panic: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock
Stopped at db_enter+0x25: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
44215 57011 0 0x2 0x1 0 syz-executor
*349941 86840 0 0x2 0 1 syz-executor
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8355e0a6) at panic+0x1e5 sys/kern/subr_prf.c:198
witness_checkorder(ffffffff83af1440,9,0) at witness_checkorder+0x11ee sys/kern/subr_witness.c:847
__mp_lock(ffffffff83af0c40) at __mp_lock+0xe1 read_rflags sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:212 [inline]
__mp_lock(ffffffff83af0c40) at __mp_lock+0xe1 intr_disable sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:233 [inline]
__mp_lock(ffffffff83af0c40) at __mp_lock+0xe1 sys/kern/kern_lock.c:168
selwakeup(ffff800000c05ef8) at selwakeup+0x23 sys/kern/sys_generic.c:836
comstart(ffff800000c05e00) at comstart+0x28f sys/dev/ic/com.c:924
tputchar(44,ffff800000c05e00) at tputchar+0x17b ttstart sys/kern/tty.c:1369 [inline]
tputchar(44,ffff800000c05e00) at tputchar+0x17b sys/kern/tty.c:2303
kputchar(44,5,0) at kputchar+0x10e sys/kern/subr_prf.c:360
kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1
printf(ffffffff834b9e1f) at printf+0x8b sys/kern/subr_prf.c:529
malloc(10,7f,1) at malloc+0xa49 sys/kern/kern_malloc.c:309
dofilereadv(ffff800045ffd230,c,ffff80002a24e6f8,0,ffff80002a24e7b0) at dofilereadv+0x1f3 sys/kern/sys_generic.c:-1
sys_read(ffff800045ffd230,ffff80002a24e860,ffff80002a24e7b0) at sys_read+0xa2 sys/kern/sys_generic.c:172
syscall(ffff80002a24e860) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a24e860) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
end trace frame: 0xffff80002a24e8e0, count: 0
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: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock
ddb{1}> show kasan
No such command
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8355e0a6) at panic+0x1e5 sys/kern/subr_prf.c:198
witness_checkorder(ffffffff83af1440,9,0) at witness_checkorder+0x11ee sys/kern/subr_witness.c:847
__mp_lock(ffffffff83af0c40) at __mp_lock+0xe1 read_rflags sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:212 [inline]
__mp_lock(ffffffff83af0c40) at __mp_lock+0xe1 intr_disable sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:233 [inline]
__mp_lock(ffffffff83af0c40) at __mp_lock+0xe1 sys/kern/kern_lock.c:168
selwakeup(ffff800000c05ef8) at selwakeup+0x23 sys/kern/sys_generic.c:836
comstart(ffff800000c05e00) at comstart+0x28f sys/dev/ic/com.c:924
tputchar(44,ffff800000c05e00) at tputchar+0x17b ttstart sys/kern/tty.c:1369 [inline]
tputchar(44,ffff800000c05e00) at tputchar+0x17b sys/kern/tty.c:2303
kputchar(44,5,0) at kputchar+0x10e sys/kern/subr_prf.c:360
kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1
printf(ffffffff834b9e1f) at printf+0x8b sys/kern/subr_prf.c:529
malloc(10,7f,1) at malloc+0xa49 sys/kern/kern_malloc.c:309
dofilereadv(ffff800045ffd230,c,ffff80002a24e6f8,0,ffff80002a24e7b0) at dofilereadv+0x1f3 sys/kern/sys_generic.c:-1
sys_read(ffff800045ffd230,ffff80002a24e860,ffff80002a24e7b0) at sys_read+0xa2 sys/kern/sys_generic.c:172
syscall(ffff80002a24e860) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a24e860) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x73de81f99a50, count: -15
ddb{1}> show registers
rdi 0
rsi 0x1
rbp 0xffff80002a24dfd0
rbx 0xffff80002999ee07
rdx 0
rcx 0xffff800045ffd230
rax 0xffff80002999dff0
r8 0x101010101010101
r9 0x8080808080808080
r10 0xb7bed205193e7861
r11 0x9f96c29bcf7c2eb0
r12 0xffff80002999ec08
r13 0
r14 0
r15 0x1
rip 0xffffffff823aada5 db_enter+0x25
cs 0x8
rflags 0x246
rsp 0xffff80002a24dfc0
ss 0x10
db_enter+0x25: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor) tid=349941 pid=86840 tcnt=1 stat=onproc
flags process=2<EXEC> proc=0
runpri=50, usrpri=50, slppri=24, nice=20
wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
forw=0xffffffffffffffff, list=0xffff800045ffd9f8,0xffff800045ffcd10
process=0xffff800045ff2690 user=0xffff80002a249000, vmspace=0xfffff1806f0533e0
estcpu=0, cpticks=13, pctcpu=0.7, user=0, sys=13, intr=0
ddb{1}> ps
PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND
91146 82394 19243 0 2 0 0 syz-executor
61656 227530 53084 0 2 0x1000000 0 syz-executor
61656 206458 53084 0 3 0x1000000 0x4000080 ttyout syz-executor
61656 498454 53084 0 3 0x1000000 0x4000080 sbwait syz-executor
95432 339472 48179 0 2 0x10 0 syz-executor
95432 462993 48179 0 3 0x10 0x4000080 sbwait syz-executor
95432 21953 48179 0 3 0x10 0x4000080 sbufrcv syz-executor
93826 107 56156 0 3 0 0x80 nanoslp syz-executor
93826 400593 56156 0 3 0 0x4000000 physio syz-executor
93826 514356 56156 0 3 0 0x4000080 fsleep syz-executor
19243 170971 86840 0 3 0x2 0x80 nanoslp syz-executor
48179 97051 86840 0 3 0x2 0x80 nanoslp syz-executor
64084 472732 86840 0 2 0x2 0 syz-executor
4320 58994 86840 0 3 0x2 0x80 wait syz-executor
56156 397449 86840 0 3 0x2 0x80 nanoslp syz-executor
53084 61877 86840 0 3 0x2 0x80 nanoslp syz-executor
86697 303961 86840 0 3 0x2 0x80 nanoslp syz-executor
57011 44215 86840 0 7 0x2 0x1 syz-executor
*86840 349941 55850 0 7 0x2 0 syz-executor
55850 293166 25671 0 3 0x100002 0x88 sigsusp ksh
25671 473711 72063 0 3 0x10 0x88 kqread sshd-session
72063 372859 68576 0 3 0x12 0x80 kqread sshd-session
56438 410773 1 0 3 0x100003 0x80 ttyin getty
68576 370361 1 0 3 0 0x88 kqread sshd
8763 202143 59779 74 3 0x1100012 0x80 bpf pflogd
59779 26583 1 0 3 0 0x80 sbwait pflogd
50397 454859 87976 73 3 0x1100010 0x80 kqread syslogd
87976 436501 1 0 3 0x100002 0x80 sbwait syslogd
84965 337470 1 0 3 0x100000 0x80 kqread resolvd
56152 175797 93052 77 3 0x100012 0x80 kqread dhcpleased
54716 386017 93052 77 3 0x100012 0x80 kqread dhcpleased
93052 88995 1 0 3 0 0x80 kqread dhcpleased
50878 321136 0 0 3 0x14000 0x200 bored smr
77515 59350 0 0 2 0x14000 0x200 zerothread
39496 357559 0 0 3 0x14000 0x200 aiodoned aiodoned
22688 311365 0 0 3 0x14000 0x200 syncer update
10590 281113 0 0 3 0x14000 0x200 cleaner cleaner
18708 205387 0 0 3 0x14000 0x200 reaper reaper
81072 228720 0 0 3 0x14000 0x200 pgdaemon pagedaemon
50513 515581 0 0 3 0x14000 0x200 bored viomb
7348 337825 0 0 3 0x14000 0x40000200 acpi0 acpi0
1874 74037 0 0 3 0x14000 0x40000200 idle1
13723 334939 0 0 3 0x14000 0x200 bored softnet1
69353 257626 0 0 3 0x14000 0x200 bored softnet0
11428 191397 0 0 3 0x14000 0x200 bored systqmp
52305 283953 0 0 3 0x14000 0x200 bored systq
79619 511147 0 0 3 0x14000 0x200 tmoslp softclockmp
82997 301793 0 0 3 0x14000 0x40000200 tmoslp softclock
53721 318011 0 0 3 0x14000 0x40000200 idle0
1 296301 0 0 3 0x2 0x80 wait init
0 0 -1 0 3 0x10000 0x200 scheduler swapper
ddb{1}> show all locks
CPU 1:
exclusive mutex /syzkaller/managers/multicore/kernel/sys/kern/kern_malloc.c:96 r = 0 (0xffffffff839a4488)
#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 dofilereadv+0x1f3 sys/kern/sys_generic.c:-1
#4 sys_read+0xa2 sys/kern/sys_generic.c:172
#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 95432 (syz-executor) thread 0xffff80003c402d20 (462993)
exclusive rwlock sbufrcv r = 0 (0xffff800010fddb70)
#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 sblock+0xb6 sys/kern/uipc_socket2.c:536
#3 soreceive+0x27d sys/kern/uipc_socket.c:890
#4 recvit+0x40b sys/kern/uipc_syscalls.c:1078
#5 sys_recvmmsg+0x410 sys/kern/uipc_syscalls.c:969
#6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
#7 Xsyscall+0x128
Process 93826 (syz-executor) thread 0xffff80003c403a18 (400593)
shared rwlock vmmaplk r = 0 (0xfffff1806cd03aa8)
#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_vslock_device+0x149 sys/uvm/uvm_glue.c:173
#3 physio+0x257 sys/kern/kern_physio.c:139
#4 spec_write+0x11f sys/kern/spec_vnops.c:302
#5 VOP_WRITE+0x101 sys/kern/vfs_vops.c:245
#6 vn_write+0x1d3 sys/kern/vfs_vnops.c:414
#7 dofilewritev+0x2bd sys/kern/sys_generic.c:384
#8 sys_write+0xa2 sys/kern/sys_generic.c:300
#9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
#10 Xsyscall+0x128
Process 57011 (syz-executor) thread 0xffff800045ffcd00 (44215)
exclusive rrwlock inode r = 0 (0xfffff1806075d568)
#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 vget+0x2a2 sys/kern/vfs_subr.c:692
#6 ktrwriteraw+0x175 sys/kern/kern_ktrace.c:689
#7 ktrnamei+0x145 ktrwrite sys/kern/kern_ktrace.c:-1 [inline]
#7 ktrnamei+0x145 sys/kern/kern_ktrace.c:222
#8 namei+0x29e sys/kern/vfs_lookup.c:170
#9 vn_open+0x178 sys/kern/vfs_vnops.c:146
#10 doopenat+0x35b sys/kern/vfs_syscalls.c:1163
#11 sys_open+0x59 sys/kern/vfs_syscalls.c:1065
#12 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#12 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
#13 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff83af1440)
#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 pool_get+0x27e sys/kern/subr_pool.c:595
#3 namei+0xdf sys/kern/vfs_lookup.c:145
#4 vn_open+0x178 sys/kern/vfs_vnops.c:146
#5 doopenat+0x35b sys/kern/vfs_syscalls.c:1163
#6 sys_open+0x59 sys/kern/vfs_syscalls.c:1065
#7 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#7 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
#8 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim
devbuf 11055 12085K 12286K 166960K 12213 0
pcb 17 12K 12K 166960K 36 0
rtable 243 7K 7K 166960K 370 0
pf 34 17K 24K 166960K 66 0
ifaddr 43 7K 7K 166960K 47 0
ifgroup 55 2K 2K 166960K 62 0
sysctl 3 1K 9K 166960K 7 0
counters 70 37K 37K 166960K 74 0
ioctlops 0 0K 4K 166960K 1495 0
iov 1 4K 12K 166960K 3 0
mount 1 1K 1K 166960K 1 0
log 0 0K 0K 166960K 4 0
vnodes 1292 81K 81K 166960K 1430 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 7 0K 0K 166960K 8 0
dirhash 12 2K 2K 166960K 12 0
ACPI 1734 201K 291K 166960K 11964 0
file desc 16 57K 93K 166960K 201 0
sigio 0 0K 0K 166960K 2 0
proc 71 115K 164K 166960K 566 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 0 0K 0K 166960K 7 0
in_multi 99 6K 6K 166960K 99 0
ether_multi 1 0K 0K 166960K 1 0
mrt 0 0K 0K 166960K 7 0
ISOFS mount 1 32K 32K 166960K 1 0
MSDOSFS mount 1 16K 16K 166960K 1 0
ttys 55 254K 254K 166960K 55 0
exec 0 0K 1K 166960K 387 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 228 159K 172K 166960K 3617 0
UVM aobj 4 2K 2K 166960K 4 0
pinsyscall 41 82K 107K 166960K 1357 0
memdesc 1 4K 4K 166960K 1 0
crypto data 1 1K 1K 166960K 1 0
ip6_options 0 0K 0K 166960K 4 0
NDP 12 0K 1K 166960K 30 0
temp 35 9114K 9126K 166960K 7379 0
kqueue 14 22K 28K 166960K 41 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 44 0 41 1 0 1 1 0 8 0
rtentry 176 111 0 1 5 0 5 5 0 8 0
unpcb 144 68 0 47 1 0 1 1 0 8 0
syncache 336 5 0 5 2 1 1 1 0 8 1
tcpcb 736 32 0 27 1 0 1 1 0 8 0
arp 136 18 0 0 1 0 1 1 0 8 0
inpcb 328 125 0 116 3 1 2 2 0 8 0
nd6 152 24 0 0 1 0 1 1 0 8 0
kcovpl 48 8 0 0 1 0 1 1 0 8 0
ppxss 1192 1 0 1 1 1 0 1 0 8 0
pffrag 232 3 0 0 1 0 1 1 0 482 0
pffrnode 88 3 0 0 1 0 1 1 0 8 0
pffrent 40 3 0 0 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
pfsrclim 320 2 0 2 2 1 1 1 0 8 1
pfanchor 1288 5 0 0 1 0 1 1 0 8 0
pfstitem 24 26 0 0 1 0 1 1 0 8 0
pfstkey 128 26 0 0 1 0 1 1 0 8 0
pfstate 448 26 0 0 3 0 3 3 0 8 0
pfrule 1360 21 0 16 2 1 1 2 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 452 0 0 29 0 29 29 0 8 0
art_table 40 453 0 0 5 0 5 5 0 8 0
art_node 32 111 0 11 1 0 1 1 0 8 0
semapl 72 5 0 0 1 0 1 1 0 8 0
shmpl 112 1 0 0 1 0 1 1 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino2pl 256 1706 0 236 93 0 93 93 0 8 0
ffsino 296 1706 0 236 114 0 114 114 0 8 0
nchpl 144 2002 0 296 64 0 64 64 0 8 0
vnodes 216 1819 0 0 102 0 102 102 0 8 0
namei 1024 6147 0 6147 3 2 1 2 0 8 1
percpumem 16 53 0 2 1 0 1 1 0 8 0
kstatmem 264 31 0 4 2 0 2 2 0 8 0
scxspl 216 7206 0 7205 10 9 1 8 1 8 0
plimitpl 152 40 0 22 1 0 1 1 0 8 0
sigapl 424 518 0 472 7 1 6 7 0 8 0
knotepl 120 304 0 0 10 0 10 10 0 8 0
kqueuepl 224 40 0 30 1 0 1 1 0 8 0
pipepl 344 129 0 102 3 0 3 3 0 8 0
fdescpl 528 502 0 472 3 0 3 3 0 8 0
filepl 160 2027 0 1801 11 1 10 11 0 8 0
lockfpl 104 42 0 40 1 0 1 1 0 8 0
lockfspl 48 19 0 17 1 0 1 1 0 8 0
sessionpl 144 29 0 18 1 0 1 1 0 8 0
pgrppl 48 37 0 18 1 0 1 1 0 8 0
ucredpl 104 270 0 256 1 0 1 1 0 8 0
zombiepl 144 494 0 492 2 1 1 1 0 8 0
processpl 1232 518 0 472 5 1 4 5 0 8 0
procpl 664 629 0 577 6 0 6 6 0 8 1
sockpl 752 239 0 206 5 1 4 4 0 8 0
mcl64k 65536 2 0 0 1 0 1 1 0 8 0
mcl16k 16384 2 0 0 1 0 1 1 0 8 0
mcl8k 8192 2 0 0 1 0 1 1 0 8 0
mcl4k 4096 120 0 0 15 0 15 15 0 8 0
mcl2k 2048 17 0 0 3 0 3 3 0 8 0
mextrefs 64 22 0 0 1 0 1 1 0 8 0
mtagpl 96 3 0 0 1 0 1 1 0 8 0
mbufpl 256 138 0 0 9 0 9 9 0 8 0
bufpl 272 2427 0 105 155 0 155 155 0 8 0
anonpl 32 7429 0 0 60 0 60 60 0 247 0
amapchunkpl 152 10335 0 9852 32 10 22 30 0 158 1
amappl16 200 1858 0 1772 8 3 5 5 0 8 0
amappl15 192 8 0 8 1 1 0 1 0 8 0
amappl14 184 432 0 430 1 0 1 1 0 8 0
amappl13 176 167 0 155 1 0 1 1 0 8 0
amappl12 168 757 0 728 2 0 2 2 0 8 0
amappl11 160 6 0 6 1 1 0 1 0 8 0
amappl10 152 63 0 49 1 0 1 1 0 8 0
amappl9 144 281 0 280 1 0 1 1 0 8 0
amappl8 136 103 0 101 1 0 1 1 0 8 0
amappl7 128 147 0 134 1 0 1 1 0 8 0
amappl6 120 156 0 155 1 0 1 1 0 8 0
amappl5 112 93 0 83 1 0 1 1 0 8 0
amappl4 104 292 0 272 1 0 1 1 0 8 0
amappl3 96 1808 0 1712 3 0 3 3 0 8 0
amappl2 88 626 0 546 2 0 2 2 0 8 0
amappl1 80 10669 0 10062 15 1 14 15 0 8 0
amappl 88 2879 0 2721 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 3 0 0 1 0 1 1 0 8 0
uaddrrnd 24 502 0 472 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 502 0 472 1 0 1 1 0 8 0
vmmpekpl 168 6116 0 6081 2 0 2 2 0 8 0
vmmpepl 168 41399 0 39464 89 1 88 88 0 357 0
vmsppl 488 501 0 472 5 0 5 5 0 8 0
rwobjpl 80 15175 0 14078 24 1 23 24 0 8 0
pdppl 4096 1011 0 944 99 28 71 85 0 8 4
pvpl 32 15014 0 0 123 1 122 123 0 265 0
pmappl 256 501 0 472 3 0 3 3 0 8 0
extentpl 40 46 0 28 1 0 1 1 0 8 0
phpool 112 427 0 34 12 0 12 12 0 8 0
ddb{1}> machine ddbcpu 0
Stopped at x86_ipi_db+0x27: addq $0x8,%rsp
x86_ipi_db(ffffffff838dfff0) 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(ffffffff83af0c40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83af0c40) at __mp_lock+0x192 sys/kern/kern_lock.c:173
intr_handler(ffff80002a2a7e60,ffff8000002a2900) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560
Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f
__mp_lock(ffffffff83af0c40) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83af0c40) at __mp_lock+0x199 sys/kern/kern_lock.c:173
ktrsyscall(ffff800045ffcd00,35,10,ffff80002a2a8110) at ktrsyscall+0x2c7 ktrwrite sys/kern/kern_ktrace.c:-1 [inline]
ktrsyscall(ffff800045ffcd00,35,10,ffff80002a2a8110) at ktrsyscall+0x2c7 sys/kern/kern_ktrace.c:183
syscall(ffff80002a2a8110) at syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline]
syscall(ffff80002a2a8110) at syscall+0x305 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x74bb0131bb70, count: 5
ddb{0}> trace
x86_ipi_db(ffffffff838dfff0) 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(ffffffff83af0c40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83af0c40) at __mp_lock+0x192 sys/kern/kern_lock.c:173
intr_handler(ffff80002a2a7e60,ffff8000002a2900) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560
Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f
__mp_lock(ffffffff83af0c40) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83af0c40) at __mp_lock+0x199 sys/kern/kern_lock.c:173
ktrsyscall(ffff800045ffcd00,35,10,ffff80002a2a8110) at ktrsyscall+0x2c7 ktrwrite sys/kern/kern_ktrace.c:-1 [inline]
ktrsyscall(ffff800045ffcd00,35,10,ffff80002a2a8110) at ktrsyscall+0x2c7 sys/kern/kern_ktrace.c:183
syscall(ffff80002a2a8110) at syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline]
syscall(ffff80002a2a8110) at syscall+0x305 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x74bb0131bb70, count: -10
ddb{0}> machine ddbcpu 1
Stopped at db_enter+0x25: addq $0x8,%rsp
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8355e0a6) at panic+0x1e5 sys/kern/subr_prf.c:198
witness_checkorder(ffffffff83af1440,9,0) at witness_checkorder+0x11ee sys/kern/subr_witness.c:847
__mp_lock(ffffffff83af0c40) at __mp_lock+0xe1 read_rflags sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:212 [inline]
__mp_lock(ffffffff83af0c40) at __mp_lock+0xe1 intr_disable sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:233 [inline]
__mp_lock(ffffffff83af0c40) at __mp_lock+0xe1 sys/kern/kern_lock.c:168
selwakeup(ffff800000c05ef8) at selwakeup+0x23 sys/kern/sys_generic.c:836
comstart(ffff800000c05e00) at comstart+0x28f sys/dev/ic/com.c:924
tputchar(44,ffff800000c05e00) at tputchar+0x17b ttstart sys/kern/tty.c:1369 [inline]
tputchar(44,ffff800000c05e00) at tputchar+0x17b sys/kern/tty.c:2303
kputchar(44,5,0) at kputchar+0x10e sys/kern/subr_prf.c:360
kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1
printf(ffffffff834b9e1f) at printf+0x8b sys/kern/subr_prf.c:529
malloc(10,7f,1) at malloc+0xa49 sys/kern/kern_malloc.c:309
dofilereadv(ffff800045ffd230,c,ffff80002a24e6f8,0,ffff80002a24e7b0) at dofilereadv+0x1f3 sys/kern/sys_generic.c:-1
sys_read(ffff800045ffd230,ffff80002a24e860,ffff80002a24e7b0) at sys_read+0xa2 sys/kern/sys_generic.c:172
syscall(ffff80002a24e860) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a24e860) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
end trace frame: 0xffff80002a24e8e0, count: 0
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
panic(ffffffff8355e0a6) at panic+0x1e5 sys/kern/subr_prf.c:198
witness_checkorder(ffffffff83af1440,9,0) at witness_checkorder+0x11ee sys/kern/subr_witness.c:847
__mp_lock(ffffffff83af0c40) at __mp_lock+0xe1 read_rflags sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:212 [inline]
__mp_lock(ffffffff83af0c40) at __mp_lock+0xe1 intr_disable sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:233 [inline]
__mp_lock(ffffffff83af0c40) at __mp_lock+0xe1 sys/kern/kern_lock.c:168
selwakeup(ffff800000c05ef8) at selwakeup+0x23 sys/kern/sys_generic.c:836
comstart(ffff800000c05e00) at comstart+0x28f sys/dev/ic/com.c:924
tputchar(44,ffff800000c05e00) at tputchar+0x17b ttstart sys/kern/tty.c:1369 [inline]
tputchar(44,ffff800000c05e00) at tputchar+0x17b sys/kern/tty.c:2303
kputchar(44,5,0) at kputchar+0x10e sys/kern/subr_prf.c:360
kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1
printf(ffffffff834b9e1f) at printf+0x8b sys/kern/subr_prf.c:529
malloc(10,7f,1) at malloc+0xa49 sys/kern/kern_malloc.c:309
dofilereadv(ffff800045ffd230,c,ffff80002a24e6f8,0,ffff80002a24e7b0) at dofilereadv+0x1f3 sys/kern/sys_generic.c:-1
sys_read(ffff800045ffd230,ffff80002a24e860,ffff80002a24e7b0) at sys_read+0xa2 sys/kern/sys_generic.c:172
syscall(ffff80002a24e860) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a24e860) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x73de81f99a50, count: -15