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(ffff8000ffffd760) at reaper+0x2ec sys/kern/kern_exit.c:516 end trace frame: 0x0, count: -4 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a244ce0 rbx 0 rdx 0 rcx 0xffff8000ffffd760 rax 0xffffffff83886ffe cpu_info_full_primary+0x1ffe r8 0x7f7fffffc000 r9 0 r10 0x6239a7991d65f7be r11 0x30ea46d2a78686ab r12 0xdeaf4152deaf42fe r13 0x9 r14 0xdeaf4152deaf426a r15 0 rip 0xffffffff82337fb5 witness_checkorder+0xb5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a244c40 ss 0x10 witness_checkorder+0xb5: movl 0x20(%r14),%r15d ddb{0}> show proc PROC (reaper) tid=436961 pid=25186 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=0xffff8000fffff9f0,0xffff8000ffffd4d8 process=0xffff8000ffffb9c0 user=0xffff80002a23f000, vmspace=0xffffffff8394ca20 estcpu=0, cpticks=6, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 86421 136437 74889 32767 2 0x10 syz-executor 86421 61232 74889 32767 3 0x4000090 lockf syz-executor 51138 375099 96962 32767 2 0x10 syz-executor 51138 373786 96962 32767 3 0x4000090 kqread syz-executor 51138 131342 96962 32767 3 0x4000090 kqread syz-executor 99413 439291 92852 32767 3 0x90 nanoslp syz-executor 99413 131652 92852 32767 3 0x4000090 fsleep syz-executor 99413 369952 92852 32767 3 0x4000090 fsleep syz-executor 77181 415943 82878 32767 2 0x10 syz-executor 77181 234452 82878 32767 3 0x4000090 msgwait syz-executor 77181 509861 82878 32767 3 0x4000090 fsleep syz-executor 5976 8849 20358 32767 3 0x90 nanoslp syz-executor 5976 291410 20358 32767 3 0x4000090 kqread syz-executor 5976 117199 20358 32767 3 0x4000090 fsleep syz-executor 22570 86296 54829 32767 3 0x90 nanoslp syz-executor 22570 365446 54829 32767 3 0x4000090 kqsel syz-executor 22570 100833 54829 32767 3 0x4000090 fsleep syz-executor 22570 351647 54829 32767 3 0x4000090 fsleep syz-executor 61042 514072 27630 32767 3 0x90 nanoslp syz-executor 61042 470807 27630 32767 3 0x4000090 fifor syz-executor 61042 68038 27630 32767 3 0x4000090 msgwait syz-executor 61042 439339 27630 32767 3 0x4000090 fsleep syz-executor 31270 92495 67447 32767 7 0x10 syz-executor 20358 79028 61602 32767 3 0x90 nanoslp syz-executor 92852 428563 36000 32767 3 0x90 nanoslp syz-executor 54829 417809 45623 32767 3 0x90 nanoslp syz-executor 74889 301700 87475 32767 3 0x90 nanoslp syz-executor 82878 270934 14777 32767 3 0x90 nanoslp syz-executor 27630 502594 40858 32767 2 0x10 syz-executor 96962 486836 95318 32767 3 0x90 nanoslp syz-executor 45623 454544 99887 0 3 0x82 wait syz-executor 40858 513420 99887 0 3 0x82 wait syz-executor 14777 241065 99887 0 3 0x82 wait syz-executor 61602 343505 99887 0 3 0x82 wait syz-executor 95318 26980 99887 0 3 0x82 wait syz-executor 67447 72591 99887 0 3 0x82 wait syz-executor 87475 380009 99887 0 3 0x82 wait syz-executor 36000 232629 99887 0 3 0x82 wait syz-executor 99887 199951 97774 0 3 0x82 kqread syz-executor 97774 508400 23619 0 3 0x10008a sigsusp ksh 23619 40396 96515 0 3 0x98 kqread sshd-session 96515 398799 25984 0 3 0x92 kqread sshd-session 52480 148512 1 0 3 0x100083 ttyin getty 25984 210087 1 0 3 0x88 kqread sshd 57611 210515 17592 73 3 0x1100090 kqread syslogd 17592 340273 1 0 3 0x100082 sbwait syslogd 82806 497790 1 0 3 0x100080 kqread resolvd 67961 153765 86052 77 3 0x100092 kqread dhcpleased 71813 324379 86052 77 3 0x100092 kqread dhcpleased 86052 310411 1 0 3 0x80 kqread dhcpleased 33207 332683 0 0 3 0x14200 bored smr 39913 405042 0 0 2 0x14200 zerothread 58094 281571 0 0 3 0x14200 aiodoned aiodoned 20288 219621 0 0 3 0x14200 syncer update 70438 484338 0 0 3 0x14200 cleaner cleaner *25186 436961 0 0 7 0x14200 reaper 95172 482444 0 0 3 0x14200 pgdaemon pagedaemon 51446 230433 0 0 3 0x14200 bored viomb 43129 492534 0 0 3 0x40014200 acpi0 acpi0 28400 442207 0 0 3 0x40014200 idle1 75666 367675 0 0 3 0x14200 bored softnet1 82477 351591 0 0 3 0x14200 bored softnet0 9272 301063 0 0 3 0x14200 bored systqmp 38573 61168 0 0 3 0x14200 bored systq 94599 57362 0 0 3 0x14200 tmoslp softclockmp 5394 391200 0 0 3 0x40014200 tmoslp softclock 65382 454231 0 0 3 0x40014200 idle0 1 164616 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 31270 (syz-executor) thread 0xffff8000fffe6fb0 (92495) exclusive rrwlock inode r = 0 (0xfffffd806c43dec0) #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:570 #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+0x93a sys/kern/vfs_lookup.c:566 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d544568) #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:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #9 Xsyscall+0x128 Process 25186 (reaper) thread 0xffff8000ffffd760 (436961) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839282c8) #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:367 #3 rw_do_enter_write+0x1dc sys/kern/kern_rwlock.c:298 #4 knote_processexit+0x2b sys/kern/kern_event.c:2217 #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 10185 10955K 10968K 166960K 11276 0 pcb 17 12K 12K 166960K 17 0 rtable 239 6K 7K 166960K 359 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 5 0 counters 68 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 29 0 iov 0 0K 4K 166960K 3 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1336 84K 84K 166960K 1365 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 10 0K 0K 166960K 11 0 dirhash 12 2K 3K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 25 93K 121K 166960K 215 0 sigio 0 0K 0K 166960K 1 0 proc 58 99K 163K 166960K 487 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 22 0 in_multi 99 7K 7K 166960K 109 0 ether_multi 1 0K 0K 166960K 3 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 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 361 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 278 176K 190K 166960K 3789 0 UVM aobj 8 2K 3K 166960K 9 0 pinsyscall 46 92K 108K 166960K 1293 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 3 0 NDP 11 0K 1K 166960K 27 0 temp 39 8647K 8711K 166960K 4195 0 kqueue 19 30K 30K 166960K 42 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 43 0 40 1 0 1 1 0 8 0 rtentry 176 112 0 1 6 0 6 6 0 8 0 unpcb 144 87 0 68 2 0 2 2 0 8 1 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 62 0 57 4 0 4 4 0 8 3 arp 136 18 0 0 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 328 148 0 138 4 0 4 4 0 8 2 nd6 152 25 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 256 455 0 0 29 0 29 29 0 8 0 art_table 40 456 0 0 5 0 5 5 0 8 0 art_node 32 112 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 1 1 0 1 1 0 8 0 semapl 112 9 0 1 1 0 1 1 0 8 0 shmpl 112 6 0 1 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 1671 0 163 96 0 96 96 0 8 0 ffsino 296 1671 0 163 117 0 117 117 0 8 0 nchpl 144 1953 0 264 63 0 63 63 0 8 0 vnodes 216 1752 0 0 98 0 98 98 0 8 0 namei 1024 5763 0 5763 2 0 2 2 0 8 2 percpumem 16 49 0 0 1 0 1 1 0 8 0 kstatmem 264 24 0 0 2 0 2 2 0 8 0 scxspl 216 6299 0 6299 3 2 1 2 1 8 1 plimitpl 152 47 0 23 2 0 2 2 0 8 1 sigapl 424 506 0 453 7 0 7 7 0 8 0 knotepl 120 348 0 0 11 0 11 11 0 8 0 kqueuepl 224 41 0 25 1 0 1 1 0 8 0 pipepl 344 116 0 89 3 0 3 3 0 8 0 fdescpl 528 490 0 453 3 0 3 3 0 8 0 filepl 160 1783 0 1567 11 0 11 11 0 8 1 lockfpl 104 15 0 11 1 0 1 1 0 8 0 lockfspl 48 8 0 5 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 34 0 10 1 0 1 1 0 8 0 ucredpl 104 171 0 152 1 0 1 1 0 8 0 zombiepl 144 453 0 453 1 0 1 1 0 8 1 processpl 1232 506 0 453 5 0 5 5 0 8 0 procpl 664 636 0 568 6 0 6 6 0 8 0 sockpl 752 280 0 248 7 0 7 7 0 8 3 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 7 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 116 0 0 15 0 15 15 0 8 0 mcl2k 2048 17 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 179 0 0 12 0 12 12 0 8 0 bufpl 280 2372 0 119 161 0 161 161 0 8 0 anonpl 32 7237 0 0 60 1 59 59 0 246 0 amapchunkpl 152 11303 0 10690 28 0 28 28 0 158 0 amappl16 200 2360 0 2338 14 0 14 14 0 8 11 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 83 0 83 1 1 0 1 0 8 0 amappl13 176 404 0 403 1 0 1 1 0 8 0 amappl12 168 829 0 783 3 0 3 3 0 8 0 amappl11 160 11 0 10 1 0 1 1 0 8 0 amappl10 152 44 0 34 1 0 1 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 22 0 21 1 0 1 1 0 8 0 amappl7 128 74 0 73 1 0 1 1 0 8 0 amappl6 120 305 0 293 1 0 1 1 0 8 0 amappl5 112 76 0 68 1 0 1 1 0 8 0 amappl4 104 387 0 364 1 0 1 1 0 8 0 amappl3 96 1667 0 1555 3 0 3 3 0 8 0 amappl2 88 616 0 539 2 0 2 2 0 8 0 amappl1 80 9591 0 9026 14 0 14 14 0 8 0 amappl 88 3069 0 2862 5 0 5 5 0 92 0 uvmvnodes 80 99 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 8 0 1 1 0 1 1 0 8 0 uaddrrnd 24 490 0 453 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 490 0 453 1 0 1 1 0 8 0 vmmpekpl 168 5741 0 5712 2 0 2 2 0 8 0 vmmpepl 168 40010 0 37937 102 0 102 102 0 357 7 vmsppl 488 489 0 453 7 1 6 6 0 8 0 rwobjpl 80 14783 0 13812 25 0 25 25 0 8 1 pdppl 4096 987 0 906 111 26 85 95 0 8 4 pvpl 32 14228 0 0 116 1 115 115 0 265 0 pmappl 256 489 0 453 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 287 0 29 8 0 8 8 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(ffff8000ffffd760) 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(ffff8000299edff0) 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(ffffffff839280c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839280c0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 __mp_acquire_count(ffffffff839280c0,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:367 biowait(fffffd806c93c460) at biowait+0xc6 sys/kern/vfs_bio.c:1242 bwrite(fffffd806c93c460) at bwrite+0x2e7 sys/kern/vfs_bio.c:754 ufs_dirremove(fffffd806c97f8a8,fffffd806c43de20,800c,1) at ufs_dirremove+0x290 sys/ufs/ufs/ufs_lookup.c:919 ufs_rmdir(ffff80003c4149c0) at ufs_rmdir+0x238 sys/ufs/ufs/ufs_vnops.c:1248 VOP_RMDIR(fffffd806c97f8a8,fffffd806c2a7da8,ffff80003c414a98) at VOP_RMDIR+0x192 sys/kern/vfs_vops.c:413 dounlinkat(ffff8000fffe6fb0,ffffff9c,74bb67973060,8) at dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1901 syscall(ffff80003c414c10) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c414c10) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74bb67973050, count: -14