witness: thread 0xffff800020a88508 exiting with the following locks held: exclusive rrwlock inode r = 0 (0xfffffd8065d273d8) #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 0xffff800020a88508 cannot exit while holding sleeplocks Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *412617 37103 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(ffff800020a88508) at witness_thread_exit+0x213 sys/kern/subr_witness.c:1364 reaper(ffff800020a5fb30) 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}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic thread 0xffff800020a88508 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(ffff800020a88508) at witness_thread_exit+0x213 sys/kern/subr_witness.c:1364 reaper(ffff800020a5fb30) at reaper+0x14c sys/kern/kern_exit.c:423 end trace frame: 0x0, count: -4 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020a5da80 rbx 0xffff800020a5db30 rdx 0xffff800020a5fb30 rcx 0 rax 0 r8 0xffffffff8145b623 kprintf+0x173 r9 0x1 r10 0x25 r11 0x5114c977cd23dcfd r12 0x3000000008 r13 0xffff800020a5da90 r14 0x100 r15 0x1 rip 0xffffffff81c821e8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a5da70 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (reaper) pid=412617 stat=onproc flags process=14000 proc=200 pri=4, usrpri=53, nice=20 forw=0xffffffffffffffff, list=0xffff800020a11638,0xffff800020a5f8c8 process=0xffff800020a4aa88 user=0xffff800020a58000, vmspace=0xffffffff8262f4c8 estcpu=3, cpticks=14, pctcpu=1.16 user=0, sys=6, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 28296 197074 0 0 2 0x14200 acct 63490 347361 59522 0 2 0x482 syz-executor.0 65006 182363 0 0 3 0x14200 bored sosplice 99254 474373 59522 0 2 0x482 syz-executor.1 59522 347060 92701 0 3 0x82 thrsleep syz-fuzzer 59522 314108 92701 0 3 0x4000082 thrsleep syz-fuzzer 59522 192806 92701 0 3 0x4000082 thrsleep syz-fuzzer 59522 11772 92701 0 3 0x4000082 thrsleep syz-fuzzer 59522 411770 92701 0 3 0x4000082 thrsleep syz-fuzzer 59522 79623 92701 0 3 0x4000082 thrsleep syz-fuzzer 59522 101755 92701 0 3 0x4000082 kqread syz-fuzzer 59522 455373 92701 0 3 0x4000082 thrsleep syz-fuzzer 59522 328376 92701 0 3 0x4000082 thrsleep syz-fuzzer 59522 65671 92701 0 3 0x4000082 thrsleep syz-fuzzer 92701 370827 75772 0 3 0x10008a pause ksh 75772 319821 38580 0 3 0x92 select sshd 50013 50584 1 0 3 0x100083 ttyin getty 38580 242587 1 0 3 0x80 select sshd 8444 46027 88533 74 3 0x100092 bpf pflogd 88533 241972 1 0 3 0x80 netio pflogd 47334 307661 50035 73 2 0x100090 syslogd 50035 218327 1 0 3 0x100082 netio syslogd 77174 329256 1 77 3 0x100090 poll dhclient 44208 189408 1 0 3 0x80 poll dhclient 72430 452286 0 0 3 0x14200 pgzero zerothread 9960 463313 0 0 3 0x14200 aiodoned aiodoned 43852 4448 0 0 3 0x14200 syncer update 88837 105767 0 0 3 0x14200 cleaner cleaner *37103 412617 0 0 7 0x14200 reaper 2854 147581 0 0 3 0x14200 pgdaemon pagedaemon 3837 209829 0 0 3 0x14200 bored crynlk 27253 377669 0 0 3 0x14200 bored crypto 40594 521343 0 0 3 0x40014200 acpi0 acpi0 57386 20071 0 0 7 0x40014200 idle1 93480 165915 0 0 3 0x14200 bored softnet 80832 148925 0 0 3 0x14200 bored systqmp 79255 267929 0 0 3 0x14200 bored systq 57301 463518 0 0 2 0x40014200 softclock 29275 125258 0 0 3 0x40014200 idle0 16792 54499 0 0 2 0x40014200 smr 1 426970 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9535 6678K 6807K 78643K 11989 0 0 pcb 13 8K 8K 78643K 582 0 0 rtable 111 4K 5K 78643K 913 0 0 ifaddr 56 13K 13K 78643K 110 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1487 0 0 iov 0 0K 16K 78643K 61 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1213 76K 77K 78643K 1704 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 12 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 1K 1K 78643K 73 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 4 9K 25K 78643K 932 0 0 sigio 0 0K 0K 78643K 7 0 0 proc 54 51K 71K 78643K 490 0 0 subproc 32 2K 2K 78643K 54 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 67 0 0 in_multi 33 2K 2K 78643K 63 0 0 ether_multi 1 0K 0K 78643K 2 0 0 mrt 0 0K 0K 78643K 350 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 66 291K 291K 78643K 66 0 0 exec 0 0K 1K 78643K 269 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 96 21K 30K 78643K 3759 0 0 UVM aobj 23 2K 2K 78643K 24 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 29 0 0 NDP 11 0K 0K 78643K 30 0 0 temp 165 3539K 3606K 78643K 7436 0 0 kqueue 0 0K 0K 78643K 5 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 8 0 2 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 548 0 546 1 0 1 1 0 8 0 rtentry 112 217 0 173 2 0 2 2 0 8 0 unpcb 120 239 0 229 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 8498 0 8498 1 1 0 1 0 8 0 tcpcb 544 117 0 109 1 0 1 1 0 8 0 inpcb 280 832 0 825 3 2 1 2 0 8 0 rttmr 72 161 0 161 1 1 0 1 0 8 0 nd6 48 9 0 3 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 9 0 9 3 2 1 1 0 8 1 pffrag 232 2 0 2 2 2 0 1 0 482 0 pffrnode 88 2 0 2 2 2 0 1 0 8 0 pffrent 40 5 0 5 2 2 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 34 0 19 1 0 1 1 0 8 0 pfstkey 112 34 0 19 1 0 1 1 0 8 0 pfstate 328 34 0 19 3 0 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 256 249 0 58 13 1 12 13 0 8 0 art_table 32 250 0 58 2 0 2 2 0 8 0 art_node 16 216 0 176 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 6 1 0 1 1 0 8 0 semapl 112 71 0 61 1 0 1 1 0 8 0 shmpl 112 22 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2658 0 1238 47 0 47 47 0 8 0 ffsino 272 2658 0 1238 96 0 96 96 0 8 0 nchpl 144 4068 0 2438 62 0 62 62 0 8 0 uvmvnodes 72 3053 0 0 56 0 56 56 0 8 0 vnodes 200 3053 0 0 161 0 161 161 0 8 0 namei 1024 11343 0 11343 3 2 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scsiplug 64 2 0 2 2 2 0 1 0 8 0 scxspl 192 11675 0 11675 15 12 3 7 0 8 3 plimitpl 152 65 0 57 1 0 1 1 0 8 0 sigapl 432 1129 0 1115 3 1 2 3 0 8 0 futexpl 56 11844 0 11844 2 1 1 1 0 8 1 knotepl 112 151 0 132 1 0 1 1 0 8 0 kqueuepl 104 118 0 116 1 0 1 1 0 8 0 pipepl 112 548 0 529 3 2 1 2 0 8 0 fdescpl 488 1130 0 1115 3 0 3 3 0 8 0 filepl 152 5950 0 5851 8 3 5 6 0 8 1 lockfpl 104 230 0 230 3 2 1 1 0 8 1 lockfspl 48 82 0 82 3 2 1 1 0 8 1 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 23 0 12 1 0 1 1 0 8 0 ucredpl 96 609 0 600 1 0 1 1 0 8 0 zombiepl 144 1115 0 1113 2 1 1 1 0 8 0 processpl 896 1147 0 1113 4 0 4 4 0 8 0 procpl 632 2944 0 2900 6 2 4 5 0 8 0 srpgc 64 163 0 163 1 1 0 1 0 8 0 sosppl 128 4 0 4 2 2 0 1 0 8 0 sockpl 384 1632 0 1613 6 3 3 4 0 8 1 mcl64k 65536 258 0 0 33 3 30 33 0 8 1 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 8 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 8 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 145 0 0 17 1 16 17 0 8 0 mtagpl 80 5 0 0 1 0 1 1 0 8 0 mbufpl 256 350 0 0 21 0 21 21 0 8 0 bufpl 256 7520 0 1169 397 0 397 397 0 8 0 anonpl 16 104594 0 92517 79 14 65 65 0 124 14 amapchunkpl 152 5867 0 5759 13 8 5 10 0 158 0 amappl16 192 5093 0 4424 55 9 46 46 0 8 12 amappl15 184 1 0 1 1 1 0 1 0 8 0 amappl14 176 414 0 408 1 0 1 1 0 8 0 amappl13 168 8 0 8 1 1 0 1 0 8 0 amappl12 160 115 0 110 1 0 1 1 0 8 0 amappl11 152 498 0 480 1 0 1 1 0 8 0 amappl10 144 76 0 72 1 0 1 1 0 8 0 amappl9 136 611 0 608 1 0 1 1 0 8 0 amappl8 128 162 0 145 1 0 1 1 0 8 0 amappl7 120 40 0 36 1 0 1 1 0 8 0 amappl6 112 485 0 479 1 0 1 1 0 8 0 amappl5 104 252 0 234 1 0 1 1 0 8 0 amappl4 96 1291 0 1262 2 1 1 2 0 8 0 amappl3 88 659 0 648 1 0 1 1 0 8 0 amappl2 80 8046 0 7969 3 1 2 3 0 8 0 amappl1 72 34022 0 33568 26 16 10 20 0 8 0 amappl 80 3211 0 3172 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 23 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1130 0 1113 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1130 0 1113 1 0 1 1 0 8 0 vmmpekpl 168 12540 0 12507 2 0 2 2 0 8 0 vmmpepl 168 142688 0 140800 143 49 94 101 0 357 11 vmsppl 368 1129 0 1113 2 0 2 2 0 8 0 pdppl 4096 2267 0 2226 7 1 6 6 0 8 0 pvpl 32 311379 0 296048 206 45 161 161 0 265 34 pmappl 232 1129 0 1113 2 1 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 601 0 11 17 0 17 17 0 8 0