assert "atomic_load_int(&fdp->fd_nuserevents) == NUM" failed in kern_descrip.c
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syzbot
Aug 7, 2025, 6:12:33 PM8/7/25
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: efaa42f7482b replace the atexit and atfork spinlocks with ..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=12c501a2580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=69052bd4a04f5fc9c89a
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/a8810fc8ceb1/disk-efaa42f7.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/18ce50bc3a77/bsd-efaa42f7.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/bde95e939ef8/kernel-efaa42f7.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+69052b...@syzkaller.appspotmail.com
panic: kernel diagnostic assertion "atomic_load_int(&fdp->fd_nuserevents) == 0" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_descrip.c", line 1218
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
215848 69188 32767 0x10 0x4000000 0 syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff833759fd) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff833b0386,ffffffff83381f46,4c2,ffffffff8333c353) at __assert+0x29 sys/kern/subr_prf.c:-1
fdfree(ffff8000398294e8) at fdfree+0x349
exit1(ffff8000398294e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff8000398294e8,ffff80002a3c9cd0,ffff80002a3c9c20) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a3c9cd0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a3c9cd0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x76f7c31498c0, count: 7
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{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: kernel diagnostic assertion "atomic_load_int(&fdp->fd_nuserevents) == 0" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_descrip.c", line 1218
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff833759fd) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff833b0386,ffffffff83381f46,4c2,ffffffff8333c353) at __assert+0x29 sys/kern/subr_prf.c:-1
fdfree(ffff8000398294e8) at fdfree+0x349
exit1(ffff8000398294e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff8000398294e8,ffff80002a3c9cd0,ffff80002a3c9c20) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a3c9cd0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a3c9cd0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x76f7c31498c0, count: -8
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002a3c9a10
rbx 0xffff8000299eeddf
rdx 0
rcx 0xffff8000398294e8
rax 0xffff8000299edff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0xfcd3cd754cd4f74f
r11 0x3688087b928a7bfd
r12 0xffff8000299eebe0
r13 0
r14 0
r15 0x1
rip 0xffffffff82f50db5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80002a3c9a00
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=6943 pid=50620 tcnt=0 stat=onproc
flags process=1018<EXITING,SUGID,SINGLEEXIT> proc=2000<WEXIT>
runpri=32, usrpri=86, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0xffff8000398294e8 scnt=-1 ecnt=1
forw=0xffffffffffffffff, list=0xffff800039828558,0xffff800039829a28
process=0xffff80003c47bab0 user=0xffff80002a3c4000, vmspace=0xfffffd800c2fb5e0
estcpu=36, cpticks=16, pctcpu=0.0, user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
19895 124329 95456 0 2 0x2 syz-executor
69188 389864 467 32767 2 0x10 syz-executor
69188 215848 467 32767 7 0x4000010 syz-executor
13737 505680 86914 0 3 0x82 sbwait sshd-session
24783 423165 0 0 3 0x14200 bored sosplice
34829 154449 92859 32767 3 0x90 nanoslp syz-executor
68275 244638 57823 32767 3 0x90 nanoslp syz-executor
76747 351146 78854 32767 3 0x90 piperd syz-executor
29799 151888 60864 32767 3 0x90 piperd syz-executor
467 20546 60534 32767 3 0x90 nanoslp syz-executor
15839 233725 87687 32767 3 0x90 piperd syz-executor
57823 98633 95456 0 3 0x82 wait syz-executor
87687 403743 95456 0 3 0x82 wait syz-executor
60534 411571 95456 0 3 0x82 wait syz-executor
78854 281570 95456 0 3 0x82 wait syz-executor
60864 513729 95456 0 3 0x82 wait syz-executor
92859 181844 95456 0 3 0x82 wait syz-executor
95456 45687 49368 0 3 0x82 nanoslp syz-executor
49368 356888 52924 0 3 0x10008a sigsusp ksh
52924 308276 53038 0 3 0x98 kqread sshd-session
53038 101506 86914 0 3 0x92 kqread sshd-session
41943 424941 1 0 3 0x100083 ttyin getty
86914 420004 1 0 3 0x88 kqread sshd
69286 478515 47288 73 3 0x1100090 kqread syslogd
47288 2432 1 0 3 0x100082 sbwait syslogd
22169 430877 1 0 3 0x100080 kqread resolvd
60833 360116 92191 77 3 0x100092 kqread dhcpleased
51736 243145 92191 77 3 0x100092 kqread dhcpleased
92191 182385 1 0 3 0x80 kqread dhcpleased
53552 255610 0 0 3 0x14200 bored smr
77068 290075 0 0 2 0x14200 zerothread
74425 45983 0 0 3 0x14200 aiodoned aiodoned
36243 345577 0 0 3 0x14200 syncer update
48015 66734 0 0 3 0x14200 cleaner cleaner
87213 438110 0 0 3 0x14200 reaper reaper
93127 235552 0 0 3 0x14200 pgdaemon pagedaemon
64437 372354 0 0 3 0x14200 bored viomb
27773 28090 0 0 3 0x40014200 acpi0 acpi0
61026 392055 0 0 3 0x40014200 idle1
20369 72804 0 0 3 0x14200 bored softnet7
20069 44633 0 0 3 0x14200 bored softnet6
47526 399427 0 0 3 0x14200 bored softnet5
11604 235594 0 0 3 0x14200 bored softnet4
84340 453554 0 0 3 0x14200 bored softnet3
27311 178330 0 0 3 0x14200 bored softnet2
31230 486543 0 0 3 0x14200 bored softnet1
80087 196715 0 0 3 0x14200 bored softnet0
24120 429076 0 0 3 0x14200 bored systqmp
31876 498870 0 0 3 0x14200 bored systq
93288 464347 0 0 3 0x14200 tmoslp softclockmp
81429 148279 0 0 3 0x40014200 tmoslp softclock
37179 231898 0 0 3 0x40014200 idle0
1 367195 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10187 10952K 10968K 166960K 11271 0
pcb 17 12K 12K 166960K 17 0
rtable 175 5K 6K 166960K 273 0
pf 27 16K 16K 166960K 31 0
ifaddr 34 6K 7K 166960K 44 0
ifgroup 42 1K 2K 166960K 50 0
sysctl 3 1K 9K 166960K 10 0
counters 64 36K 36K 166960K 68 0
ioctlops 0 0K 2K 166960K 35 0
iov 0 0K 16K 166960K 132 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1335 84K 84K 166960K 1583 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 8 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 16 0
dirhash 12 2K 2K 166960K 18 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 17 61K 125K 166960K 478 0
sigio 0 0K 0K 166960K 2 0
proc 58 99K 131K 166960K 504 0
subproc 57 3K 4K 166960K 291 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 74 0
in_multi 77 5K 7K 166960K 120 0
ether_multi 1 0K 0K 166960K 5 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 61 281K 281K 166960K 61 0
exec 0 0K 1K 166960K 386 0
fusefs mount 1 32K 32K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 221 175K 197K 166960K 5462 0
UVM aobj 17 2K 3K 166960K 19 0
pinsyscall 41 82K 113K 166960K 1495 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 21 0
NDP 9 0K 2K 166960K 27 0
temp 45 8646K 8709K 166960K 5646 0
kqueue 16 22K 25K 166960K 72 0
SYN cache 2 16K 16K 166960K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 26 0 0 1 0 1 1 0 8 0
rtpcb 120 123 0 120 3 2 1 3 0 8 0
rtentry 176 102 0 23 5 0 5 5 0 8 0
unpcb 144 206 0 189 2 1 1 2 0 8 0
syncache 336 6 0 6 1 0 1 1 0 8 1
tcpqe 32 1 0 1 1 0 1 1 0 8 1
tcpcb 736 150 0 144 4 0 4 4 0 8 3
arp 128 10 0 2 1 0 1 1 0 8 0
ipq 40 1 0 0 1 0 1 1 0 8 0
ipqe 40 1 0 0 1 0 1 1 0 8 0
inpcb 328 432 0 423 7 3 4 5 0 8 3
ip6q 72 1 0 1 1 1 0 1 0 8 0
ip6af 40 3 0 3 1 1 0 1 0 8 0
nd6 144 23 0 8 1 0 1 1 0 8 0
kcovpl 48 32 0 26 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 460 0 99 29 2 27 29 0 8 3
art_table 40 461 0 99 5 0 5 5 0 8 0
art_node 32 102 0 31 1 0 1 1 0 8 0
sysvmsgpl 40 7 0 7 1 0 1 1 0 8 1
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 13 0 3 1 0 1 1 0 8 0
shmpl 112 16 0 2 1 0 1 1 0 8 0
dirhash 1024 21 0 4 3 0 3 3 0 8 0
dino2pl 256 1919 0 387 96 0 96 96 0 8 0
ffsino 296 1919 0 387 118 0 118 118 0 8 0
nchpl 144 2437 0 738 64 0 64 64 0 8 0
uvmvnodes 80 2219 0 0 46 0 46 46 0 8 0
vnodes 216 2219 0 0 124 0 124 124 0 8 0
namei 1024 7547 0 7547 2 1 1 2 0 8 1
percpumem 16 49 0 2 1 0 1 1 0 8 0
kstatmem 264 24 0 4 2 0 2 2 0 8 0
scxspl 216 8842 0 8842 9 8 1 8 1 8 1
plimitpl 152 183 0 161 2 0 2 2 0 8 1
sigapl 424 709 0 655 8 0 8 8 0 8 0
knotepl 120 311 0 0 10 0 10 10 0 8 0
kqueuepl 224 91 0 81 1 0 1 1 0 8 0
pipepl 344 325 0 298 9 2 7 9 0 8 4
fdescpl 528 686 0 655 4 1 3 4 0 8 0
filepl 160 3519 0 3328 14 2 12 14 0 8 2
lockfpl 104 158 0 156 1 0 1 1 0 8 0
lockfspl 48 27 0 25 1 0 1 1 0 8 0
sessionpl 144 48 0 33 1 0 1 1 0 8 0
pgrppl 48 92 0 70 1 0 1 1 0 8 0
ucredpl 104 388 0 371 1 0 1 1 0 8 0
zombiepl 144 657 0 655 1 0 1 1 0 8 0
processpl 1248 709 0 655 7 1 6 6 0 8 0
procpl 664 1126 0 1071 8 1 7 7 0 8 1
sosppl 168 1 0 1 1 0 1 1 0 8 1
sockpl 752 764 0 735 13 5 8 13 0 8 4
mcl64k 65536 4 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 117 0 0 15 0 15 15 0 8 0
mcl2k 2048 42 0 0 6 0 6 6 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 292 0 0 19 0 19 19 0 8 0
bufpl 280 3328 0 116 230 0 230 230 0 8 0
anonpl 32 7611 0 0 62 0 62 62 0 246 0
amapchunkpl 152 19154 0 18717 30 6 24 29 0 158 2
amappl16 200 2599 0 2577 14 3 11 11 0 8 8
amappl15 192 11 0 11 1 1 0 1 0 8 0
amappl14 184 123 0 112 1 0 1 1 0 8 0
amappl13 176 4 0 4 2 1 1 1 0 8 1
amappl12 168 1293 0 1262 2 0 2 2 0 8 0
amappl11 160 80 0 70 1 0 1 1 0 8 0
amappl10 152 10 0 10 1 1 0 1 0 8 0
amappl9 144 250 0 250 1 1 0 1 0 8 0
amappl8 136 19 0 16 1 0 1 1 0 8 0
amappl7 128 129 0 118 1 0 1 1 0 8 0
amappl6 120 175 0 170 1 0 1 1 0 8 0
amappl5 112 115 0 109 1 0 1 1 0 8 0
amappl4 104 276 0 258 1 0 1 1 0 8 0
amappl3 96 3003 0 2902 4 0 4 4 0 8 0
amappl2 88 624 0 562 2 0 2 2 0 8 0
amappl1 80 9712 0 9080 15 0 15 15 0 8 0
amappl 88 4756 0 4606 5 0 5 5 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 72 18 0 2 1 0 1 1 0 8 0
uaddrrnd 24 686 0 655 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 686 0 655 1 0 1 1 0 8 0
vmmpekpl 168 8204 0 8152 3 0 3 3 0 8 0
vmmpepl 168 50548 0 48620 105 4 101 101 0 357 3
vmsppl 488 685 0 655 7 2 5 6 0 8 0
rwobjpl 80 18520 0 15392 69 1 68 68 0 8 0
pdppl 4096 1380 0 1310 118 36 82 98 0 8 12
pvpl 32 14938 0 0 122 1 121 121 0 265 0
pmappl 256 685 0 655 4 1 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 303 0 42 8 0 8 8 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff8383bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153
__mp_lock(ffffffff838c27a0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff838c27a0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165
softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83
dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847
Xsoftclock() at Xsoftclock+0x27
__mp_lock(ffffffff838c27a0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff838c27a0) at __mp_lock+0x199 sys/kern/kern_lock.c:165
sysctl_file(ffff80002a3d56b8,4,200000000100,ffff80002a3d56e8,ffff800039828fb8) at sysctl_file+0x27ef sys/kern/kern_sysctl.c:1784
kern_sysctl(ffff80002a3d56b4,5,200000000100,ffff80002a3d56e8,0,37,e8c5fa6deb5ce64b) at kern_sysctl+0x139 sys/kern/kern_sysctl.c:733
sys_sysctl(ffff800039828fb8,ffff80002a3d5820,ffff80002a3d5770) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1
syscall(ffff80002a3d5820) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a3d5820) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xfb157419070, count: 1
ddb{0}> trace
x86_ipi_db(ffffffff8383bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153
__mp_lock(ffffffff838c27a0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff838c27a0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165
softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83
dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847
Xsoftclock() at Xsoftclock+0x27
__mp_lock(ffffffff838c27a0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff838c27a0) at __mp_lock+0x199 sys/kern/kern_lock.c:165
sysctl_file(ffff80002a3d56b8,4,200000000100,ffff80002a3d56e8,ffff800039828fb8) at sysctl_file+0x27ef sys/kern/kern_sysctl.c:1784
kern_sysctl(ffff80002a3d56b4,5,200000000100,ffff80002a3d56e8,0,37,e8c5fa6deb5ce64b) at kern_sysctl+0x139 sys/kern/kern_sysctl.c:733
sys_sysctl(ffff800039828fb8,ffff80002a3d5820,ffff80002a3d5770) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1
syscall(ffff80002a3d5820) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a3d5820) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xfb157419070, count: -14
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x25: addq $0x8,%rsp
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff833759fd) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff833b0386,ffffffff83381f46,4c2,ffffffff8333c353) at __assert+0x29 sys/kern/subr_prf.c:-1
fdfree(ffff8000398294e8) at fdfree+0x349
exit1(ffff8000398294e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff8000398294e8,ffff80002a3c9cd0,ffff80002a3c9c20) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a3c9cd0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a3c9cd0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x76f7c31498c0, count: 7
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff833759fd) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff833b0386,ffffffff83381f46,4c2,ffffffff8333c353) at __assert+0x29 sys/kern/subr_prf.c:-1
fdfree(ffff8000398294e8) at fdfree+0x349
exit1(ffff8000398294e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff8000398294e8,ffff80002a3c9cd0,ffff80002a3c9c20) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a3c9cd0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a3c9cd0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x76f7c31498c0, count: -8
---
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syzbot found the following issue on:
HEAD commit: efaa42f7482b replace the atexit and atfork spinlocks with ..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=12c501a2580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=69052bd4a04f5fc9c89a
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/a8810fc8ceb1/disk-efaa42f7.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/18ce50bc3a77/bsd-efaa42f7.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/bde95e939ef8/kernel-efaa42f7.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+69052b...@syzkaller.appspotmail.com
panic: kernel diagnostic assertion "atomic_load_int(&fdp->fd_nuserevents) == 0" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_descrip.c", line 1218
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
215848 69188 32767 0x10 0x4000000 0 syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff833759fd) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff833b0386,ffffffff83381f46,4c2,ffffffff8333c353) at __assert+0x29 sys/kern/subr_prf.c:-1
fdfree(ffff8000398294e8) at fdfree+0x349
exit1(ffff8000398294e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff8000398294e8,ffff80002a3c9cd0,ffff80002a3c9c20) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a3c9cd0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a3c9cd0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x76f7c31498c0, count: 7
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{1}>
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: kernel diagnostic assertion "atomic_load_int(&fdp->fd_nuserevents) == 0" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_descrip.c", line 1218
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff833759fd) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff833b0386,ffffffff83381f46,4c2,ffffffff8333c353) at __assert+0x29 sys/kern/subr_prf.c:-1
fdfree(ffff8000398294e8) at fdfree+0x349
exit1(ffff8000398294e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff8000398294e8,ffff80002a3c9cd0,ffff80002a3c9c20) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a3c9cd0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a3c9cd0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x76f7c31498c0, count: -8
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002a3c9a10
rbx 0xffff8000299eeddf
rdx 0
rcx 0xffff8000398294e8
rax 0xffff8000299edff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0xfcd3cd754cd4f74f
r11 0x3688087b928a7bfd
r12 0xffff8000299eebe0
r13 0
r14 0
r15 0x1
rip 0xffffffff82f50db5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80002a3c9a00
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=6943 pid=50620 tcnt=0 stat=onproc
flags process=1018<EXITING,SUGID,SINGLEEXIT> proc=2000<WEXIT>
runpri=32, usrpri=86, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0xffff8000398294e8 scnt=-1 ecnt=1
forw=0xffffffffffffffff, list=0xffff800039828558,0xffff800039829a28
process=0xffff80003c47bab0 user=0xffff80002a3c4000, vmspace=0xfffffd800c2fb5e0
estcpu=36, cpticks=16, pctcpu=0.0, user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
19895 124329 95456 0 2 0x2 syz-executor
69188 389864 467 32767 2 0x10 syz-executor
69188 215848 467 32767 7 0x4000010 syz-executor
13737 505680 86914 0 3 0x82 sbwait sshd-session
24783 423165 0 0 3 0x14200 bored sosplice
34829 154449 92859 32767 3 0x90 nanoslp syz-executor
68275 244638 57823 32767 3 0x90 nanoslp syz-executor
76747 351146 78854 32767 3 0x90 piperd syz-executor
29799 151888 60864 32767 3 0x90 piperd syz-executor
467 20546 60534 32767 3 0x90 nanoslp syz-executor
15839 233725 87687 32767 3 0x90 piperd syz-executor
57823 98633 95456 0 3 0x82 wait syz-executor
87687 403743 95456 0 3 0x82 wait syz-executor
60534 411571 95456 0 3 0x82 wait syz-executor
78854 281570 95456 0 3 0x82 wait syz-executor
60864 513729 95456 0 3 0x82 wait syz-executor
92859 181844 95456 0 3 0x82 wait syz-executor
95456 45687 49368 0 3 0x82 nanoslp syz-executor
49368 356888 52924 0 3 0x10008a sigsusp ksh
52924 308276 53038 0 3 0x98 kqread sshd-session
53038 101506 86914 0 3 0x92 kqread sshd-session
41943 424941 1 0 3 0x100083 ttyin getty
86914 420004 1 0 3 0x88 kqread sshd
69286 478515 47288 73 3 0x1100090 kqread syslogd
47288 2432 1 0 3 0x100082 sbwait syslogd
22169 430877 1 0 3 0x100080 kqread resolvd
60833 360116 92191 77 3 0x100092 kqread dhcpleased
51736 243145 92191 77 3 0x100092 kqread dhcpleased
92191 182385 1 0 3 0x80 kqread dhcpleased
53552 255610 0 0 3 0x14200 bored smr
77068 290075 0 0 2 0x14200 zerothread
74425 45983 0 0 3 0x14200 aiodoned aiodoned
36243 345577 0 0 3 0x14200 syncer update
48015 66734 0 0 3 0x14200 cleaner cleaner
87213 438110 0 0 3 0x14200 reaper reaper
93127 235552 0 0 3 0x14200 pgdaemon pagedaemon
64437 372354 0 0 3 0x14200 bored viomb
27773 28090 0 0 3 0x40014200 acpi0 acpi0
61026 392055 0 0 3 0x40014200 idle1
20369 72804 0 0 3 0x14200 bored softnet7
20069 44633 0 0 3 0x14200 bored softnet6
47526 399427 0 0 3 0x14200 bored softnet5
11604 235594 0 0 3 0x14200 bored softnet4
84340 453554 0 0 3 0x14200 bored softnet3
27311 178330 0 0 3 0x14200 bored softnet2
31230 486543 0 0 3 0x14200 bored softnet1
80087 196715 0 0 3 0x14200 bored softnet0
24120 429076 0 0 3 0x14200 bored systqmp
31876 498870 0 0 3 0x14200 bored systq
93288 464347 0 0 3 0x14200 tmoslp softclockmp
81429 148279 0 0 3 0x40014200 tmoslp softclock
37179 231898 0 0 3 0x40014200 idle0
1 367195 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10187 10952K 10968K 166960K 11271 0
pcb 17 12K 12K 166960K 17 0
rtable 175 5K 6K 166960K 273 0
pf 27 16K 16K 166960K 31 0
ifaddr 34 6K 7K 166960K 44 0
ifgroup 42 1K 2K 166960K 50 0
sysctl 3 1K 9K 166960K 10 0
counters 64 36K 36K 166960K 68 0
ioctlops 0 0K 2K 166960K 35 0
iov 0 0K 16K 166960K 132 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1335 84K 84K 166960K 1583 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 8 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 16 0
dirhash 12 2K 2K 166960K 18 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 17 61K 125K 166960K 478 0
sigio 0 0K 0K 166960K 2 0
proc 58 99K 131K 166960K 504 0
subproc 57 3K 4K 166960K 291 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 74 0
in_multi 77 5K 7K 166960K 120 0
ether_multi 1 0K 0K 166960K 5 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 61 281K 281K 166960K 61 0
exec 0 0K 1K 166960K 386 0
fusefs mount 1 32K 32K 166960K 1 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 221 175K 197K 166960K 5462 0
UVM aobj 17 2K 3K 166960K 19 0
pinsyscall 41 82K 113K 166960K 1495 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 21 0
NDP 9 0K 2K 166960K 27 0
temp 45 8646K 8709K 166960K 5646 0
kqueue 16 22K 25K 166960K 72 0
SYN cache 2 16K 16K 166960K 2 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 26 0 0 1 0 1 1 0 8 0
rtpcb 120 123 0 120 3 2 1 3 0 8 0
rtentry 176 102 0 23 5 0 5 5 0 8 0
unpcb 144 206 0 189 2 1 1 2 0 8 0
syncache 336 6 0 6 1 0 1 1 0 8 1
tcpqe 32 1 0 1 1 0 1 1 0 8 1
tcpcb 736 150 0 144 4 0 4 4 0 8 3
arp 128 10 0 2 1 0 1 1 0 8 0
ipq 40 1 0 0 1 0 1 1 0 8 0
ipqe 40 1 0 0 1 0 1 1 0 8 0
inpcb 328 432 0 423 7 3 4 5 0 8 3
ip6q 72 1 0 1 1 1 0 1 0 8 0
ip6af 40 3 0 3 1 1 0 1 0 8 0
nd6 144 23 0 8 1 0 1 1 0 8 0
kcovpl 48 32 0 26 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 460 0 99 29 2 27 29 0 8 3
art_table 40 461 0 99 5 0 5 5 0 8 0
art_node 32 102 0 31 1 0 1 1 0 8 0
sysvmsgpl 40 7 0 7 1 0 1 1 0 8 1
semupl 112 1 0 1 1 1 0 1 0 8 0
semapl 112 13 0 3 1 0 1 1 0 8 0
shmpl 112 16 0 2 1 0 1 1 0 8 0
dirhash 1024 21 0 4 3 0 3 3 0 8 0
dino2pl 256 1919 0 387 96 0 96 96 0 8 0
ffsino 296 1919 0 387 118 0 118 118 0 8 0
nchpl 144 2437 0 738 64 0 64 64 0 8 0
uvmvnodes 80 2219 0 0 46 0 46 46 0 8 0
vnodes 216 2219 0 0 124 0 124 124 0 8 0
namei 1024 7547 0 7547 2 1 1 2 0 8 1
percpumem 16 49 0 2 1 0 1 1 0 8 0
kstatmem 264 24 0 4 2 0 2 2 0 8 0
scxspl 216 8842 0 8842 9 8 1 8 1 8 1
plimitpl 152 183 0 161 2 0 2 2 0 8 1
sigapl 424 709 0 655 8 0 8 8 0 8 0
knotepl 120 311 0 0 10 0 10 10 0 8 0
kqueuepl 224 91 0 81 1 0 1 1 0 8 0
pipepl 344 325 0 298 9 2 7 9 0 8 4
fdescpl 528 686 0 655 4 1 3 4 0 8 0
filepl 160 3519 0 3328 14 2 12 14 0 8 2
lockfpl 104 158 0 156 1 0 1 1 0 8 0
lockfspl 48 27 0 25 1 0 1 1 0 8 0
sessionpl 144 48 0 33 1 0 1 1 0 8 0
pgrppl 48 92 0 70 1 0 1 1 0 8 0
ucredpl 104 388 0 371 1 0 1 1 0 8 0
zombiepl 144 657 0 655 1 0 1 1 0 8 0
processpl 1248 709 0 655 7 1 6 6 0 8 0
procpl 664 1126 0 1071 8 1 7 7 0 8 1
sosppl 168 1 0 1 1 0 1 1 0 8 1
sockpl 752 764 0 735 13 5 8 13 0 8 4
mcl64k 65536 4 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 117 0 0 15 0 15 15 0 8 0
mcl2k 2048 42 0 0 6 0 6 6 0 8 0
mtagpl 96 2 0 0 1 0 1 1 0 8 0
mbufpl 256 292 0 0 19 0 19 19 0 8 0
bufpl 280 3328 0 116 230 0 230 230 0 8 0
anonpl 32 7611 0 0 62 0 62 62 0 246 0
amapchunkpl 152 19154 0 18717 30 6 24 29 0 158 2
amappl16 200 2599 0 2577 14 3 11 11 0 8 8
amappl15 192 11 0 11 1 1 0 1 0 8 0
amappl14 184 123 0 112 1 0 1 1 0 8 0
amappl13 176 4 0 4 2 1 1 1 0 8 1
amappl12 168 1293 0 1262 2 0 2 2 0 8 0
amappl11 160 80 0 70 1 0 1 1 0 8 0
amappl10 152 10 0 10 1 1 0 1 0 8 0
amappl9 144 250 0 250 1 1 0 1 0 8 0
amappl8 136 19 0 16 1 0 1 1 0 8 0
amappl7 128 129 0 118 1 0 1 1 0 8 0
amappl6 120 175 0 170 1 0 1 1 0 8 0
amappl5 112 115 0 109 1 0 1 1 0 8 0
amappl4 104 276 0 258 1 0 1 1 0 8 0
amappl3 96 3003 0 2902 4 0 4 4 0 8 0
amappl2 88 624 0 562 2 0 2 2 0 8 0
amappl1 80 9712 0 9080 15 0 15 15 0 8 0
amappl 88 4756 0 4606 5 0 5 5 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 72 18 0 2 1 0 1 1 0 8 0
uaddrrnd 24 686 0 655 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 686 0 655 1 0 1 1 0 8 0
vmmpekpl 168 8204 0 8152 3 0 3 3 0 8 0
vmmpepl 168 50548 0 48620 105 4 101 101 0 357 3
vmsppl 488 685 0 655 7 2 5 6 0 8 0
rwobjpl 80 18520 0 15392 69 1 68 68 0 8 0
pdppl 4096 1380 0 1310 118 36 82 98 0 8 12
pvpl 32 14938 0 0 122 1 121 121 0 265 0
pmappl 256 685 0 655 4 1 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 303 0 42 8 0 8 8 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff8383bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153
__mp_lock(ffffffff838c27a0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff838c27a0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165
softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83
dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847
Xsoftclock() at Xsoftclock+0x27
__mp_lock(ffffffff838c27a0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff838c27a0) at __mp_lock+0x199 sys/kern/kern_lock.c:165
sysctl_file(ffff80002a3d56b8,4,200000000100,ffff80002a3d56e8,ffff800039828fb8) at sysctl_file+0x27ef sys/kern/kern_sysctl.c:1784
kern_sysctl(ffff80002a3d56b4,5,200000000100,ffff80002a3d56e8,0,37,e8c5fa6deb5ce64b) at kern_sysctl+0x139 sys/kern/kern_sysctl.c:733
sys_sysctl(ffff800039828fb8,ffff80002a3d5820,ffff80002a3d5770) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1
syscall(ffff80002a3d5820) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a3d5820) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xfb157419070, count: 1
ddb{0}> trace
x86_ipi_db(ffffffff8383bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline]
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153
__mp_lock(ffffffff838c27a0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff838c27a0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165
softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83
dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847
Xsoftclock() at Xsoftclock+0x27
__mp_lock(ffffffff838c27a0) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline]
__mp_lock(ffffffff838c27a0) at __mp_lock+0x199 sys/kern/kern_lock.c:165
sysctl_file(ffff80002a3d56b8,4,200000000100,ffff80002a3d56e8,ffff800039828fb8) at sysctl_file+0x27ef sys/kern/kern_sysctl.c:1784
kern_sysctl(ffff80002a3d56b4,5,200000000100,ffff80002a3d56e8,0,37,e8c5fa6deb5ce64b) at kern_sysctl+0x139 sys/kern/kern_sysctl.c:733
sys_sysctl(ffff800039828fb8,ffff80002a3d5820,ffff80002a3d5770) at sys_sysctl+0x3e5 sys/kern/kern_sysctl.c:-1
syscall(ffff80002a3d5820) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a3d5820) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xfb157419070, count: -14
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x25: addq $0x8,%rsp
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff833759fd) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff833b0386,ffffffff83381f46,4c2,ffffffff8333c353) at __assert+0x29 sys/kern/subr_prf.c:-1
fdfree(ffff8000398294e8) at fdfree+0x349
exit1(ffff8000398294e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff8000398294e8,ffff80002a3c9cd0,ffff80002a3c9c20) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a3c9cd0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a3c9cd0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x76f7c31498c0, count: 7
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff833759fd) at panic+0x1e5 sys/kern/subr_prf.c:198
__assert(ffffffff833b0386,ffffffff83381f46,4c2,ffffffff8333c353) at __assert+0x29 sys/kern/subr_prf.c:-1
fdfree(ffff8000398294e8) at fdfree+0x349
exit1(ffff8000398294e8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215
sys_exit(ffff8000398294e8,ffff80002a3c9cd0,ffff80002a3c9c20) at sys_exit+0x1a sys/kern/kern_exit.c:-1
syscall(ffff80002a3c9cd0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a3c9cd0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x76f7c31498c0, count: -8
---
This report is generated by a bot. It may contain errors.
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If you want to undo deduplication, reply with:
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syzbot
Nov 7, 2025, 2:36:20 PM11/7/25
to syzkaller-o...@googlegroups.com
Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.
Crashes did not happen for a while, no reproducer and no activity.
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