witness: userret: returningwitness: thread 0xffff800020b39650 exiting with the following locks held:
with the following locks held:
exclusive rrwlock inodeexclusive rrwlock inode r = 0 (0xfffffd807e0a0b48)
r = 0 (0xfffffd807e0a0b48)
#0 #0 witness_lockwitness_lock+0x52e+0x52e
#1 #1 rw_enterrw_enter+0x46d+0x46d
#2 #2 rrw_enterrrw_enter+0x4f+0x4f
#3 #3 VOP_LOCKVOP_LOCK+0x4b+0x4b
#4 #4 vn_writevn_lock+0x169+0x6e
#5 #5 dofilewritevdovchflags+0x1ac+0x3f
#6 #6 sys_writesyscall+0x83+0x552
#7 #7 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline]Xsyscall
#7 #7 syscall+0x552 sys/arch/amd64/amd64/trap.c:554Xsyscall
+0x128#8
panic: witness_warXnsy
s
caStopped at db_enter+0x18: addq $0x8,%rsp
TID PID UID PRFLAGS PFLAGS CPU COMMAND
*248882 88081 32767 0x1010 0x4080000 1 syz-executor.1
180675 84227 0 0x14000 0x200 0 reaper
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:212
witness_warn(2,0,ffffffff81fac6a5) at witness_warn+0x69e witness_debugger sys/kern/subr_witness.c:2509 [inline]
witness_warn(2,0,ffffffff81fac6a5) at witness_warn+0x69e sys/kern/subr_witness.c:1454
userret(ffff800020b39160) at userret+0x36a sys/kern/kern_sig.c:1911
syscall(ffff800025065ef0) at syscall+0x44a mi_syscall_return sys/sys/syscall_mi.h:115 [inline]
syscall(ffff800025065ef0) at syscall+0x44a sys/arch/amd64/amd64/trap.c:576
Xsyscall(6,9,fffffffffffffedf,0,2,ab8cbb41280) at Xsyscall+0x128
end of kernel
end trace frame: 0xabb57ad88a0, 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{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
witness_warn
ddb{1}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x15c sys/kern/subr_prf.c:212
witness_warn(2,0,ffffffff81fac6a5) at witness_warn+0x69e witness_debugger sys/kern/subr_witness.c:2509 [inline]
witness_warn(2,0,ffffffff81fac6a5) at witness_warn+0x69e sys/kern/subr_witness.c:1454
userret(ffff800020b39160) at userret+0x36a sys/kern/kern_sig.c:1911
syscall(ffff800025065ef0) at syscall+0x44a mi_syscall_return sys/sys/syscall_mi.h:115 [inline]
syscall(ffff800025065ef0) at syscall+0x44a sys/arch/amd64/amd64/trap.c:576
Xsyscall(6,9,fffffffffffffedf,0,2,ab8cbb41280) at Xsyscall+0x128
end of kernel
end trace frame: 0xabb57ad88a0, count: -6
ddb{1}> show registers
rdi 0
rsi 0x3ffff acpi_pdirpa+0x2be67
rbp 0xffff800025065c30
rbx 0xffff800025065ce0
rdx 0x40000 acpi_pdirpa+0x2be68
rcx 0xffff800023406000
rax 0xffff8000009eeb00
r8 0xffffffff81957ee3 kprintf+0x173
r9 0x1
r10 0x25
r11 0xd4ef582b52890f08
r12 0x3000000008
r13 0xffff800025065c40
r14 0x100
r15 0x1
rip 0xffffffff8129bf48 db_enter+0x18
cs 0x8
rflags 0x246
rsp 0xffff800025065c20
ss 0x10
db_enter+0x18: addq $0x8,%rsp
ddb{1}> show proc
PROC (syz-executor.1) pid=248882 stat=onproc
flags process=1010<SUGID,SINGLEEXIT> proc=4080000<SUSPSINGLE,THREAD>
pri=32, usrpri=82, nice=20
forw=0xffffffffffffffff, list=0xffff800020b38780,0xffffffff82368ea8
process=0xffff800020b8ca80 user=0xffff800025060000, vmspace=0xfffffd807effe450
estcpu=32, cpticks=7, pctcpu=0.0
user=0, sys=6, intr=0
ddb{1}> ps
PID TID PPID UID S FLAGS WAIT COMMAND
88081 38780 38984 32767 3 0x3010 suspend syz-executor.1
88081 196109 38984 32767 2 0x4081010 syz-executor.1
*88081 248882 38984 32767 7 0x4081010 syz-executor.1
38984 419751 83502 32767 2 0x490 syz-executor.1
83502 25399 64252 0 3 0x82 wait syz-executor.1
78615 481447 36787 32767 2 0x490 syz-executor.0
36787 4804 64252 0 3 0x82 wait syz-executor.0
1252 476307 0 0 3 0x14200 bored sosplice
64252 433639 16243 0 3 0x82 thrsleep syz-fuzzer
64252 512120 16243 0 3 0x4000082 thrsleep syz-fuzzer
64252 247532 16243 0 3 0x4000082 thrsleep syz-fuzzer
64252 889 16243 0 3 0x4000082 thrsleep syz-fuzzer
64252 413278 16243 0 3 0x4000082 thrsleep syz-fuzzer
64252 29699 16243 0 3 0x4000082 thrsleep syz-fuzzer
64252 429670 16243 0 3 0x4000082 kqread syz-fuzzer
64252 428774 16243 0 3 0x4000082 thrsleep syz-fuzzer
64252 85347 16243 0 3 0x4000082 thrsleep syz-fuzzer
64252 340536 16243 0 3 0x4000082 thrsleep syz-fuzzer
16243 72815 90790 0 3 0x10008a pause ksh
90790 117775 51599 0 3 0x92 select sshd
54940 306473 1 0 2 0x100083 getty
51599 436585 1 0 3 0x80 select sshd
77303 447632 69678 73 2 0x100090 syslogd
69678 437648 1 0 3 0x100082 netio syslogd
49955 502171 1 77 3 0x100090 poll dhclient
88383 238836 1 0 3 0x80 poll dhclient
79485 202603 0 0 2 0x14200 zerothread
80841 207609 0 0 3 0x14200 aiodoned aiodoned
39085 140051 0 0 3 0x14200 syncer update
28869 370423 0 0 3 0x14200 cleaner cleaner
84227 180675 0 0 7 0x14200 reaper
20743 159803 0 0 3 0x14200 pgdaemon pagedaemon
78427 69144 0 0 3 0x14200 bored crynlk
6106 289227 0 0 3 0x14200 bored crypto
51303 264739 0 0 3 0x40014200 acpi0 acpi0
17721 419174 0 0 3 0x40014200 idle1
73072 29247 0 0 3 0x14200 bored softnet
49177 135103 0 0 3 0x14200 bored systqmp
58302 57405 0 0 3 0x14200 bored systq
51203 406447 0 0 2 0x40014200 softclock
85692 132612 0 0 3 0x40014200 idle0
89529 60044 0 0 3 0x14200 bored smr
1 464908 0 0 3 0x82 wait init
0 0 -1 0 3 0x10200 scheduler swapper
ddb{1}> show all locks
Process 88081 (syz-executor.1) thread 0xffff800020b39160 (248882)
exclusive rrwlock inode r = 0 (0xfffffd807e0a0b48)
#0 witness_lock+0x52e sys/kern/subr_witness.c:1163
#1 rw_enter+0x46d sys/kern/kern_rwlock.c:306
#2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435
#3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602
#4 vn_lock+0x6e sys/kern/vfs_vnops.c:549
#5 dovchflags+0x3f sys/kern/vfs_syscalls.c:2185
#6 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline]
#6 syscall+0x552 sys/arch/amd64/amd64/trap.c:554
#7 Xsyscall+0x128
ddb{1}> show malloc
Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim
devbuf 9460 6321K 6321K 78643K 12187 0 0
pcb 23 9K 11K 78643K 7880 0 0
rtable 105 3K 3K 78643K 14841 0 0
ifaddr 37 18K 21K 78643K 2016 0 0
counters 39 33K 33K 78643K 39 0 0
ioctlops 0 0K 2K 78643K 745 0 0
iov 0 0K 32K 78643K 1262 0 0
mount 1 1K 1K 78643K 1 0 0
vnodes 1215 76K 76K 78643K 9785 0 0
UFS quota 1 32K 32K 78643K 1 0 0
UFS mount 5 36K 36K 78643K 5 0 0
shm 2 1K 5K 78643K 197 0 0
VM map 2 1K 1K 78643K 2 0 0
sem 12 0K 0K 78643K 1361 0 0
dirhash 12 2K 2K 78643K 12 0 0
ACPI 1808 196K 290K 78643K 12765 0 0
file desc 7 21K 33K 78643K 32557 0 0
sigio 0 0K 0K 78643K 219 0 0
proc 41 38K 70K 78643K 15195 0 0
subproc 34 2K 2K 78643K 5610 0 0
NFS srvsock 1 0K 0K 78643K 1 0 0
NFS daemon 1 16K 16K 78643K 1 0 0
ip_moptions 0 0K 0K 78643K 2029 0 0
in_multi 33 2K 2K 78643K 4147 0 0
ether_multi 1 0K 0K 78643K 102 0 0
ISOFS mount 1 32K 32K 78643K 1 0 0
MSDOSFS mount 1 16K 16K 78643K 1 0 0
ttys 60 265K 265K 78643K 60 0 0
exec 0 0K 1K 78643K 35448 0 0
pagedep 1 8K 8K 78643K 1 0 0
inodedep 1 32K 32K 78643K 1 0 0
newblk 1 0K 0K 78643K 1 0 0
VM swap 7 26K 26K 78643K 7 0 0
UVM amap 134 23K 33K 78643K 120450 0 0
UVM aobj 130 4K 4K 78643K 162 0 0
memdesc 1 4K 4K 78643K 1 0 0
crypto data 1 1K 1K 78643K 1 0 0
ip6_options 0 0K 0K 78643K 953 0 0
NDP 5 0K 0K 78643K 993 0 0
temp 121 2738K 2834K 78643K 107561 0 0
kqueue 0 0K 0K 78643K 163 0 0
SYN cache 2 16K 16K 78643K 2 0 0
ddb{1}> show all pools
Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
arp 64 662 0 656 1 0 1 1 0 8 0
inpcbpl 280 8282 0 8275 1 0 1 1 0 8 0
plcache 128 20 0 0 1 0 1 1 0 8 0
rtentry 112 3653 0 3609 2 0 2 2 0 8 0
syncache 264 4 0 4 1 1 0 1 0 8 0
tcpqe 32 13 0 13 2 2 0 1 0 8 0
tcpcb 544 3155 0 3151 1 0 1 1 0 8 0
ipq 40 2 0 2 1 1 0 1 0 8 0
ipqe 40 4 0 4 1 1 0 1 0 8 0
nd6 48 990 0 984 1 0 1 1 0 8 0
art_heap8 4096 1 0 0 1 0 1 1 0 8 0
art_heap4 256 15688 0 15493 15 2 13 13 0 8 0
art_table 32 15689 0 15493 2 0 2 2 0 8 0
art_node 16 3652 0 3612 1 0 1 1 0 8 0
sysvmsgpl 40 40 0 24 1 0 1 1 0 8 0
semapl 112 1355 0 1345 1 0 1 1 0 8 0
shmpl 112 160 0 32 4 0 4 4 0 8 0
dirhash 1024 17 0 0 3 0 3 3 0 8 0
dino1pl 128 34466 0 32761 59 3 56 56 0 8 0
ffsino 272 34466 0 32761 123 9 114 114 0 8 0
nchpl 144 99828 0 98198 61 0 61 61 0 8 0
uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0
vnodes 200 5926 0 0 312 0 312 312 0 8 0
namei 1024 254181 0 254181 3 2 1 1 0 8 1
percpumem 16 30 0 0 1 0 1 1 0 8 0
scxspl 192 203842 0 203842 79 76 3 6 0 8 3
plimitpl 152 2413 0 2404 1 0 1 1 0 8 0
sigapl 432 31744 0 31729 5 3 2 3 0 8 0
futexpl 56 632570 0 632570 3 2 1 1 0 8 1
knotepl 112 10349 0 10330 1 0 1 1 0 8 0
kqueuepl 104 33873 0 33871 1 0 1 1 0 8 0
pipepl 112 11102 0 11083 35 34 1 2 0 8 0
fdescpl 488 31745 0 31729 3 0 3 3 0 8 0
filepl 152 145185 0 145084 49 44 5 7 0 8 1
lockfpl 104 3087 0 3087 54 53 1 1 0 8 1
lockfspl 48 1007 0 1007 54 53 1 1 0 8 1
sessionpl 112 345 0 335 1 0 1 1 0 8 0
pgrppl 48 503 0 493 1 0 1 1 0 8 0
ucredpl 96 29794 0 29785 1 0 1 1 0 8 0
zombiepl 144 31730 0 31728 4 3 1 1 0 8 0
processpl 896 31761 0 31728 4 0 4 4 0 8 0
procpl 632 106017 0 105972 23 18 5 5 0 8 1
srpgc 64 1968 0 1968 88 87 1 1 0 8 1
sosppl 128 252 0 252 70 69 1 1 0 8 1
sockpl 384 16497 0 16480 37 34 3 4 0 8 1
mcl64k 65536 14 0 0 2 0 2 2 0 8 0
mcl16k 16384 17 0 0 3 1 2 3 0 8 0
mcl12k 12288 57 0 0 2 0 2 2 0 8 0
mcl9k 9216 57 0 0 3 1 2 2 0 8 0
mcl8k 8192 18 0 0 3 1 2 3 0 8 0
mcl4k 4096 82 0 0 4 1 3 3 0 8 0
mcl2k2 2112 19 0 0 2 0 2 2 0 8 0
mcl2k 2048 167 0 0 17 4 13 17 0 8 0
mtagpl 80 1 0 0 1 0 1 1 0 8 0
mbufpl 256 1154 0 0 11 0 11 11 0 8 0
bufpl 256 48530 0 41505 440 0 440 440 0 8 0
anonpl 16 2767336 0 2760695 421 384 37 45 0 125 0
amapchunkpl 152 241518 0 241419 205 200 5 18 0 158 0
amappl16 192 121718 0 121377 623 604 19 30 0 8 1
amappl15 184 3238 0 3234 5 4 1 1 0 8 0
amappl14 176 5164 0 5157 1 0 1 1 0 8 0
amappl13 168 1891 0 1891 54 54 0 1 0 8 0
amappl12 160 1947 0 1941 1 0 1 1 0 8 0
amappl11 152 2753 0 2741 1 0 1 1 0 8 0
amappl10 144 17659 0 17656 3 2 1 1 0 8 0
amappl9 136 6624 0 6621 1 0 1 1 0 8 0
amappl8 128 5549 0 5486 4 1 3 3 0 8 0
amappl7 120 18122 0 18109 1 0 1 1 0 8 0
amappl6 112 1783 0 1769 1 0 1 1 0 8 0
amappl5 104 3870 0 3859 1 0 1 1 0 8 0
amappl4 96 30458 0 30431 1 0 1 1 0 8 0
amappl3 88 5097 0 5087 1 0 1 1 0 8 0
amappl2 80 229191 0 229115 4 1 3 3 0 8 0
amappl1 72 892343 0 891905 23 13 10 19 0 8 0
amappl 80 111380 0 111340 1 0 1 1 0 84 0
dma4096 4096 1 0 1 1 1 0 1 0 8 0
dma256 256 6 0 6 1 1 0 1 0 8 0
dma64 64 259 0 259 1 1 0 1 0 8 0
dma32 32 7 0 7 1 1 0 1 0 8 0
dma16 16 17 0 17 1 1 0 1 0 8 0
aobjpl 64 161 0 32 3 0 3 3 0 8 0
uaddrrnd 24 31745 0 31729 1 0 1 1 0 8 0
uaddrbest 32 2 0 0 1 0 1 1 0 8 0
uaddr 24 31745 0 31729 1 0 1 1 0 8 0
vmmpekpl 168 248166 0 248138 2 0 2 2 0 8 0
vmmpepl 168 4101981 0 4100385 499 421 78 94 0 357 0
vmsppl 368 31744 0 31729 2 0 2 2 0 8 0
pdppl 4096 63498 0 63458 7 1 6 6 0 8 1
pvpl 32 7617292 0 7607387 1103 1000 103 121 0 265 11
pmappl 232 31744 0 31729 7 6 1 2 0 8 0
extentpl 40 41 0 26 1 0 1 1 0 8 0
phpool 112 637 0 23 18 0 18 18 0 8 0