Hello,
syzbot found the following issue on:
HEAD commit: b0cb8ce4 Asus USB-N10 should work with urtwn(4). Patch by ..
git tree: openbsd
console output:
https://syzkaller.appspot.com/x/log.txt?x=10612ccdd00000
kernel config:
https://syzkaller.appspot.com/x/.config?x=bf87b6915a88cd0d
dashboard link:
https://syzkaller.appspot.com/bug?extid=eb593ee96235d71ade89
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by:
syzbot+eb593e...@syzkaller.appspotmail.com
login: panic: acquiring blockable sleep lock with spinlock or critical section held (rwlock) solock
Stopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff823e90cf) at panic+0x15e sys/kern/subr_prf.c:218
witness_checkorder(fffffd806daa87a8,9,0) at witness_checkorder+0x1188 sys/kern/subr_witness.c:833
rw_enter_write(fffffd806daa8798) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128
solock(fffffd806daa8790) at solock+0x97 sys/kern/uipc_socket2.c:299
rtm_senddesync_timer(fffffd806daa8790) at rtm_senddesync_timer+0x1a sys/net/rtsock.c:454
timeout_run(fffffd8074008810) at timeout_run+0xcc sys/kern/kern_timeout.c:674
softclock_process_tick_timeout(fffffd8074008810,0) at softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721
softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:752
softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206
sched_idle(ffffffff8272eff0) at sched_idle+0x417 sys/kern/kern_sched.c:178
end trace frame: 0x0, count: 2
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
acquiring blockable sleep lock with spinlock or critical section held (rwlock) solock
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff823e90cf) at panic+0x15e sys/kern/subr_prf.c:218
witness_checkorder(fffffd806daa87a8,9,0) at witness_checkorder+0x1188 sys/kern/subr_witness.c:833
rw_enter_write(fffffd806daa8798) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128
solock(fffffd806daa8790) at solock+0x97 sys/kern/uipc_socket2.c:299
rtm_senddesync_timer(fffffd806daa8790) at rtm_senddesync_timer+0x1a sys/net/rtsock.c:454
timeout_run(fffffd8074008810) at timeout_run+0xcc sys/kern/kern_timeout.c:674
softclock_process_tick_timeout(fffffd8074008810,0) at softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721
softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:752
softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206
sched_idle(ffffffff8272eff0) at sched_idle+0x417 sys/kern/kern_sched.c:178
end trace frame: 0x0, count: -13
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002116f480
rbx 0xffff80002116f490
rdx 0x8b
rcx 0x2
rax 0x1
r8 0xffffffff814588c5 kprintf+0x145
r9 0x1
r10 0x8419c6e0a8aafbb3
r11 0x89c57f072069aa71
r12 0x3000000008
r13 0xffff80002116f530
r14 0x100
r15 0x1
rip 0xffffffff814ec468 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff80002116f470
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{0}> show proc
PROC (idle0) pid=234235 stat=onproc
flags process=14000<NOZOMBIE,SYSTEM> proc=40000200<SYSTEM,CPUPEG>
pri=0, usrpri=50, nice=20
forw=0x1034cbab1ede83b8, list=0xffff800021169a40,0xffff800021169510
process=0xffff8000ffffee68 user=0xffff80002116a000, vmspace=0xffffffff827d9248
estcpu=0, cpticks=8669, pctcpu=0.0
user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
19747 171517 16883 32767 3 0x90 nanoslp syz-executor.0
19747 72118 16883 32767 3 0x4000090 kqread syz-executor.0
19747 930 16883 32767 3 0x4000090 fsleep syz-executor.0
4559 193882 82059 32767 3 0x90 piperd syz-executor.1
82059 382130 4948 0 3 0x82 wait syz-executor.1
16883 178379 16228 32767 3 0x90 nanoslp syz-executor.0
16228 83102 4948 0 3 0x82 wait syz-executor.0
4948 252150 17354 0 3 0x82 thrsleep syz-fuzzer
4948 337314 17354 0 3 0x4000082 nanoslp syz-fuzzer
4948 374769 17354 0 3 0x4000082 thrsleep syz-fuzzer
4948 193757 17354 0 3 0x4000082 thrsleep syz-fuzzer
4948 43742 17354 0 3 0x4000082 thrsleep syz-fuzzer
4948 52284 17354 0 3 0x4000082 thrsleep syz-fuzzer
4948 187559 17354 0 3 0x4000082 thrsleep syz-fuzzer
4948 109669 17354 0 3 0x4000082 kqread syz-fuzzer
17354 56894 85903 0 3 0x10008a sigsusp ksh
85903 328915 55217 0 3 0x92 select sshd
65836 492423 1 0 3 0x100083 ttyin getty
55217 214370 1 0 3 0x80 select sshd
34988 10400 49756 73 3 0x100090 kqread syslogd
49756 302578 1 0 3 0x100082 netio syslogd
97371 443969 1 77 3 0x100090 poll dhclient
45596 82065 1 0 3 0x80 poll dhclient
2245 218126 0 0 3 0x14200 bored smr
63462 160351 0 0 3 0x14200 pgzero zerothread
30953 52838 0 0 3 0x14200 aiodoned aiodoned
95778 222888 0 0 3 0x14200 syncer update
95834 272931 0 0 3 0x14200 cleaner cleaner
83938 24065 0 0 3 0x14200 reaper reaper
37085 156735 0 0 3 0x14200 pgdaemon pagedaemon
55142 345126 0 0 3 0x14200 bored crynlk
22449 447604 0 0 3 0x14200 bored crypto
95652 95380 0 0 3 0x14200 bored viomb
95365 315544 0 0 3 0x40014200 acpi0 acpi0
46855 55128 0 0 7 0x40014200 idle1
41785 24642 0 0 3 0x14200 bored softnet
81736 153536 0 0 3 0x14200 bored systqmp
31125 111185 0 0 3 0x14200 bored systq
67871 448225 0 0 3 0x40014200 bored softclock
*18999 234235 0 0 7 0x40014200 idle0
1 97222 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
shared mutex timeout r = 0 (0xffffffff826d40e8)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 timeout_run+0xb7 sys/kern/kern_timeout.c:670
#2 softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721
#3 softclock+0x11a sys/kern/kern_timeout.c:752
#4 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90
#5 Xsoftclock+0x1f
#6 acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206
#7 sched_idle+0x417 sys/kern/kern_sched.c:178
#8 proc_trampoline+0x1c
Process 18999 (idle0) thread 0xffff8000211697a0 (234235)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828ab108)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:90
#2 Xsoftclock+0x1f
#3 acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206
#4 sched_idle+0x417 sys/kern/kern_sched.c:178
#5 proc_trampoline+0x1c
shared mutex timeout r = 0 (0xffffffff826d40e8)
#0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline]
#0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182
#1 timeout_run+0xb7 sys/kern/kern_timeout.c:670
#2 softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721
#3 softclock+0x11a sys/kern/kern_timeout.c:752
#4 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90
#5 Xsoftclock+0x1f
#6 acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206
#7 sched_idle+0x417 sys/kern/kern_sched.c:178
#8 proc_trampoline+0x1c
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 9477 6349K 6349K 78643K 10567 0
pcb 13 8K 8K 78643K 13 0
rtable 105 3K 3K 78643K 333 0
ifaddr 39 10K 10K 78643K 39 0
counters 44 34K 34K 78643K 44 0
ioctlops 0 0K 2K 78643K 19 0
iov 0 0K 12K 78643K 2 0
mount 1 1K 1K 78643K 1 0
log 0 0K 0K 78643K 1 0
vnodes 1216 76K 76K 78643K 1221 0
UFS quota 1 32K 32K 78643K 1 0
UFS mount 5 36K 36K 78643K 5 0
shm 2 1K 1K 78643K 2 0
VM map 2 1K 1K 78643K 2 0
sem 12 1K 1K 78643K 16 0
dirhash 12 2K 2K 78643K 12 0
ACPI 1697 195K 286K 78643K 12598 0
file desc 7 21K 33K 78643K 320 0
sigio 0 0K 0K 78643K 2 0
proc 48 50K 70K 78643K 355 0
subproc 34 2K 2K 78643K 34 0
NFS srvsock 1 0K 0K 78643K 1 0
NFS daemon 1 16K 16K 78643K 1 0
in_multi 33 2K 2K 78643K 33 0
ether_multi 1 0K 0K 78643K 1 0
ISOFS mount 1 32K 32K 78643K 1 0
MSDOSFS mount 1 16K 16K 78643K 1 0
ttys 31 148K 148K 78643K 31 0
exec 0 0K 2K 78643K 317 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 609 63K 63K 78643K 5480 0
UVM aobj 3 2K 2K 78643K 3 0
memdesc 1 4K 4K 78643K 1 0
crypto data 1 1K 1K 78643K 1 0
NDP 5 0K 0K 78643K 9 0
temp 77 3971K 4035K 78643K 2377 0
kqueue 3 4K 4K 78643K 3 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
plcache 128 20 0 0 1 0 1 1 0 8 0
rtpcb 120 129 0 125 1 0 1 1 0 8 0
rtentry 112 45 0 1 2 0 2 2 0 8 0
unpcb 120 67 0 59 1 0 1 1 0 8 0
syncache 296 4 0 4 1 1 0 1 0 8 0
tcpqe 32 4369 0 4369 1 1 0 1 0 8 0
tcpcb 736 14 0 10 1 0 1 1 0 8 0
arp 64 6 0 0 1 0 1 1 0 8 0
inpcb 304 35 0 29 1 0 1 1 0 8 0
nd6 48 6 0 0 1 0 1 1 0 8 0
kcovpl 48 2 0 0 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 188 0 0 12 0 12 12 0 8 0
art_table 32 189 0 0 2 0 2 2 0 8 0
art_node 16 44 0 4 1 0 1 1 0 8 0
sysvmsgpl 40 8 0 8 1 1 0 1 0 8 0
semupl 112 3 0 3 1 1 0 1 0 8 0
semapl 112 10 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1703 0 306 88 0 88 88 0 8 0
ffsino 272 1703 0 306 94 0 94 94 0 8 0
nchpl 144 2223 0 623 60 0 60 60 0 8 0
uvmvnodes 72 1746 0 0 32 0 32 32 0 8 0
vnodes 224 1746 0 0 103 0 103 103 0 8 0
namei 1024 5240 0 5240 2 1 1 1 0 8 1
percpumem 16 33 0 0 1 0 1 1 0 8 0
scxspl 216 6562 0 6562 11 10 1 8 0 8 1
plimitpl 152 16 0 7 1 0 1 1 0 8 0
sigapl 424 507 0 475 4 0 4 4 0 8 0
futexpl 56 2431 0 2430 1 0 1 1 0 8 0
knotepl 112 62 0 42 1 0 1 1 0 8 0
kqueuepl 168 462 0 457 1 0 1 1 0 8 0
pipepl 336 73 0 62 3 1 2 2 0 8 1
fdescpl 496 491 0 475 3 0 3 3 0 8 0
filepl 152 2001 0 1900 6 1 5 5 0 8 1
lockfpl 104 5 0 4 1 0 1 1 0 8 0
lockfspl 48 3 0 2 1 0 1 1 0 8 0
sessionpl 144 17 0 7 1 0 1 1 0 8 0
pgrppl 48 17 0 7 1 0 1 1 0 8 0
ucredpl 96 69 0 60 1 0 1 1 0 8 0
zombiepl 144 475 0 475 2 1 1 1 0 8 1
processpl 1080 507 0 475 3 0 3 3 0 8 0
procpl 672 914 0 873 5 1 4 4 0 8 0
sockpl 480 235 0 217 4 0 4 4 0 8 1
mcl12k 12288 7 0 0 1 0 1 1 0 8 0
mcl8k 8192 7 0 0 1 0 1 1 0 8 0
mcl4k 4096 8 0 0 1 0 1 1 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 296 0 0 36 0 36 36 0 8 0
mtagpl 96 1 0 0 1 0 1 1 0 8 0
mbufpl 256 462 0 0 26 1 25 25 0 8 0
bufpl 280 3563 0 145 245 0 245 245 0 8 0
anonpl 24 226812 0 127193 613 1 612 612 0 186 0
amapchunkpl 152 16041 0 12050 156 0 156 156 0 158 0
amappl16 200 2997 0 499 133 1 132 132 0 8 0
amappl15 192 52 0 47 1 0 1 1 0 8 0
amappl14 184 141 0 139 1 0 1 1 0 8 0
amappl13 176 25 0 23 1 0 1 1 0 8 0
amappl12 168 36 0 28 1 0 1 1 0 8 0
amappl11 160 217 0 205 1 0 1 1 0 8 0
amappl10 152 14 0 9 1 0 1 1 0 8 0
amappl9 144 289 0 287 1 0 1 1 0 8 0
amappl8 136 292 0 254 2 0 2 2 0 8 0
amappl7 128 54 0 42 1 0 1 1 0 8 0
amappl6 120 96 0 81 1 0 1 1 0 8 0
amappl5 112 273 0 263 1 0 1 1 0 8 0
amappl4 104 741 0 710 1 0 1 1 0 8 0
amappl3 96 78 0 72 1 0 1 1 0 8 0
amappl2 88 519 0 470 3 1 2 2 0 8 0
amappl1 80 11331 0 10916 12 2 10 12 0 8 0
amappl 88 5184 0 4630 13 0 13 13 0 92 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma1024 1024 1 0 0 1 0 1 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 2 0 0 1 0 1 1 0 8 0
uaddrrnd 24 491 0 475 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 491 0 475 1 0 1 1 0 8 0
vmmpekpl 168 7000 0 6977 2 0 2 2 0 8 0
vmmpepl 168 63124 0 58877 313 10 303 311 0 357 113
vmsppl 368 490 0 475 2 0 2 2 0 8 0
rwobjpl 56 14743 0 11165 52 1 51 52 0 8 0
pdppl 4096 989 0 950 64 23 41 45 0 8 2
pvpl 32 415973 0 312707 851 5 846 851 0 265 0
pmappl 232 490 0 475 2 1 1 2 0 8 0
extentpl 40 58 0 40 1 0 1 1 0 8 0
phpool 112 337 0 28 9 0 9 9 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic(ffffffff823e90cf) at panic+0x15e sys/kern/subr_prf.c:218
witness_checkorder(fffffd806daa87a8,9,0) at witness_checkorder+0x1188 sys/kern/subr_witness.c:833
rw_enter_write(fffffd806daa8798) at rw_enter_write+0x5b sys/kern/kern_rwlock.c:128
solock(fffffd806daa8790) at solock+0x97 sys/kern/uipc_socket2.c:299
rtm_senddesync_timer(fffffd806daa8790) at rtm_senddesync_timer+0x1a sys/net/rtsock.c:454
timeout_run(fffffd8074008810) at timeout_run+0xcc sys/kern/kern_timeout.c:674
softclock_process_tick_timeout(fffffd8074008810,0) at softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721
softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:752
softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x1f
acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206
sched_idle(ffffffff8272eff0) at sched_idle+0x417 sys/kern/kern_sched.c:178
end trace frame: 0x0, count: -13
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp
x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206
sched_idle(ffff800020d58ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178
end trace frame: 0x0, count: 10
ddb{1}> trace
x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206
sched_idle(ffff800020d58ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178
end trace frame: 0x0, count: -5
---
This report 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 issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.