świtness: thread 0xffff800020b5e020 exiting with the following locks held: exclusive rrwlock inode r = 0 (0xfffffd806ef76d60) #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 0xffff800020b5e020 cannot exit while holding sleeplocks Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 397048 51223 73 0x100010 0 0 syslogd *200087 79823 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(ffff800020b5e020) at witness_thread_exit+0x213 sys/kern/subr_witness.c:1364 reaper(ffff800020aff150) 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 0xffff800020b5e020 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(ffff800020b5e020) at witness_thread_exit+0x213 sys/kern/subr_witness.c:1364 reaper(ffff800020aff150) at reaper+0x14c sys/kern/kern_exit.c:423 end trace frame: 0x0, count: -4 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020afdba0 rbx 0xffff800020afdc50 rdx 0xffff800020aff150 rcx 0 rax 0 r8 0xffffffff81c91603 kprintf+0x173 r9 0x1 r10 0x25 r11 0x53d5bc5ed85bdf5f r12 0x3000000008 r13 0xffff800020afdbb0 r14 0x100 r15 0x1 rip 0xffffffff81166418 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020afdb90 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (reaper) pid=200087 stat=onproc flags process=14000 proc=200 pri=4, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab1638,0xffff800020afeee8 process=0xffff800020aea008 user=0xffff800020af8000, vmspace=0xffffffff82365e48 estcpu=1, cpticks=6, pctcpu=0.61 user=0, sys=5, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 51692 93223 67984 0 3 0x82 nanosleep syz-executor.1 66570 356888 0 0 3 0x14200 acct acct 91639 290673 67984 0 3 0x82 nanosleep syz-executor.0 73939 307192 1 0 3 0x100083 ttyin getty 16492 81709 0 0 3 0x14200 bored sosplice 67984 432866 29070 0 3 0x82 thrsleep syz-fuzzer 67984 247503 29070 0 3 0x4000082 thrsleep syz-fuzzer 67984 480260 29070 0 3 0x4000082 thrsleep syz-fuzzer 67984 445568 29070 0 3 0x4000082 thrsleep syz-fuzzer 67984 426675 29070 0 3 0x4000082 thrsleep syz-fuzzer 67984 141525 29070 0 3 0x4000082 thrsleep syz-fuzzer 67984 423924 29070 0 3 0x4000082 thrsleep syz-fuzzer 67984 321177 29070 0 3 0x4000082 thrsleep syz-fuzzer 67984 304650 29070 0 3 0x4000082 thrsleep syz-fuzzer 67984 335060 29070 0 3 0x4000082 kqread syz-fuzzer 29070 243114 29866 0 3 0x10008a pause ksh 29866 286419 98926 0 3 0x92 select sshd 98926 107047 1 0 3 0x80 select sshd 5860 365645 19846 74 3 0x100092 bpf pflogd 19846 237798 1 0 3 0x80 netio pflogd 51223 397048 11237 73 7 0x100010 syslogd 11237 381891 1 0 3 0x100082 netio syslogd 73755 324980 1 77 3 0x100090 poll dhclient 59725 5443 1 0 3 0x80 poll dhclient 20976 249037 0 0 3 0x14200 pgzero zerothread 5575 323292 0 0 3 0x14200 aiodoned aiodoned 59685 257557 0 0 3 0x14200 syncer update 99932 220402 0 0 3 0x14200 cleaner cleaner *79823 200087 0 0 7 0x14200 reaper 27914 506226 0 0 3 0x14200 pgdaemon pagedaemon 55342 438512 0 0 3 0x14200 bored crynlk 61616 147983 0 0 3 0x14200 bored crypto 12016 387645 0 0 3 0x40014200 acpi0 acpi0 19750 310207 0 0 3 0x40014200 idle1 74289 426420 0 0 3 0x14200 bored softnet 81978 383588 0 0 3 0x14200 bored systqmp 93366 200301 0 0 3 0x14200 bored systq 42029 428479 0 0 3 0x40014200 bored softclock 48661 441330 0 0 3 0x40014200 idle0 55008 190705 0 0 2 0x40014200 smr 1 70866 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 51223 (syslogd) thread 0xffff800020b61158 (397048) exclusive rrwlock inode r = 0 (0xfffffd806eb82d58) #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 9585 6584K 6969K 78643K 16612 0 0 pcb 13 8K 8K 78643K 190 0 0 rtable 113 4K 5K 78643K 1044 0 0 ifaddr 77 16K 17K 78643K 402 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1569 0 0 iov 0 0K 20K 78643K 275 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1203 76K 77K 78643K 3348 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 44 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 1K 78643K 247 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 4 9K 25K 78643K 2465 0 0 sigio 1 0K 0K 78643K 21 0 0 proc 54 51K 71K 78643K 928 0 0 subproc 32 2K 2K 78643K 153 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 210 0 0 in_multi 33 2K 2K 78643K 172 0 0 ether_multi 1 0K 0K 78643K 8 0 0 mrt 0 0K 0K 78643K 6 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 78 344K 344K 78643K 78 0 0 exec 0 0K 1K 78643K 478 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 103 21K 30K 78643K 9029 0 0 UVM aobj 119 4K 4K 78643K 127 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 139 0 0 NDP 18 0K 0K 78643K 117 0 0 temp 214 2752K 2823K 78643K 25441 0 0 kqueue 0 0K 0K 78643K 17 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 25 0 18 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 134 0 132 1 0 1 1 0 8 0 rtentry 112 130 0 85 2 0 2 2 0 8 0 unpcb 120 800 0 790 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 8796 0 8796 3 3 0 2 0 8 0 tcpcb 544 406 0 402 1 0 1 1 0 8 0 inpcb 280 1176 0 1167 5 4 1 2 0 8 0 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 27 0 21 1 0 1 1 0 8 0 pkpcb 40 12 0 12 3 3 0 1 0 8 0 ppxss 1128 63 0 63 5 4 1 1 0 8 1 pffrag 232 5 0 5 2 2 0 1 0 482 0 pffrnode 88 5 0 5 2 2 0 1 0 8 0 pffrent 40 17 0 17 3 3 0 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 90 0 58 1 0 1 1 0 8 0 pfstkey 112 90 0 58 2 0 2 2 0 8 0 pfstate 328 90 0 58 4 0 4 4 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 256 514 0 319 14 1 13 13 0 8 0 art_table 32 515 0 319 2 0 2 2 0 8 0 art_node 16 127 0 86 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 13 1 0 1 1 0 8 0 semapl 112 245 0 235 1 0 1 1 0 8 0 shmpl 112 125 0 8 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 5228 0 3816 47 0 47 47 0 8 0 ffsino 272 5228 0 3816 96 0 96 96 0 8 0 nchpl 144 8907 0 7276 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 28351 0 28351 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scsiplug 64 3 0 3 3 2 1 1 0 8 1 scxspl 192 27150 0 27150 18 17 1 6 0 8 1 plimitpl 152 256 0 248 1 0 1 1 0 8 0 sigapl 432 2645 0 2631 3 1 2 3 0 8 0 futexpl 56 29182 0 29182 1 0 1 1 0 8 1 knotepl 112 595 0 576 1 0 1 1 0 8 0 kqueuepl 104 517 0 515 1 0 1 1 0 8 0 pipepl 112 1584 0 1565 5 3 2 2 0 8 1 fdescpl 488 2646 0 2631 3 0 3 3 0 8 0 filepl 152 15572 0 15473 12 5 7 7 0 8 3 lockfpl 104 839 0 839 2 1 1 1 0 8 1 lockfspl 48 287 0 287 2 1 1 1 0 8 1 sessionpl 112 26 0 15 1 0 1 1 0 8 0 pgrppl 48 49 0 38 1 0 1 1 0 8 0 ucredpl 96 2918 0 2909 1 0 1 1 0 8 0 zombiepl 144 2634 0 2632 2 1 1 1 0 8 0 processpl 896 2666 0 2632 4 0 4 4 0 8 0 procpl 632 7885 0 7840 5 0 5 5 0 8 0 srpgc 64 15 0 15 7 6 1 1 0 8 1 sosppl 128 38 0 38 10 9 1 1 0 8 1 sockpl 384 2140 0 2121 8 4 4 4 0 8 2 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 11 0 0 1 0 1 1 0 8 0 mcl8k 8192 9 0 0 2 0 2 2 0 8 0 mcl4k 4096 14 0 0 2 0 2 2 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 260 0 0 32 0 32 32 0 8 1 mtagpl 80 32 0 0 1 0 1 1 0 8 0 mbufpl 256 329 0 0 17 0 17 17 0 8 0 bufpl 256 11719 0 4690 440 0 440 440 0 8 0 anonpl 16 235283 0 225435 101 35 66 66 0 125 16 amapchunkpl 152 15642 0 15527 25 15 10 10 0 158 4 amappl16 192 12099 0 11439 74 32 42 46 0 8 8 amappl15 184 337 0 337 1 1 0 1 0 8 0 amappl14 176 96 0 91 1 0 1 1 0 8 0 amappl13 168 502 0 502 3 3 0 1 0 8 0 amappl12 160 843 0 836 1 0 1 1 0 8 0 amappl11 152 608 0 590 1 0 1 1 0 8 0 amappl10 144 118 0 114 1 0 1 1 0 8 0 amappl9 136 863 0 858 1 0 1 1 0 8 0 amappl8 128 391 0 367 1 0 1 1 0 8 0 amappl7 120 76 0 68 1 0 1 1 0 8 0 amappl6 112 584 0 576 1 0 1 1 0 8 0 amappl5 104 1005 0 990 1 0 1 1 0 8 0 amappl4 96 3164 0 3130 2 1 1 2 0 8 0 amappl3 88 516 0 505 1 0 1 1 0 8 0 amappl2 80 20001 0 19922 3 1 2 3 0 8 0 amappl1 72 66577 0 66112 26 16 10 20 0 8 0 amappl 80 8251 0 8209 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 64 126 0 8 2 0 2 2 0 8 0 uaddrrnd 24 2646 0 2629 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2646 0 2629 1 0 1 1 0 8 0 vmmpekpl 168 25191 0 25161 2 0 2 2 0 8 0 vmmpepl 168 326910 0 324995 218 116 102 102 0 357 18 vmsppl 368 2645 0 2629 2 0 2 2 0 8 0 pdppl 4096 5300 0 5258 6 0 6 6 0 8 0 pvpl 32 676599 0 663480 240 79 161 161 0 265 36 pmappl 232 2645 0 2629 2 1 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 626 0 5 18 0 18 18 0 8 0