c:435 [inline]
#7 bread+0x3a sys/kern/vfs_bio.c:480
#8 ffs_update+0x14a sys/ufs/ffs/ffs_inode.c:91
#9 ffs_truncate+0xc76
#10 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1355
#11 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#12 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#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 (0xfffffd8068be4c50)
#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 (0xfffffd8068be40a0)
#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_queue+0x28 sys/kern/kern_bufq.c:182
#4 sdstrategy+0x178 sys/scsi/sd.c:585
#5 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#6 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#7 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#8 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#9 ffs_truncate+0xc76
#10 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1355
#11 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#12 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#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
Process 67396 (sshd) thread 0xffff800020ed1ae0 (437741)
exclusive rwlock netlock r = 0 (0xffffffff824a2628)
#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 9482 6401K 6798K 78643K 10797 0
pcb 13 8K 8K 78643K 33 0
rtable 102 3K 4K 78643K 248 0
ifaddr 50 11K 12K 78643K 81 0
counters 43 33K 34K 78643K 55 0
ioctlops 0 0K 4K 78643K 1479 0
iov 0 0K 16K 78643K 12 0
mount 1 1K 1K 78643K 1 0
vnodes 1219 77K 77K 78643K 1294 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 3 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 22 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 4 9K 25K 78643K 131 0
sigio 0 0K 0K 78643K 2 0
proc 60 63K 95K 78643K 439 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 14 0
in_multi 39 2K 2K 78643K 50 0
ether_multi 1 0K 0K 78643K 5 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 37 175K 175K 78643K 37 0
exec 0 0K 1K 78643K 218 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 113 22K 22K 78643K 1349 0
UVM aobj 8 2K 2K 78643K 8 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 9 0
NDP 7 0K 0K 78643K 17 0
temp 71 3032K 3096K 78643K 2969 0
kqueue 3 4K 8K 78643K 7 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 2 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 47 0 6 2 0 2 2 0 8 0
unpcb 120 81 0 71 1 0 1 1 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 536 0 536 1 1 0 1 0 8 0
tcpcb 544 40 0 36 1 0 1 1 0 8 0
inpcb 280 125 0 118 2 0 2 2 0 8 1
nd6 48 6 0 0 1 0 1 1 0 8 0
ppxss 1128 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
pfstitem 24 17 0 1 1 0 1 1 0 8 0
pfstkey 112 17 0 1 1 0 1 1 0 8 0
pfstate 328 17 0 1 2 0 2 2 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 200 0 10 13 0 13 13 0 8 0
art_table 32 201 0 10 2 0 2 2 0 8 0
art_node 16 46 0 9 1 0 1 1 0 8 0
semapl 112 20 0 10 1 0 1 1 0 8 0
shmpl 112 6 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1576 0 171 89 0 89 89 0 8 0
ffsino 272 1576 0 171 95 1 94 94 0 8 0
nchpl 144 2008 0 414 60 0 60 60 0 8 0
uvmvnodes 72 1664 0 0 31 0 31 31 0 8 0
vnodes 208 1664 0 0 88 0 88 88 0 8 0
namei 1024 5294 0 5294 1 0 1 1 0 8 1
percpumem 16 38 0 6 1 0 1 1 0 8 0
vmpool 560 2 0 2 1 1 0 1 0 8 0
scxspl 192 5060 0 5060 8 3 5 7 0 8 5
plimitpl 152 23 0 15 1 0 1 1 0 8 0
sigapl 424 347 0 316 4 0 4 4 0 8 0
futexpl 56 1482 0 1482 1 0 1 1 0 8 1
knotepl 112 65 0 46 1 0 1 1 0 8 0
kqueuepl 144 16 0 14 1 0 1 1 0 8 0
pipelkpl 48 81 0 71 1 0 1 1 0 8 0
pipepl 120 162 0 143 1 0 1 1 0 8 0
fdescpl 496 331 0 316 3 0 3 3 0 8 0
filepl 152 1878 0 1778 5 0 5 5 0 8 1
lockfpl 104 32 0 31 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 18 0 7 1 0 1 1 0 8 0
ucredpl 96 175 0 166 1 0 1 1 0 8 0
zombiepl 144 316 0 316 1 0 1 1 0 8 1
processpl 984 347 0 316 5 0 5 5 0 8 0
procpl 624 582 0 542 4 0 4 4 0 8 0
sosppl 128 2 0 2 1 0 1 1 0 8 1
sockpl 400 233 0 214 4 0 4 4 0 8 2
mcl64k 65536 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 3 0 0 1 0 1 1 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 209 0 0 26 0 26 26 0 8 0
mtagpl 80 23 0 0 1 0 1 1 0 8 0
mbufpl 256 252 0 0 15 0 15 15 0 8 0
bufpl 280 3422 0 133 235 0 235 235 0 8 0
anonpl 16 44362 0 29405 62 1 61 61 0 124 0
amapchunkpl 152 1606 0 1458 8 1 7 8 0 158 0
amappl16 192 1296 0 506 40 0 40 40 0 8 0
amappl15 184 9 0 8 2 1 1 1 0 8 0
amappl14 176 72 0 67 1 0 1 1 0 8 0
amappl13 168 29 0 26 1 0 1 1 0 8 0
amappl12 160 52 0 49 2 1 1 1 0 8 0
amappl11 152 59 0 43 1 0 1 1 0 8 0
amappl10 144 20 0 14 1 0 1 1 0 8 0
amappl9 136 437 0 434 1 0 1 1 0 8 0
amappl8 128 413 0 380 2 0 2 2 0 8 0
amappl7 120 117 0 105 1 0 1 1 0 8 0
amappl6 112 32 0 25 2 1 1 1 0 8 0
amappl5 104 185 0 169 1 0 1 1 0 8 0
amappl4 96 532 0 506 1 0 1 1 0 8 0
amappl3 88 151 0 145 1 0 1 1 0 8 0
amappl2 80 1701 0 1639 2 0 2 2 0 8 0
amappl1 72 17165 0 16737 23 13 10 18 0 8 0
amappl 80 836 0 792 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 7 0 0 1 0 1 1 0 8 0
uaddrrnd 24 333 0 318 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 333 0 318 1 0 1 1 0 8 0
vmmpekpl 168 6541 0 6510 2 0 2 2 0 8 0
vmmpepl 168 47116 0 45277 117 11 106 109 0 357 19
vmsppl 368 332 0 318 2 0 2 2 0 8 0
pdppl 4096 674 0 636 6 0 6 6 0 8 0
pvpl 32 155534 0 137533 149 0 149 149 0 265 2
pmappl 232 332 0 318 2 1 1 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 267 0 4 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: 0x7f7ffffd5590, 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(3f8,0,64) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,64) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,64) at comcnputc+0x131 sys/dev/ic/com.c:1254
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(ffffffff821fcb20) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821fcb20) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82682fc0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82682fc0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82682fc0,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd806f335e00,774,cc,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd806f335e00,774,cc,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
tcp_output(ffff800000a0b320) at tcp_output+0x15ba sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd806eb54af8,9,fffffd806f335500,0,0,ffff800020ed1ae0) at tcp_usrreq+0xa55
end trace frame: 0xffff800020ed70b0, 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(3f8,0,64) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,64) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,64) at comcnputc+0x131 sys/dev/ic/com.c:1254
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(ffffffff821fcb20) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821fcb20) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82682fc0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82682fc0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82682fc0,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd806f335e00,774,cc,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd806f335e00,774,cc,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
tcp_output(ffff800000a0b320) at tcp_output+0x15ba sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd806eb54af8,9,fffffd806f335500,0,0,ffff800020ed1ae0) at tcp_usrreq+0xa55
sosend(fffffd806eb54af8,0,ffff800020ed7178,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020ed1ae0,4,ffff800020ed7178,0,ffff800020ed7260) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020ed1ae0,ffff800020ed7210,ffff800020ed7260) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020ed72e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020ed72e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd7a00, 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: 33ca237a OIDs are unsigned. Reflect this when printing them.
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=149b5d16100000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=ecc8887fa10560fe3a24
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+ecc888...@syzkaller.appspotmail.com
panic: pWoAoRNlI_cNGac: hSeP_iL teNOmT_ maLOgWiEcR_EcDh eOcNk :SY SmCbuALfpLl 13c7p u -f17r4e6e8 8l isEXt ImT od0 if9
i
edStopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 41880 10341 0 0x2 0 0 syz-executor.1
437741 67396 0 0x12 0 1 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffd5590, 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 0xfffffd806f335d00+24 0x308c24ff0e6093cf!=0x308c247f65ef6fcf
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffd5590, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff80002319b2c0
rbx 0
rdx 0x8b
rcx 0x2
rax 0x39
r8 0xffffffff81b6be4f kprintf+0x16f
r9 0x1
r10 0x2
r11 0xba22c4dd06e05f9
r12 0
r13 0
r14 0xffff800020ed9608
r15 0
rip 0xffffffff81fe03f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff80002319b240
ss 0x10
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.1) pid=41880 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=17, usrpri=77, nice=20
forw=0xffffffffffffffff, list=0xffff800020e6dd48,0xffff800020ed93a8
process=0xffff800020e80f70 user=0xffff800023196000, vmspace=0xfffffd807f0008a0
estcpu=36, cpticks=3, pctcpu=0.17
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
44564 434762 0 0 3 0x14200 bored sosplice
*10341 41880 82602 0 7 0x2 syz-executor.1
11966 313045 82602 0 2 0x2 syz-executor.0
82602 492944 40266 0 3 0x82 thrsleep syz-fuzzer
82602 208662 40266 0 3 0x4000082 nanosleep syz-fuzzer
82602 54542 40266 0 3 0x4000082 thrsleep syz-fuzzer
82602 388723 40266 0 3 0x4000082 kqread syz-fuzzer
82602 297218 40266 0 3 0x4000082 thrsleep syz-fuzzer
82602 494575 40266 0 3 0x4000082 thrsleep syz-fuzzer
82602 484387 40266 0 3 0x4000082 thrsleep syz-fuzzer
82602 522278 40266 0 3 0x4000082 thrsleep syz-fuzzer
82602 215059 40266 0 3 0x4000082 thrsleep syz-fuzzer
82602 253119 40266 0 3 0x4000082 nanosleep syz-fuzzer
40266 411967 67396 0 3 0x10008a pause ksh
67396 437741 90153 0 7 0x12 sshd
6070 393548 1 0 3 0x100083 ttyin getty
90153 167426 1 0 3 0x80 select sshd
4984 370207 85684 74 3 0x100092 bpf pflogd
85684 218965 1 0 3 0x80 netio pflogd
89222 453710 78054 73 3 0x100090 kqread syslogd
78054 147620 1 0 3 0x100082 netio syslogd
88106 74406 1 77 3 0x100090 poll dhclient
25105 143891 1 0 3 0x80 poll dhclient
97611 247389 0 0 3 0x14200 bored smr
36766 252501 0 0 3 0x14200 pgzero zerothread
11393 516093 0 0 3 0x14200 aiodoned aiodoned
55206 386387 0 0 3 0x14200 syncer update
67634 403772 0 0 3 0x14200 cleaner cleaner
5719 41797 0 0 3 0x14200 reaper reaper
28081 4042 0 0 3 0x14200 pgdaemon pagedaemon
16086 296453 0 0 3 0x14200 bored crynlk
64609 250503 0 0 3 0x14200 bored crypto
81741 520660 0 0 3 0x40014200 acpi0 acpi0
70759 152172 0 0 3 0x40014200 idle1
54880 111543 0 0 2 0x14200 softnet
59455 92862 0 0 3 0x14200 bored systqmp
93669 369869 0 0 3 0x14200 bored systq
17474 442592 0 0 3 0x40014200 bored softclock
46775 131592 0 0 3 0x40014200 idle0
1 58738 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_queue+0x28 sys/kern/kern_bufq.c:182
#4 sdstrategy+0x178 sys/scsi/sd.c:585
#5 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#6 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#7 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#8 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#9 ffs_truncate+0xc76
#10 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1355
#11 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#12 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#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
Process 10341 (syz-executor.1) thread 0xffff800020ed9608 (41880)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82643b30)
#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 getblk+0x14c sys/kern/vfs_bio.c:1019
#7 bread+0x3a bio_doread sys/kern/vfs_bio.c:435 [inline]
#7 bread+0x3a sys/kern/vfs_bio.c:480
#8 ffs_update+0x14a sys/ufs/ffs/ffs_inode.c:91
#9 ffs_truncate+0xc76
#10 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1355
#11 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#12 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#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 (0xfffffd8068be4c50)
#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 (0xfffffd8068be40a0)
#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_queue+0x28 sys/kern/kern_bufq.c:182
#4 sdstrategy+0x178 sys/scsi/sd.c:585
#5 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#6 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#7 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#8 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#9 ffs_truncate+0xc76
#10 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1355
#11 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#12 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#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
Process 67396 (sshd) thread 0xffff800020ed1ae0 (437741)
exclusive rwlock netlock r = 0 (0xffffffff824a2628)
#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 9482 6401K 6798K 78643K 10797 0
pcb 13 8K 8K 78643K 33 0
rtable 102 3K 4K 78643K 248 0
ifaddr 50 11K 12K 78643K 81 0
counters 43 33K 34K 78643K 55 0
ioctlops 0 0K 4K 78643K 1479 0
iov 0 0K 16K 78643K 12 0
mount 1 1K 1K 78643K 1 0
vnodes 1219 77K 77K 78643K 1294 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 3 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 22 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1824 197K 290K 78643K 13058 0
file desc 4 9K 25K 78643K 131 0
sigio 0 0K 0K 78643K 2 0
proc 60 63K 95K 78643K 439 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 14 0
in_multi 39 2K 2K 78643K 50 0
ether_multi 1 0K 0K 78643K 5 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 37 175K 175K 78643K 37 0
exec 0 0K 1K 78643K 218 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 113 22K 22K 78643K 1349 0
UVM aobj 8 2K 2K 78643K 8 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 9 0
NDP 7 0K 0K 78643K 17 0
temp 71 3032K 3096K 78643K 2969 0
kqueue 3 4K 8K 78643K 7 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 2 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 47 0 6 2 0 2 2 0 8 0
unpcb 120 81 0 71 1 0 1 1 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 536 0 536 1 1 0 1 0 8 0
tcpcb 544 40 0 36 1 0 1 1 0 8 0
inpcb 280 125 0 118 2 0 2 2 0 8 1
nd6 48 6 0 0 1 0 1 1 0 8 0
ppxss 1128 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
pfstitem 24 17 0 1 1 0 1 1 0 8 0
pfstkey 112 17 0 1 1 0 1 1 0 8 0
pfstate 328 17 0 1 2 0 2 2 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 200 0 10 13 0 13 13 0 8 0
art_table 32 201 0 10 2 0 2 2 0 8 0
art_node 16 46 0 9 1 0 1 1 0 8 0
semapl 112 20 0 10 1 0 1 1 0 8 0
shmpl 112 6 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1576 0 171 89 0 89 89 0 8 0
ffsino 272 1576 0 171 95 1 94 94 0 8 0
nchpl 144 2008 0 414 60 0 60 60 0 8 0
uvmvnodes 72 1664 0 0 31 0 31 31 0 8 0
vnodes 208 1664 0 0 88 0 88 88 0 8 0
namei 1024 5294 0 5294 1 0 1 1 0 8 1
percpumem 16 38 0 6 1 0 1 1 0 8 0
vmpool 560 2 0 2 1 1 0 1 0 8 0
scxspl 192 5060 0 5060 8 3 5 7 0 8 5
plimitpl 152 23 0 15 1 0 1 1 0 8 0
sigapl 424 347 0 316 4 0 4 4 0 8 0
futexpl 56 1482 0 1482 1 0 1 1 0 8 1
knotepl 112 65 0 46 1 0 1 1 0 8 0
kqueuepl 144 16 0 14 1 0 1 1 0 8 0
pipelkpl 48 81 0 71 1 0 1 1 0 8 0
pipepl 120 162 0 143 1 0 1 1 0 8 0
fdescpl 496 331 0 316 3 0 3 3 0 8 0
filepl 152 1878 0 1778 5 0 5 5 0 8 1
lockfpl 104 32 0 31 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 18 0 7 1 0 1 1 0 8 0
ucredpl 96 175 0 166 1 0 1 1 0 8 0
zombiepl 144 316 0 316 1 0 1 1 0 8 1
processpl 984 347 0 316 5 0 5 5 0 8 0
procpl 624 582 0 542 4 0 4 4 0 8 0
sosppl 128 2 0 2 1 0 1 1 0 8 1
sockpl 400 233 0 214 4 0 4 4 0 8 2
mcl64k 65536 1 0 0 1 0 1 1 0 8 0
mcl12k 12288 2 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 3 0 0 1 0 1 1 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 209 0 0 26 0 26 26 0 8 0
mtagpl 80 23 0 0 1 0 1 1 0 8 0
mbufpl 256 252 0 0 15 0 15 15 0 8 0
bufpl 280 3422 0 133 235 0 235 235 0 8 0
anonpl 16 44362 0 29405 62 1 61 61 0 124 0
amapchunkpl 152 1606 0 1458 8 1 7 8 0 158 0
amappl16 192 1296 0 506 40 0 40 40 0 8 0
amappl15 184 9 0 8 2 1 1 1 0 8 0
amappl14 176 72 0 67 1 0 1 1 0 8 0
amappl13 168 29 0 26 1 0 1 1 0 8 0
amappl12 160 52 0 49 2 1 1 1 0 8 0
amappl11 152 59 0 43 1 0 1 1 0 8 0
amappl10 144 20 0 14 1 0 1 1 0 8 0
amappl9 136 437 0 434 1 0 1 1 0 8 0
amappl8 128 413 0 380 2 0 2 2 0 8 0
amappl7 120 117 0 105 1 0 1 1 0 8 0
amappl6 112 32 0 25 2 1 1 1 0 8 0
amappl5 104 185 0 169 1 0 1 1 0 8 0
amappl4 96 532 0 506 1 0 1 1 0 8 0
amappl3 88 151 0 145 1 0 1 1 0 8 0
amappl2 80 1701 0 1639 2 0 2 2 0 8 0
amappl1 72 17165 0 16737 23 13 10 18 0 8 0
amappl 80 836 0 792 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 7 0 0 1 0 1 1 0 8 0
uaddrrnd 24 333 0 318 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 333 0 318 1 0 1 1 0 8 0
vmmpekpl 168 6541 0 6510 2 0 2 2 0 8 0
vmmpepl 168 47116 0 45277 117 11 106 109 0 357 19
vmsppl 368 332 0 318 2 0 2 2 0 8 0
pdppl 4096 674 0 636 6 0 6 6 0 8 0
pvpl 32 155534 0 137533 149 0 149 149 0 265 2
pmappl 232 332 0 318 2 1 1 2 0 8 0
extentpl 40 53 0 36 1 0 1 1 0 8 0
phpool 112 267 0 4 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: 0x7f7ffffd5590, 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(3f8,0,64) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,64) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,64) at comcnputc+0x131 sys/dev/ic/com.c:1254
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(ffffffff821fcb20) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821fcb20) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82682fc0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82682fc0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82682fc0,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd806f335e00,774,cc,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd806f335e00,774,cc,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
tcp_output(ffff800000a0b320) at tcp_output+0x15ba sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd806eb54af8,9,fffffd806f335500,0,0,ffff800020ed1ae0) at tcp_usrreq+0xa55
end trace frame: 0xffff800020ed70b0, 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(3f8,0,64) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,64) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,64) at comcnputc+0x131 sys/dev/ic/com.c:1254
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(ffffffff821fcb20) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821fcb20) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82682fc0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82682fc0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82682fc0,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd806f335e00,774,cc,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd806f335e00,774,cc,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
tcp_output(ffff800000a0b320) at tcp_output+0x15ba sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd806eb54af8,9,fffffd806f335500,0,0,ffff800020ed1ae0) at tcp_usrreq+0xa55
sosend(fffffd806eb54af8,0,ffff800020ed7178,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020ed1ae0,4,ffff800020ed7178,0,ffff800020ed7260) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020ed1ae0,ffff800020ed7210,ffff800020ed7260) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020ed72e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020ed72e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd7a00, count: -19
---
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Anton Lindqvist
Jun 1, 2020, 2:46:07 AM6/1/20
to syzbot, syzkaller-o...@googlegroups.com
#syz dup: pool: cpu free list modified: mbufpl
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