witness: thread 0xffff800020ab0290 exiting with the following locks held: exclusive rrwlock inode r = 0 (0xfffffd806e56fa30) #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 0xffff800020ab0290 cannot exit while holdi ng sleeplocks Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 193909 89727 0 0x100003 0x80 1 getty *478316 45751 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:207 witness_thread_exit(ffff800020ab0290) at witness_thread_exit+0x213 sys/kern/subr_witness.c:1364 reaper(ffff800020a5f3c8) 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{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic thread 0xffff800020ab0290 cannot exit while holding sleeplocks ddb{0}> 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(ffff800020ab0290) at witness_thread_exit+0x213 sys/kern/subr_witness.c:1364 reaper(ffff800020a5f3c8) at reaper+0x14c sys/kern/kern_exit.c:423 end trace frame: 0x0, count: -4 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020a5d4c0 rbx 0xffff800020a5d570 rdx 0xffff800020a5f3c8 rcx 0 rax 0 r8 0xffffffff81096913 kprintf+0x173 r9 0x1 r10 0x25 r11 0x9547ffd4f90d562e r12 0x3000000008 r13 0xffff800020a5d4d0 r14 0x100 r15 0x1 rip 0xffffffff81e731e8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a5d4b0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (reaper) pid=478316 stat=onproc flags process=14000 proc=200 pri=4, usrpri=53, nice=20 forw=0xffffffffffffffff, list=0xffff800020a118b0,0xffff800020a5eee8 process=0xffff800020a4a008 user=0xffff800020a58000, vmspace=0xffffffff8261f828 estcpu=3, cpticks=6, pctcpu=0.62 user=0, sys=5, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 48693 328068 91948 0 3 0x80 nanosleep syz-executor.1 48693 252398 91948 0 2 0x4000000 syz-executor.1 91948 10634 44656 0 3 0x82 nanosleep syz-executor.1 29222 482771 44656 0 3 0x82 nanosleep syz-executor.0 27992 517291 0 0 3 0x14200 acct acct 83585 490643 0 0 3 0x14200 bored sosplice 44656 88587 29391 0 3 0x82 thrsleep syz-fuzzer 44656 327990 29391 0 3 0x4000082 thrsleep syz-fuzzer 44656 75923 29391 0 3 0x4000082 kqread syz-fuzzer 44656 134062 29391 0 3 0x4000082 thrsleep syz-fuzzer 44656 459362 29391 0 3 0x4000082 thrsleep syz-fuzzer 44656 302288 29391 0 3 0x4000082 thrsleep syz-fuzzer 44656 198822 29391 0 3 0x4000082 thrsleep syz-fuzzer 44656 29255 29391 0 3 0x4000082 thrsleep syz-fuzzer 44656 115571 29391 0 3 0x4000082 thrsleep syz-fuzzer 44656 108470 29391 0 3 0x4000082 thrsleep syz-fuzzer 44656 5006 29391 0 3 0x4000082 thrsleep syz-fuzzer 29391 397115 59313 0 3 0x10008a pause ksh 59313 148476 60563 0 3 0x92 select sshd 89727 193909 1 0 7 0x100083 getty 60563 341053 1 0 3 0x80 select sshd 75355 471104 14740 74 3 0x100092 bpf pflogd 14740 426191 1 0 3 0x80 netio pflogd 16369 389820 95557 73 2 0x100010 syslogd 95557 191672 1 0 3 0x100082 netio syslogd 53503 372533 1 77 3 0x100090 poll dhclient 68711 455998 1 0 3 0x80 poll dhclient 78121 435320 0 0 3 0x14200 pgzero zerothread 4947 295359 0 0 3 0x14200 aiodoned aiodoned 20270 415020 0 0 3 0x14200 syncer update 48894 151826 0 0 3 0x14200 cleaner cleaner *45751 478316 0 0 7 0x14200 reaper 42689 376545 0 0 3 0x14200 pgdaemon pagedaemon 6966 208488 0 0 3 0x14200 bored crynlk 72190 116805 0 0 3 0x14200 bored crypto 18527 51118 0 0 3 0x40014200 acpi0 acpi0 3450 163676 0 0 3 0x40014200 idle1 89995 400920 0 0 3 0x14200 bored softnet 31371 238144 0 0 3 0x14200 bored systqmp 31682 75514 0 0 3 0x14200 bored systq 72564 273599 0 0 3 0x40014200 bored softclock 8704 354656 0 0 3 0x40014200 idle0 76287 194450 0 0 2 0x40014200 smr 1 352330 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 16369 (syslogd) thread 0xffff800020ac0ee0 (389820) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82638140) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 #2 mi_switch+0x38f sys/kern/sched_bsd.c:441 #3 sleep_finish+0x113 sys/kern/kern_synch.c:373 #4 tsleep+0x198 sleep_finish_timeout sys/kern/kern_synch.c:397 [inline] #4 tsleep+0x198 sleep_finish_all sys/kern/kern_synch.c:183 [inline] #4 tsleep+0x198 sys/kern/kern_synch.c:152 #5 biowait+0xa1 sys/kern/vfs_bio.c:1231 #6 bwrite+0x1e1 sys/kern/vfs_bio.c:747 #7 ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113 #8 VOP_FSYNC+0xc7 sys/kern/vfs_vops.c:352 #9 sys_fsync+0x128 sys/kern/vfs_syscalls.c:2806 #10 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] #10 syscall+0x552 sys/arch/amd64/amd64/trap.c:555 #11 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9643 6866K 15411K 78643K 45566 0 0 pcb 13 8K 8K 78643K 970 0 0 rtable 111 4K 5K 78643K 4282 0 0 ifaddr 87 23K 27K 78643K 1544 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 2131 0 0 iov 0 0K 32K 78643K 1601 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1190 75K 77K 78643K 13672 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 9K 78643K 200 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 1394 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 5 13K 25K 78643K 14307 0 0 sigio 0 0K 0K 78643K 175 0 0 proc 54 51K 83K 78643K 3434 0 0 subproc 32 2K 2K 78643K 745 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 1204 0 0 in_multi 33 2K 2K 78643K 910 0 0 ether_multi 1 0K 0K 78643K 63 0 0 mrt 0 0K 0K 78643K 40 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 132 583K 583K 78643K 132 0 0 exec 0 0K 1K 78643K 1899 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 118 22K 31K 78643K 47798 0 0 UVM aobj 130 4K 4K 78643K 157 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 1K 78643K 734 0 0 NDP 21 0K 1K 78643K 473 0 0 temp 235 3545K 4184K 78643K 188688 0 0 kqueue 0 0K 0K 78643K 93 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 91 0 85 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 605 0 603 1 0 1 1 0 8 0 rtentry 112 509 0 465 5 3 2 2 0 8 0 unpcb 120 4502 0 4492 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 sackhl 24 2 0 2 1 1 0 1 0 8 0 tcpqe 32 8499 0 8499 2 2 0 2 0 8 0 tcpcb 544 2235 0 2231 1 0 1 1 0 8 0 inpcb 280 6581 0 6574 7 6 1 2 0 8 0 rttmr 72 7 0 7 7 7 0 1 0 8 0 nd6 48 129 0 123 2 1 1 1 0 8 0 pkpcb 40 71 0 71 24 24 0 1 0 8 0 swfcl 56 4 0 0 1 0 1 1 0 8 0 ppxss 1128 263 0 263 50 50 0 1 0 8 0 pffrag 232 26 0 26 15 15 0 1 0 482 0 pffrnode 88 26 0 26 15 15 0 1 0 8 0 pffrent 40 69 0 69 17 17 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 24 409 0 386 1 0 1 1 0 8 0 pfstkey 112 409 0 386 2 0 2 2 0 8 0 pfstate 328 409 0 386 9 6 3 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 2143 0 1946 30 17 13 13 0 8 0 art_table 32 2144 0 1946 3 1 2 2 0 8 0 art_node 16 505 0 465 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 12 2 2 0 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 1392 0 1382 1 0 1 1 0 8 0 shmpl 112 155 0 27 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 23478 0 22030 47 0 47 47 0 8 0 ffsino 272 23478 0 22030 97 0 97 97 0 8 0 nchpl 144 43926 0 42291 62 0 62 62 0 8 0 uvmvnodes 72 6240 0 0 114 0 114 114 0 8 0 vnodes 200 6240 0 0 329 0 329 329 0 8 0 namei 1024 144007 0 144007 4 3 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scsiplug 64 37 0 37 25 25 0 1 0 8 0 scxspl 192 139348 0 139348 70 69 1 7 0 8 1 plimitpl 152 1246 0 1238 1 0 1 1 0 8 0 sigapl 432 14384 0 14369 5 3 2 3 0 8 0 futexpl 56 169648 0 169648 1 0 1 1 0 8 1 knotepl 112 2905 0 2886 1 0 1 1 0 8 0 kqueuepl 104 3026 0 3024 1 0 1 1 0 8 0 pipepl 112 7814 0 7795 15 14 1 2 0 8 0 fdescpl 488 14385 0 14369 3 0 3 3 0 8 0 filepl 152 84385 0 84286 33 28 5 7 0 8 1 lockfpl 104 4736 0 4736 6 5 1 1 0 8 1 lockfspl 48 1620 0 1620 6 5 1 1 0 8 1 sessionpl 112 59 0 48 1 0 1 1 0 8 0 pgrppl 48 206 0 195 1 0 1 1 0 8 0 ucredpl 96 17063 0 17053 1 0 1 1 0 8 0 zombiepl 144 14371 0 14370 2 1 1 1 0 8 0 processpl 896 14404 0 14370 6 2 4 5 0 8 0 procpl 632 44842 0 44797 21 16 5 5 0 8 1 srpgc 64 89 0 89 40 40 0 1 0 8 0 sosppl 128 182 0 182 38 37 1 1 0 8 1 sockpl 384 11891 0 11872 17 14 3 4 0 8 1 mcl64k 65536 664 0 0 78 74 4 65 0 8 0 mcl16k 16384 21 0 0 3 1 2 3 0 8 0 mcl12k 12288 49 0 0 2 0 2 2 0 8 0 mcl9k 9216 33 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 25 0 0 3 0 3 3 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 293 0 0 28 12 16 28 0 8 0 mtagpl 80 73 0 0 1 0 1 1 0 8 0 mbufpl 256 1207 0 0 37 2 35 37 0 8 0 bufpl 256 41602 0 34583 439 0 439 439 0 8 0 anonpl 16 1324489 0 1312288 288 223 65 68 0 124 7 amapchunkpl 152 86666 0 86557 71 66 5 10 0 158 0 amappl16 192 72401 0 71708 365 321 44 48 0 8 8 amappl15 184 2800 0 2800 7 7 0 1 0 8 0 amappl14 176 2426 0 2421 1 0 1 1 0 8 0 amappl13 168 2840 0 2838 7 6 1 1 0 8 0 amappl12 160 3379 0 3373 2 1 1 1 0 8 0 amappl11 152 1911 0 1896 1 0 1 1 0 8 0 amappl10 144 1683 0 1679 1 0 1 1 0 8 0 amappl9 136 1434 0 1431 1 0 1 1 0 8 0 amappl8 128 939 0 896 3 1 2 2 0 8 0 amappl7 120 1719 0 1710 1 0 1 1 0 8 0 amappl6 112 1812 0 1804 1 0 1 1 0 8 0 amappl5 104 3859 0 3842 1 0 1 1 0 8 0 amappl4 96 12227 0 12194 2 1 1 2 0 8 0 amappl3 88 5378 0 5367 1 0 1 1 0 8 0 amappl2 80 114353 0 114271 3 1 2 3 0 8 0 amappl1 72 321453 0 320981 26 16 10 20 0 8 0 amappl 80 45805 0 45766 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 64 156 0 27 3 0 3 3 0 8 0 uaddrrnd 24 14385 0 14368 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 14385 0 14368 1 0 1 1 0 8 0 vmmpekpl 168 104177 0 104139 2 0 2 2 0 8 0 vmmpepl 168 1752038 0 1750070 603 507 96 110 0 357 8 vmsppl 368 14384 0 14368 2 0 2 2 0 8 0 pdppl 4096 28777 0 28736 7 1 6 6 0 8 0 pvpl 32 3579461 0 3563965 683 521 162 166 0 265 29 pmappl 232 14384 0 14368 5 4 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 740 0 113 20 0 20 20 0 8 0