kernel: protection fault trap, code=0 Stopped at witness_checkorder+0xa9: movl 0x20(%r14),%r15d ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace witness_checkorder(deafbeaddeafbfcd,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:779 mtx_enter(deafbeaddeafbfbd) at mtx_enter+0x4a sys/kern/kern_lock.c:251 prsignal(deafbeaddeafbead,14) at prsignal+0x36 sys/kern/kern_sig.c:904 reaper(ffff8000ffffc7b8) at reaper+0x2fc sys/kern/kern_exit.c:502 end trace frame: 0x0, count: -4 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a240a80 rbx 0 rdx 0 rcx 0xffff8000ffffc7b8 rax 0xffff8000299ddff0 r8 0x2 r9 0x1 r10 0x625cf1e5d67a8393 r11 0x46bd01614ab9d9cd r12 0 r13 0x1 r14 0xdeafbeaddeafbfcd r15 0x3 rip 0xffffffff8112e509 witness_checkorder+0xa9 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a2409d0 ss 0x10 witness_checkorder+0xa9: movl 0x20(%r14),%r15d ddb{1}> show proc PROC (reaper) tid=339294 pid=92901 tcnt=1 stat=onproc flags process=14000 proc=200 runpri=32, usrpri=51, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffccd8,0xffff8000ffffc538 process=0xffff8000ffff65c8 user=0xffff80002a23b000, vmspace=0xffffffff83961580 estcpu=1, cpticks=2, pctcpu=1.18, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 18313 84416 94769 32767 2 0x10 syz-executor 18313 269320 94769 32767 3 0x4000090 fsleep syz-executor 35 403054 59907 32767 2 0x10 syz-executor 35 221003 59907 32767 3 0x4000090 fsleep syz-executor 42629 73940 9955 32767 2 0x10 syz-executor 42629 301407 9955 32767 3 0x4000090 fsleep syz-executor 85276 28180 60007 32767 2 0x10 syz-executor 85276 520416 60007 32767 3 0x4000090 fsleep syz-executor 77197 154660 57544 32767 7 0x10 syz-executor 77197 230960 57544 32767 3 0x4000090 ttyin syz-executor 12796 507753 44336 32767 2 0x10 syz-executor 12796 356415 44336 32767 2 0x4000010 syz-executor 97951 246439 0 0 3 0x14200 bored sosplice 57544 57327 62348 32767 2 0xc90 syz-executor 94769 338274 4823 32767 2 0xc90 syz-executor 9955 516851 59602 32767 3 0x90 nanoslp syz-executor 44336 72961 20196 32767 3 0x90 nanoslp syz-executor 40226 484425 83113 32767 3 0x10 biowait syz-executor 60007 43867 46093 32767 3 0x90 nanoslp syz-executor 59907 506095 65431 32767 3 0x90 nanoslp syz-executor 65431 31986 12975 0 3 0x82 wait syz-executor 59602 122555 12975 0 3 0x82 wait syz-executor 46093 128396 12975 0 3 0x82 wait syz-executor 62348 94450 12975 0 3 0x82 wait syz-executor 83113 235572 12975 0 3 0x82 wait syz-executor 20196 135621 12975 0 3 0x82 wait syz-executor 4823 27837 12975 0 3 0x82 wait syz-executor 12975 518685 24336 0 3 0x82 nanoslp syz-executor 24336 265132 30760 0 3 0x10008a sigsusp ksh 30760 383417 59036 0 3 0x98 kqread sshd-session 59036 398810 11549 0 3 0x92 kqread sshd-session 24257 165150 1 0 3 0x100083 ttyin getty 11549 321096 1 0 3 0x88 kqread sshd 32220 512993 13459 73 3 0x1100090 kqread syslogd 13459 264846 1 0 3 0x100082 sbwait syslogd 77715 102607 1 0 3 0x100080 kqread resolvd 92131 130062 32688 77 3 0x100092 kqread dhcpleased 21608 456799 32688 77 3 0x100092 kqread dhcpleased 32688 183695 1 0 3 0x80 kqread dhcpleased 42274 69745 0 0 3 0x14200 bored smr 82722 106000 0 0 2 0x14200 zerothread 21491 494452 0 0 3 0x14200 aiodoned aiodoned 28546 402028 0 0 3 0x14200 syncer update 96105 440724 0 0 3 0x14200 cleaner cleaner *92901 339294 0 0 7 0x14200 reaper 18328 277862 0 0 3 0x14200 pgdaemon pagedaemon 83991 213434 0 0 3 0x14200 bored viomb 39268 170086 0 0 3 0x40014200 acpi0 acpi0 74332 364860 0 0 3 0x40014200 idle1 29380 465269 0 0 3 0x14200 bored softnet3 15753 67838 0 0 3 0x14200 bored softnet2 32795 141677 0 0 3 0x14200 bored softnet1 53302 120371 0 0 2 0x14200 softnet0 8708 208446 0 0 3 0x14200 bored systqmp 59700 43769 0 0 3 0x14200 bored systq 54495 71954 0 0 3 0x14200 tmoslp softclockmp 86322 476271 0 0 3 0x40014200 tmoslp softclock 35777 96160 0 0 3 0x40014200 idle0 1 52260 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 40226 (syz-executor) thread 0xffff80002a273208 (484425) exclusive rrwlock inode r = 0 (0xfffffd8066fecd00) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x367 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:606 #3 VOP_LOCK+0xa6 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:1230 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3109 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c6180d0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x367 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:606 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3094 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #9 Xsyscall+0x128 Process 92901 (reaper) thread 0xffff8000ffffc7b8 (339294) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83914358) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 mi_switch+0x4b7 sys/kern/sched_bsd.c:441 #3 sleep_finish+0x24f sys/kern/kern_synch.c:412 #4 rw_do_enter_write+0x1ce sys/kern/kern_rwlock.c:292 #5 knote_processexit+0x2b sys/kern/kern_event.c:2217 #6 reaper+0x27d sys/kern/kern_exit.c:499 #7 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10188 10953K 10966K 166960K 11268 0 pcb 17 12K 12K 166960K 17 0 rtable 216 6K 7K 166960K 367 0 pf 29 16K 16K 166960K 31 0 ifaddr 38 6K 7K 166960K 44 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 2 1K 9K 166960K 6 0 counters 66 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 36 0 iov 0 0K 16K 166960K 16 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1528 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 51 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 22 81K 125K 166960K 446 0 sigio 0 0K 0K 166960K 3 0 proc 61 91K 115K 166960K 503 0 subproc 63 3K 4K 166960K 171 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 36 0 in_multi 88 6K 7K 166960K 109 0 ether_multi 1 0K 0K 166960K 2 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 415 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 224 151K 182K 166960K 5466 0 UVM aobj 47 3K 3K 166960K 47 0 pinsyscall 43 86K 116K 166960K 1496 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 12 0 NDP 10 0K 2K 166960K 27 0 temp 45 8677K 8741K 166960K 5079 0 kqueue 14 20K 28K 166960K 74 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 56 0 51 1 0 1 1 0 8 0 rtentry 176 116 0 15 6 0 6 6 0 8 0 unpcb 144 356 0 341 6 3 3 6 0 8 2 syncache 336 8 0 8 1 0 1 1 0 8 1 tcpqe 32 5 0 5 1 0 1 1 0 8 1 tcpcb 808 142 0 137 4 2 2 4 0 8 1 arp 128 18 0 2 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 2 0 0 1 0 1 1 0 8 0 inpcb 384 497 0 488 8 0 8 8 0 8 6 nd6 144 29 0 6 2 0 2 2 0 8 1 kcovpl 48 19 0 12 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 476 0 50 29 0 29 29 0 8 2 art_table 32 477 0 50 4 0 4 4 0 8 0 art_node 16 115 0 23 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 8 1 0 1 1 0 8 0 semapl 112 49 0 39 1 0 1 1 0 8 0 shmpl 112 44 0 0 2 0 2 2 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1996 0 478 95 0 95 95 0 8 0 ffsino 288 1996 0 478 109 0 109 109 0 8 0 nchpl 144 2576 0 889 63 0 63 63 0 8 0 uvmvnodes 80 2176 0 0 45 0 45 45 0 8 0 vnodes 216 2176 0 0 121 0 121 121 0 8 0 namei 1024 8359 0 8358 1 0 1 1 0 8 0 percpumem 16 49 0 1 1 0 1 1 0 8 0 kstatmem 264 24 0 2 2 0 2 2 0 8 0 scxspl 216 8485 0 8484 9 5 4 8 1 8 3 plimitpl 152 119 0 96 2 0 2 2 0 8 1 sigapl 424 710 0 657 8 0 8 8 0 8 0 knotepl 120 521 0 0 16 0 16 16 0 8 0 kqueuepl 224 98 0 88 1 0 1 1 0 8 0 pipepl 336 189 0 162 6 0 6 6 0 8 3 fdescpl 520 691 0 657 4 0 4 4 0 8 1 filepl 160 3745 0 3545 18 4 14 18 0 8 5 lockfpl 104 98 0 95 1 0 1 1 0 8 0 lockfspl 48 37 0 34 1 0 1 1 0 8 0 sessionpl 144 37 0 22 1 0 1 1 0 8 0 pgrppl 48 60 0 38 1 0 1 1 0 8 0 ucredpl 104 558 0 540 1 0 1 1 0 8 0 zombiepl 144 657 0 657 1 0 1 1 0 8 1 processpl 1208 710 0 657 5 0 5 5 0 8 0 procpl 656 1158 0 1099 7 1 6 7 0 8 0 sosppl 168 5 0 5 1 0 1 1 0 8 1 sockpl 728 914 0 885 22 13 9 22 0 8 5 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 113 0 0 15 1 14 15 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 236 0 0 15 0 15 15 0 8 0 bufpl 280 2775 0 117 190 0 190 190 0 8 0 anonpl 32 7731 0 0 63 0 63 63 0 246 0 amapchunkpl 152 17359 0 16881 31 0 31 31 0 158 11 amappl16 200 2607 0 2584 19 5 14 16 0 8 10 amappl15 192 72 0 72 1 1 0 1 0 8 0 amappl14 184 134 0 124 1 0 1 1 0 8 0 amappl13 176 5 0 4 1 0 1 1 0 8 0 amappl12 168 1304 0 1270 2 0 2 2 0 8 0 amappl11 160 75 0 65 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 263 0 263 1 1 0 1 0 8 0 amappl8 136 24 0 23 1 0 1 1 0 8 0 amappl7 128 97 0 87 1 0 1 1 0 8 0 amappl6 120 180 0 177 1 0 1 1 0 8 0 amappl5 112 110 0 104 1 0 1 1 0 8 0 amappl4 104 302 0 288 1 0 1 1 0 8 0 amappl3 96 3064 0 2951 4 0 4 4 0 8 0 amappl2 88 652 0 596 2 0 2 2 0 8 0 amappl1 80 10295 0 9738 15 0 15 15 0 8 0 amappl 88 4732 0 4570 5 0 5 5 0 92 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 46 0 0 1 0 1 1 0 8 0 uaddrrnd 24 691 0 657 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 691 0 657 1 0 1 1 0 8 0 vmmpekpl 168 7816 0 7765 3 0 3 3 0 8 0 vmmpepl 168 50955 0 49000 106 1 105 106 0 357 9 vmsppl 480 690 0 657 7 2 5 6 0 8 0 rwobjpl 72 18823 0 15803 59 0 59 59 0 8 1 pdppl 4096 1389 0 1314 123 42 81 97 0 8 6 pvpl 32 15318 0 0 124 0 124 124 0 265 0 pmappl 256 690 0 657 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 415 0 48 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0