panic: Data modified on freelist: word 4 of object 0xffff8000015e6240 size 0x30 previous type ??? (0x0 != 0xdead4110)
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
489235 51228 32767 0x2010 0x4000000 1K syz-executor
*510821 31361 0 0x2 0 0 syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83484e16) at panic+0x1e5 sys/kern/subr_prf.c:198
malloc(30,7f,9) at malloc+0xdb6 sys/kern/kern_malloc.c:357
dopselect(ffff800045ffdc90,35,7d7bd83ef3f0,0,0,ffff80002a2494f0,b22f713db9ebe1db,ffff80002a249590) at dopselect+0xe4 sys/kern/sys_generic.c:619
sys_pselect(ffff800045ffdc90,ffff80002a249640,ffff80002a249590) at sys_pselect+0x25a sys/kern/sys_generic.c:593
syscall(ffff80002a249640) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a249640) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7d7bd83ef3a0, count: 8
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: Data modified on freelist: word 4 of object 0xffff8000015e6240 size 0x30 previous type ??? (0x0 != 0xdead4110)
ddb{0}> show kasan
No such command
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83484e16) at panic+0x1e5 sys/kern/subr_prf.c:198
malloc(30,7f,9) at malloc+0xdb6 sys/kern/kern_malloc.c:357
dopselect(ffff800045ffdc90,35,7d7bd83ef3f0,0,0,ffff80002a2494f0,b22f713db9ebe1db,ffff80002a249590) at dopselect+0xe4 sys/kern/sys_generic.c:619
sys_pselect(ffff800045ffdc90,ffff80002a249640,ffff80002a249590) at sys_pselect+0x25a sys/kern/sys_generic.c:593
syscall(ffff80002a249640) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a249640) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7d7bd83ef3a0, count: -7
ddb{0}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002a249010
rbx 0xffffffff839d4e0f cpu_info_full_primary+0x2e0f
rdx 0
rcx 0xffff800045ffdc90
rax 0xffffffff839d3ff0 cpu_info_full_primary+0x1ff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0x9913fc2d526a4d0f
r11 0x970232c2543c9753
r12 0xffffffff839d4c10 cpu_info_full_primary+0x2c10
r13 0
r14 0
r15 0x1
rip 0xffffffff823cd715 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80002a249000
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor) tid=510821 pid=31361 tcnt=1 stat=onproc
flags process=2<EXEC> proc=0
runpri=76, usrpri=86, slppri=36, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff800045ffca68,0xffff80002a22c2b8
process=0xffff800045ff1cf0 user=0xffff80002a244000, vmspace=0xfffff4800b1f73d0
estcpu=36, cpticks=46, pctcpu=0.27, user=2, sys=41, intr=3
ddb{0}> ps
PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND
51228 212839 43687 32767 4 0x2010 0x80000 syz-executor
51228 489235 43687 32767 7 0x2010 0x4000000 syz-executor
36971 204053 51934 32767 2 0x10 0 syz-executor
36971 208378 51934 32767 3 0x10 0x4000000 biowait syz-executor
89790 374128 31361 0 3 0 0 inode syz-executor
79643 249792 50020 32767 2 0x10 0 syz-executor
79643 54577 50020 32767 3 0x10 0x4000080 fsleep syz-executor
99388 255482 42685 32767 2 0x10 0 syz-executor
99388 515834 42685 32767 3 0x10 0x4000080 ttyin syz-executor
60989 376457 31361 0 3 0x2 0 biowait syz-executor
51934 209147 78066 32767 3 0x10 0x80 nanoslp syz-executor
78066 371726 31361 0 3 0x2 0x80 wait syz-executor
50020 314572 66463 32767 3 0x10 0x80 nanoslp syz-executor
43687 147007 97328 32767 3 0x10 0x80 nanoslp syz-executor
66463 116898 31361 0 3 0x2 0x80 wait syz-executor
97328 214580 31361 0 3 0x2 0x80 wait syz-executor
54733 362068 64611 32767 3 0x10 0x80 piperd syz-executor
64611 424009 31361 0 3 0x2 0x80 wait syz-executor
12978 148928 29564 32767 3 0x10 0x80 piperd syz-executor
29564 248089 31361 0 3 0x2 0x80 wait syz-executor
42685 238073 99041 32767 3 0x10 0x80 nanoslp syz-executor
99041 49955 31361 0 3 0x2 0x80 wait syz-executor
*31361 510821 25985 0 7 0x2 0 syz-executor
25985 169090 97115 0 3 0x100002 0x88 sigsusp ksh
97115 439981 62528 0 3 0x10 0x88 kqread sshd-session
62528 320297 59715 0 3 0x12 0x80 kqread sshd-session
22984 55611 1 0 3 0x100003 0x80 ttyin getty
59715 368299 1 0 3 0 0x88 kqread sshd
24183 297231 74829 73 3 0x1100010 0x80 kqread syslogd
74829 127409 1 0 3 0x100002 0x80 sbwait syslogd
17482 274578 1 0 3 0x100000 0x80 kqread resolvd
30247 147773 36825 77 3 0x100012 0x80 kqread dhcpleased
88581 68310 36825 77 3 0x100012 0x80 kqread dhcpleased
36825 455802 1 0 3 0 0x80 kqread dhcpleased
97889 94628 0 0 3 0x14000 0x200 bored smr
16141 370430 0 0 2 0x14000 0x200 zerothread
9659 441570 0 0 3 0x14000 0x200 aiodoned aiodoned
36885 509021 0 0 3 0x14000 0x200 syncer update
48215 370367 0 0 3 0x14000 0x200 cleaner cleaner
4996 465018 0 0 3 0x14000 0x200 reaper reaper
97246 33527 0 0 3 0x14000 0x200 pgdaemon pagedaemon
43692 201737 0 0 3 0x14000 0x200 bored viomb
24764 89180 0 0 3 0x14000 0x40000200 acpi0 acpi0
6774 456707 0 0 3 0x14000 0x40000200 idle1
12696 216652 0 0 3 0x14000 0x200 bored softnet1
99128 22587 0 0 3 0x14000 0x200 bored softnet0
32159 62695 0 0 3 0x14000 0x200 bored systqmp
38012 475839 0 0 3 0x14000 0x200 bored systq
37401 134494 0 0 3 0x14000 0x200 tmoslp softclockmp
61243 394413 0 0 3 0x14000 0x40000200 tmoslp softclock
48251 368194 0 0 3 0x14000 0x40000200 idle0
1 325179 0 0 3 0x2 0x80 wait init
0 0 -1 0 3 0x10000 0x200 scheduler swapper
ddb{0}> show all locks
CPU 0:
exclusive mutex /syzkaller/managers/setuid/kernel/sys/kern/kern_malloc.c:96 r = 0 (0xffffffff8393f658)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487
#2 malloc+0x2ef sys/kern/kern_malloc.c:200
#3 dopselect+0xe4 sys/kern/sys_generic.c:619
#4 sys_pselect+0x25a sys/kern/sys_generic.c:593
#5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
#6 Xsyscall+0x128
Process 51228 (syz-executor) thread 0xffff800045fe94e0 (489235)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a255c0)
#0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1
#2 sleep_finish+0x2d8 sys/kern/kern_synch.c:369
#3 msleep_nsec+0x132 sys/kern/kern_synch.c:219
#4 single_thread_set+0x1de sys/kern/kern_sig.c:2337
#5 sys_unveil+0x117 sys/kern/vfs_syscalls.c:983
#6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791
#7 Xsyscall+0x128
Process 36971 (syz-executor) thread 0xffff800045fe8d18 (208378)
exclusive rrwlock inode r = 0 (0xfffff480613e7ec0)
#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_write+0x419 sys/kern/kern_rwlock.c:320
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline]
#4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:150
#5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232
#6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393
#7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112
#8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394
#9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3063
#10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791
#11 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffff480613e7c70)
#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_write+0x419 sys/kern/kern_rwlock.c:320
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576
#5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431
#6 namei+0x7c5 sys/kern/vfs_lookup.c:250
#7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3048
#8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791
#9 Xsyscall+0x128
Process 60989 (syz-executor) thread 0xffff80002a2c1788 (376457)
exclusive rrwlock inode r = 0 (0xfffff480613e7d98)
#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_write+0x419 sys/kern/kern_rwlock.c:320
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline]
#4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:150
#5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232
#6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393
#7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112
#8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394
#9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3063
#10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791
#11 Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffff4807f0df578)
#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_write+0x419 sys/kern/kern_rwlock.c:320
#2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576
#5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431
#6 namei+0x7c5 sys/kern/vfs_lookup.c:250
#7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3048
#8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791
#9 Xsyscall+0x128
ddb{0}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11047 12014K 12034K 166960K 12183 0
pcb 17 12K 12K 166960K 17 0
rtable 195 5K 7K 166960K 748 0
pf 27 16K 16K 166960K 57 0
ifaddr 35 6K 7K 166960K 98 0
ifgroup 42 1K 2K 166960K 102 0
sysctl 2 1K 9K 166960K 7 0
counters 66 36K 37K 166960K 96 0
ioctlops 0 0K 4K 166960K 49 0
iov 0 0K 12K 166960K 9 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1287 81K 81K 166960K 1587 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 9 1K 1K 166960K 11 0
dirhash 12 2K 2K 166960K 24 0
ACPI 1692 195K 286K 166960K 12470 0
file desc 20 67K 129K 166960K 618 0
sigio 0 0K 0K 166960K 3 0
proc 58 115K 147K 166960K 892 0
subproc 54 3K 4K 166960K 297 0
NFS srvsock 1 0K 0K 166960K 1 0
NFS daemon 1 16K 16K 166960K 1 0
ip_moptions 0 0K 0K 166960K 42 0
in_multi 77 5K 6K 166960K 247 0
ether_multi 1 0K 0K 166960K 3 0
mrt 1 0K 0K 166960K 14 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 572 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 212 151K 187K 166960K 6322 0
UVM aobj 10 2K 2K 166960K 10 0
pinsyscall 41 82K 116K 166960K 2038 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 9 0K 2K 166960K 66 0
temp 30 9122K 9178K 166960K 5694 0
kqueue 13 20K 29K 166960K 59 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 71 0 67 1 0 1 1 0 8 0
rtentry 176 255 0 166 6 0 6 6 0 8 1
unpcb 144 244 0 229 4 0 4 4 0 8 3
syncache 336 6 0 6 1 0 1 1 0 8 1
tcpcb 736 90 0 86 1 0 1 1 0 8 0
arp 136 45 0 31 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 328 358 0 349 4 0 4 4 0 8 3
nd6 152 63 0 45 1 0 1 1 0 8 0
kcovpl 48 33 0 27 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 1034 0 667 32 0 32 32 0 8 7
art_table 40 1035 0 667 6 0 6 6 0 8 1
art_node 32 255 0 175 1 0 1 1 0 8 0
sysvmsgpl 40 3 0 2 1 0 1 1 0 8 0
semupl 112 1 0 1 1 0 1 1 0 8 1
semapl 72 8 0 1 1 0 1 1 0 8 0
shmpl 120 7 0 0 1 0 1 1 0 8 0
dirhash 1024 25 0 8 3 0 3 3 0 8 0
dino2pl 256 1909 0 392 95 0 95 95 0 8 0
ffsino 296 1909 0 392 117 0 117 117 0 8 0
nchpl 144 2402 0 652 65 0 65 65 0 8 0
vnodes 216 2215 0 0 124 0 124 124 0 8 0
namei 1024 9778 0 9772 3 2 1 2 0 8 0
percpumem 16 64 0 15 1 0 1 1 0 8 0
kstatmem 264 51 0 30 2 0 2 2 0 8 0
scxspl 216 8238 0 8236 4 3 1 3 1 8 0
plimitpl 152 128 0 105 2 0 2 2 0 8 0
sigapl 424 859 0 811 7 0 7 7 0 8 1
knotepl 120 293 0 0 9 0 9 9 0 8 0
kqueuepl 224 77 0 68 1 0 1 1 0 8 0
pipepl 344 223 0 196 4 0 4 4 0 8 0
fdescpl 528 843 0 811 4 0 4 4 0 8 1
filepl 160 3379 0 3188 12 0 12 12 0 8 0
lockfpl 104 48 0 46 1 0 1 1 0 8 0
lockfspl 48 20 0 18 1 0 1 1 0 8 0
sessionpl 144 131 0 117 1 0 1 1 0 8 0
pgrppl 48 172 0 150 1 0 1 1 0 8 0
ucredpl 104 431 0 414 1 0 1 1 0 8 0
zombiepl 144 811 0 811 1 0 1 1 0 8 1
processpl 1232 859 0 811 5 0 5 5 0 8 0
procpl 664 1222 0 1170 7 0 7 7 0 8 1
sosppl 176 2 0 2 1 0 1 1 0 8 1
sockpl 752 679 0 651 10 0 10 10 0 8 7
mcl64k 65536 4 0 0 1 0 1 1 0 8 0
mcl16k 16384 7 0 0 1 0 1 1 0 8 0
mcl12k 12288 1 0 0 1 0 1 1 0 8 0
mcl9k128 9344 1 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 2 0 0 1 0 1 1 0 8 0
mcl2k 2048 38 0 0 5 0 5 5 0 8 0
mextrefs 64 35 0 0 1 0 1 1 0 8 0
mtagpl 96 1 0 0 1 0 1 1 0 8 0
mbufpl 256 278 0 0 18 0 18 18 0 8 0
bufpl 272 2770 0 102 178 0 178 178 0 8 0
anonpl 32 7494 0 0 61 0 61 61 0 247 0
amapchunkpl 152 18021 0 17585 33 0 33 33 0 158 11
amappl16 200 2286 0 2273 15 7 8 14 0 8 7
amappl15 192 17 0 17 1 1 0 1 0 8 0
amappl14 184 557 0 556 1 0 1 1 0 8 0
amappl13 176 140 0 130 1 0 1 1 0 8 0
amappl12 168 1126 0 1096 2 0 2 2 0 8 0
amappl11 160 3 0 3 1 1 0 1 0 8 0
amappl10 152 62 0 52 1 0 1 1 0 8 0
amappl9 144 271 0 270 2 1 1 1 0 8 0
amappl8 136 144 0 143 1 0 1 1 0 8 0
amappl7 128 166 0 154 1 0 1 1 0 8 0
amappl6 120 280 0 278 1 0 1 1 0 8 0
amappl5 112 107 0 100 1 0 1 1 0 8 0
amappl4 104 300 0 285 1 0 1 1 0 8 0
amappl3 96 3175 0 3091 4 0 4 4 0 8 0
amappl2 88 925 0 852 3 0 3 3 0 8 1
amappl1 80 13204 0 12657 16 0 16 16 0 8 3
amappl 88 5375 0 5225 5 0 5 5 0 92 0
uvmvnodes 80 105 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 9 0 0 1 0 1 1 0 8 0
uaddrrnd 24 843 0 811 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 843 0 811 1 0 1 1 0 8 0
vmmpekpl 168 8584 0 8525 4 0 4 4 0 8 0
vmmpepl 168 62551 0 60750 106 0 106 106 0 357 17
vmsppl 488 842 0 811 7 2 5 6 0 8 0
rwobjpl 80 20283 0 19392 25 0 25 25 0 8 4
pdppl 4096 1693 0 1622 117 38 79 99 0 8 8
pvpl 32 15135 0 0 123 0 123 123 0 265 0
pmappl 256 842 0 811 4 1 3 3 0 8 0
extentpl 40 45 0 27 1 0 1 1 0 8 0
phpool 112 480 0 43 13 0 13 13 0 8 0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff83484e16) at panic+0x1e5 sys/kern/subr_prf.c:198
malloc(30,7f,9) at malloc+0xdb6 sys/kern/kern_malloc.c:357
dopselect(ffff800045ffdc90,35,7d7bd83ef3f0,0,0,ffff80002a2494f0,b22f713db9ebe1db,ffff80002a249590) at dopselect+0xe4 sys/kern/sys_generic.c:619
sys_pselect(ffff800045ffdc90,ffff80002a249640,ffff80002a249590) at sys_pselect+0x25a sys/kern/sys_generic.c:593
syscall(ffff80002a249640) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a249640) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7d7bd83ef3a0, count: -7
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
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x4f sys/dev/kcov.c:159
malloc(3400,29,9) at malloc+0x631 sys/kern/kern_malloc.c:254
unveil_add(ffff800045fe94e0,ffff80002a2d2de8,ffff80002a2d2ea3) at unveil_add+0x173 sys/kern/kern_unveil.c:410
sys_unveil(ffff800045fe94e0,ffff80002a2d2fd0,ffff80002a2d2f20) at sys_unveil+0x61c sys/kern/vfs_syscalls.c:1034
syscall(ffff80002a2d2fd0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a2d2fd0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x1ca7980a50, count: 6
ddb{1}> trace
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
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x4f sys/dev/kcov.c:159
malloc(3400,29,9) at malloc+0x631 sys/kern/kern_malloc.c:254
unveil_add(ffff800045fe94e0,ffff80002a2d2de8,ffff80002a2d2ea3) at unveil_add+0x173 sys/kern/kern_unveil.c:410
sys_unveil(ffff800045fe94e0,ffff80002a2d2fd0,ffff80002a2d2f20) at sys_unveil+0x61c sys/kern/vfs_syscalls.c:1034
syscall(ffff80002a2d2fd0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a2d2fd0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x1ca7980a50, count: -9