uvm_fault: uvm_fault_upper_lookup
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syzbot
Jul 18, 2026, 8:43:30 AM (10 days ago) Jul 18
to syzkaller-o...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: bc321d44d2f5 Alberta moved to permanent -06 on 2026-06-18,..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=159a8746580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=4227f8d5056809b7e41a
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f79d164e907f/disk-bc321d44.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/8ef6d46afd20/bsd-bc321d44.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/49b4f7307c35/kernel-bc321d44.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4227f8...@syzkaller.appspotmail.com
uvm_fault(0xfffff9006cec77d0, 0x9fc00, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at uvm_fault_upper_lookup+0x18b: movq 0(%r14),%rax
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 95438 99029 32767 0x10 0 1 syz-executor
334752 79110 32767 0x10 0 0 syz-executor
uvm_fault_upper_lookup(ffff80003c406710,ffff80003c406748,ffff80003c406610,ffff80003c406690) at uvm_fault_upper_lookup+0x18b sys/uvm/uvm_fault.c:968
uvm_fault(fffff9006cec77d0,f4ea402f000,0,1) at uvm_fault+0x159 sys/uvm/uvm_fault.c:632
upageflttrap(ffff80003c4068b0,f4ea402ff50) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c4068b0) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7efefe82e5f0, count: 10
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: uvm_fault(0xfffff9006cec77d0, 0x9fc00, 0, 1) -> e
ddb{1}> show kasan
No such command
ddb{1}> trace
uvm_fault_upper_lookup(ffff80003c406710,ffff80003c406748,ffff80003c406610,ffff80003c406690) at uvm_fault_upper_lookup+0x18b sys/uvm/uvm_fault.c:968
uvm_fault(fffff9006cec77d0,f4ea402f000,0,1) at uvm_fault+0x159 sys/uvm/uvm_fault.c:632
upageflttrap(ffff80003c4068b0,f4ea402ff50) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c4068b0) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7efefe82e5f0, count: -5
ddb{1}> show registers
rdi 0
rsi 0x3
rbp 0xffff80003c406600
rbx 0
rdx 0
rcx 0xffff80003a3d27f0
rax 0xffff80003c406610
r8 0xffffffff81d97110 uvm_map_inentry_sp
r9 0
r10 0x4aea3995b159d8f9
r11 0xc0d436136d597b65
r12 0xffff80003c406748
r13 0xf4ea402c000
r14 0x9fc00 acpi_pdirpa+0x8ba71
r15 0x3
rip 0xffffffff818e277b uvm_fault_upper_lookup+0x18b
cs 0x8
rflags 0x10293 __ALIGN_SIZE+0xf293
rsp 0xffff80003c406570
ss 0
uvm_fault_upper_lookup+0x18b: movq 0(%r14),%rax
ddb{1}> show proc
PROC (syz-executor) tid=95438 pid=99029 tcnt=1 stat=onproc
flags process=10<SUGID> proc=0
runpri=58, usrpri=67, slppri=17, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80003a3d2028,0xffffffff83b42ca8
process=0xffff800045feb9d8 user=0xffff80003c401000, vmspace=0xfffff9006cec77d0
estcpu=17, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND
*99029 95438 69759 32767 7 0x10 0 syz-executor
79110 334752 73648 32767 7 0x10 0 syz-executor
79110 119836 73648 32767 3 0x10 0x4000080 fsleep syz-executor
79110 316478 73648 32767 2 0x10 0x4000000 syz-executor
50261 211140 61262 32767 2 0x10 0 syz-executor
50261 490068 61262 32767 3 0x10 0x4000080 fsleep syz-executor
50261 453504 61262 32767 3 0x10 0x4000080 fsleep syz-executor
71385 445898 25067 32767 2 0x10 0 syz-executor
71385 183700 25067 32767 3 0x10 0x4000080 fsleep syz-executor
9512 183660 24803 32767 2 0x10 0 syz-executor
9512 113489 24803 32767 3 0x10 0x4000080 fsleep syz-executor
9512 516684 24803 32767 3 0x10 0x4000080 fsleep syz-executor
56159 266301 51794 32767 2 0x10 0xc80 syz-executor
56159 125097 51794 32767 3 0x10 0x4000080 ttyout syz-executor
56159 207875 51794 32767 3 0x10 0x4000080 fsleep syz-executor
56159 240384 51794 32767 3 0x10 0x4000080 fsleep syz-executor
51794 379296 37140 32767 2 0x10 0xc80 syz-executor
72184 83055 82915 0 3 0x100002 0x80 sbwait arp
82915 379126 33889 0 3 0x100002 0x88 sigsusp sh
61262 386456 94656 32767 2 0x10 0xc80 syz-executor
25067 388811 74462 32767 2 0x10 0xc80 syz-executor
73648 132912 79322 32767 2 0x10 0xc80 syz-executor
69759 384254 47170 32767 3 0x10 0x80 nanoslp syz-executor
33889 132659 48942 0 3 0 0x80 wait syz-executor
24803 416406 78379 32767 2 0x10 0xc80 syz-executor
94656 89384 73519 0 3 0x2 0x80 wait syz-executor
37140 501696 73519 0 3 0x2 0x80 wait syz-executor
56659 458697 73519 0 3 0x2 0x80 wait syz-executor
74462 61938 73519 0 3 0x2 0x80 wait syz-executor
47170 124408 73519 0 3 0x2 0x80 wait syz-executor
48942 522006 73519 0 3 0x2 0x80 wait syz-executor
79322 46585 73519 0 3 0x2 0x80 wait syz-executor
78379 218635 73519 0 3 0x2 0x80 wait syz-executor
73519 509328 68840 0 3 0x2 0x80 kqread syz-executor
68840 166014 58538 0 3 0x100002 0x88 sigsusp ksh
58538 35969 79855 0 3 0x10 0x88 kqread sshd-session
79855 337129 10617 0 3 0x12 0x80 kqread sshd-session
42300 461567 1 0 3 0x100003 0x80 ttyin getty
10617 11091 1 0 3 0 0x88 kqread sshd
21483 254618 48124 73 3 0x1100010 0x80 kqread syslogd
48124 78384 1 0 3 0x100002 0x80 sbwait syslogd
33695 121298 1 0 3 0x100000 0x80 kqread resolvd
1603 116029 72783 77 3 0x100012 0x80 kqread dhcpleased
75713 191258 72783 77 3 0x100012 0x80 kqread dhcpleased
72783 133924 1 0 3 0 0x80 kqread dhcpleased
78102 315328 0 0 3 0x14000 0x200 bored smr
79916 3277 0 0 2 0x14000 0x200 zerothread
41910 84177 0 0 3 0x14000 0x200 aiodoned aiodoned
99690 350499 0 0 3 0x14000 0x200 syncer update
26926 491508 0 0 3 0x14000 0x200 cleaner cleaner
228 361364 0 0 3 0x14000 0x200 reaper reaper
38082 489858 0 0 3 0x14000 0x200 pgdaemon pagedaemon
34518 225305 0 0 3 0x14000 0x200 bored viomb
16891 127407 0 0 3 0x14000 0x40000200 acpi0 acpi0
57279 421826 0 0 3 0x14000 0x40000200 idle1
45613 167333 0 0 3 0x14000 0x200 bored softnet1
61284 510536 0 0 3 0x14000 0x200 bored softnet0
73277 105292 0 0 3 0x14000 0x200 bored systqmp
64536 332492 0 0 3 0x14000 0x200 bored systq
63521 446236 0 0 3 0x14000 0x200 tmoslp softclockmp
206 227815 0 0 3 0x14000 0x40000200 tmoslp softclock
41432 448282 0 0 3 0x14000 0x40000200 idle0
1 452824 0 0 3 0x2 0x80 wait init
0 0 -1 0 3 0x10000 0x200 scheduler swapper
ddb{1}> show all locks
Process 99029 (syz-executor) thread 0xffff80003a3d27f0 (95438)
shared rwlock amaplk r = 0 (0xfffff9006e14e0e8)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413
#2 uvm_fault_check+0x8a9 sys/uvm/uvm_fault.c:834
#3 uvm_fault+0x106 sys/uvm/uvm_fault.c:627
#4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
#5 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
#6 recall_trap+0x8
shared rwlock vmmaplk r = 0 (0xfffff9006cec78d0)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413
#2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880
#3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693
#4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627
#5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
#6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
#7 recall_trap+0x8
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11053 12018K 12034K 166960K 12144 0
pcb 17 14K 16K 166960K 19 0
rtable 223 6K 6K 166960K 329 0
pf 31 16K 16K 166960K 31 0
ifaddr 40 7K 7K 166960K 42 0
ifgroup 50 2K 2K 166960K 50 0
sysctl 1 1K 9K 166960K 5 0
counters 70 37K 37K 166960K 70 0
ioctlops 0 0K 2K 166960K 31 0
iov 0 0K 4K 166960K 7 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1289 81K 81K 166960K 1357 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 4 0
VM map 2 1K 1K 166960K 2 0
sem 8 0K 0K 166960K 40 0
dirhash 12 2K 2K 166960K 15 0
ACPI 1734 201K 291K 166960K 11964 0
file desc 26 97K 121K 166960K 268 0
sigio 0 0K 0K 166960K 2 0
proc 61 115K 147K 166960K 510 0
subproc 72 4K 4K 166960K 72 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 1 0K 0K 166960K 40 0
in_multi 89 6K 6K 166960K 92 0
ether_multi 1 0K 0K 166960K 1 0
mrt 1 0K 0K 166960K 11 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 79 360K 360K 166960K 79 0
exec 0 0K 1K 166960K 367 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 241 145K 160K 166960K 4012 0
UVM aobj 7 2K 4K 166960K 8 0
pinsyscall 48 96K 113K 166960K 1329 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 14 0
NDP 11 0K 1K 166960K 25 0
temp 36 9118K 9134K 166960K 3987 0
kqueue 19 27K 31K 166960K 50 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 28 0 0 1 0 1 1 0 8 0
rtpcb 120 37 0 33 1 0 1 1 0 8 0
rtentry 176 104 0 1 5 0 5 5 0 8 0
unpcb 144 106 0 85 1 0 1 1 0 8 0
syncache 336 5 0 5 1 0 1 1 0 8 1
tcpcb 736 187 0 183 13 4 9 13 0 8 8
arp 136 17 0 0 1 0 1 1 0 8 0
ipq 40 2 0 0 1 0 1 1 0 8 0
ipqe 40 4 0 2 1 0 1 1 0 8 0
inpcb 328 355 0 346 18 9 9 18 0 8 8
nd6 152 22 0 0 1 0 1 1 0 8 0
kcovpl 48 8 0 0 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 426 0 0 27 0 27 27 0 8 0
art_table 40 427 0 0 5 0 5 5 0 8 0
art_node 32 104 0 10 1 0 1 1 0 8 0
sysvmsgpl 40 1 0 1 1 0 1 1 0 8 1
semapl 72 38 0 32 1 0 1 1 0 8 0
shmpl 112 5 0 1 1 0 1 1 0 8 0
dirhash 1024 19 0 2 3 0 3 3 0 8 0
dino2pl 256 1743 0 278 92 0 92 92 0 8 0
ffsino 296 1743 0 278 113 0 113 113 0 8 0
nchpl 144 2117 0 424 63 0 63 63 0 8 0
vnodes 216 1824 0 0 102 0 102 102 0 8 0
namei 1024 6264 0 6264 2 0 2 2 0 8 2
percpumem 16 51 0 0 1 0 1 1 0 8 0
kstatmem 264 25 0 0 2 0 2 2 0 8 0
scxspl 216 7487 0 7487 9 3 6 6 1 8 6
plimitpl 152 52 0 28 2 0 2 2 0 8 1
sigapl 424 557 0 503 7 0 7 7 0 8 0
knotepl 120 271 0 0 9 0 9 9 0 8 0
kqueuepl 224 57 0 43 2 0 2 2 0 8 1
pipepl 344 132 0 105 3 0 3 3 0 8 0
fdescpl 528 541 0 503 3 0 3 3 0 8 0
filepl 160 2248 0 2030 17 0 17 17 0 8 7
lockfpl 104 29 0 26 1 0 1 1 0 8 0
lockfspl 48 12 0 9 1 0 1 1 0 8 0
sessionpl 144 24 0 8 1 0 1 1 0 8 0
pgrppl 48 35 0 11 1 0 1 1 0 8 0
ucredpl 104 239 0 221 1 0 1 1 0 8 0
zombiepl 144 504 0 503 1 0 1 1 0 8 0
processpl 1232 557 0 503 5 0 5 5 0 8 0
procpl 664 780 0 716 6 0 6 6 0 8 0
sosppl 176 7 0 7 1 0 1 1 0 8 1
sockpl 752 501 0 467 23 12 11 23 0 8 7
mcl64k 65536 3 0 0 1 0 1 1 0 8 0
mcl12k 12288 1 0 0 1 0 1 1 0 8 0
mcl9k128 9344 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 124 0 0 16 0 16 16 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 25 0 0 4 0 4 4 0 8 0
mextrefs 64 24 0 0 1 0 1 1 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 209 0 0 14 0 14 14 0 8 0
bufpl 272 2448 0 102 157 0 157 157 0 8 0
anonpl 32 9299 0 0 75 0 75 75 0 247 0
amapchunkpl 152 12140 0 11613 35 0 35 35 0 158 13
amappl16 200 2673 0 2654 15 1 14 15 0 8 11
amappl15 192 8 0 7 1 0 1 1 0 8 0
amappl14 184 400 0 396 1 0 1 1 0 8 0
amappl13 176 136 0 125 1 0 1 1 0 8 0
amappl12 168 797 0 762 2 0 2 2 0 8 0
amappl11 160 10 0 10 1 1 0 1 0 8 0
amappl10 152 69 0 59 1 0 1 1 0 8 0
amappl9 144 306 0 306 1 1 0 1 0 8 0
amappl8 136 94 0 93 1 0 1 1 0 8 0
amappl7 128 136 0 123 1 0 1 1 0 8 0
amappl6 120 170 0 168 1 0 1 1 0 8 0
amappl5 112 93 0 86 1 0 1 1 0 8 0
amappl4 104 254 0 237 1 0 1 1 0 8 0
amappl3 96 2215 0 2089 5 1 4 4 0 8 0
amappl2 88 505 0 451 2 0 2 2 0 8 0
amappl1 80 10570 0 9962 14 0 14 14 0 8 0
amappl 88 3333 0 3158 5 0 5 5 0 92 0
uvmvnodes 80 99 0 0 3 0 3 3 0 8 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 7 0 1 1 0 1 1 0 8 0
uaddrrnd 24 541 0 503 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 541 0 503 1 0 1 1 0 8 0
vmmpekpl 168 6151 0 6120 2 0 2 2 0 8 0
vmmpepl 168 43927 0 41847 102 0 102 102 0 357 8
vmsppl 488 540 0 503 7 1 6 6 0 8 0
rwobjpl 80 16155 0 15163 26 0 26 26 0 8 2
pdppl 4096 1089 0 1006 105 20 85 95 0 8 2
pvpl 32 16642 0 0 135 0 135 135 0 265 0
pmappl 256 540 0 503 4 1 3 3 0 8 0
extentpl 40 46 0 28 1 0 1 1 0 8 0
phpool 112 444 0 27 12 0 12 12 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff83984ff0) 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
end of kernel
end trace frame: 0x79f976545270, count: 12
ddb{0}> trace
x86_ipi_db(ffffffff83984ff0) 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
end of kernel
end trace frame: 0x79f976545270, count: -3
ddb{0}> machine ddbcpu 1
Stopped at uvm_fault_upper_lookup+0x18b: movq 0(%r14),%rax
uvm_fault_upper_lookup(ffff80003c406710,ffff80003c406748,ffff80003c406610,ffff80003c406690) at uvm_fault_upper_lookup+0x18b sys/uvm/uvm_fault.c:968
uvm_fault(fffff9006cec77d0,f4ea402f000,0,1) at uvm_fault+0x159 sys/uvm/uvm_fault.c:632
upageflttrap(ffff80003c4068b0,f4ea402ff50) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c4068b0) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7efefe82e5f0, count: 10
ddb{1}> trace
uvm_fault_upper_lookup(ffff80003c406710,ffff80003c406748,ffff80003c406610,ffff80003c406690) at uvm_fault_upper_lookup+0x18b sys/uvm/uvm_fault.c:968
uvm_fault(fffff9006cec77d0,f4ea402f000,0,1) at uvm_fault+0x159 sys/uvm/uvm_fault.c:632
upageflttrap(ffff80003c4068b0,f4ea402ff50) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c4068b0) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7efefe82e5f0, count: -5
---
This report is generated by a bot. It may contain errors.
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If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: bc321d44d2f5 Alberta moved to permanent -06 on 2026-06-18,..
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=159a8746580000
kernel config: https://syzkaller.appspot.com/x/.config?x=7058272de1526588
dashboard link: https://syzkaller.appspot.com/bug?extid=4227f8d5056809b7e41a
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f79d164e907f/disk-bc321d44.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/8ef6d46afd20/bsd-bc321d44.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/49b4f7307c35/kernel-bc321d44.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4227f8...@syzkaller.appspotmail.com
uvm_fault(0xfffff9006cec77d0, 0x9fc00, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at uvm_fault_upper_lookup+0x18b: movq 0(%r14),%rax
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 95438 99029 32767 0x10 0 1 syz-executor
334752 79110 32767 0x10 0 0 syz-executor
uvm_fault_upper_lookup(ffff80003c406710,ffff80003c406748,ffff80003c406610,ffff80003c406690) at uvm_fault_upper_lookup+0x18b sys/uvm/uvm_fault.c:968
uvm_fault(fffff9006cec77d0,f4ea402f000,0,1) at uvm_fault+0x159 sys/uvm/uvm_fault.c:632
upageflttrap(ffff80003c4068b0,f4ea402ff50) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c4068b0) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7efefe82e5f0, count: 10
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: uvm_fault(0xfffff9006cec77d0, 0x9fc00, 0, 1) -> e
ddb{1}> show kasan
No such command
ddb{1}> trace
uvm_fault_upper_lookup(ffff80003c406710,ffff80003c406748,ffff80003c406610,ffff80003c406690) at uvm_fault_upper_lookup+0x18b sys/uvm/uvm_fault.c:968
uvm_fault(fffff9006cec77d0,f4ea402f000,0,1) at uvm_fault+0x159 sys/uvm/uvm_fault.c:632
upageflttrap(ffff80003c4068b0,f4ea402ff50) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c4068b0) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7efefe82e5f0, count: -5
ddb{1}> show registers
rdi 0
rsi 0x3
rbp 0xffff80003c406600
rbx 0
rdx 0
rcx 0xffff80003a3d27f0
rax 0xffff80003c406610
r8 0xffffffff81d97110 uvm_map_inentry_sp
r9 0
r10 0x4aea3995b159d8f9
r11 0xc0d436136d597b65
r12 0xffff80003c406748
r13 0xf4ea402c000
r14 0x9fc00 acpi_pdirpa+0x8ba71
r15 0x3
rip 0xffffffff818e277b uvm_fault_upper_lookup+0x18b
cs 0x8
rflags 0x10293 __ALIGN_SIZE+0xf293
rsp 0xffff80003c406570
ss 0
uvm_fault_upper_lookup+0x18b: movq 0(%r14),%rax
ddb{1}> show proc
PROC (syz-executor) tid=95438 pid=99029 tcnt=1 stat=onproc
flags process=10<SUGID> proc=0
runpri=58, usrpri=67, slppri=17, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80003a3d2028,0xffffffff83b42ca8
process=0xffff800045feb9d8 user=0xffff80003c401000, vmspace=0xfffff9006cec77d0
estcpu=17, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND
*99029 95438 69759 32767 7 0x10 0 syz-executor
79110 334752 73648 32767 7 0x10 0 syz-executor
79110 119836 73648 32767 3 0x10 0x4000080 fsleep syz-executor
79110 316478 73648 32767 2 0x10 0x4000000 syz-executor
50261 211140 61262 32767 2 0x10 0 syz-executor
50261 490068 61262 32767 3 0x10 0x4000080 fsleep syz-executor
50261 453504 61262 32767 3 0x10 0x4000080 fsleep syz-executor
71385 445898 25067 32767 2 0x10 0 syz-executor
71385 183700 25067 32767 3 0x10 0x4000080 fsleep syz-executor
9512 183660 24803 32767 2 0x10 0 syz-executor
9512 113489 24803 32767 3 0x10 0x4000080 fsleep syz-executor
9512 516684 24803 32767 3 0x10 0x4000080 fsleep syz-executor
56159 266301 51794 32767 2 0x10 0xc80 syz-executor
56159 125097 51794 32767 3 0x10 0x4000080 ttyout syz-executor
56159 207875 51794 32767 3 0x10 0x4000080 fsleep syz-executor
56159 240384 51794 32767 3 0x10 0x4000080 fsleep syz-executor
51794 379296 37140 32767 2 0x10 0xc80 syz-executor
72184 83055 82915 0 3 0x100002 0x80 sbwait arp
82915 379126 33889 0 3 0x100002 0x88 sigsusp sh
61262 386456 94656 32767 2 0x10 0xc80 syz-executor
25067 388811 74462 32767 2 0x10 0xc80 syz-executor
73648 132912 79322 32767 2 0x10 0xc80 syz-executor
69759 384254 47170 32767 3 0x10 0x80 nanoslp syz-executor
33889 132659 48942 0 3 0 0x80 wait syz-executor
24803 416406 78379 32767 2 0x10 0xc80 syz-executor
94656 89384 73519 0 3 0x2 0x80 wait syz-executor
37140 501696 73519 0 3 0x2 0x80 wait syz-executor
56659 458697 73519 0 3 0x2 0x80 wait syz-executor
74462 61938 73519 0 3 0x2 0x80 wait syz-executor
47170 124408 73519 0 3 0x2 0x80 wait syz-executor
48942 522006 73519 0 3 0x2 0x80 wait syz-executor
79322 46585 73519 0 3 0x2 0x80 wait syz-executor
78379 218635 73519 0 3 0x2 0x80 wait syz-executor
73519 509328 68840 0 3 0x2 0x80 kqread syz-executor
68840 166014 58538 0 3 0x100002 0x88 sigsusp ksh
58538 35969 79855 0 3 0x10 0x88 kqread sshd-session
79855 337129 10617 0 3 0x12 0x80 kqread sshd-session
42300 461567 1 0 3 0x100003 0x80 ttyin getty
10617 11091 1 0 3 0 0x88 kqread sshd
21483 254618 48124 73 3 0x1100010 0x80 kqread syslogd
48124 78384 1 0 3 0x100002 0x80 sbwait syslogd
33695 121298 1 0 3 0x100000 0x80 kqread resolvd
1603 116029 72783 77 3 0x100012 0x80 kqread dhcpleased
75713 191258 72783 77 3 0x100012 0x80 kqread dhcpleased
72783 133924 1 0 3 0 0x80 kqread dhcpleased
78102 315328 0 0 3 0x14000 0x200 bored smr
79916 3277 0 0 2 0x14000 0x200 zerothread
41910 84177 0 0 3 0x14000 0x200 aiodoned aiodoned
99690 350499 0 0 3 0x14000 0x200 syncer update
26926 491508 0 0 3 0x14000 0x200 cleaner cleaner
228 361364 0 0 3 0x14000 0x200 reaper reaper
38082 489858 0 0 3 0x14000 0x200 pgdaemon pagedaemon
34518 225305 0 0 3 0x14000 0x200 bored viomb
16891 127407 0 0 3 0x14000 0x40000200 acpi0 acpi0
57279 421826 0 0 3 0x14000 0x40000200 idle1
45613 167333 0 0 3 0x14000 0x200 bored softnet1
61284 510536 0 0 3 0x14000 0x200 bored softnet0
73277 105292 0 0 3 0x14000 0x200 bored systqmp
64536 332492 0 0 3 0x14000 0x200 bored systq
63521 446236 0 0 3 0x14000 0x200 tmoslp softclockmp
206 227815 0 0 3 0x14000 0x40000200 tmoslp softclock
41432 448282 0 0 3 0x14000 0x40000200 idle0
1 452824 0 0 3 0x2 0x80 wait init
0 0 -1 0 3 0x10000 0x200 scheduler swapper
ddb{1}> show all locks
Process 99029 (syz-executor) thread 0xffff80003a3d27f0 (95438)
shared rwlock amaplk r = 0 (0xfffff9006e14e0e8)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413
#2 uvm_fault_check+0x8a9 sys/uvm/uvm_fault.c:834
#3 uvm_fault+0x106 sys/uvm/uvm_fault.c:627
#4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
#5 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
#6 recall_trap+0x8
shared rwlock vmmaplk r = 0 (0xfffff9006cec78d0)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413
#2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880
#3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693
#4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627
#5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
#6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
#7 recall_trap+0x8
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11053 12018K 12034K 166960K 12144 0
pcb 17 14K 16K 166960K 19 0
rtable 223 6K 6K 166960K 329 0
pf 31 16K 16K 166960K 31 0
ifaddr 40 7K 7K 166960K 42 0
ifgroup 50 2K 2K 166960K 50 0
sysctl 1 1K 9K 166960K 5 0
counters 70 37K 37K 166960K 70 0
ioctlops 0 0K 2K 166960K 31 0
iov 0 0K 4K 166960K 7 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1289 81K 81K 166960K 1357 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 9K 166960K 4 0
VM map 2 1K 1K 166960K 2 0
sem 8 0K 0K 166960K 40 0
dirhash 12 2K 2K 166960K 15 0
ACPI 1734 201K 291K 166960K 11964 0
file desc 26 97K 121K 166960K 268 0
sigio 0 0K 0K 166960K 2 0
proc 61 115K 147K 166960K 510 0
subproc 72 4K 4K 166960K 72 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 1 0K 0K 166960K 40 0
in_multi 89 6K 6K 166960K 92 0
ether_multi 1 0K 0K 166960K 1 0
mrt 1 0K 0K 166960K 11 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 79 360K 360K 166960K 79 0
exec 0 0K 1K 166960K 367 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 241 145K 160K 166960K 4012 0
UVM aobj 7 2K 4K 166960K 8 0
pinsyscall 48 96K 113K 166960K 1329 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 14 0
NDP 11 0K 1K 166960K 25 0
temp 36 9118K 9134K 166960K 3987 0
kqueue 19 27K 31K 166960K 50 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 28 0 0 1 0 1 1 0 8 0
rtpcb 120 37 0 33 1 0 1 1 0 8 0
rtentry 176 104 0 1 5 0 5 5 0 8 0
unpcb 144 106 0 85 1 0 1 1 0 8 0
syncache 336 5 0 5 1 0 1 1 0 8 1
tcpcb 736 187 0 183 13 4 9 13 0 8 8
arp 136 17 0 0 1 0 1 1 0 8 0
ipq 40 2 0 0 1 0 1 1 0 8 0
ipqe 40 4 0 2 1 0 1 1 0 8 0
inpcb 328 355 0 346 18 9 9 18 0 8 8
nd6 152 22 0 0 1 0 1 1 0 8 0
kcovpl 48 8 0 0 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 426 0 0 27 0 27 27 0 8 0
art_table 40 427 0 0 5 0 5 5 0 8 0
art_node 32 104 0 10 1 0 1 1 0 8 0
sysvmsgpl 40 1 0 1 1 0 1 1 0 8 1
semapl 72 38 0 32 1 0 1 1 0 8 0
shmpl 112 5 0 1 1 0 1 1 0 8 0
dirhash 1024 19 0 2 3 0 3 3 0 8 0
dino2pl 256 1743 0 278 92 0 92 92 0 8 0
ffsino 296 1743 0 278 113 0 113 113 0 8 0
nchpl 144 2117 0 424 63 0 63 63 0 8 0
vnodes 216 1824 0 0 102 0 102 102 0 8 0
namei 1024 6264 0 6264 2 0 2 2 0 8 2
percpumem 16 51 0 0 1 0 1 1 0 8 0
kstatmem 264 25 0 0 2 0 2 2 0 8 0
scxspl 216 7487 0 7487 9 3 6 6 1 8 6
plimitpl 152 52 0 28 2 0 2 2 0 8 1
sigapl 424 557 0 503 7 0 7 7 0 8 0
knotepl 120 271 0 0 9 0 9 9 0 8 0
kqueuepl 224 57 0 43 2 0 2 2 0 8 1
pipepl 344 132 0 105 3 0 3 3 0 8 0
fdescpl 528 541 0 503 3 0 3 3 0 8 0
filepl 160 2248 0 2030 17 0 17 17 0 8 7
lockfpl 104 29 0 26 1 0 1 1 0 8 0
lockfspl 48 12 0 9 1 0 1 1 0 8 0
sessionpl 144 24 0 8 1 0 1 1 0 8 0
pgrppl 48 35 0 11 1 0 1 1 0 8 0
ucredpl 104 239 0 221 1 0 1 1 0 8 0
zombiepl 144 504 0 503 1 0 1 1 0 8 0
processpl 1232 557 0 503 5 0 5 5 0 8 0
procpl 664 780 0 716 6 0 6 6 0 8 0
sosppl 176 7 0 7 1 0 1 1 0 8 1
sockpl 752 501 0 467 23 12 11 23 0 8 7
mcl64k 65536 3 0 0 1 0 1 1 0 8 0
mcl12k 12288 1 0 0 1 0 1 1 0 8 0
mcl9k128 9344 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 3 0 0 1 0 1 1 0 8 0
mcl4k 4096 124 0 0 16 0 16 16 0 8 0
mcl2k2 2112 1 0 0 1 0 1 1 0 8 0
mcl2k 2048 25 0 0 4 0 4 4 0 8 0
mextrefs 64 24 0 0 1 0 1 1 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 209 0 0 14 0 14 14 0 8 0
bufpl 272 2448 0 102 157 0 157 157 0 8 0
anonpl 32 9299 0 0 75 0 75 75 0 247 0
amapchunkpl 152 12140 0 11613 35 0 35 35 0 158 13
amappl16 200 2673 0 2654 15 1 14 15 0 8 11
amappl15 192 8 0 7 1 0 1 1 0 8 0
amappl14 184 400 0 396 1 0 1 1 0 8 0
amappl13 176 136 0 125 1 0 1 1 0 8 0
amappl12 168 797 0 762 2 0 2 2 0 8 0
amappl11 160 10 0 10 1 1 0 1 0 8 0
amappl10 152 69 0 59 1 0 1 1 0 8 0
amappl9 144 306 0 306 1 1 0 1 0 8 0
amappl8 136 94 0 93 1 0 1 1 0 8 0
amappl7 128 136 0 123 1 0 1 1 0 8 0
amappl6 120 170 0 168 1 0 1 1 0 8 0
amappl5 112 93 0 86 1 0 1 1 0 8 0
amappl4 104 254 0 237 1 0 1 1 0 8 0
amappl3 96 2215 0 2089 5 1 4 4 0 8 0
amappl2 88 505 0 451 2 0 2 2 0 8 0
amappl1 80 10570 0 9962 14 0 14 14 0 8 0
amappl 88 3333 0 3158 5 0 5 5 0 92 0
uvmvnodes 80 99 0 0 3 0 3 3 0 8 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 7 0 1 1 0 1 1 0 8 0
uaddrrnd 24 541 0 503 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 541 0 503 1 0 1 1 0 8 0
vmmpekpl 168 6151 0 6120 2 0 2 2 0 8 0
vmmpepl 168 43927 0 41847 102 0 102 102 0 357 8
vmsppl 488 540 0 503 7 1 6 6 0 8 0
rwobjpl 80 16155 0 15163 26 0 26 26 0 8 2
pdppl 4096 1089 0 1006 105 20 85 95 0 8 2
pvpl 32 16642 0 0 135 0 135 135 0 265 0
pmappl 256 540 0 503 4 1 3 3 0 8 0
extentpl 40 46 0 28 1 0 1 1 0 8 0
phpool 112 444 0 27 12 0 12 12 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff83984ff0) 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
end of kernel
end trace frame: 0x79f976545270, count: 12
ddb{0}> trace
x86_ipi_db(ffffffff83984ff0) 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
end of kernel
end trace frame: 0x79f976545270, count: -3
ddb{0}> machine ddbcpu 1
Stopped at uvm_fault_upper_lookup+0x18b: movq 0(%r14),%rax
uvm_fault_upper_lookup(ffff80003c406710,ffff80003c406748,ffff80003c406610,ffff80003c406690) at uvm_fault_upper_lookup+0x18b sys/uvm/uvm_fault.c:968
uvm_fault(fffff9006cec77d0,f4ea402f000,0,1) at uvm_fault+0x159 sys/uvm/uvm_fault.c:632
upageflttrap(ffff80003c4068b0,f4ea402ff50) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c4068b0) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7efefe82e5f0, count: 10
ddb{1}> trace
uvm_fault_upper_lookup(ffff80003c406710,ffff80003c406748,ffff80003c406610,ffff80003c406690) at uvm_fault_upper_lookup+0x18b sys/uvm/uvm_fault.c:968
uvm_fault(fffff9006cec77d0,f4ea402f000,0,1) at uvm_fault+0x159 sys/uvm/uvm_fault.c:632
upageflttrap(ffff80003c4068b0,f4ea402ff50) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80003c4068b0) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x7efefe82e5f0, count: -5
---
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