panic: pWoAoRl_NIcNaGc:h e_SiPLt emNO_Tm LagOWiEcR_EcDhe OcNk :S YmSbuCAfpLLl c13p7u -fr21e5e 72l8i sEtX ImTo d0i f9ie
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syzbot
Apr 29, 2020, 8:58:14 PM4/29/20
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following crash on:
HEAD commit: 577c7898 Enable the trickle charger after setting the cont..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=127111dfe00000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=5ec72f9ba69b9444c8f3
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+5ec72f...@syzkaller.appspotmail.com
panic: pWoAoRl_NIcNaGc:h e_SiPLt emNO_Tm LagOWiEcR_EcDhe OcNk :S YmSbuCAfpLLl c13p7u -fr21e5e 72l8i sEtX ImTo d0i f9ie
d:Stopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*387743 4556 0 0x2 0 0 syz-executor.0
76709 65757 0 0x12 0 1 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffcb540, 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 0xfffffd80682b8d00+16 0x0!=0x16688551cc7d6435
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffcb540, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800020f6dfc0
rbx 0
rdx 0xffff800020e6d868
rcx 0
rax 0x39
r8 0xffffffff81f8ff4f kprintf+0x16f
r9 0x1
r10 0x25
r11 0xf7780d994cb66b73
r12 0
r13 0
r14 0xffff800020e6d868
r15 0
rip 0xffffffff8218f3f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800020f6df40
ss 0x10
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.0) pid=387743 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=17, usrpri=77, nice=20
forw=0xffffffffffffffff, list=0xffff800020e6cea8,0xffff800020e6d128
process=0xffff800020e81348 user=0xffff800020f68000, vmspace=0xfffffd807efff8a0
estcpu=36, cpticks=1, pctcpu=0.19
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
1203 223481 0 0 3 0x14200 acct acct
13719 430068 0 0 3 0x14200 bored sosplice
45305 387187 1 0 3 0x100083 ttyin getty
81423 414050 11432 0 2 0x2 syz-executor.1
* 4556 387743 11432 0 7 0x2 syz-executor.0
11432 235189 85861 0 3 0x82 thrsleep syz-fuzzer
11432 359371 85861 0 3 0x4000082 nanosleep syz-fuzzer
11432 655 85861 0 3 0x4000082 thrsleep syz-fuzzer
11432 474266 85861 0 3 0x4000082 thrsleep syz-fuzzer
11432 47552 85861 0 3 0x4000082 thrsleep syz-fuzzer
11432 12115 85861 0 3 0x4000082 thrsleep syz-fuzzer
11432 377271 85861 0 3 0x4000082 thrsleep syz-fuzzer
11432 49547 85861 0 3 0x4000082 thrsleep syz-fuzzer
11432 476512 85861 0 3 0x4000082 nanosleep syz-fuzzer
11432 98657 85861 0 3 0x4000082 kqread syz-fuzzer
85861 307983 65757 0 3 0x10008a pause ksh
65757 76709 84558 0 7 0x12 sshd
84558 3198 1 0 3 0x80 select sshd
74561 99730 39501 74 3 0x100092 bpf pflogd
39501 434268 1 0 3 0x80 netio pflogd
53671 392272 84175 73 3 0x100090 kqread syslogd
84175 128695 1 0 3 0x100082 netio syslogd
17083 122197 1 77 3 0x100090 poll dhclient
13775 388912 1 0 3 0x80 poll dhclient
8341 1370 0 0 3 0x14200 bored smr
55000 419874 0 0 3 0x14200 pgzero zerothread
53309 92343 0 0 3 0x14200 aiodoned aiodoned
72538 457095 0 0 3 0x14200 syncer update
7690 437354 0 0 3 0x14200 cleaner cleaner
575 205647 0 0 3 0x14200 reaper reaper
30932 229483 0 0 3 0x14200 pgdaemon pagedaemon
37631 216116 0 0 3 0x14200 bored crynlk
75882 485047 0 0 3 0x14200 bored crypto
6421 322906 0 0 3 0x40014200 acpi0 acpi0
33085 166800 0 0 3 0x40014200 idle1
68401 338065 0 0 2 0x14200 softnet
88876 462549 0 0 3 0x14200 bored systqmp
2855 116909 0 0 3 0x14200 bored systq
94109 292729 0 0 3 0x40014200 bored softclock
97224 339382 0 0 3 0x40014200 idle0
1 467140 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &iopl->mtx r = 0 (0xffff800000038170)
#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 scsi_xsh_runqueue+0x37 scsi_pending_start sys/scsi/scsi_base.c:214 [inline]
#3 scsi_xsh_runqueue+0x37 sys/scsi/scsi_base.c:576
#4 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#5 sdstrategy+0x187 sys/scsi/sd.c:585
#6 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#7 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#8 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#9 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#10 ffs_truncate+0xc76
#11 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1355
#12 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#13 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#14 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#14 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#15 Xsyscall+0x128
Process 4556 (syz-executor.0) thread 0xffff800020e6d868 (387743)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8266f830)
#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 (0xfffffd806e33ac48)
#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 (0xfffffd806b59b6f8)
#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 &iopl->mtx r = 0 (0xffff800000038170)
#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 scsi_xsh_runqueue+0x37 scsi_pending_start sys/scsi/scsi_base.c:214 [inline]
#3 scsi_xsh_runqueue+0x37 sys/scsi/scsi_base.c:576
#4 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#5 sdstrategy+0x187 sys/scsi/sd.c:585
#6 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#7 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#8 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#9 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#10 ffs_truncate+0xc76
#11 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1355
#12 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#13 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#14 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#14 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#15 Xsyscall+0x128
Process 65757 (sshd) thread 0xffff800020ed1d50 (76709)
exclusive rwlock netlock r = 0 (0xffffffff8252ae18)
#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 9495 6407K 6788K 78643K 10863 0
pcb 13 8K 9K 78643K 310 0
rtable 94 3K 4K 78643K 269 0
ifaddr 61 13K 14K 78643K 110 0
counters 43 33K 34K 78643K 59 0
ioctlops 0 0K 4K 78643K 1479 0
iov 0 0K 18K 78643K 41 0
mount 1 1K 1K 78643K 1 0
vnodes 1219 77K 77K 78643K 1322 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 5 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 52 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1809 196K 290K 78643K 12766 0
file desc 4 9K 25K 78643K 262 0
sigio 0 0K 0K 78643K 6 0
proc 60 63K 95K 78643K 488 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 26 0
in_multi 45 2K 2K 78643K 85 0
ether_multi 1 0K 0K 78643K 11 0
mrt 0 0K 0K 78643K 8 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 230 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 134 23K 24K 78643K 1790 0
UVM aobj 10 2K 2K 78643K 10 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 68 0
NDP 9 0K 0K 78643K 21 0
temp 85 3037K 3102K 78643K 8341 0
kqueue 3 4K 8K 78643K 12 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 49 0 12 2 0 2 2 0 8 0
unpcb 120 229 0 219 1 0 1 1 0 8 0
syncache 264 6 0 6 2 1 1 1 0 8 1
tcpqe 32 165 0 165 1 1 0 1 0 8 0
tcpcb 544 120 0 116 1 0 1 1 0 8 0
inpcb 280 565 0 558 2 0 2 2 0 8 1
rttmr 72 4 0 4 1 1 0 1 0 8 0
nd6 48 6 0 3 1 0 1 1 0 8 0
ppxss 1128 1 0 1 1 1 0 1 0 8 0
pffrag 232 8 0 8 1 0 1 1 0 482 1
pffrnode 88 8 0 8 1 0 1 1 0 8 1
pffrent 40 61 0 61 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 48 0 3 1 0 1 1 0 8 0
pfstkey 112 48 0 3 2 0 2 2 0 8 0
pfstate 328 48 0 3 4 0 4 4 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 256 189 0 40 12 0 12 12 0 8 0
art_table 32 190 0 40 2 0 2 2 0 8 0
art_node 16 48 0 14 1 0 1 1 0 8 0
sysvmsgpl 40 9 0 9 2 1 1 1 0 8 1
semapl 112 48 0 38 1 0 1 1 0 8 0
shmpl 112 8 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1760 0 355 89 0 89 89 0 8 0
ffsino 272 1760 0 355 95 0 95 95 0 8 0
nchpl 144 2390 0 786 60 0 60 60 0 8 0
uvmvnodes 72 1867 0 0 34 0 34 34 0 8 0
vnodes 208 1867 0 0 99 0 99 99 0 8 0
namei 1024 6500 0 6500 1 0 1 1 0 8 1
percpumem 16 40 0 8 1 0 1 1 0 8 0
scxspl 192 6342 0 6342 8 5 3 7 0 8 3
plimitpl 152 39 0 31 1 0 1 1 0 8 0
sigapl 424 480 0 448 4 0 4 4 0 8 0
futexpl 56 4398 0 4398 1 0 1 1 0 8 1
knotepl 112 68 0 49 1 0 1 1 0 8 0
kqueuepl 144 24 0 22 1 0 1 1 0 8 0
pipelkpl 48 123 0 113 1 0 1 1 0 8 0
pipepl 120 246 0 227 2 1 1 2 0 8 0
fdescpl 496 463 0 448 3 0 3 3 0 8 0
filepl 152 2974 0 2874 6 0 6 6 0 8 1
lockfpl 104 92 0 91 1 0 1 1 0 8 0
lockfspl 48 27 0 26 1 0 1 1 0 8 0
sessionpl 112 19 0 8 1 0 1 1 0 8 0
pgrppl 48 21 0 10 1 0 1 1 0 8 0
ucredpl 96 224 0 214 1 0 1 1 0 8 0
zombiepl 144 448 0 448 1 0 1 1 0 8 1
processpl 984 480 0 448 5 0 5 5 0 8 0
procpl 624 990 0 949 4 0 4 4 0 8 0
sosppl 128 2 0 2 1 1 0 1 0 8 0
sockpl 400 824 0 805 6 1 5 5 0 8 3
mcl64k 65536 16 0 0 2 0 2 2 0 8 0
mcl16k 16384 2 0 0 1 0 1 1 0 8 0
mcl12k 12288 4 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 5 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 173 0 0 21 0 21 21 0 8 0
mtagpl 80 20 0 0 1 0 1 1 0 8 0
mbufpl 256 228 0 0 13 0 13 13 0 8 0
bufpl 280 3775 0 150 259 0 259 259 0 8 0
anonpl 16 54982 0 39926 64 2 62 63 0 124 0
amapchunkpl 152 2227 0 2098 8 1 7 8 0 158 0
amappl16 192 1781 0 969 43 1 42 43 0 8 1
amappl15 184 1 0 0 1 0 1 1 0 8 0
amappl14 176 253 0 248 1 0 1 1 0 8 0
amappl13 168 255 0 252 1 0 1 1 0 8 0
amappl12 160 3 0 2 1 0 1 1 0 8 0
amappl11 152 52 0 37 1 0 1 1 0 8 0
amappl10 144 22 0 15 1 0 1 1 0 8 0
amappl9 136 556 0 553 1 0 1 1 0 8 0
amappl8 128 343 0 312 2 0 2 2 0 8 0
amappl7 120 120 0 107 1 0 1 1 0 8 0
amappl6 112 35 0 26 1 0 1 1 0 8 0
amappl5 104 360 0 345 1 0 1 1 0 8 0
amappl4 96 488 0 459 1 0 1 1 0 8 0
amappl3 88 123 0 116 1 0 1 1 0 8 0
amappl2 80 3008 0 2937 2 0 2 2 0 8 0
amappl1 72 23488 0 22989 23 12 11 18 0 8 0
amappl 80 1241 0 1200 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 9 0 0 1 0 1 1 0 8 0
uaddrrnd 24 463 0 448 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 463 0 448 1 0 1 1 0 8 0
vmmpekpl 168 17071 0 17044 2 0 2 2 0 8 0
vmmpepl 168 77992 0 75999 116 12 104 110 0 357 4
vmsppl 368 462 0 448 2 0 2 2 0 8 0
pdppl 4096 934 0 896 6 0 6 6 0 8 0
pvpl 32 234510 0 215878 163 2 161 163 0 265 5
pmappl 232 462 0 448 2 1 1 2 0 8 0
extentpl 40 46 0 29 1 0 1 1 0 8 0
phpool 112 263 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: 0x7f7ffffcb540, 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(3f8,0,3a) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,3a) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,3a) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(3a) at cnputc+0x4c sys/dev/cons.c:239
kputchar(3a,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff821f6206) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821f6206) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82677bf0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82677bf0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82677bf0,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd807cab5100,7dc,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd807cab5100,7dc,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
tcp_output(ffff800000a0acc0) at tcp_output+0x15ba sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd806eb437d8,9,fffffd807cb36800,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55
end trace frame: 0xffff800020e8db80, 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(3f8,0,3a) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,3a) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,3a) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(3a) at cnputc+0x4c sys/dev/cons.c:239
kputchar(3a,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff821f6206) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821f6206) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82677bf0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82677bf0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82677bf0,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd807cab5100,7dc,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd807cab5100,7dc,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
tcp_output(ffff800000a0acc0) at tcp_output+0x15ba sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd806eb437d8,9,fffffd807cb36800,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55
sosend(fffffd806eb437d8,0,ffff800020e8dc48,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020ed1d50,4,ffff800020e8dc48,0,ffff800020e8dd30) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020ed1d50,ffff800020e8dce0,ffff800020e8dd30) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e8ddb0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e8ddb0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd3120, 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: 577c7898 Enable the trickle charger after setting the cont..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=127111dfe00000
kernel config: https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link: https://syzkaller.appspot.com/bug?extid=5ec72f9ba69b9444c8f3
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+5ec72f...@syzkaller.appspotmail.com
panic: pWoAoRl_NIcNaGc:h e_SiPLt emNO_Tm LagOWiEcR_EcDhe OcNk :S YmSbuCAfpLLl c13p7u -fr21e5e 72l8i sEtX ImTo d0i f9ie
d:Stopped at savectx+0xb1: movl $0,%gs:0x530
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*387743 4556 0 0x2 0 0 syz-executor.0
76709 65757 0 0x12 0 1 sshd
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffcb540, 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 0xfffffd80682b8d00+16 0x0!=0x16688551cc7d6435
ddb{0}> trace
savectx() at savectx+0xb1
end of kernel
end trace frame: 0x7f7ffffcb540, count: -1
ddb{0}> show registers
rdi 0
rsi 0
rbp 0xffff800020f6dfc0
rbx 0
rdx 0xffff800020e6d868
rcx 0
rax 0x39
r8 0xffffffff81f8ff4f kprintf+0x16f
r9 0x1
r10 0x25
r11 0xf7780d994cb66b73
r12 0
r13 0
r14 0xffff800020e6d868
r15 0
rip 0xffffffff8218f3f1 savectx+0xb1
cs 0x8
rflags 0x46
rsp 0xffff800020f6df40
ss 0x10
savectx+0xb1: movl $0,%gs:0x530
ddb{0}> show proc
PROC (syz-executor.0) pid=387743 stat=onproc
flags process=2<EXEC,8ORPHAN> proc=0
pri=17, usrpri=77, nice=20
forw=0xffffffffffffffff, list=0xffff800020e6cea8,0xffff800020e6d128
process=0xffff800020e81348 user=0xffff800020f68000, vmspace=0xfffffd807efff8a0
estcpu=36, cpticks=1, pctcpu=0.19
user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
1203 223481 0 0 3 0x14200 acct acct
13719 430068 0 0 3 0x14200 bored sosplice
45305 387187 1 0 3 0x100083 ttyin getty
81423 414050 11432 0 2 0x2 syz-executor.1
* 4556 387743 11432 0 7 0x2 syz-executor.0
11432 235189 85861 0 3 0x82 thrsleep syz-fuzzer
11432 359371 85861 0 3 0x4000082 nanosleep syz-fuzzer
11432 655 85861 0 3 0x4000082 thrsleep syz-fuzzer
11432 474266 85861 0 3 0x4000082 thrsleep syz-fuzzer
11432 47552 85861 0 3 0x4000082 thrsleep syz-fuzzer
11432 12115 85861 0 3 0x4000082 thrsleep syz-fuzzer
11432 377271 85861 0 3 0x4000082 thrsleep syz-fuzzer
11432 49547 85861 0 3 0x4000082 thrsleep syz-fuzzer
11432 476512 85861 0 3 0x4000082 nanosleep syz-fuzzer
11432 98657 85861 0 3 0x4000082 kqread syz-fuzzer
85861 307983 65757 0 3 0x10008a pause ksh
65757 76709 84558 0 7 0x12 sshd
84558 3198 1 0 3 0x80 select sshd
74561 99730 39501 74 3 0x100092 bpf pflogd
39501 434268 1 0 3 0x80 netio pflogd
53671 392272 84175 73 3 0x100090 kqread syslogd
84175 128695 1 0 3 0x100082 netio syslogd
17083 122197 1 77 3 0x100090 poll dhclient
13775 388912 1 0 3 0x80 poll dhclient
8341 1370 0 0 3 0x14200 bored smr
55000 419874 0 0 3 0x14200 pgzero zerothread
53309 92343 0 0 3 0x14200 aiodoned aiodoned
72538 457095 0 0 3 0x14200 syncer update
7690 437354 0 0 3 0x14200 cleaner cleaner
575 205647 0 0 3 0x14200 reaper reaper
30932 229483 0 0 3 0x14200 pgdaemon pagedaemon
37631 216116 0 0 3 0x14200 bored crynlk
75882 485047 0 0 3 0x14200 bored crypto
6421 322906 0 0 3 0x40014200 acpi0 acpi0
33085 166800 0 0 3 0x40014200 idle1
68401 338065 0 0 2 0x14200 softnet
88876 462549 0 0 3 0x14200 bored systqmp
2855 116909 0 0 3 0x14200 bored systq
94109 292729 0 0 3 0x40014200 bored softclock
97224 339382 0 0 3 0x40014200 idle0
1 467140 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex &iopl->mtx r = 0 (0xffff800000038170)
#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 scsi_xsh_runqueue+0x37 scsi_pending_start sys/scsi/scsi_base.c:214 [inline]
#3 scsi_xsh_runqueue+0x37 sys/scsi/scsi_base.c:576
#4 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#5 sdstrategy+0x187 sys/scsi/sd.c:585
#6 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#7 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#8 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#9 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#10 ffs_truncate+0xc76
#11 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1355
#12 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#13 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#14 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#14 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#15 Xsyscall+0x128
Process 4556 (syz-executor.0) thread 0xffff800020e6d868 (387743)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8266f830)
#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 (0xfffffd806e33ac48)
#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 (0xfffffd806b59b6f8)
#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 &iopl->mtx r = 0 (0xffff800000038170)
#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 scsi_xsh_runqueue+0x37 scsi_pending_start sys/scsi/scsi_base.c:214 [inline]
#3 scsi_xsh_runqueue+0x37 sys/scsi/scsi_base.c:576
#4 scsi_xsh_add+0xc9 sys/scsi/scsi_base.c:535
#5 sdstrategy+0x187 sys/scsi/sd.c:585
#6 spec_strategy+0x74 sys/kern/spec_vnops.c:468
#7 VOP_STRATEGY+0x99 sys/kern/vfs_vops.c:712
#8 bwrite+0x1b9 sys/kern/vfs_bio.c:756
#9 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113
#10 ffs_truncate+0xc76
#11 ufs_rmdir+0x3af sys/ufs/ufs/ufs_vnops.c:1355
#12 VOP_RMDIR+0xf8 sys/kern/vfs_vops.c:474
#13 dounlinkat+0x14c sys/kern/vfs_syscalls.c:1886
#14 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
#14 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
#15 Xsyscall+0x128
Process 65757 (sshd) thread 0xffff800020ed1d50 (76709)
exclusive rwlock netlock r = 0 (0xffffffff8252ae18)
#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 9495 6407K 6788K 78643K 10863 0
pcb 13 8K 9K 78643K 310 0
rtable 94 3K 4K 78643K 269 0
ifaddr 61 13K 14K 78643K 110 0
counters 43 33K 34K 78643K 59 0
ioctlops 0 0K 4K 78643K 1479 0
iov 0 0K 18K 78643K 41 0
mount 1 1K 1K 78643K 1 0
vnodes 1219 77K 77K 78643K 1322 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 5K 78643K 5 0
VM map 2 1K 1K 78643K 2 0
sem 12 0K 0K 78643K 52 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1809 196K 290K 78643K 12766 0
file desc 4 9K 25K 78643K 262 0
sigio 0 0K 0K 78643K 6 0
proc 60 63K 95K 78643K 488 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 26 0
in_multi 45 2K 2K 78643K 85 0
ether_multi 1 0K 0K 78643K 11 0
mrt 0 0K 0K 78643K 8 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 230 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 134 23K 24K 78643K 1790 0
UVM aobj 10 2K 2K 78643K 10 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
ip6_options 0 0K 0K 78643K 68 0
NDP 9 0K 0K 78643K 21 0
temp 85 3037K 3102K 78643K 8341 0
kqueue 3 4K 8K 78643K 12 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 49 0 12 2 0 2 2 0 8 0
unpcb 120 229 0 219 1 0 1 1 0 8 0
syncache 264 6 0 6 2 1 1 1 0 8 1
tcpqe 32 165 0 165 1 1 0 1 0 8 0
tcpcb 544 120 0 116 1 0 1 1 0 8 0
inpcb 280 565 0 558 2 0 2 2 0 8 1
rttmr 72 4 0 4 1 1 0 1 0 8 0
nd6 48 6 0 3 1 0 1 1 0 8 0
ppxss 1128 1 0 1 1 1 0 1 0 8 0
pffrag 232 8 0 8 1 0 1 1 0 482 1
pffrnode 88 8 0 8 1 0 1 1 0 8 1
pffrent 40 61 0 61 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 48 0 3 1 0 1 1 0 8 0
pfstkey 112 48 0 3 2 0 2 2 0 8 0
pfstate 328 48 0 3 4 0 4 4 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 256 189 0 40 12 0 12 12 0 8 0
art_table 32 190 0 40 2 0 2 2 0 8 0
art_node 16 48 0 14 1 0 1 1 0 8 0
sysvmsgpl 40 9 0 9 2 1 1 1 0 8 1
semapl 112 48 0 38 1 0 1 1 0 8 0
shmpl 112 8 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1760 0 355 89 0 89 89 0 8 0
ffsino 272 1760 0 355 95 0 95 95 0 8 0
nchpl 144 2390 0 786 60 0 60 60 0 8 0
uvmvnodes 72 1867 0 0 34 0 34 34 0 8 0
vnodes 208 1867 0 0 99 0 99 99 0 8 0
namei 1024 6500 0 6500 1 0 1 1 0 8 1
percpumem 16 40 0 8 1 0 1 1 0 8 0
scxspl 192 6342 0 6342 8 5 3 7 0 8 3
plimitpl 152 39 0 31 1 0 1 1 0 8 0
sigapl 424 480 0 448 4 0 4 4 0 8 0
futexpl 56 4398 0 4398 1 0 1 1 0 8 1
knotepl 112 68 0 49 1 0 1 1 0 8 0
kqueuepl 144 24 0 22 1 0 1 1 0 8 0
pipelkpl 48 123 0 113 1 0 1 1 0 8 0
pipepl 120 246 0 227 2 1 1 2 0 8 0
fdescpl 496 463 0 448 3 0 3 3 0 8 0
filepl 152 2974 0 2874 6 0 6 6 0 8 1
lockfpl 104 92 0 91 1 0 1 1 0 8 0
lockfspl 48 27 0 26 1 0 1 1 0 8 0
sessionpl 112 19 0 8 1 0 1 1 0 8 0
pgrppl 48 21 0 10 1 0 1 1 0 8 0
ucredpl 96 224 0 214 1 0 1 1 0 8 0
zombiepl 144 448 0 448 1 0 1 1 0 8 1
processpl 984 480 0 448 5 0 5 5 0 8 0
procpl 624 990 0 949 4 0 4 4 0 8 0
sosppl 128 2 0 2 1 1 0 1 0 8 0
sockpl 400 824 0 805 6 1 5 5 0 8 3
mcl64k 65536 16 0 0 2 0 2 2 0 8 0
mcl16k 16384 2 0 0 1 0 1 1 0 8 0
mcl12k 12288 4 0 0 1 0 1 1 0 8 0
mcl9k 9216 1 0 0 1 0 1 1 0 8 0
mcl8k 8192 5 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 173 0 0 21 0 21 21 0 8 0
mtagpl 80 20 0 0 1 0 1 1 0 8 0
mbufpl 256 228 0 0 13 0 13 13 0 8 0
bufpl 280 3775 0 150 259 0 259 259 0 8 0
anonpl 16 54982 0 39926 64 2 62 63 0 124 0
amapchunkpl 152 2227 0 2098 8 1 7 8 0 158 0
amappl16 192 1781 0 969 43 1 42 43 0 8 1
amappl15 184 1 0 0 1 0 1 1 0 8 0
amappl14 176 253 0 248 1 0 1 1 0 8 0
amappl13 168 255 0 252 1 0 1 1 0 8 0
amappl12 160 3 0 2 1 0 1 1 0 8 0
amappl11 152 52 0 37 1 0 1 1 0 8 0
amappl10 144 22 0 15 1 0 1 1 0 8 0
amappl9 136 556 0 553 1 0 1 1 0 8 0
amappl8 128 343 0 312 2 0 2 2 0 8 0
amappl7 120 120 0 107 1 0 1 1 0 8 0
amappl6 112 35 0 26 1 0 1 1 0 8 0
amappl5 104 360 0 345 1 0 1 1 0 8 0
amappl4 96 488 0 459 1 0 1 1 0 8 0
amappl3 88 123 0 116 1 0 1 1 0 8 0
amappl2 80 3008 0 2937 2 0 2 2 0 8 0
amappl1 72 23488 0 22989 23 12 11 18 0 8 0
amappl 80 1241 0 1200 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 9 0 0 1 0 1 1 0 8 0
uaddrrnd 24 463 0 448 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 463 0 448 1 0 1 1 0 8 0
vmmpekpl 168 17071 0 17044 2 0 2 2 0 8 0
vmmpepl 168 77992 0 75999 116 12 104 110 0 357 4
vmsppl 368 462 0 448 2 0 2 2 0 8 0
pdppl 4096 934 0 896 6 0 6 6 0 8 0
pvpl 32 234510 0 215878 163 2 161 163 0 265 5
pmappl 232 462 0 448 2 1 1 2 0 8 0
extentpl 40 46 0 29 1 0 1 1 0 8 0
phpool 112 263 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: 0x7f7ffffcb540, 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(3f8,0,3a) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,3a) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,3a) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(3a) at cnputc+0x4c sys/dev/cons.c:239
kputchar(3a,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff821f6206) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821f6206) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82677bf0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82677bf0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82677bf0,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd807cab5100,7dc,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd807cab5100,7dc,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
tcp_output(ffff800000a0acc0) at tcp_output+0x15ba sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd806eb437d8,9,fffffd807cb36800,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55
end trace frame: 0xffff800020e8db80, 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(3f8,0,3a) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759
comcnputc(800,3a) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,3a) at comcnputc+0x131 sys/dev/ic/com.c:1254
cnputc(3a) at cnputc+0x4c sys/dev/cons.c:239
kputchar(3a,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343
kprintf() at kprintf+0x15c sys/kern/subr_prf.c:700
panic(ffffffff821f6206) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline]
panic(ffffffff821f6206) at panic+0xf3 sys/kern/subr_prf.c:197
pool_cache_get(ffffffff82677bf0) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline]
pool_cache_get(ffffffff82677bf0) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884
pool_get(ffffffff82677bf0,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_copym(fffffd807cab5100,7dc,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline]
m_copym(fffffd807cab5100,7dc,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667
tcp_output(ffff800000a0acc0) at tcp_output+0x15ba sys/netinet/tcp_output.c:673
tcp_usrreq(fffffd806eb437d8,9,fffffd807cb36800,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55
sosend(fffffd806eb437d8,0,ffff800020e8dc48,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549
dofilewritev(ffff800020ed1d50,4,ffff800020e8dc48,0,ffff800020e8dd30) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365
sys_write(ffff800020ed1d50,ffff800020e8dce0,ffff800020e8dd30) at sys_write+0x83 sys/kern/sys_generic.c:285
syscall(ffff800020e8ddb0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020e8ddb0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7f7ffffd3120, count: -19
---
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Anton Lindqvist
Apr 30, 2020, 1:58:41 AM4/30/20
to syzbot, syzkaller-o...@googlegroups.com
#syz dup: pool: cpu free list modified: mbufpl
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