uvm_fault(0xffffffff82eaacd0, 0xfffffff97ce15c30, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at softclock_process_kclock_timeout+0x3e: movq timeout_kclock(%r15),%r13
TID PID UID PRFLAGS PFLAGS CPU COMMAND
softclock_process_kclock_timeout(fffffd8062e92e78,0) at softclock_process_kclock_timeout+0x3e sys/kern/kern_timeout.c:676
softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:754
softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206
sched_idle(ffffffff82cb1ff0) at sched_idle+0x41e sys/kern/kern_sched.c:183
end trace frame: 0x0, count: 9
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
*cpu0: uvm_fault(0xffffffff82eaacd0, 0xfffffff97ce15c30, 0, 1) -> e
ddb{0}> trace
softclock_process_kclock_timeout(fffffd8062e92e78,0) at softclock_process_kclock_timeout+0x3e sys/kern/kern_timeout.c:676
softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:754
softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206
sched_idle(ffffffff82cb1ff0) at sched_idle+0x41e sys/kern/kern_sched.c:183
end trace frame: 0x0, count: -6
ddb{0}> show registers
rdi 0xfffffd8062e92e78
rsi 0
rbp 0xffff80002a101fa0
rbx 0
rdx 0
rcx 0xffff80002a0fc298
rax 0xffffffffdfdfdfdf
r8 0
r9 0
r10 0x42a94d92f5cd0de1
r11 0x4c685d1389c6002d
r12 0xdfdfdfdfdfdfdfdf
r13 0xffffffff82e067e0 rdrand_tmo
r14 0xfffffd8062e92e78
r15 0xfffffff9f9f9f9d0
rip 0xffffffff81e72c4e softclock_process_kclock_timeout+0x3e
cs 0x8
rflags 0x10283 __ALIGN_SIZE+0xf283
rsp 0xffff80002a101f50
ss 0x10
softclock_process_kclock_timeout+0x3e: movq timeout_kclock(%r15),%r13
ddb{0}> show proc
PROC (idle0) tid=419273 pid=84561 tcnt=1 stat=onproc
flags process=14000<NOZOMBIE,SYSTEM> proc=40000200<SYSTEM,CPUPEG>
runpri=0, usrpri=50, slppri=0, nice=20
wchan=0x0, wmesg=, ps_single=0x0
forw=0x5becc937bc78d6d4, list=0xffff80002a0fca90,0xffff80002a0fc000
process=0xffff8000ffffec60 user=0xffff80002a0fd000, vmspace=0xffffffff82e96728
estcpu=0, cpticks=36718, pctcpu=0.0, user=0, sys=0, intr=0
ddb{0}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
45717 454799 21513 0 3 0x82 piperd syz-executor.1
25411 233370 21513 0 3 0x82 wait syz-executor.7
17898 231880 21513 0 3 0x82 piperd syz-executor.0
64432 164785 21513 0 3 0x82 piperd syz-executor.6
53522 400683 21513 0 3 0x82 piperd syz-executor.2
22323 40428 21513 0 3 0x82 piperd syz-executor.5
29186 417151 21513 0 3 0x82 piperd syz-executor.4
39324 119331 1 0 3 0x100083 ttyin getty
84489 364817 21513 0 3 0x82 piperd syz-executor.3
31053 394458 0 0 3 0x14200 acct acct
37978 419060 0 0 3 0x14280 nfsidl nfsio
68207 93384 0 0 3 0x14280 nfsidl nfsio
26222 303562 0 0 3 0x14280 nfsidl nfsio
90226 56921 0 0 3 0x14280 nfsidl nfsio
1721 229906 0 0 3 0x14280 nfsidl nfsio
14534 8207 0 0 3 0x14280 nfsidl nfsio
33533 83398 0 0 3 0x14280 nfsidl nfsio
21257 290264 0 0 3 0x14280 nfsidl nfsio
6275 187484 0 0 3 0x14280 nfsidl nfsio
45095 317697 0 0 3 0x14280 nfsidl nfsio
89215 310948 0 0 3 0x14280 nfsidl nfsio
44275 16553 0 0 3 0x14280 nfsidl nfsio
84636 297512 0 0 3 0x14280 nfsidl nfsio
67011 138854 0 0 3 0x14280 nfsidl nfsio
84725 508800 0 0 3 0x14280 nfsidl nfsio
81303 218137 0 0 3 0x14280 nfsidl nfsio
94977 49063 0 0 3 0x14280 nfsidl nfsio
25685 459983 0 0 3 0x14280 nfsidl nfsio
82081 483908 0 0 3 0x14280 nfsidl nfsio
21643 387892 0 0 3 0x14280 nfsidl nfsio
85666 260410 0 0 3 0x14200 bored sosplice
21513 450485 91429 0 3 0x2000082 wait syz-fuzzer
21513 53044 91429 0 3 0x6000082 thrsleep syz-fuzzer
21513 521302 91429 0 3 0x6000082 wait syz-fuzzer
21513 24000 91429 0 3 0x6000082 thrsleep syz-fuzzer
21513 448028 91429 0 3 0x6000082 thrsleep syz-fuzzer
21513 266529 91429 0 3 0x6000082 wait syz-fuzzer
21513 290762 91429 0 3 0x6000082 wait syz-fuzzer
21513 134047 91429 0 3 0x6000082 thrsleep syz-fuzzer
21513 219654 91429 0 3 0x6000082 wait syz-fuzzer
21513 360756 91429 0 3 0x6000082 thrsleep syz-fuzzer
21513 193436 91429 0 3 0x6000082 thrsleep syz-fuzzer
21513 520891 91429 0 3 0x6000082 thrsleep syz-fuzzer
21513 423954 91429 0 3 0x6000082 wait syz-fuzzer
21513 385216 91429 0 3 0x6000082 wait syz-fuzzer
21513 174939 91429 0 3 0x6000082 kqread syz-fuzzer
21513 378270 91429 0 3 0x6000082 wait syz-fuzzer
91429 153927 3017 0 3 0x10008a sigsusp ksh
3017 142047 55129 0 3 0x9a kqread sshd
55129 202123 1 0 3 0x88 kqread sshd
97592 17646 25183 74 3 0x1100092 bpf pflogd
25183 50309 1 0 3 0x80 netio pflogd
49636 82525 61985 73 3 0x1100090 kqread syslogd
61985 23871 1 0 3 0x100082 netio syslogd
65779 388238 1 0 3 0x100080 kqread resolvd
6285 470979 34904 77 3 0x100092 kqread dhcpleased
52906 398699 34904 77 3 0x100092 kqread dhcpleased
34904 199441 1 0 3 0x80 kqread dhcpleased
89167 35000 0 0 3 0x14200 bored smr
21546 513473 0 0 3 0x14200 pgzero zerothread
8622 160928 0 0 3 0x14200 aiodoned aiodoned
54641 519915 0 0 3 0x14200 syncer update
18420 443823 0 0 3 0x14200 cleaner cleaner
68946 272106 0 0 3 0x14200 reaper reaper
16590 81538 0 0 3 0x14200 pgdaemon pagedaemon
23899 384575 0 0 3 0x14200 bored viomb
16146 460257 0 0 3 0x40014200 acpi0 acpi0
57837 159640 0 0 7 0x40014200 idle1
5194 352109 0 0 3 0x14200 bored softnet3
72456 486885 0 0 3 0x14200 bored softnet2
2863 430473 0 0 3 0x14200 bored softnet1
35099 189826 0 0 3 0x14200 bored softnet0
96799 444798 0 0 3 0x14200 bored systqmp
20191 339905 0 0 3 0x14200 bored systq
81648 517213 0 0 3 0x14200 tmoslp softclockmp
218 392956 0 0 3 0x40014200 tmoslp softclock
*84561 419273 0 0 7 0x40014200 idle0
1 301159 0 0 3 0x80082 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex /syzkaller/managers/multicore/kernel/sys/kern/kern_timeout.c:57 r = 0 (0xffffffff82d114b0)
#0 witness_lock+0x447
#1 mtx_enter_try+0x104
#2 mtx_enter+0x4f sys/kern/kern_lock.c:266
#3 softclock+0x31 sys/kern/kern_timeout.c:745
#4 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90
#5 Xsoftclock+0x27
#6 acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206
#7 sched_idle+0x41e sys/kern/kern_sched.c:183
#8 proc_trampoline+0x10
Process 84561 (idle0) thread 0xffff80002a0fc298 (419273)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82eadd50)
#0 witness_lock+0x447
#1 softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88
#2 Xsoftclock+0x27
#3 acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206
#4 sched_idle+0x41e sys/kern/kern_sched.c:183
#5 proc_trampoline+0x10
exclusive mutex /syzkaller/managers/multicore/kernel/sys/kern/kern_timeout.c:57 r = 0 (0xffffffff82d114b0)
#0 witness_lock+0x447
#1 mtx_enter_try+0x104
#2 mtx_enter+0x4f sys/kern/kern_lock.c:266
#3 softclock+0x31 sys/kern/kern_timeout.c:745
#4 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90
#5 Xsoftclock+0x27
#6 acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206
#7 sched_idle+0x41e sys/kern/kern_sched.c:183
#8 proc_trampoline+0x10
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 10240 6515K 7603K 166960K 48279 0
pcb 15 22K 24K 166960K 2172 0
rtable 247 15K 16K 166960K 3240 0
pf 42 11K 11K 166960K 440 0
ifaddr 49 17K 18K 166960K 444 0
ifgroup 75 3K 3K 166960K 714 0
sysctl 4 1K 2K 166960K 13 0
counters 72 37K 37K 166960K 448 0
ioctlops 0 0K 4K 166960K 2502 0
iov 0 0K 34K 166960K 2330 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1544 97K 97K 166960K 13477 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 262 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 2529 0
dirhash 12 2K 2K 166960K 93 0
ACPI 1697 195K 286K 166960K 12548 0
file desc 11 37K 89K 166960K 22398 0
sigio 0 0K 0K 166960K 1154 0
proc 73 91K 128K 166960K 3473 0
subproc 104 6K 7K 166960K 943 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 1582 0
in_multi 99 7K 7K 166960K 1095 0
ether_multi 1 0K 0K 166960K 37 0
mrt 1 0K 0K 166960K 13 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 247 1102K 1102K 166960K 247 0
exec 0 0K 1K 166960K 4030 0
pfkey data 0 0K 1K 166960K 24 0
tdb 3 0K 0K 166960K 3 0
VM swap 8 62K 64K 166960K 10 0
UVM amap 541 839K 846K 166960K 214602 0
UVM aobj 131 6K 6K 166960K 131 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 756 0
NDP 16 0K 2K 166960K 348 0
temp 74 6772K 137848K 166960K 211736 0
kqueue 12 18K 28K 166960K 1793 0
SYN cache 2 36K 44K 166960K 3 0
ddb{0}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache 128 24 0 0 1 0 1 1 0 8 0
rtpcb 120 1087 0 1084 17 16 1 3 0 8 0
rtentry 112 1050 0 938 4 0 4 4 0 8 0
unpcb 144 16950 0 16935 169 168 1 11 0 8 0
syncache 320 245 0 245 37 37 0 1 0 8 0
sackhl 24 1 0 1 1 1 0 1 0 8 0
tcpqe 32 596 0 596 31 31 0 2 0 8 0
tcpcb 808 6619 0 6606 186 182 4 16 0 8 0
arp 120 219 0 199 1 0 1 1 0 8 0
ipq 40 7 0 7 2 2 0 1 0 8 0
ipqe 40 21 0 21 2 2 0 1 0 8 0
inpcb 376 17957 0 17937 246 241 5 17 0 8 0
nd6 136 232 0 208 1 0 1 1 0 8 0
pkpcb 40 195 0 195 17 17 0 1 0 8 0
kcovpl 48 72 0 64 1 0 1 1 0 8 0
ppxss 1168 63 0 63 16 16 0 1 0 8 0
pffrag 232 178 0 177 4 3 1 1 0 482 0
pffrnode 88 178 0 177 4 3 1 1 0 8 0
pffrent 40 551 0 550 5 4 1 1 0 8 0
pfosfp 40 1428 0 1005 5 0 5 5 0 8 0
pfosfpen 112 1428 0 714 21 0 21 21 0 8 0
pfstitem 24 759 0 735 1 0 1 1 0 8 0
pfstkey 128 763 0 739 4 2 2 2 0 8 0
pfstate 376 763 0 739 21 17 4 8 0 8 0
pfrule 1344 21 0 16 2 1 1 2 0 8 0
rttmr 136 1 0 1 1 1 0 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 3544 0 3070 66 36 30 31 0 8 0
art_table 32 3545 0 3070 4 0 4 4 0 8 0
art_node 16 1031 0 929 1 0 1 1 0 8 0
semapl 112 2523 0 2513 1 0 1 1 0 8 0
shmpl 112 128 0 0 4 0 4 4 0 8 0
dirhash 1024 71 0 54 3 0 3 3 0 8 0
dino2pl 256 30570 0 29044 96 0 96 96 0 8 0
ffsino 272 30570 0 29044 102 0 102 102 0 8 0
nchpl 144 60314 0 58654 63 0 63 63 0 8 0
uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0
vnodes 216 5926 0 0 330 0 330 330 0 8 0
namei 1024 200623 0 200623 7 6 1 2 0 8 1
percpumem 16 238 0 188 1 0 1 1 0 8 0
vcpupl 2048 107 0 0 14 0 14 14 0 8 0
vmpool 696 185 0 78 12 2 10 10 0 8 0
kstatmem 264 408 0 376 5 2 3 3 0 8 0
scxspl 216 170653 0 170653 48 47 1 8 1 8 1
plimitpl 152 1954 0 1938 1 0 1 1 0 8 0
sigapl 424 22620 0 22556 12 3 9 9 0 8 0
futexpl 64 179414 0 179414 1 0 1 1 0 8 1
knotepl 120 1089 0 0 12 1 11 11 0 8 0
kqueuepl 216 4826 0 4818 91 90 1 6 0 8 0
pipepl 320 4201 0 4173 115 112 3 13 0 8 0
fdescpl 496 22578 0 22554 13 8 5 5 0 8 0
filepl 152 131271 0 131030 198 183 15 25 0 8 2
lockfpl 104 6796 0 6794 8 7 1 2 0 8 0
lockfspl 48 2854 0 2852 1 0 1 1 0 8 0
sessionpl 144 92 0 75 1 0 1 1 0 8 0
pgrppl 48 595 0 578 1 0 1 1 0 8 0
ucredpl 104 17898 0 17884 1 0 1 1 0 8 0
zombiepl 144 22557 0 22556 3 2 1 1 0 8 0
processpl 1136 22620 0 22556 6 0 6 6 0 8 0
procpl 680 58908 0 58829 16 7 9 10 0 8 0
srpgc 96 105 0 105 29 29 0 1 0 8 0
sosppl 168 239 0 236 18 17 1 1 0 8 0
sockpl 584 36227 0 36193 349 344 5 24 0 8 0
mcl64k 65536 37 0 0 4 1 3 3 0 8 0
mcl16k 16384 18 0 0 3 0 3 3 0 8 0
mcl12k 12288 17 0 0 2 0 2 2 0 8 0
mcl9k 9216 18 0 0 2 0 2 2 0 8 0
mcl8k 8192 41 0 0 4 1 3 3 0 8 0
mcl4k 4096 56 0 0 5 2 3 4 0 8 0
mcl2k2 2112 11 0 0 1 0 1 1 0 8 0
mcl2k 2048 784 0 0 44 19 25 35 0 8 0
mtagpl 96 941 0 0 12 0 12 12 0 8 0
mbufpl 256 2098 0 0 83 0 83 83 0 8 0
bufpl 280 36896 0 30578 452 0 452 452 0 8 0
anonpl 24 2187451 0 2173581 184 70 114 123 0 186 0
amapchunkpl 152 672940 0 672154 68 28 40 44 0 158 0
amappl16 200 46173 0 45609 211 178 33 44 0 8 0
amappl15 192 26 0 26 3 3 0 1 0 8 0
amappl14 184 387 0 367 7 5 2 2 0 8 0
amappl13 176 27 0 26 1 0 1 1 0 8 0
amappl12 168 24338 0 24304 4 2 2 3 0 8 0
amappl11 160 54 0 40 1 0 1 1 0 8 0
amappl10 152 151 0 128 1 0 1 1 0 8 0
amappl9 144 332 0 330 1 0 1 1 0 8 0
amappl8 136 1121 0 935 10 3 7 7 0 8 0
amappl7 128 440 0 412 2 0 2 2 0 8 0
amappl6 120 1449 0 1428 1 0 1 1 0 8 0
amappl5 112 532 0 520 1 0 1 1 0 8 0
amappl4 104 1191 0 1160 2 1 1 2 0 8 0
amappl3 96 132580 0 132513 8 5 3 4 0 8 0
amappl2 88 23987 0 23903 4 1 3 3 0 8 0
amappl1 80 92781 0 92240 25 12 13 23 0 8 0
amappl 88 212970 0 212698 8 0 8 8 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 72 130 0 0 3 0 3 3 0 8 0
uaddrrnd 24 22763 0 22632 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 22763 0 22632 1 0 1 1 0 8 0
vmmpekpl 168 164434 0 164353 5 0 5 5 0 8 0
vmmpepl 168 1345196 0 1342691 574 423 151 174 0 357 8
vmsppl 448 22762 0 22632 21 5 16 16 0 8 0
rwobjpl 56 318770 0 310880 126 10 116 116 0 8 0
pdppl 4096 45533 0 45371 1096 922 174 177 0 8 12
pvpl 32 45616 0 0 368 0 368 368 0 265 0
pmappl 248 22762 0 22632 9 0 9 9 0 8 0
extentpl 40 56 0 38 1 0 1 1 0 8 0
phpool 112 2119 0 1543 17 0 17 17 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
softclock_process_kclock_timeout(fffffd8062e92e78,0) at softclock_process_kclock_timeout+0x3e sys/kern/kern_timeout.c:676
softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:754
softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90
Xsoftclock() at Xsoftclock+0x27
acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206
sched_idle(ffffffff82cb1ff0) at sched_idle+0x41e sys/kern/kern_sched.c:183
end trace frame: 0x0, count: -6
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp
x86_ipi_db(ffff800029cebff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206
sched_idle(ffff800029cebff0) at sched_idle+0x41e sys/kern/kern_sched.c:183
end trace frame: 0x0, count: 10
ddb{1}> trace
x86_ipi_db(ffff800029cebff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206
sched_idle(ffff800029cebff0) at sched_idle+0x41e sys/kern/kern_sched.c:183
end trace frame: 0x0, count: -5