witness: thread 0xffff800020b50c70 exiting with the following locks held: exclusive rrwlock inode r = 0 (0xfffffd80789e2928) #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 0xffff800020b50c70 cannot exit while holding sleeplocks Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 90225 91533 73 0x100010 0 0 syslogd *276280 95656 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(ffff800020b50c70) 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 0xffff800020b50c70 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(ffff800020b50c70) 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 0xffff800020afceb0 rbx 0xffff800020afcf60 rdx 0xffff800020affb30 rcx 0 rax 0 r8 0xffffffff817eab83 kprintf+0x173 r9 0x1 r10 0x25 r11 0x792cd30cf92fbfbf r12 0x3000000008 r13 0xffff800020afcec0 r14 0x100 r15 0x1 rip 0xffffffff81ee4248 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020afcea0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (reaper) pid=276280 stat=onproc flags process=14000 proc=200 pri=4, usrpri=54, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab18b0,0xffff800020aff8c8 process=0xffff800020aeae08 user=0xffff800020af8000, vmspace=0xffffffff823b0ae0 estcpu=4, cpticks=11, pctcpu=1.51 user=0, sys=5, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 9077 40911 86401 0 2 0 syz-executor.1 9077 217572 86401 0 3 0x4000080 fsleep syz-executor.1 9077 119507 86401 0 2 0x4000000 syz-executor.1 79566 191213 67177 0 3 0x82 nanosleep syz-executor.0 27880 440891 1 0 3 0x100083 ttyin getty 93254 17719 0 0 3 0x14200 acct acct 86401 326942 67177 0 3 0x82 nanosleep syz-executor.1 64076 76816 0 0 3 0x14200 bored sosplice 67177 345195 30591 0 3 0x82 thrsleep syz-fuzzer 67177 423455 30591 0 3 0x4000082 thrsleep syz-fuzzer 67177 456089 30591 0 3 0x4000082 thrsleep syz-fuzzer 67177 516893 30591 0 3 0x4000082 thrsleep syz-fuzzer 67177 101669 30591 0 3 0x4000082 thrsleep syz-fuzzer 67177 250414 30591 0 3 0x4000082 thrsleep syz-fuzzer 67177 68873 30591 0 3 0x4000082 thrsleep syz-fuzzer 67177 64265 30591 0 3 0x4000082 thrsleep syz-fuzzer 67177 425530 30591 0 3 0x4000082 thrsleep syz-fuzzer 67177 395868 30591 0 3 0x4000082 kqread syz-fuzzer 30591 334665 69534 0 3 0x10008a pause ksh 69534 16828 19192 0 3 0x92 select sshd 19192 62745 1 0 3 0x80 select sshd 4601 239707 87894 74 3 0x100092 bpf pflogd 87894 76335 1 0 3 0x80 netio pflogd 91533 90225 72123 73 7 0x100010 syslogd 72123 180306 1 0 3 0x100082 netio syslogd 26445 405617 1 77 3 0x100090 poll dhclient 144 465694 1 0 3 0x80 poll dhclient 59093 328292 0 0 2 0x14200 zerothread 3902 350566 0 0 3 0x14200 aiodoned aiodoned 76639 172817 0 0 3 0x14200 syncer update 57124 240370 0 0 3 0x14200 cleaner cleaner *95656 276280 0 0 7 0x14200 reaper 7351 495785 0 0 3 0x14200 pgdaemon pagedaemon 69710 87717 0 0 3 0x14200 bored crynlk 89055 404939 0 0 3 0x14200 bored crypto 42057 361108 0 0 3 0x40014200 acpi0 acpi0 97824 454129 0 0 3 0x40014200 idle1 57067 42150 0 0 3 0x14200 bored softnet 2285 519507 0 0 3 0x14200 bored systqmp 68537 85286 0 0 3 0x14200 bored systq 10929 314541 0 0 3 0x40014200 bored softclock 57641 447798 0 0 3 0x40014200 idle0 22872 274302 0 0 3 0x14200 bored smr 1 189257 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 9077 (syz-executor.1) thread 0xffff800020b518c8 (40911) exclusive rrwlock inode r = 0 (0xfffffd806b12ff78) #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 vget+0x1c3 sys/kern/vfs_subr.c:672 #6 ktrwriteraw+0x131 sys/kern/kern_ktrace.c:652 #7 ktrstruct+0x169 ktrwrite2 sys/kern/kern_ktrace.c:620 [inline] #7 ktrstruct+0x169 sys/kern/kern_ktrace.c:306 #8 sys_clock_gettime+0xfb sys/kern/kern_time.c:172 #9 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] #9 syscall+0x552 sys/arch/amd64/amd64/trap.c:555 #10 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8236dce0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 ktrstruct+0xee sys/kern/kern_ktrace.c:306 #2 sys_clock_gettime+0xfb sys/kern/kern_time.c:172 #3 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] #3 syscall+0x552 sys/arch/amd64/amd64/trap.c:555 #4 Xsyscall+0x128 Process 91533 (syslogd) thread 0xffff800020b60c68 (90225) exclusive rrwlock inode r = 0 (0xfffffd806eb6cd58) #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 9523 6422K 14680K 78643K 13990 0 0 pcb 13 8K 8K 78643K 109 0 0 rtable 111 4K 4K 78643K 465 0 0 ifaddr 59 13K 14K 78643K 151 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1549 0 0 iov 0 0K 24K 78643K 156 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1216 76K 77K 78643K 2448 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 18 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 0K 0K 78643K 142 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 5 13K 25K 78643K 1357 0 0 sigio 0 0K 0K 78643K 12 0 0 proc 54 51K 83K 78643K 671 0 0 subproc 32 2K 2K 78643K 68 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 75 0 0 in_multi 33 2K 2K 78643K 81 0 0 ether_multi 1 0K 0K 78643K 3 0 0 mrt 0 0K 0K 78643K 7 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 72 318K 318K 78643K 72 0 0 exec 0 0K 1K 78643K 368 0 0 pfkey data 0 0K 4K 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 101 21K 25K 78643K 5360 0 0 UVM aobj 53 2K 2K 78643K 57 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 67 0 0 NDP 12 0K 0K 78643K 42 0 0 temp 172 2751K 2823K 78643K 8724 0 0 kqueue 0 0K 0K 78643K 2 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 11 0 5 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 71 0 69 1 0 1 1 0 8 0 rtentry 112 69 0 25 2 0 2 2 0 8 0 unpcb 120 462 0 452 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 9002 0 9002 1 1 0 1 0 8 0 tcpcb 544 177 0 173 1 0 1 1 0 8 0 inpcb 280 579 0 571 1 0 1 1 0 8 0 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 12 0 6 1 0 1 1 0 8 0 pkpcb 40 6 0 6 3 2 1 1 0 8 1 ppxss 1128 18 0 18 6 6 0 1 0 8 0 pffrag 232 2 0 2 1 0 1 1 0 482 1 pffrnode 88 2 0 2 1 0 1 1 0 8 1 pffrent 40 4 0 4 1 0 1 1 0 8 1 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 35 0 17 1 0 1 1 0 8 0 pfstkey 112 35 0 17 1 0 1 1 0 8 0 pfstate 328 35 0 17 2 0 2 2 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 256 298 0 104 14 1 13 13 0 8 0 art_table 32 299 0 104 2 0 2 2 0 8 0 art_node 16 68 0 28 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 3 1 0 1 1 0 8 0 semapl 112 140 0 130 1 0 1 1 0 8 0 shmpl 112 55 0 4 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 3551 0 2135 47 0 47 47 0 8 0 ffsino 272 3551 0 2135 96 0 96 96 0 8 0 nchpl 144 5623 0 3982 62 0 62 62 0 8 0 uvmvnodes 72 4443 0 0 81 0 81 81 0 8 0 vnodes 200 4443 0 0 234 0 234 234 0 8 0 namei 1024 17781 0 17781 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 16504 0 16503 13 12 1 6 0 8 0 plimitpl 152 143 0 135 1 0 1 1 0 8 0 sigapl 432 1554 0 1539 3 1 2 3 0 8 0 futexpl 56 16523 0 16522 1 0 1 1 0 8 0 knotepl 112 307 0 288 1 0 1 1 0 8 0 kqueuepl 104 286 0 284 1 0 1 1 0 8 0 pipepl 112 860 0 841 3 1 2 2 0 8 1 fdescpl 488 1555 0 1539 3 0 3 3 0 8 0 filepl 152 9053 0 8951 9 2 7 7 0 8 2 lockfpl 104 490 0 490 2 1 1 1 0 8 1 lockfspl 48 171 0 171 2 1 1 1 0 8 1 sessionpl 112 23 0 12 1 0 1 1 0 8 0 pgrppl 48 33 0 22 1 0 1 1 0 8 0 ucredpl 96 1745 0 1736 1 0 1 1 0 8 0 zombiepl 144 1539 0 1538 2 1 1 1 0 8 0 processpl 896 1572 0 1538 4 0 4 4 0 8 0 procpl 632 4463 0 4418 5 0 5 5 0 8 1 srpgc 64 5 0 5 3 3 0 1 0 8 0 sosppl 128 24 0 24 5 4 1 1 0 8 1 sockpl 384 1137 0 1117 6 2 4 4 0 8 2 mcl64k 65536 13 0 0 2 0 2 2 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 12 0 0 2 0 2 2 0 8 0 mcl9k 9216 7 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 9 0 0 2 0 2 2 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 171 0 0 20 1 19 20 0 8 0 mtagpl 80 19 0 0 1 0 1 1 0 8 0 mbufpl 256 229 0 0 14 2 12 12 0 8 0 bufpl 256 8972 0 1943 440 0 440 440 0 8 0 anonpl 16 146589 0 134335 72 19 53 66 0 125 0 amapchunkpl 152 9022 0 8910 17 11 6 10 0 158 0 amappl16 192 7577 0 6882 53 15 38 43 0 8 3 amappl14 176 75 0 68 1 0 1 1 0 8 0 amappl13 168 7 0 7 1 1 0 1 0 8 0 amappl12 160 38 0 34 1 0 1 1 0 8 0 amappl11 152 63 0 48 1 0 1 1 0 8 0 amappl10 144 408 0 400 1 0 1 1 0 8 0 amappl9 136 1036 0 1031 1 0 1 1 0 8 0 amappl8 128 581 0 561 1 0 1 1 0 8 0 amappl7 120 367 0 360 1 0 1 1 0 8 0 amappl6 112 68 0 62 1 0 1 1 0 8 0 amappl5 104 156 0 141 1 0 1 1 0 8 0 amappl4 96 1839 0 1807 2 1 1 2 0 8 0 amappl3 88 227 0 216 1 0 1 1 0 8 0 amappl2 80 11482 0 11402 3 1 2 3 0 8 0 amappl1 72 43252 0 42781 26 16 10 20 0 8 0 amappl 80 4748 0 4708 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 56 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1555 0 1538 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1555 0 1538 1 0 1 1 0 8 0 vmmpekpl 168 15245 0 15206 2 0 2 2 0 8 0 vmmpepl 168 192436 0 190483 163 69 94 104 0 357 9 vmsppl 368 1554 0 1538 2 0 2 2 0 8 0 pdppl 4096 3117 0 3076 7 1 6 6 0 8 0 pvpl 32 433201 0 417354 206 66 140 167 0 265 11 pmappl 232 1554 0 1538 2 1 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 610 0 9 18 0 18 18 0 8 0