uvm_fault(0xffffffff839de430, 0xffff800001665000, 0, 2) -> e
kernel: page fault trap, code=2
Stopped at sys_shmat+0xe0: movl $0xffffffffffffffff,0(%r14)
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*503683 79392 0 0 0x4000000 1K syz-executor
195689 85700 0 0 0x1 0 syz-executor
sys_shmat(ffff800038bbed20,ffff80003c4e9ed0,ffff80003c4e9e20) at sys_shmat+0xe0 sys/kern/sysv_shm.c:235
syscall(ffff80003c4e9ed0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c4e9ed0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x34fb789e300, count: 12
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(0xffffffff839de430, 0xffff800001665000, 0, 2) -> e
ddb{1}> trace
sys_shmat(ffff800038bbed20,ffff80003c4e9ed0,ffff80003c4e9e20) at sys_shmat+0xe0 sys/kern/sysv_shm.c:235
syscall(ffff80003c4e9ed0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c4e9ed0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x34fb789e300, count: -3
ddb{1}> show registers
rdi 0
rsi 0x3e92675a
rbp 0xffff80003c4e9df0
rbx 0xffff80003c4e9ed0
rdx 0
rcx 0xffff800038bbed20
rax 0xffff8000299bdff0
r8 0
r9 0x1
r10 0
r11 0x92e9068b0ae933bb
r12 0xffff800038bbed20
r13 0xffff8000015f4000
r14 0xffff800001665000
r15 0x7100 __ALIGN_SIZE+0x6100
rip 0xffffffff815268e0 sys_shmat+0xe0
cs 0x8
rflags 0x10216 __ALIGN_SIZE+0xf216
rsp 0xffff80003c4e9d60
ss 0x10
sys_shmat+0xe0: movl $0xffffffffffffffff,0(%r14)
ddb{1}> show proc
PROC (syz-executor) tid=503683 pid=79392 tcnt=3 stat=onproc
flags process=0 proc=4000000<THREAD>
runpri=80, usrpri=80, slppri=32, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff80002a3262c8,0xffff80002a332d40
process=0xffff8000fffe09d0 user=0xffff80003c4e4000, vmspace=0xfffffd80697935e0
estcpu=30, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
43731 485826 77950 0 2 0 syz-executor
43731 272299 77950 0 3 0x4000080 fsleep syz-executor
79392 511596 60348 0 2 0 syz-executor
79392 132790 60348 0 3 0x4000080 fsleep syz-executor
*79392 503683 60348 0 7 0x4000000 syz-executor
59053 246276 55651 0 2 0 syz-executor
59053 209238 55651 0 2 0x4000000 syz-executor
59053 512346 55651 0 3 0x4000080 fsleep syz-executor
59053 387765 55651 0 2 0x4000000 syz-executor
74437 329560 0 0 3 0x14200 acct acct
40589 444956 73473 0 2 0 syz-executor
40589 61448 73473 0 3 0x4000080 ttyopn syz-executor
40589 368753 73473 0 3 0x4000080 fsleep syz-executor
40589 480203 73473 0 2 0x4000000 syz-executor
85700 195689 19769 0 7 0x1 syz-executor
85700 296570 19769 0 3 0x4000080 fsleep syz-executor
85700 169008 19769 0 2 0x4000000 syz-executor
48905 392875 64587 0 3 0 vmmaplk syz-executor
48905 210055 64587 0 3 0x4000000 vmmaplk syz-executor
48905 230374 64587 0 3 0x4000000 inode syz-executor
48905 48716 64587 0 3 0x4000000 inode syz-executor
48905 504995 64587 0 2 0x4000000 syz-executor
48905 485329 64587 0 3 0x4000000 vmmaplk syz-executor
77950 314359 21582 0 3 0x82 nanoslp syz-executor
19769 237157 21582 0 3 0x82 nanoslp syz-executor
4258 8250 0 0 3 0x14280 nfsidl nfsio
72347 230144 0 0 3 0x14280 nfsidl nfsio
59371 462009 0 0 3 0x14280 nfsidl nfsio
75889 237860 0 0 3 0x14280 nfsidl nfsio
78369 60669 0 0 3 0x14280 nfsidl nfsio
14038 371511 0 0 3 0x14280 nfsidl nfsio
89610 249934 0 0 3 0x14280 nfsidl nfsio
15161 191253 0 0 3 0x14280 nfsidl nfsio
21278 155542 0 0 3 0x14280 nfsidl nfsio
62498 468046 0 0 3 0x14280 nfsidl nfsio
69405 153732 0 0 3 0x14280 nfsidl nfsio
47653 363568 0 0 3 0x14280 nfsidl nfsio
75739 506859 0 0 3 0x14280 nfsidl nfsio
45345 40475 0 0 3 0x14280 nfsidl nfsio
39675 472497 0 0 3 0x14280 nfsidl nfsio
99995 412887 0 0 3 0x14280 nfsidl nfsio
95860 312570 0 0 3 0x14280 nfsidl nfsio
78446 372013 0 0 3 0x14280 nfsidl nfsio
60407 100518 0 0 3 0x14280 nfsidl nfsio
41082 296812 0 0 3 0x14280 nfsidl nfsio
66816 504252 1 0 3 0x100083 ttyopn getty
62679 166898 21582 0 3 0x82 nanoslp syz-executor
23 456478 21582 0 3 0x82 wait syz-executor
73473 467126 21582 0 3 0x82 nanoslp syz-executor
64587 154997 21582 0 3 0x82 nanoslp syz-executor
55651 449905 21582 0 3 0x82 nanoslp syz-executor
60348 314168 21582 0 3 0x82 nanoslp syz-executor
21582 126651 14265 0 3 0x82 kqread syz-executor
14265 103274 74405 0 3 0x10008a sigsusp ksh
74405 179685 80950 0 3 0x98 kqread sshd-session
80950 318183 35751 0 3 0x92 kqread sshd-session
35751 488727 1 0 3 0x88 kqread sshd
49420 224181 92648 74 3 0x1100092 bpf pflogd
92648 311888 1 0 3 0x80 sbwait pflogd
91714 368709 9297 73 3 0x1100090 kqread syslogd
9297 403631 1 0 3 0x100082 sbwait syslogd
20312 447632 1 0 3 0x100080 kqread resolvd
57310 358640 12478 77 3 0x100092 kqread dhcpleased
58830 392768 12478 77 3 0x100092 kqread dhcpleased
12478 58624 1 0 3 0x80 kqread dhcpleased
5203 507606 0 0 3 0x14200 bored smr
65953 478973 0 0 2 0x14200 zerothread
961 84076 0 0 3 0x14200 aiodoned aiodoned
31060 413114 0 0 3 0x14200 syncer update
17861 61054 0 0 3 0x14200 cleaner cleaner
94786 479314 0 0 3 0x14200 reaper reaper
50488 199267 0 0 3 0x14200 pgdaemon pagedaemon
28426 281857 0 0 3 0x14200 bored viomb
4014 89942 0 0 3 0x40014200 acpi0 acpi0
18905 62874 0 0 3 0x40014200 idle1
45938 410643 0 0 3 0x14200 bored softnet1
25313 126117 0 0 3 0x14200 bored softnet0
84534 76330 0 0 3 0x14200 bored systqmp
99030 21035 0 0 3 0x14200 bored systq
89245 70366 0 0 3 0x14200 tmoslp softclockmp
37603 419368 0 0 3 0x40014200 tmoslp softclock
46614 519282 0 0 3 0x40014200 idle0
1 60412 0 0 3 0x82 wait init
0 0 -1 0 3 0x10010200 scheduler swapper
ddb{1}> show all locks
Process 79392 (syz-executor) thread 0xffff800038bbed20 (503683)
Process 59053 (syz-executor) thread 0xffff800038bbefb8 (209238)
Process 48905 (syz-executor) thread 0xffff800038bbe028 (210055)
Process 48905 (syz-executor) thread 0xffff80002a332568 (230374)
Process 48905 (syz-executor) thread 0xffff80002a332800 (504995)
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11091 12142K 14121K 166960K 14464 0
pcb 17 14K 20K 166960K 416 0
rtable 208 11K 11K 166960K 600 0
pf 43 19K 21K 166960K 238 0
ifaddr 40 7K 8K 166960K 145 0
ifgroup 60 2K 2K 166960K 263 0
sysctl 4 1K 9K 166960K 15 0
counters 78 37K 38K 166960K 308 0
ioctlops 0 0K 8K 166960K 1853 0
iov 0 0K 28K 166960K 98 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1542 97K 97K 166960K 2809 0
UFS quota 1 32K 32K 166960K 1 0
UFS mount 5 36K 36K 166960K 5 0
shm 3 5K 5K 166960K 14 0
VM map 2 1K 1K 166960K 2 0
sem 12 0K 0K 166960K 64 0
dirhash 12 2K 2K 166960K 27 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 18 65K 236K 166960K 1484 0
sigio 1 0K 0K 166960K 33 0
proc 73 115K 164K 166960K 801 0
subproc 72 4K 4K 166960K 99 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 207 0
in_multi 76 5K 7K 166960K 185 0
ether_multi 1 0K 0K 166960K 13 0
mrt 1 0K 0K 166960K 38 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 115 519K 519K 166960K 115 0
exec 0 0K 1K 166960K 609 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 266 160K 185K 166960K 15204 0
UVM aobj 56 20K 22K 166960K 59 0
pinsyscall 43 86K 101K 166960K 2813 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 1K 166960K 99 0
NDP 15 0K 1K 166960K 112 0
temp 81 9084K 9153K 166960K 76558 0
kqueue 14 22K 33K 166960K 296 0
SYN cache 2 0K 16K 166960K 4 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 120 206 0 203 3 2 1 3 0 8 0
rtentry 176 172 0 94 6 0 6 6 0 8 0
unpcb 144 1144 0 1127 12 6 6 6 0 8 5
syncache 336 16 0 16 5 4 1 1 0 8 1
tcpqe 32 3 0 3 1 1 0 1 0 8 0
tcpcb 736 375 0 370 9 7 2 7 0 8 1
tcpcb: pool(0xffffffff839cd738:tcpcb): free list modified: page 0xffff800001646000; item ordinal 0; addr 0xffff800001647740 (p 0xfffffd806c6b2000); offset 0x0=0x9fb10d2fffffffff
pool(tcpcb): free list modified: page 0xffff800001646000; item ordinal 0; addr 0xffff800001647740 (p 0xfffffd806c6b2000); offset 0x0=0xffffffff
tcpcb: pool(0xffffffff839cd738:tcpcb): free list modified: page 0xffff800001646000; item ordinal 1; addr 0xffff800001646ea0 (p 0xfffffd806c6b2000); offset 0x0=0x9fb10d2fffffffff
pool(tcpcb): free list modified: page 0xffff800001646000; item ordinal 1; addr 0xffff800001646ea0 (p 0xfffffd806c6b2000); offset 0x0=0xffffffff
tcpcb: pool(0xffffffff839cd738:tcpcb): free list modified: page 0xffff800001646000; item ordinal 2; addr 0xffff800001646040 (p 0xfffffd806c6b2000); offset 0x0=0x9fb10d2fffffffff
pool(tcpcb): free list modified: page 0xffff800001646000; item ordinal 2; addr 0xffff800001646040 (p 0xfffffd806c6b2000); offset 0x0=0xffffffff
tcpcb: pool(0xffffffff839cd738:tcpcb): free list modified: page 0xffff800001646000; item ordinal 3; addr 0xffff800001646320 (p 0xfffffd806c6b2000); offset 0x0=0x9fb10d2fffffffff
pool(tcpcb): free list modified: page 0xffff800001646000; item ordinal 3; addr 0xffff800001646320 (p 0xfffffd806c6b2000); offset 0x0=0xffffffff
tcpcb: pool(0xffffffff839cd738:tcpcb): free list modified: page 0xffff800001646000; item ordinal 4; addr 0xffff800001646600 (p 0xfffffd806c6b2000); offset 0x0=0x9fb10d2fffffffff
pool(tcpcb): free list modified: page 0xffff800001646000; item ordinal 4; addr 0xffff800001646600 (p 0xfffffd806c6b2000); offset 0x0=0xffffffff
tcpcb: pool(0xffffffff839cd738:tcpcb): free list modified: page 0xffff800001646000; item ordinal 5; addr 0xffff8000016468e0 (p 0xfffffd806c6b2000); offset 0x0=0x9fb10d2fffffffff
pool(tcpcb): free list modified: page 0xffff800001646000; item ordinal 5; addr 0xffff8000016468e0 (p 0xfffffd806c6b2000); offset 0x0=0xffffffff
tcpcb: pool(0xffffffff839cd738:tcpcb): free list modified: page 0xffff800001646000; item ordinal 6; addr 0xffff800001646bc0 (p 0xfffffd806c6b2000); offset 0x0=0x9fb10d2fffffffff
pool(tcpcb): free list modified: page 0xffff800001646000; item ordinal 6; addr 0xffff800001646bc0 (p 0xfffffd806c6b2000); offset 0x0=0xffffffff
tcpcb: pool(0xffffffff839cd738:tcpcb): free list modified: page 0xffff800001646000; item ordinal 7; addr 0xffff800001647180 (p 0xfffffd806c6b2000); offset 0x0=0x9fb10d2fffffffff
pool(tcpcb): free list modified: page 0xffff800001646000; item ordinal 7; addr 0xffff800001647180 (p 0xfffffd806c6b2000); offset 0x0=0xffffffff
tcpcb: pool(0xffffffff839cd738:tcpcb): free list modified: page 0xffff800001646000; item ordinal 8; addr 0xffff800001647460 (p 0xfffffd806c6b2000); offset 0x0=0x9fb10d2fffffffff
pool(tcpcb): free list modified: page 0xffff800001646000; item ordinal 8; addr 0xffff800001647460 (p 0xfffffd806c6b2000); offset 0x0=0xffffffff
tcpcb: pool(0xffffffff839cd738:tcpcb): free list modified: page 0xffff800001646000; item ordinal 9; addr 0xffff800001647a20 (p 0xfffffd806c6b2000); offset 0x0=0x9fb10d2fffffffff
pool(tcpcb): free list modified: page 0xffff800001646000; item ordinal 9; addr 0xffff800001647a20 (p 0xfffffd806c6b2000); offset 0x0=0xffffffff
tcpcb: pool(0xffffffff839cd738:tcpcb): free list modified: page 0xffff800001646000; item ordinal 10; addr 0xffff800001647d00 (p 0xfffffd806c6b2000); offset 0x0=0x9fb10d2fffffffff
pool(tcpcb): free list modified: page 0xffff800001646000; item ordinal 10; addr 0xffff800001647d00 (p 0xfffffd806c6b2000); offset 0x0=0xffffffff
arp 136 27 0 12 1 0 1 1 0 8 0
inpcb 328 1625 0 1617 16 14 2 7 0 8 0
nd6 152 35 0 19 1 0 1 1 0 8 0
pkpcb 40 3 0 3 2 2 0 1 0 8 0
kcovpl 48 11 0 3 1 0 1 1 0 8 0
ppxss 1192 99 0 96 2 1 1 1 0 8 0
pppxif 1504 5 0 5 3 3 0 1 0 8 0
pfstscr 40 2 0 2 1 1 0 1 0 8 0
pffrag 232 16 0 5 1 0 1 1 0 482 0
pffrnode 88 16 0 5 1 0 1 1 0 8 0
pffrent 40 36 0 25 1 0 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 90 0 33 1 0 1 1 0 8 0
pfstkey 128 93 0 36 2 0 2 2 0 8 0
pfstate 448 91 0 35 7 0 7 7 0 8 0
pfrule 1360 24 0 19 2 1 1 2 0 8 0
rttmr 136 2 0 2 2 2 0 1 0 8 0
art_heap8 4096 3 0 0 3 0 3 3 0 8 0
art_heap4 256 758 0 409 31 8 23 29 0 8 0
art_table 40 761 0 409 5 0 5 5 0 8 0
art_node 32 169 0 99 1 0 1 1 0 8 0
sysvmsgpl 40 16 0 9 1 0 1 1 0 8 0
semupl 112 3 0 3 2 2 0 1 0 8 0
semapl 112 60 0 50 1 0 1 1 0 8 0
shmpl 112 47 0 2 2 0 2 2 0 8 0
dirhash 1024 27 0 10 3 0 3 3 0 8 0
dino2pl 256 4332 0 2865 93 0 93 93 0 8 0
ffsino 296 4332 0 2865 114 0 114 114 0 8 0
nchpl 144 6377 0 4662 64 0 64 64 0 8 0
rtmask 32 23 0 22 4 3 1 1 0 8 0
vnodes 216 5194 0 0 289 0 289 289 0 8 0
namei 1024 22792 0 22789 1 0 1 1 0 8 0
percpumem 16 169 0 115 1 0 1 1 0 8 0
vcpupl 3968 9 0 1 2 0 2 2 0 8 0
vmpool 848 9 0 1 1 0 1 1 0 8 0
kstatmem 264 182 0 148 4 1 3 3 0 8 0
scsiplug 72 11 0 11 2 2 0 1 0 8 0
scxspl 216 39129 0 39129 12 11 1 5 1 8 1
plimitpl 152 550 0 530 1 0 1 1 0 8 0
sigapl 424 1828 0 1759 9 1 8 8 0 8 0
knotepl 120 558 0 0 17 0 17 17 0 8 0
kqueuepl 224 534 0 523 4 2 2 3 0 8 1
pipepl 344 238 0 210 3 0 3 3 0 8 0
fdescpl 528 1787 0 1755 3 0 3 3 0 8 0
filepl 160 12360 0 12136 26 10 16 17 0 8 4
lockfpl 104 686 0 683 1 0 1 1 0 8 0
lockfspl 48 246 0 243 1 0 1 1 0 8 0
sessionpl 144 38 0 29 1 0 1 1 0 8 0
pgrppl 48 59 0 42 1 0 1 1 0 8 0
ucredpl 104 1837 0 1824 1 0 1 1 0 8 0
zombiepl 144 1875 0 1873 1 0 1 1 0 8 0
processpl 1232 1828 0 1759 7 1 6 6 0 8 0
procpl 664 4090 0 4005 8 0 8 8 0 8 0
sosppl 176 14 0 14 4 3 1 1 0 8 1
sockpl 752 3052 0 3024 42 30 12 17 0 8 8
sockpl: pool(0xffffffff839d08a0:sockpl): page inconsistency: page 0xffff8000ffffffff; at page head addr 0xffff80000160df90 (p 0xffff80000160c000)
uvm_fault(0xfffffd80697935e0, 0x10000004f, 0, 1) -> e
kernel: page fault trap, code=0
Faulted in DDB; continuing...
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff8389fff0) 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(ffffffff83a59900) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83a59900) at __mp_lock+0x192 sys/kern/kern_lock.c:173
softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83
dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862
Xsoftclock() at Xsoftclock+0x27
__mp_lock(ffffffff83a59900) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83a59900) at __mp_lock+0x192 sys/kern/kern_lock.c:173
ktrsysret(ffff80002a332fc8,ca,0,ffff80003c4bd4b0) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline]
ktrsysret(ffff80002a332fc8,ca,0,ffff80003c4bd4b0) at ktrsysret+0xde sys/kern/kern_ktrace.c:209
syscall(ffff80003c4bd560) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline]
syscall(ffff80003c4bd560) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7eb1c3e73e70, count: 4
ddb{0}> trace
x86_ipi_db(ffffffff8389fff0) 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(ffffffff83a59900) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83a59900) at __mp_lock+0x192 sys/kern/kern_lock.c:173
softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83
dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862
Xsoftclock() at Xsoftclock+0x27
__mp_lock(ffffffff83a59900) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83a59900) at __mp_lock+0x192 sys/kern/kern_lock.c:173
ktrsysret(ffff80002a332fc8,ca,0,ffff80003c4bd4b0) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline]
ktrsysret(ffff80002a332fc8,ca,0,ffff80003c4bd4b0) at ktrsysret+0xde sys/kern/kern_ktrace.c:209
syscall(ffff80003c4bd560) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline]
syscall(ffff80003c4bd560) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7eb1c3e73e70, count: -11
ddb{0}> machine ddbcpu 1
Stopped at sys_shmat+0xe0: movl $0xffffffffffffffff,0(%r14)
sys_shmat(ffff800038bbed20,ffff80003c4e9ed0,ffff80003c4e9e20) at sys_shmat+0xe0 sys/kern/sysv_shm.c:235
syscall(ffff80003c4e9ed0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c4e9ed0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x34fb789e300, count: 12
ddb{1}> trace
sys_shmat(ffff800038bbed20,ffff80003c4e9ed0,ffff80003c4e9e20) at sys_shmat+0xe0 sys/kern/sysv_shm.c:235
syscall(ffff80003c4e9ed0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c4e9ed0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x34fb789e300, count: -3