uvm_fault(0xfffff9806d09e7c8, 0x100000010, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at amap_lookups+0x1e0: movl 0x10(%r15),%r14d
TID PID UID PRFLAGS PFLAGS CPU COMMAND
* 93348 24691 32767 0x10 0 0 syz-executor
522590 90844 0 0x14000 0x200 1 reaper
amap_lookups(fffff9806cdb4298,1000,ffff80002a2ce2f0,8) at amap_lookups+0x1e0 amap_chunk_get sys/uvm/uvm_amap.c:118 [inline]
amap_lookups(fffff9806cdb4298,1000,ffff80002a2ce2f0,8) at amap_lookups+0x1e0 sys/uvm/uvm_amap.c:1168
uvm_fault_check(ffff80002a2ce3f0,ffff80002a2ce428,ffff80002a2ce460,0) at uvm_fault_check+0x8d2 sys/uvm/uvm_fault.c:840
uvm_fault(fffff9806d09e7c8,ea8e38b0000,0,1) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627
upageflttrap(ffff80002a2ce590,ea8e38b0f50) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80002a2ce590) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x718665ac72e0, 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(0xfffff9806d09e7c8, 0x100000010, 0, 1) -> e
ddb{0}> show kasan
No such command
ddb{0}> trace
amap_lookups(fffff9806cdb4298,1000,ffff80002a2ce2f0,8) at amap_lookups+0x1e0 amap_chunk_get sys/uvm/uvm_amap.c:118 [inline]
amap_lookups(fffff9806cdb4298,1000,ffff80002a2ce2f0,8) at amap_lookups+0x1e0 sys/uvm/uvm_amap.c:1168
uvm_fault_check(ffff80002a2ce3f0,ffff80002a2ce428,ffff80002a2ce460,0) at uvm_fault_check+0x8d2 sys/uvm/uvm_fault.c:840
uvm_fault(fffff9806d09e7c8,ea8e38b0000,0,1) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627
upageflttrap(ffff80002a2ce590,ea8e38b0f50) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80002a2ce590) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x718665ac72e0, count: -6
ddb{0}> show registers
rdi 0x11
rsi 0x20
rbp 0xffff80002a2ce240
rbx 0
rdx 0
rcx 0
rax 0xffff800000c43ea0
r8 0xffffffff81d97110 uvm_map_inentry_sp
r9 0
r10 0
r11 0x48af2429fdc34da8
r12 0x9
r13 0
r14 0x20
r15 0x100000000
rip 0xffffffff82e31e00 amap_lookups+0x1e0
cs 0x8
rflags 0x10206 __ALIGN_SIZE+0xf206
rsp 0xffff80002a2ce1b0
ss 0
amap_lookups+0x1e0: movl 0x10(%r15),%r14d
ddb{0}> show proc
PROC (syz-executor) tid=93348 pid=24691 tcnt=1 stat=onproc
flags process=10<SUGID> proc=0
runpri=60, usrpri=61, slppri=16, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff800045fe7248,0xffffffff83b42ca8
process=0xffff80003b3cd360 user=0xffff80002a2c9000, vmspace=0xfffff9806d09e7c8
estcpu=11, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0
ddb{0}> ps
PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND
*24691 93348 36523 32767 7 0x10 0 syz-executor
18940 486115 39508 32767 2 0x10 0 syz-executor
89374 279623 86333 32767 2 0x10 0 syz-executor
89374 191788 86333 32767 2 0x10 0x4000000 syz-executor
89864 109503 8599 32767 2 0x10 0 syz-executor
77741 173147 94542 0 2 0x2 0 syz-executor
13379 257276 22738 32767 3 0x10 0x80 piperd syz-executor
40452 80047 81417 32767 2 0x10 0xc80 syz-executor
70965 462216 3294 32767 3 0x10 0x80 piperd syz-executor
36523 497199 46202 32767 3 0x10 0x80 nanoslp syz-executor
39508 519284 10296 32767 2 0x10 0xc80 syz-executor
86333 490989 32485 32767 2 0x10 0xc80 syz-executor
8599 3749 5013 32767 3 0x10 0x80 nanoslp syz-executor
22738 496119 94542 0 3 0x2 0x80 wait syz-executor
46202 219744 94542 0 3 0x2 0x80 wait syz-executor
81417 4896 94542 0 3 0x2 0x80 wait syz-executor
3294 396710 94542 0 3 0x2 0x80 wait syz-executor
10296 482612 94542 0 3 0x2 0x80 wait syz-executor
32485 513052 94542 0 3 0x2 0x80 wait syz-executor
5013 498702 94542 0 3 0x2 0x80 wait syz-executor
94542 177084 17299 0 2 0x2 0 syz-executor
17299 393543 16847 0 3 0x100002 0x88 sigsusp ksh
16847 138347 70884 0 3 0x10 0x88 kqread sshd-session
70884 215354 2797 0 3 0x12 0x80 kqread sshd-session
33777 52268 1 0 3 0x100003 0x80 ttyin getty
2797 2308 1 0 3 0 0x88 kqread sshd
2035 420667 88037 73 3 0x1100010 0x80 kqread syslogd
88037 313724 1 0 3 0x100002 0x80 sbwait syslogd
59708 384832 1 0 3 0x100000 0x80 kqread resolvd
84972 172351 92054 77 3 0x100012 0x80 kqread dhcpleased
6232 510443 92054 77 3 0x100012 0x80 kqread dhcpleased
92054 495593 1 0 3 0 0x80 kqread dhcpleased
77306 104958 0 0 3 0x14000 0x200 bored smr
14436 455884 0 0 2 0x14000 0x200 zerothread
64853 459171 0 0 3 0x14000 0x200 aiodoned aiodoned
15663 436752 0 0 3 0x14000 0x200 syncer update
84641 327573 0 0 3 0x14000 0x200 cleaner cleaner
90844 522590 0 0 7 0x14000 0x200 reaper
77996 220733 0 0 3 0x14000 0x200 pgdaemon pagedaemon
73319 243276 0 0 3 0x14000 0x200 bored viomb
40229 400530 0 0 3 0x14000 0x40000200 acpi0 acpi0
29064 161909 0 0 3 0x14000 0x40000200 idle1
59220 191504 0 0 3 0x14000 0x200 bored softnet1
93383 304617 0 0 3 0x14000 0x200 bored softnet0
29886 297032 0 0 3 0x14000 0x200 bored systqmp
10586 411624 0 0 3 0x14000 0x200 bored systq
33080 307086 0 0 3 0x14000 0x200 tmoslp softclockmp
983 516703 0 0 3 0x14000 0x40000200 tmoslp softclock
60934 355623 0 0 3 0x14000 0x40000200 idle0
1 441923 0 0 3 0x2 0x80 wait init
0 0 -1 0 3 0x10000 0x200 scheduler swapper
ddb{0}> show all locks
Process 24691 (syz-executor) thread 0xffff800045fe6550 (93348)
shared rwlock amaplk r = 0 (0xfffff9806e0bde58)
#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 (0xfffff9806d09e8c8)
#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{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11049 12016K 12034K 166960K 12143 0
pcb 17 12K 12K 166960K 17 0
rtable 215 6K 7K 166960K 362 0
pf 29 16K 16K 166960K 31 0
ifaddr 38 6K 7K 166960K 44 0
ifgroup 46 2K 2K 166960K 50 0
sysctl 1 1K 9K 166960K 5 0
counters 68 36K 37K 166960K 70 0
ioctlops 0 0K 2K 166960K 33 0
iov 0 0K 8K 166960K 8 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1288 81K 81K 166960K 1467 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 2 1K 5K 166960K 5 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 86 0
dirhash 12 2K 2K 166960K 15 0
ACPI 1734 201K 291K 166960K 11964 0
file desc 21 77K 117K 166960K 394 0
proc 58 99K 147K 166960K 531 0
subproc 64 4K 4K 166960K 163 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 53 0
in_multi 88 6K 7K 166960K 106 0
ether_multi 1 0K 0K 166960K 2 0
mrt 0 0K 0K 166960K 14 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 73 334K 334K 166960K 73 0
exec 0 0K 1K 166960K 389 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 193 142K 151K 166960K 4848 0
UVM aobj 9 2K 2K 166960K 9 0
pinsyscall 42 84K 110K 166960K 1494 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 12 0
NDP 10 0K 2K 166960K 27 0
temp 35 9118K 9178K 166960K 4384 0
kqueue 13 20K 26K 166960K 62 0
SYN cache 2 16K 16K 166960K 2 0
ddb{0}> 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 85 0 82 2 0 2 2 0 8 1
rtentry 176 113 0 14 6 0 6 6 0 8 1
unpcb 144 163 0 148 1 0 1 1 0 8 0
syncache 336 4 0 4 1 1 0 1 0 8 0
tcpcb 736 156 0 152 7 0 7 7 0 8 6
arp 136 18 0 2 1 0 1 1 0 8 0
ipq 40 2 0 0 1 0 1 1 0 8 0
ipqe 40 2 0 0 1 0 1 1 0 8 0
inpcb 328 378 0 371 7 0 7 7 0 8 6
nd6 152 26 0 5 1 0 1 1 0 8 0
kcovpl 48 18 0 11 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 469 0 61 30 0 30 30 0 8 2
art_table 40 470 0 61 5 0 5 5 0 8 0
art_node 32 113 0 23 1 0 1 1 0 8 0
sysvmsgpl 40 4 0 3 1 0 1 1 0 8 0
semapl 72 84 0 74 1 0 1 1 0 8 0
shmpl 112 6 0 0 1 0 1 1 0 8 0
dirhash 1024 19 0 2 3 0 3 3 0 8 0
dino2pl 256 1869 0 392 93 0 93 93 0 8 0
ffsino 296 1869 0 392 114 0 114 114 0 8 0
nchpl 144 2352 0 652 64 0 64 64 0 8 0
vnodes 216 2041 0 0 114 0 114 114 0 8 0
namei 1024 7316 0 7316 1 0 1 1 0 8 1
percpumem 16 51 0 1 1 0 1 1 0 8 0
kstatmem 264 25 0 2 2 0 2 2 0 8 0
scxspl 216 7882 0 7882 4 3 1 3 1 8 1
plimitpl 152 77 0 54 2 0 2 2 0 8 1
sigapl 424 670 0 620 7 0 7 7 0 8 0
knotepl 120 319 0 0 10 0 10 10 0 8 0
kqueuepl 224 78 0 69 1 0 1 1 0 8 0
pipepl 344 237 0 210 9 0 9 9 0 8 6
fdescpl 528 654 0 621 3 0 3 3 0 8 0
filepl 160 3027 0 2833 14 0 14 14 0 8 5
lockfpl 104 84 0 82 1 0 1 1 0 8 0
lockfspl 48 22 0 20 1 0 1 1 0 8 0
sessionpl 144 46 0 31 1 0 1 1 0 8 0
pgrppl 48 68 0 45 1 0 1 1 0 8 0
ucredpl 104 404 0 386 1 0 1 1 0 8 0
zombiepl 144 621 0 620 1 0 1 1 0 8 0
processpl 1232 670 0 620 5 0 5 5 0 8 0
procpl 664 1031 0 980 7 0 7 7 0 8 2
sockpl 752 632 0 607 11 0 11 11 0 8 8
mcl64k 65536 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 4 0 0 1 0 1 1 0 8 0
mcl4k 4096 122 0 0 16 0 16 16 0 8 1
mcl2k 2048 20 0 0 3 0 3 3 0 8 0
mextrefs 64 16 0 0 1 0 1 1 0 8 0
mtagpl 96 1 0 0 1 0 1 1 0 8 0
mbufpl 256 249 0 0 16 0 16 16 0 8 0
bufpl 272 2610 0 102 168 0 168 168 0 8 0
anonpl 32 11447 0 0 93 0 93 93 0 247 0
amapchunkpl 152 14621 0 14239 27 0 27 27 0 158 9
amappl16 200 2429 0 2411 23 13 10 23 0 8 8
amappl15 192 10 0 10 1 1 0 1 0 8 0
amappl14 184 412 0 411 1 0 1 1 0 8 0
amappl13 176 117 0 107 1 0 1 1 0 8 0
amappl12 168 890 0 859 2 0 2 2 0 8 0
amappl11 160 4 0 4 1 1 0 1 0 8 0
amappl10 152 60 0 50 1 0 1 1 0 8 0
amappl9 144 285 0 285 1 1 0 1 0 8 0
amappl8 136 94 0 93 1 0 1 1 0 8 0
amappl7 128 143 0 132 1 0 1 1 0 8 0
amappl6 120 148 0 147 1 0 1 1 0 8 0
amappl5 112 97 0 90 1 0 1 1 0 8 0
amappl4 104 266 0 249 1 0 1 1 0 8 0
amappl3 96 2840 0 2746 5 1 4 4 0 8 0
amappl2 88 524 0 469 2 0 2 2 0 8 0
amappl1 80 11261 0 10697 14 0 14 14 0 8 0
amappl 88 4124 0 3993 5 0 5 5 0 92 0
uvmvnodes 80 101 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 8 0 0 1 0 1 1 0 8 0
uaddrrnd 24 654 0 621 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 654 0 621 1 0 1 1 0 8 0
vmmpekpl 168 7448 0 7405 3 0 3 3 0 8 0
vmmpepl 168 50225 0 48421 109 0 109 109 0 357 23
vmsppl 488 653 0 621 7 1 6 6 0 8 1
rwobjpl 80 17061 0 16168 28 0 28 28 0 8 6
pdppl 4096 1315 0 1242 109 30 79 93 0 8 6
pvpl 32 18251 0 0 148 0 148 148 0 265 0
pmappl 256 653 0 621 4 1 3 3 0 8 0
extentpl 40 46 0 28 1 0 1 1 0 8 0
phpool 112 457 0 34 13 0 13 13 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
amap_lookups(fffff9806cdb4298,1000,ffff80002a2ce2f0,8) at amap_lookups+0x1e0 amap_chunk_get sys/uvm/uvm_amap.c:118 [inline]
amap_lookups(fffff9806cdb4298,1000,ffff80002a2ce2f0,8) at amap_lookups+0x1e0 sys/uvm/uvm_amap.c:1168
uvm_fault_check(ffff80002a2ce3f0,ffff80002a2ce428,ffff80002a2ce460,0) at uvm_fault_check+0x8d2 sys/uvm/uvm_fault.c:840
uvm_fault(fffff9806d09e7c8,ea8e38b0000,0,1) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627
upageflttrap(ffff80002a2ce590,ea8e38b0f50) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192
usertrap(ffff80002a2ce590) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x718665ac72e0, count: -6
ddb{0}> machine ddbcpu 1
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffff80002999dff0) 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
__mp_lock(ffffffff83a3e980) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83a3e980) at __mp_lock+0x192 sys/kern/kern_lock.c:173
reaper(ffff800045ffd9f8) at reaper+0x211 sys/kern/kern_exit.c:507
end trace frame: 0x0, count: 10