login: witness: thread 0xffff800020b6f1a0 exiting with the following locks held: exclusive rrwlock inode r = 0 (0xfffffd806f7804d8) #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_rdwr+0x109 vn_lock sys/kern/vfs_vnops.c:561 [inline] #4 vn_rdwr+0x109 sys/kern/vfs_vnops.c:317 #5 acct_process+0x5db sys/kern/kern_acct.c:221 #6 exit1+0x361 sys/kern/kern_exit.c:208 #7 sys_exit+0x17 sys/kern/kern_exit.c:94 #8 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] #8 syscall+0x552 sys/arch/amd64/amd64/trap.c:555 #9 Xsyscall+0x128 panic: thread 0xffff800020b6f1a0 cannot exit while holding sleeplocks Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 5530 69789 0 0x2 0x480 0 syz-executor.1 *200518 89798 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 witness_thread_exit(ffff800020b6f1a0) at witness_thread_exit+0x213 sys/kern/subr_witness.c:1364 reaper(ffff800020affb30) at reaper+0x14c sys/kern/kern_exit.c:423 end trace frame: 0x0, count: 11 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 thread 0xffff800020b6f1a0 cannot exit while holding sleeplocks 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:207 witness_thread_exit(ffff800020b6f1a0) at witness_thread_exit+0x213 sys/kern/subr_witness.c:1364 reaper(ffff800020affb30) at reaper+0x14c sys/kern/kern_exit.c:423 end trace frame: 0x0, count: -4 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020afd100 rbx 0xffff800020afd1b0 rdx 0xffff800020affb30 rcx 0 rax 0 r8 0xffffffff817eab83 kprintf+0x173 r9 0x1 r10 0x25 r11 0x8ed4f1d8e8cd0e29 r12 0x3000000008 r13 0xffff800020afd110 r14 0x100 r15 0x1 rip 0xffffffff81ee4248 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020afd0f0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (reaper) pid=200518 stat=onproc flags process=14000 proc=200 pri=4, usrpri=54, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab1b28,0xffff800020aff8c8 process=0xffff800020aea008 user=0xffff800020af8000, vmspace=0xffffffff823b0ae0 estcpu=4, cpticks=13, pctcpu=0.52 user=0, sys=5, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 1312 280395 33934 0 3 0x82 nanosleep syz-executor.0 16358 344637 1 0 3 0x100083 ttyin getty 69789 5530 33934 0 7 0x482 syz-executor.1 19376 512710 0 0 3 0x14200 acct acct 93208 101980 0 0 3 0x14200 bored sosplice 33934 481014 42568 0 3 0x82 thrsleep syz-fuzzer 33934 45553 42568 0 3 0x4000082 thrsleep syz-fuzzer 33934 481505 42568 0 3 0x4000082 thrsleep syz-fuzzer 33934 514676 42568 0 3 0x4000082 thrsleep syz-fuzzer 33934 385402 42568 0 3 0x4000082 kqread syz-fuzzer 33934 66199 42568 0 3 0x4000082 thrsleep syz-fuzzer 33934 112717 42568 0 3 0x4000082 thrsleep syz-fuzzer 33934 379716 42568 0 3 0x4000082 thrsleep syz-fuzzer 33934 210556 42568 0 3 0x4000082 thrsleep syz-fuzzer 33934 356931 42568 0 3 0x4000082 thrsleep syz-fuzzer 42568 59765 51147 0 3 0x10008a pause ksh 51147 229175 81738 0 3 0x92 select sshd 81738 510005 1 0 3 0x80 select sshd 11813 306854 48656 74 3 0x100092 bpf pflogd 48656 110412 1 0 3 0x80 netio pflogd 19085 344434 46475 73 3 0x100010 ffs_fsync syslogd 46475 392383 1 0 3 0x100082 netio syslogd 74742 298220 1 77 3 0x100090 poll dhclient 53769 122184 1 0 3 0x80 poll dhclient 94571 91240 0 0 3 0x14200 pgzero zerothread 59181 4044 0 0 3 0x14200 aiodoned aiodoned 92727 233659 0 0 3 0x14200 syncer update 53866 417951 0 0 3 0x14200 cleaner cleaner *89798 200518 0 0 7 0x14200 reaper 4261 446789 0 0 3 0x14200 pgdaemon pagedaemon 44620 335597 0 0 3 0x14200 bored crynlk 85626 64668 0 0 3 0x14200 bored crypto 32098 360267 0 0 3 0x40014200 acpi0 acpi0 60594 364499 0 0 3 0x40014200 idle1 2822 22238 0 0 3 0x14200 bored softnet 85384 351172 0 0 3 0x14200 bored systqmp 25381 494685 0 0 3 0x14200 bored systq 67825 44308 0 0 3 0x40014200 bored softclock 56256 30238 0 0 3 0x40014200 idle0 19150 425890 0 0 2 0x40014200 smr 1 478199 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 19085 (syslogd) thread 0xffff800020b60ee0 (344434) exclusive rrwlock inode r = 0 (0xfffffd807eabbe68) #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:561 #5 sys_fsync+0x114 sys/kern/vfs_syscalls.c:2806 #6 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] #6 syscall+0x552 sys/arch/amd64/amd64/trap.c:555 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9623 6595K 7613K 78643K 42178 0 0 pcb 13 8K 8K 78643K 896 0 0 rtable 115 12K 13K 78643K 3942 0 0 ifaddr 87 23K 28K 78643K 1366 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 2154 0 0 iov 0 0K 28K 78643K 1319 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1192 75K 77K 78643K 12663 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 174 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 1376 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 4 9K 25K 78643K 12375 0 0 sigio 0 0K 0K 78643K 147 0 0 proc 54 51K 83K 78643K 3177 0 0 subproc 32 2K 2K 78643K 707 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 1034 0 0 in_multi 33 2K 2K 78643K 832 0 0 ether_multi 1 0K 0K 78643K 35 0 0 mrt 0 0K 0K 78643K 33 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 126 556K 556K 78643K 126 0 0 exec 0 0K 1K 78643K 1766 0 0 pfkey data 0 0K 0K 78643K 2 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 124 23K 32K 78643K 41639 0 0 UVM aobj 130 4K 4K 78643K 145 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 554 0 0 NDP 21 0K 1K 78643K 420 0 0 temp 235 2753K 3392K 78643K 171574 0 0 kqueue 0 0K 0K 78643K 125 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 88 0 82 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 575 0 573 1 0 1 1 0 8 0 rtentry 112 500 0 456 2 0 2 2 0 8 0 unpcb 120 3923 0 3913 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 9221 0 9221 2 2 0 2 0 8 0 tcpcb 544 1950 0 1946 1 0 1 1 0 8 0 inpcb 280 5780 0 5773 11 10 1 2 0 8 0 rttmr 72 3 0 3 3 3 0 1 0 8 0 ip6q 72 1 0 1 1 0 1 1 0 8 1 ip6af 48 2 0 2 1 0 1 1 0 8 1 nd6 48 123 0 117 1 0 1 1 0 8 0 pkpcb 40 78 0 78 22 22 0 1 0 8 0 swfcl 56 7 0 0 1 0 1 1 0 8 0 ppxss 1128 221 0 221 38 38 0 1 0 8 0 pffrag 232 20 0 20 13 13 0 1 0 482 0 pffrnode 88 20 0 20 13 13 0 1 0 8 0 pffrent 40 47 0 47 14 14 0 1 0 8 0 pfosfp 40 846 0 846 5 5 0 5 0 8 0 pfosfpen 112 1428 0 1428 21 21 0 21 0 8 0 pfstitem 24 298 0 278 1 0 1 1 0 8 0 pfstkey 112 298 0 278 1 0 1 1 0 8 0 pfstate 328 298 0 278 7 4 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 1999 0 1802 19 6 13 13 0 8 0 art_table 32 2000 0 1802 2 0 2 2 0 8 0 art_node 16 480 0 440 1 0 1 1 0 8 0 sysvmsgpl 40 28 0 19 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 1374 0 1364 1 0 1 1 0 8 0 shmpl 112 143 0 15 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 20326 0 18895 47 0 47 47 0 8 0 ffsino 272 20326 0 18895 96 0 96 96 0 8 0 nchpl 144 37675 0 36036 62 0 62 62 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 123813 0 123813 6 5 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scsiplug 64 34 0 34 19 19 0 1 0 8 0 scxspl 192 117148 0 117147 56 55 1 6 0 8 0 plimitpl 152 1048 0 1040 1 0 1 1 0 8 0 sigapl 432 12464 0 12450 4 2 2 3 0 8 0 futexpl 56 145552 0 145552 4 3 1 1 0 8 1 knotepl 112 2933 0 2914 1 0 1 1 0 8 0 kqueuepl 104 2663 0 2661 1 0 1 1 0 8 0 pipepl 112 6898 0 6879 11 10 1 2 0 8 0 fdescpl 488 12465 0 12450 3 0 3 3 0 8 0 filepl 152 73305 0 73206 20 15 5 7 0 8 0 lockfpl 104 4278 0 4278 8 7 1 1 0 8 1 lockfspl 48 1471 0 1471 8 7 1 1 0 8 1 sessionpl 112 63 0 52 1 0 1 1 0 8 0 pgrppl 48 202 0 191 1 0 1 1 0 8 0 ucredpl 96 14043 0 14033 1 0 1 1 0 8 0 zombiepl 144 12452 0 12450 7 6 1 1 0 8 0 processpl 896 12484 0 12450 5 1 4 5 0 8 0 procpl 632 38765 0 38721 12 7 5 5 0 8 0 srpgc 64 81 0 81 35 35 0 1 0 8 0 sosppl 128 165 0 165 39 39 0 1 0 8 0 sockpl 384 10459 0 10440 16 13 3 4 0 8 1 mcl64k 65536 951 0 0 113 105 8 66 0 8 3 mcl16k 16384 20 0 0 3 1 2 3 0 8 0 mcl12k 12288 49 0 0 2 0 2 2 0 8 0 mcl9k 9216 49 0 0 2 0 2 2 0 8 0 mcl8k 8192 26 0 0 3 0 3 3 0 8 0 mcl4k 4096 37 0 0 4 2 2 3 0 8 0 mcl2k2 2112 12 0 0 1 0 1 1 0 8 0 mcl2k 2048 243 0 0 25 14 11 25 0 8 0 mtagpl 80 80 0 0 1 0 1 1 0 8 0 mbufpl 256 1107 0 0 38 2 36 38 0 8 0 bufpl 256 35448 0 28419 440 0 440 440 0 8 0 anonpl 16 1135219 0 1124857 255 197 58 68 0 125 0 amapchunkpl 152 75847 0 75708 66 59 7 13 0 158 0 amappl16 192 60424 0 59757 345 310 35 46 0 8 1 amappl15 184 3573 0 3571 6 5 1 1 0 8 0 amappl14 176 3496 0 3489 1 0 1 1 0 8 0 amappl13 168 1904 0 1903 7 6 1 1 0 8 0 amappl12 160 1238 0 1236 1 0 1 1 0 8 0 amappl11 152 1685 0 1669 1 0 1 1 0 8 0 amappl10 144 1715 0 1710 1 0 1 1 0 8 0 amappl9 136 2606 0 2601 1 0 1 1 0 8 0 amappl8 128 2104 0 2067 2 0 2 2 0 8 0 amappl7 120 1727 0 1718 1 0 1 1 0 8 0 amappl6 112 1562 0 1555 1 0 1 1 0 8 0 amappl5 104 1689 0 1675 1 0 1 1 0 8 0 amappl4 96 12077 0 12044 2 1 1 2 0 8 0 amappl3 88 4571 0 4557 1 0 1 1 0 8 0 amappl2 80 98779 0 98699 3 1 2 3 0 8 0 amappl1 72 278655 0 278213 25 15 10 19 0 8 0 amappl 80 39732 0 39684 2 0 2 2 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 64 144 0 15 3 0 3 3 0 8 0 uaddrrnd 24 12465 0 12448 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 12465 0 12448 1 0 1 1 0 8 0 vmmpekpl 168 91590 0 91555 2 0 2 2 0 8 0 vmmpepl 168 1520053 0 1518138 520 416 104 117 0 357 18 vmsppl 368 12464 0 12448 2 0 2 2 0 8 0 pdppl 4096 24937 0 24896 8 2 6 6 0 8 0 pvpl 32 3058041 0 3044298 583 439 144 169 0 265 5 pmappl 232 12464 0 12448 4 3 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 766 0 140 20 0 20 20 0 8 0