kernel: protection fault trap, code=0 Stopped at witness_checkorder+0xb5: 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(deafbeaddeafbfc5,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(deafbeaddeafbfb5) at mtx_enter+0x95 sys/kern/kern_lock.c:402 prsignal(deafbeaddeafbead,14) at prsignal+0x36 sys/kern/kern_sig.c:904 reaper(ffff8000ffffdc90) at reaper+0x2ec sys/kern/kern_exit.c:516 end trace frame: 0x0, count: -4 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a244a50 rbx 0 rdx 0 rcx 0xffff8000ffffdc90 rax 0xffff8000299edffe r8 0x7f7fffffc000 r9 0x1 r10 0xed914933a8111681 r11 0x5a276deac793f72 r12 0xdeafbeaddeafbffe r13 0x9 r14 0xdeafbeaddeafbfc5 r15 0 rip 0xffffffff81fc3b15 witness_checkorder+0xb5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a2449b0 ss 0x10 witness_checkorder+0xb5: movl 0x20(%r14),%r15d ddb{1}> show proc PROC (reaper) tid=136230 pid=76387 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=0xffff8000ffffecf8,0xffff8000ffffd770 process=0xffff8000ffffb4f0 user=0xffff80002a23f000, vmspace=0xffffffff839b71d0 estcpu=0, cpticks=9, pctcpu=0.1, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 3199 454308 13893 32767 2 0x10 syz-executor 3199 238473 13893 32767 3 0x4000090 fsleep syz-executor 72809 213799 68231 32767 2 0x10 syz-executor 72809 27639 68231 32767 7 0x4000010 syz-executor 56218 272215 53952 32767 2 0x10 syz-executor 56218 520321 53952 32767 3 0x4000090 fsleep syz-executor 59826 210069 49398 32767 2 0x10 syz-executor 59826 518299 49398 32767 2 0x4000010 syz-executor 60036 289167 99656 0 2 0x2 syz-executor 68231 412365 90981 32767 3 0x90 nanoslp syz-executor 49156 109937 88812 32767 2 0x10 syz-executor 53919 65403 72800 32767 3 0x90 nanoslp syz-executor 41086 20700 94619 32767 3 0x10 biowait syz-executor 13893 249252 53141 32767 3 0x90 nanoslp syz-executor 53952 25286 36360 32767 3 0x90 nanoslp syz-executor 49398 354213 83476 32767 3 0x90 nanoslp syz-executor 90981 492745 99656 0 3 0x82 wait syz-executor 72800 265359 99656 0 3 0x82 wait syz-executor 88812 42547 99656 0 3 0x82 wait syz-executor 53141 59362 99656 0 3 0x82 wait syz-executor 36360 260689 99656 0 3 0x82 wait syz-executor 94619 449655 99656 0 3 0x82 wait syz-executor 83476 44441 99656 0 3 0x82 wait syz-executor 99656 223578 23526 0 2 0x2 syz-executor 23526 170257 42343 0 3 0x10008a sigsusp ksh 42343 164981 21528 0 3 0x98 kqread sshd-session 21528 327748 7084 0 3 0x92 kqread sshd-session 85109 290140 1 0 3 0x100083 ttyin getty 7084 27707 1 0 3 0x88 kqread sshd 10354 508771 15231 73 3 0x1100090 kqread syslogd 15231 247086 1 0 3 0x100082 sbwait syslogd 59335 217750 1 0 3 0x100080 kqread resolvd 67731 264293 14758 77 3 0x100092 kqread dhcpleased 88372 40546 14758 77 3 0x100092 kqread dhcpleased 14758 283975 1 0 3 0x80 kqread dhcpleased 3886 281721 0 0 3 0x14200 bored smr 76731 99923 0 0 2 0x14200 zerothread 23731 400002 0 0 3 0x14200 aiodoned aiodoned 1158 207047 0 0 3 0x14200 syncer update 43378 482333 0 0 3 0x14200 cleaner cleaner *76387 136230 0 0 7 0x14200 reaper 94073 304503 0 0 3 0x14200 pgdaemon pagedaemon 66773 381274 0 0 3 0x14200 bored viomb 95142 498448 0 0 3 0x40014200 acpi0 acpi0 25282 402483 0 0 3 0x40014200 idle1 2553 469195 0 0 3 0x14200 bored softnet1 26528 418797 0 0 3 0x14200 bored softnet0 36887 84001 0 0 3 0x14200 bored systqmp 5795 195244 0 0 3 0x14200 bored systq 46064 267528 0 0 3 0x14200 tmoslp softclockmp 79549 33881 0 0 3 0x40014200 tmoslp softclock 83880 376069 0 0 3 0x40014200 idle0 1 166590 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 41086 (syz-executor) thread 0xffff8000fffefa08 (20700) exclusive rrwlock inode r = 0 (0xfffffd806618b6a0) #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:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d3378e0) #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 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #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 76387 (reaper) thread 0xffff8000ffffdc90 (136230) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839b27c8) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10185 10953K 10968K 166960K 11279 0 pcb 17 12K 12K 166960K 17 0 rtable 217 6K 7K 166960K 354 0 pf 29 16K 16K 166960K 31 0 ifaddr 38 6K 7K 166960K 44 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 6 0 counters 66 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 33 0 iov 0 0K 16K 166960K 12 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1335 84K 84K 166960K 1415 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 61 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 22 81K 129K 166960K 378 0 proc 58 99K 147K 166960K 507 0 subproc 72 4K 4K 166960K 117 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 29 0 in_multi 88 6K 7K 166960K 106 0 ether_multi 1 0K 0K 166960K 3 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 371 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 233 152K 181K 166960K 5001 0 UVM aobj 11 2K 2K 166960K 11 0 pinsyscall 43 86K 114K 166960K 1436 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 13 0 NDP 10 0K 2K 166960K 27 0 temp 48 8653K 8718K 166960K 4849 0 kqueue 14 20K 29K 166960K 51 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 52 0 49 1 0 1 1 0 8 0 rtentry 176 112 0 12 6 0 6 6 0 8 0 unpcb 144 357 0 340 5 0 5 5 0 8 4 syncache 336 9 0 9 1 0 1 1 0 8 1 tcpcb 736 259 0 255 7 0 7 7 0 8 6 arp 136 18 0 2 1 0 1 1 0 8 0 inpcb 328 390 0 382 7 0 7 7 0 8 6 nd6 152 25 0 3 1 0 1 1 0 8 0 kcovpl 48 13 0 5 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 464 0 44 29 0 29 29 0 8 1 art_table 40 465 0 44 5 0 5 5 0 8 0 art_node 32 112 0 21 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 3 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 57 0 47 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1872 0 355 95 0 95 95 0 8 0 ffsino 296 1872 0 355 117 0 117 117 0 8 0 nchpl 144 2393 0 699 63 0 63 63 0 8 0 vnodes 216 1998 0 0 111 0 111 111 0 8 0 namei 1024 7149 0 7148 2 0 2 2 0 8 1 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 8027 0 8026 6 1 5 5 1 8 4 plimitpl 152 77 0 54 2 0 2 2 0 8 1 sigapl 424 652 0 602 7 0 7 7 0 8 0 knotepl 120 365 0 0 12 0 12 12 0 8 0 kqueuepl 224 99 0 88 2 0 2 2 0 8 1 pipepl 344 148 0 121 3 0 3 3 0 8 0 fdescpl 528 636 0 602 4 0 4 4 0 8 0 filepl 160 3022 0 2810 20 2 18 20 0 8 8 lockfpl 104 64 0 62 1 0 1 1 0 8 0 lockfspl 48 24 0 22 1 0 1 1 0 8 0 sessionpl 144 29 0 14 1 0 1 1 0 8 0 pgrppl 48 49 0 26 1 0 1 1 0 8 0 ucredpl 104 327 0 309 1 0 1 1 0 8 0 zombiepl 144 603 0 602 1 0 1 1 0 8 0 processpl 1232 652 0 602 5 0 5 5 0 8 0 procpl 664 1010 0 956 7 0 7 7 0 8 1 sosppl 176 1 0 1 1 0 1 1 0 8 1 sockpl 752 804 0 776 20 9 11 20 0 8 8 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 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 130 0 0 17 0 17 17 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 260 0 0 17 0 17 17 0 8 0 bufpl 280 2584 0 119 177 0 177 177 0 8 0 anonpl 32 7756 0 0 63 0 63 63 0 246 0 amapchunkpl 152 15391 0 14902 35 0 35 35 0 158 12 amappl16 200 2214 0 2189 13 3 10 12 0 8 8 amappl15 192 32 0 32 1 1 0 1 0 8 0 amappl14 184 6 0 6 2 1 1 1 0 8 1 amappl13 176 394 0 393 1 0 1 1 0 8 0 amappl12 168 980 0 937 3 0 3 3 0 8 0 amappl11 160 13 0 13 1 1 0 1 0 8 0 amappl10 152 43 0 33 1 0 1 1 0 8 0 amappl9 144 247 0 247 1 1 0 1 0 8 0 amappl8 136 22 0 20 1 0 1 1 0 8 0 amappl7 128 76 0 75 1 0 1 1 0 8 0 amappl6 120 264 0 253 1 0 1 1 0 8 0 amappl5 112 82 0 75 1 0 1 1 0 8 0 amappl4 104 383 0 359 1 0 1 1 0 8 0 amappl3 96 2490 0 2397 3 0 3 3 0 8 0 amappl2 88 765 0 689 3 0 3 3 0 8 0 amappl1 80 10694 0 10136 15 0 15 15 0 8 0 amappl 88 4262 0 4098 5 0 5 5 0 92 0 uvmvnodes 80 1998 0 0 41 0 41 41 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 10 0 0 1 0 1 1 0 8 0 uaddrrnd 24 636 0 602 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 636 0 602 1 0 1 1 0 8 0 vmmpekpl 168 7160 0 7122 3 0 3 3 0 8 0 vmmpepl 168 48780 0 46859 103 0 103 103 0 357 7 vmsppl 488 635 0 602 7 1 6 6 0 8 0 rwobjpl 80 18333 0 15500 61 1 60 60 0 8 0 pdppl 4096 1280 0 1204 114 30 84 100 0 8 8 pvpl 32 16497 0 0 134 0 134 134 0 265 0 pmappl 256 635 0 602 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 299 0 33 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff837edff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff839b25c0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:138 [inline] __mp_lock(ffffffff839b25c0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:169 intr_handler(ffff80003c4434d0,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x95 kd_claim sys/dev/kcov.c:632 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x95 sys/dev/kcov.c:157 __mp_lock(ffffffff839b25c0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:138 [inline] __mp_lock(ffffffff839b25c0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:169 doopenat(ffff80003bc2ba20,ffffff9c,200000000000,162,0,ffff80003c443840) at doopenat+0x345 sys/kern/vfs_syscalls.c:1138 syscall(ffff80003c4438f0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4438f0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x18d96b0ba0, count: -12 ddb{0}> machine ddbcpu 1 Stopped at witness_checkorder+0xb5: movl 0x20(%r14),%r15d ddb{1}> trace witness_checkorder(deafbeaddeafbfc5,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(deafbeaddeafbfb5) at mtx_enter+0x95 sys/kern/kern_lock.c:402 prsignal(deafbeaddeafbead,14) at prsignal+0x36 sys/kern/kern_sig.c:904 reaper(ffff8000ffffdc90) at reaper+0x2ec sys/kern/kern_exit.c:516 end trace frame: 0x0, count: -4