Warning: Permanently added '10.128.0.66' (ECDSA) to the list of known hosts. witness: userret: returning with the following locks held: exclusive rwlock netlock r = 0 (0xffffffff82748670) #0 witness_lock+0x4b0 #1 pfioctl+0x1fc7 #2 VOP_IOCTL+0x9a #3 vn_ioctl+0xba #4 sys_ioctl+0x4b0 #5 syscall+0x4a1 #6 Xsyscall+0x128 panic: witness_warn Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 10121 21389 0 0x2 0 0 syz-executor2539 db_enter() at db_enter+0x18 panic(ffffffff823becb8) at panic+0x15e witness_warn(2,0,ffffffff8243f0a3) at witness_warn+0x68f userret(ffff8000ffff7720) at userret+0x337 syscall(ffff800021265670) at syscall+0x55c Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffa6c0, count: 9 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 witness_warn ddb{0}> trace db_enter() at db_enter+0x18 panic(ffffffff823becb8) at panic+0x15e witness_warn(2,0,ffffffff8243f0a3) at witness_warn+0x68f userret(ffff8000ffff7720) at userret+0x337 syscall(ffff800021265670) at syscall+0x55c Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffa6c0, count: -6 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000212653c0 rbx 0xffff8000212653d0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff821a7fd6 kprintf+0x146 r9 0x1 r10 0x7a3a2598fac713c6 r11 0x6fc419eccdd6605 r12 0x3000000008 r13 0xffff800021265470 r14 0x100 r15 0x1 rip 0xffffffff81213b78 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000212653b0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor2539) pid=10121 stat=onproc flags process=2 proc=0 pri=55, usrpri=56, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff79b0,0xffffffff82893308 process=0xffff80002125d090 user=0xffff800021260000, vmspace=0xfffffd806e963008 estcpu=6, cpticks=3, pctcpu=0.0 user=0, sys=3, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *21389 10121 82805 0 7 0x2 syz-executor2539 82805 140132 93966 0 3 0x10008a pause ksh 93966 358023 25233 0 3 0x52 netlock sshd 82481 402492 1 0 3 0x100083 ttyin getty 25233 169491 1 0 3 0x80 select sshd 38812 45768 76525 74 3 0x100092 bpf pflogd 76525 498208 1 0 3 0x80 netio pflogd 75498 385478 83375 73 3 0x100010 ffs_fsync syslogd 83375 223131 1 0 3 0x100082 netio syslogd 34914 186540 1 77 3 0x100090 poll dhclient 66521 444419 1 0 3 0x80 poll dhclient 95394 319143 0 0 3 0x14200 bored smr 99159 237799 0 0 3 0x14200 pgzero zerothread 34469 271224 0 0 3 0x14200 aiodoned aiodoned 1828 290997 0 0 3 0x14200 syncer update 60905 251221 0 0 3 0x14200 cleaner cleaner 49122 66996 0 0 3 0x14200 reaper reaper 8954 486062 0 0 3 0x14200 pgdaemon pagedaemon 38533 173370 0 0 3 0x14200 bored crynlk 70534 292390 0 0 3 0x14200 bored crypto 20476 260354 0 0 3 0x14200 bored viomb 33004 142852 0 0 3 0x40014200 acpi0 acpi0 53878 304808 0 0 7 0x40014200 idle1 21573 8622 0 0 3 0x14200 bored softnet 98491 241351 0 0 3 0x14200 bored systqmp 94220 338954 0 0 3 0x14200 bored systq 95425 190288 0 0 3 0x40014200 bored softclock 7861 213667 0 0 3 0x40014200 idle0 1 402624 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 21389 (syz-executor2539) thread 0xffff8000ffff7720 (10121) exclusive rwlock netlock r = 0 (0xffffffff82748670) #0 witness_lock+0x4b0 #1 pfioctl+0x1fc7 #2 VOP_IOCTL+0x9a #3 vn_ioctl+0xba #4 sys_ioctl+0x4b0 #5 syscall+0x4a1 #6 Xsyscall+0x128 Process 75498 (syslogd) thread 0xffff8000ffff6ce0 (385478) exclusive rrwlock inode r = 0 (0xfffffd807357a1a8) #0 witness_lock+0x4b0 #1 rw_enter+0x446 #2 rrw_enter+0x88 #3 VOP_LOCK+0x4b #4 vn_lock+0x6c #5 sys_fsync+0x113 #6 syscall+0x4a1 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9474 6410K 6411K 78643K 10565 0 pcb 13 8K 8K 78643K 13 0 rtable 61 2K 2K 78643K 127 0 ifaddr 29 8K 8K 78643K 30 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 4K 78643K 1467 0 mount 1 1K 1K 78643K 1 0 vnodes 1183 74K 75K 78643K 1188 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1825 197K 290K 78643K 13109 0 file desc 1 0K 0K 78643K 1 0 proc 59 63K 71K 78643K 367 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 0K 78643K 11 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 19 95K 95K 78643K 19 0 exec 0 0K 2K 78643K 302 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 37 2K 2K 78643K 595 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 4 0K 0K 78643K 4 0 temp 23 3949K 4013K 78643K 1688 0 kqueue 2 2K 2K 78643K 2 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 2 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 120 15 0 13 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 120 29 0 19 1 0 1 1 0 8 0 syncache 296 5 0 5 2 1 1 1 0 8 1 tcpcb 736 8 0 5 1 0 1 1 0 8 0 inpcb 296 29 0 23 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 9 0 0 1 0 1 1 0 8 0 pfstkey 112 9 0 0 1 0 1 1 0 8 0 pfstate 328 9 0 0 1 0 1 1 0 8 0 pfrule 1360 21 0 15 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 96 0 0 6 0 6 6 0 8 0 art_table 32 97 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1398 0 16 87 0 87 87 0 8 0 ffsino 272 1398 0 16 93 0 93 93 0 8 0 nchpl 144 1572 0 33 59 1 58 58 0 8 0 uvmvnodes 72 1408 0 0 26 0 26 26 0 8 0 vnodes 208 1408 0 0 75 0 75 75 0 8 0 namei 1024 3781 0 3781 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 216 3281 0 3280 2 1 1 2 0 8 0 plimitpl 152 14 0 8 1 0 1 1 0 8 0 sigapl 424 221 0 192 4 0 4 4 0 8 0 knotepl 112 5 0 0 1 0 1 1 0 8 0 kqueuepl 152 1 0 0 1 0 1 1 0 8 0 pipepl 304 64 0 60 2 1 1 1 0 8 0 fdescpl 496 205 0 192 3 0 3 3 0 8 0 filepl 152 958 0 909 2 0 2 2 0 8 0 lockfpl 104 5 0 4 1 0 1 1 0 8 0 lockfspl 48 3 0 2 1 0 1 1 0 8 0 sessionpl 144 18 0 9 1 0 1 1 0 8 0 pgrppl 48 18 0 9 1 0 1 1 0 8 0 ucredpl 96 62 0 53 1 0 1 1 0 8 0 zombiepl 144 192 0 192 2 1 1 1 0 8 1 processpl 1056 221 0 192 3 0 3 3 0 8 0 procpl 656 221 0 192 3 0 3 3 0 8 0 sockpl 400 73 0 55 2 0 2 2 0 8 0 mcl4k 4096 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 79 0 0 10 0 10 10 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 91 0 0 6 0 6 6 0 8 0 bufpl 280 1931 0 112 130 0 130 130 0 8 0 anonpl 16 19690 0 18453 8 2 6 7 0 124 0 amapchunkpl 152 527 0 490 3 1 2 3 0 158 0 amappl16 192 81 0 76 1 0 1 1 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 22 0 19 1 0 1 1 0 8 0 amappl13 168 14 0 13 2 1 1 1 0 8 0 amappl12 160 11 0 11 1 1 0 1 0 8 0 amappl11 152 50 0 35 1 0 1 1 0 8 0 amappl10 144 6 0 4 1 0 1 1 0 8 0 amappl9 136 194 0 194 2 1 1 1 0 8 1 amappl8 128 62 0 61 1 0 1 1 0 8 0 amappl7 120 213 0 210 1 0 1 1 0 8 0 amappl6 112 58 0 51 1 0 1 1 0 8 0 amappl5 104 367 0 350 1 0 1 1 0 8 0 amappl4 96 276 0 252 1 0 1 1 0 8 0 amappl3 88 103 0 96 1 0 1 1 0 8 0 amappl2 80 852 0 801 3 1 2 2 0 8 0 amappl1 72 14220 0 13799 15 5 10 15 0 8 0 amappl 80 403 0 383 1 0 1 1 0 84 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 64 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 205 0 192 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 205 0 192 1 0 1 1 0 8 0 vmmpekpl 168 5537 0 5517 2 0 2 2 0 8 0 vmmpepl 168 29927 0 29099 48 8 40 48 0 357 1 vmsppl 368 204 0 192 2 0 2 2 0 8 0 pdppl 4096 417 0 384 5 0 5 5 0 8 0 pvpl 32 80777 0 77790 32 4 28 28 0 265 1 pmappl 232 204 0 192 1 0 1 1 0 8 0 extentpl 40 57 0 39 1 0 1 1 0 8 0 phpool 112 224 0 3 7 0 7 7 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 panic(ffffffff823becb8) at panic+0x15e witness_warn(2,0,ffffffff8243f0a3) at witness_warn+0x68f userret(ffff8000ffff7720) at userret+0x337 syscall(ffff800021265670) at syscall+0x55c Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffa6c0, count: -6 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d70ff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xb7 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x2eb sched_idle(ffff800020d70ff0) at sched_idle+0x417 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020d70ff0) at x86_ipi_db+0x1a x86_ipi_handler() at x86_ipi_handler+0xb7 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x2eb sched_idle(ffff800020d70ff0) at sched_idle+0x417 end trace frame: 0x0, count: -5 ddb{1}>