kernel: protection fault trap, code=0 Stopped at witness_checkorder+0xb5: movl 0x20(%r14),%r15d ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace witness_checkorder(deaf4152deaf426a,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(deaf4152deaf425a) at mtx_enter+0x95 sys/kern/kern_lock.c:406 prsignal(deaf4152deaf4152,14) at prsignal+0x36 sys/kern/kern_sig.c:904 reaper(ffff8000ffffcd00) at reaper+0x2ec sys/kern/kern_exit.c:516 end trace frame: 0x0, count: -4 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a1f41c0 rbx 0 rdx 0 rcx 0xffff8000ffffcd00 rax 0xffffffff83979ffe cpu_info_full_primary+0x1ffe r8 0xffffffffffffffff r9 0 r10 0xa6c8281168007e61 r11 0xc78cbdc9b5546b62 r12 0xdeaf4152deaf42fe r13 0x9 r14 0xdeaf4152deaf426a r15 0 rip 0xffffffff831d6d15 witness_checkorder+0xb5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a1f4120 ss 0x10 witness_checkorder+0xb5: movl 0x20(%r14),%r15d ddb{0}> show proc PROC (reaper) tid=490973 pid=84701 tcnt=1 stat=onproc flags process=14000 proc=200 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffff758,0xffff8000ffffca78 process=0xffff8000ffffb020 user=0xffff80002a1ef000, vmspace=0xffffffff83b11b38 estcpu=0, cpticks=8, pctcpu=0.1, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 83082 291564 64129 32767 2 0x10 syz-executor 12662 330555 58092 32767 2 0x10 syz-executor 12662 451155 58092 32767 3 0x4000090 fsleep syz-executor 23008 102577 22776 32767 2 0x10 syz-executor 23008 334589 22776 32767 2 0x4000010 syz-executor 11600 243670 18419 32767 2 0x10 syz-executor 96347 246070 58559 32767 3 0x90 nanoslp syz-executor 24446 40880 94333 32767 2 0x10 syz-executor 38368 371572 63081 32767 3 0x90 nanoslp syz-executor 64129 21178 71919 32767 3 0x90 nanoslp syz-executor 31719 367950 11692 32767 2 0x10 syz-executor 22776 135872 93358 32767 3 0x90 nanoslp syz-executor 58092 68984 29135 32767 3 0x90 nanoslp syz-executor 18419 69270 93474 0 3 0x82 wait syz-executor 63081 362485 93474 0 3 0x82 wait syz-executor 58559 156612 93474 0 3 0x82 wait syz-executor 71919 234021 93474 0 3 0x82 wait syz-executor 94333 485957 93474 0 3 0x82 wait syz-executor 93358 276423 93474 0 3 0x82 wait syz-executor 11692 362433 93474 0 3 0x82 wait syz-executor 29135 102027 93474 0 3 0x82 wait syz-executor 93474 73027 19286 0 3 0x82 kqread syz-executor 19286 224897 25076 0 3 0x10008a sigsusp ksh 25076 458464 28841 0 3 0x98 kqread sshd-session 28841 288937 81141 0 3 0x92 kqread sshd-session 63899 129141 1 0 3 0x100083 ttyin getty 81141 246497 1 0 3 0x88 kqread sshd 45302 277906 49980 73 3 0x1100090 kqread syslogd 49980 470677 1 0 3 0x100082 sbwait syslogd 73017 463631 1 0 3 0x100080 kqread resolvd 8945 236315 27710 77 3 0x100092 kqread dhcpleased 2558 343295 27710 77 3 0x100092 kqread dhcpleased 27710 516872 1 0 3 0x80 kqread dhcpleased 50110 478670 0 0 3 0x14200 bored smr 55914 486476 0 0 2 0x14200 zerothread 78129 468852 0 0 3 0x14200 aiodoned aiodoned 55470 133271 0 0 3 0x14200 syncer update 61923 465831 0 0 3 0x14200 cleaner cleaner *84701 490973 0 0 7 0x14200 reaper 78634 137390 0 0 3 0x14200 pgdaemon pagedaemon 81046 119483 0 0 3 0x14200 bored viomb 27181 405974 0 0 3 0x40014200 acpi0 acpi0 12094 19571 0 0 3 0x40014200 idle1 3177 255055 0 0 3 0x14200 bored softnet1 3327 255178 0 0 3 0x14200 bored softnet0 18090 162490 0 0 3 0x14200 bored systqmp 35956 249315 0 0 3 0x14200 bored systq 94422 271498 0 0 3 0x14200 tmoslp softclockmp 46450 306905 0 0 3 0x40014200 tmoslp softclock 49073 297259 0 0 3 0x40014200 idle0 1 403989 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 11600 (syz-executor) thread 0xffff80003a3b2a80 (243670) exclusive rrwlock inode r = 0 (0xfffff580685ebb28) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3062 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffff5806d2580b8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3047 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 Process 24446 (syz-executor) thread 0xffff8000fffef4d8 (40880) exclusive rrwlock inode r = 0 (0xfffff580685eb0c0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vget+0x2a2 sys/kern/vfs_subr.c:686 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580 #11 namei+0x7c5 sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1806 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffff5806cc7a428) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1806 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 Process 31719 (syz-executor) thread 0xffff8000fffeea78 (367950) exclusive rrwlock inode r = 0 (0xfffff580685eb688) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vget+0x2a2 sys/kern/vfs_subr.c:686 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580 #11 namei+0x7c5 sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1806 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffff5806cc7a8c8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1806 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 Process 84701 (reaper) thread 0xffff8000ffffcd00 (490973) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83b0c040) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 sleep_finish+0x2d8 sys/kern/kern_synch.c:369 #3 rw_do_enter_write+0x1dc sys/kern/kern_rwlock.c:298 #4 knote_processexit+0x2b sys/kern/kern_event.c:2235 #5 reaper+0x26d sys/kern/kern_exit.c:513 #6 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11051 12018K 12034K 166960K 12142 0 pcb 17 12K 12K 166960K 17 0 rtable 237 6K 7K 166960K 350 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 6 0 counters 70 37K 37K 166960K 70 0 ioctlops 0 0K 2K 166960K 31 0 iov 0 0K 8K 166960K 2 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1287 81K 81K 166960K 1361 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 7 0K 0K 166960K 7 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 22 81K 125K 166960K 226 0 sigio 0 0K 0K 166960K 2 0 proc 58 99K 147K 166960K 511 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 15 0 in_multi 99 7K 7K 166960K 99 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 425 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 229 183K 192K 166960K 3661 0 UVM aobj 7 2K 2K 166960K 7 0 pinsyscall 43 86K 110K 166960K 1296 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 2 0 NDP 11 0K 2K 166960K 27 0 temp 38 9114K 9130K 166960K 3791 0 kqueue 13 20K 32K 166960K 46 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 39 0 36 1 0 1 1 0 8 0 rtentry 176 111 0 1 5 0 5 5 0 8 0 unpcb 144 169 0 154 5 0 5 5 0 8 4 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 37 0 33 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 192 0 184 7 0 7 7 0 8 6 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 3 0 0 1 0 1 1 0 8 0 nd6 152 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 0 29 0 29 29 0 8 0 art_table 40 453 0 0 5 0 5 5 0 8 0 art_node 32 111 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 72 5 0 0 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1670 0 209 92 0 92 92 0 8 0 ffsino 296 1670 0 209 113 0 113 113 0 8 0 nchpl 144 1980 0 293 63 0 63 63 0 8 0 vnodes 216 1751 0 0 98 0 98 98 0 8 0 namei 1024 6089 0 6088 2 0 2 2 0 8 1 percpumem 16 50 0 0 1 0 1 1 0 8 0 kstatmem 264 25 0 0 2 0 2 2 0 8 0 scxspl 216 6701 0 6701 4 3 1 3 1 8 1 plimitpl 152 81 0 56 2 0 2 2 0 8 1 sigapl 424 515 0 464 7 0 7 7 0 8 0 knotepl 120 101 0 0 4 0 4 4 0 8 0 kqueuepl 224 80 0 70 3 0 3 3 0 8 2 pipepl 344 125 0 98 3 0 3 3 0 8 0 fdescpl 528 499 0 465 4 0 4 4 0 8 0 filepl 160 2103 0 1895 15 0 15 15 0 8 5 lockfpl 104 26 0 24 1 0 1 1 0 8 0 lockfspl 48 14 0 12 1 0 1 1 0 8 0 sessionpl 144 28 0 12 1 0 1 1 0 8 0 pgrppl 48 36 0 12 1 0 1 1 0 8 0 ucredpl 104 239 0 220 1 0 1 1 0 8 0 zombiepl 144 466 0 464 1 0 1 1 0 8 0 processpl 1232 515 0 464 5 0 5 5 0 8 0 procpl 664 658 0 604 6 0 6 6 0 8 0 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 752 401 0 375 14 0 14 14 0 8 10 mcl64k 65536 16 0 0 2 0 2 2 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 121 0 0 16 0 16 16 0 8 0 mcl2k 2048 14 0 0 2 0 2 2 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 369 0 0 24 0 24 24 0 8 0 bufpl 272 2377 0 102 152 0 152 152 0 8 0 anonpl 32 5102 0 0 42 0 42 42 0 246 0 amapchunkpl 152 10424 0 9959 24 0 24 24 0 158 1 amappl16 200 1694 0 1674 5 0 5 5 0 8 3 amappl15 192 7 0 7 1 0 1 1 0 8 1 amappl14 184 402 0 400 1 0 1 1 0 8 0 amappl13 176 114 0 104 1 0 1 1 0 8 0 amappl12 168 750 0 717 2 0 2 2 0 8 0 amappl11 160 8 0 8 2 2 0 1 0 8 0 amappl10 152 72 0 62 1 0 1 1 0 8 0 amappl9 144 269 0 269 1 0 1 1 0 8 1 amappl8 136 93 0 92 1 0 1 1 0 8 0 amappl7 128 136 0 125 1 0 1 1 0 8 0 amappl6 120 168 0 167 1 0 1 1 0 8 0 amappl5 112 92 0 85 1 0 1 1 0 8 0 amappl4 104 260 0 246 1 0 1 1 0 8 0 amappl3 96 1896 0 1786 5 1 4 4 0 8 0 amappl2 88 500 0 447 2 0 2 2 0 8 0 amappl1 80 10303 0 9739 14 0 14 14 0 8 0 amappl 88 2981 0 2819 5 0 5 5 0 92 0 uvmvnodes 80 100 0 0 3 0 3 3 0 8 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 72 6 0 0 1 0 1 1 0 8 0 uaddrrnd 24 499 0 465 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 499 0 465 1 0 1 1 0 8 0 vmmpekpl 168 5897 0 5862 2 0 2 2 0 8 0 vmmpepl 168 40467 0 38578 94 0 94 94 0 357 3 vmsppl 488 498 0 464 7 1 6 6 0 8 0 rwobjpl 80 14619 0 13708 23 1 22 23 0 8 0 pdppl 4096 1005 0 928 107 22 85 97 0 8 8 pvpl 32 10904 0 0 88 0 88 88 0 265 0 pmappl 256 498 0 464 4 1 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 441 0 25 13 0 13 13 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace witness_checkorder(deaf4152deaf426a,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(deaf4152deaf425a) at mtx_enter+0x95 sys/kern/kern_lock.c:406 prsignal(deaf4152deaf4152,14) at prsignal+0x36 sys/kern/kern_sig.c:904 reaper(ffff8000ffffcd00) at reaper+0x2ec sys/kern/kern_exit.c:516 end trace frame: 0x0, count: -4 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff80002999dff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff83b0b840) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83b0b840) at __mp_lock+0x192 sys/kern/kern_lock.c:173 exit1(ffff80003a3b3248,b,0,1) at exit1+0x701 sys/kern/kern_exit.c:260 sys_exit(ffff80003a3b3248,ffff80003bbb9510,ffff80003bbb9460) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003bbb9510) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bbb9510) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7171347eb700, count: -8