kernel: protection fault trap, code=0 Stopped at witness_checkorder+0xa9: movl 0x18(%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(dead4110dead4230,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:775 mtx_enter(dead4110dead4220) at mtx_enter+0x47 sys/kern/kern_lock.c:238 prsignal(dead4110dead4110,14) at prsignal+0x36 sys/kern/kern_sig.c:909 reaper(ffff8000ffffd718) at reaper+0x32c sys/kern/kern_exit.c:489 end trace frame: 0x0, count: -4 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a302b50 rbx 0 rdx 0 rcx 0xffff8000ffffd718 rax 0xffff800029a9bff0 r8 0x800000 acpi_pdirpa+0x7ebe71 r9 0x1 r10 0xc76a0216e2babc7c r11 0x4d3c4b986452ca52 r12 0 r13 0x1 r14 0xdead4110dead4230 r15 0x3 rip 0xffffffff8228d009 witness_checkorder+0xa9 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a302aa0 ss 0x10 witness_checkorder+0xa9: movl 0x18(%r14),%r15d ddb{1}> show proc PROC (reaper) tid=488109 pid=48480 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=0xffff8000ffffd9a8,0xffff8000ffffd498 process=0xffff80002a3066c8 user=0xffff80002a2fd000, vmspace=0xffffffff83913800 estcpu=1, cpticks=1, pctcpu=0.46, user=0, sys=77, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 52082 77106 20674 0 2 0 syz-executor 67087 410109 0 0 3 0x14280 nfsidl nfsio 94461 158567 0 0 3 0x14280 nfsidl nfsio 80993 508200 0 0 3 0x14280 nfsidl nfsio 26034 414483 0 0 3 0x14280 nfsidl nfsio 22235 499469 0 0 3 0x14280 nfsidl nfsio 1590 210432 0 0 3 0x14280 nfsidl nfsio 24800 353886 0 0 3 0x14280 nfsidl nfsio 62165 327492 0 0 3 0x14280 nfsidl nfsio 12960 44448 0 0 3 0x14280 nfsidl nfsio 41754 157525 0 0 3 0x14280 nfsidl nfsio 82879 237077 0 0 3 0x14280 nfsidl nfsio 72033 110035 0 0 3 0x14280 nfsidl nfsio 78259 151659 0 0 3 0x14280 nfsidl nfsio 75664 291832 0 0 3 0x14280 nfsidl nfsio 19409 440754 0 0 3 0x14280 nfsidl nfsio 23058 379063 0 0 3 0x14280 nfsidl nfsio 54970 187381 27270 0 2 0 syz-executor 54970 396887 27270 0 3 0x4000080 lockf syz-executor 54970 354106 27270 0 3 0x4000080 fsleep syz-executor 54970 281685 27270 0 3 0x4000080 fsleep syz-executor 38602 110341 26306 0 2 0 syz-executor 38602 284777 26306 0 3 0x4000080 fsleep syz-executor 38602 215289 26306 0 3 0x4000080 fsleep syz-executor 52280 504544 55448 0 2 0 syz-executor 52280 217617 55448 0 2 0x4000000 syz-executor 20461 38587 0 0 3 0x14200 acct acct 96009 61676 0 0 3 0x14200 bored sosplice 55448 499903 76213 0 3 0x82 nanoslp syz-executor 17764 517668 76213 0 3 0x2 biowait syz-executor 20674 358200 76213 0 7 0x3 syz-executor 27270 310724 76213 0 3 0x82 nanoslp syz-executor 15060 123906 76213 0 2 0x3 syz-executor 34214 100574 76213 0 3 0x82 nanoslp syz-executor 26306 265908 76213 0 3 0x82 nanoslp syz-executor 30345 424855 76213 0 3 0x82 nanoslp syz-executor 76213 495861 77544 0 2 0x3 syz-executor 77544 176647 52219 0 3 0x10008a sigsusp ksh 52219 255804 95723 0 3 0x98 kqread sshd-session 95723 125315 28162 0 3 0x92 kqread sshd-session 17568 43713 1 0 3 0x100083 ttyin getty 28162 171331 1 0 3 0x88 kqread sshd 66122 379506 49999 74 3 0x1100092 bpf pflogd 49999 244838 1 0 3 0x80 sbwait pflogd 10433 438118 20986 73 3 0x1100090 kqread syslogd 20986 314525 1 0 3 0x100082 sbwait syslogd 16304 490334 1 0 3 0x100080 kqread resolvd 49115 346063 78904 77 3 0x100092 kqread dhcpleased 62666 353485 78904 77 3 0x100092 kqread dhcpleased 78904 341759 1 0 3 0x80 kqread dhcpleased 58587 142846 0 0 3 0x14200 bored smr 8919 165724 0 0 2 0x14200 zerothread 73591 87007 0 0 3 0x14200 aiodoned aiodoned 11155 493760 0 0 3 0x14200 syncer update 85985 251817 0 0 3 0x14200 cleaner cleaner *48480 488109 0 0 7 0x14200 reaper 23427 498359 0 0 3 0x14200 pgdaemon pagedaemon 5005 69498 0 0 3 0x14200 bored viomb 34535 216465 0 0 3 0x40014200 acpi0 acpi0 76381 280523 0 0 3 0x40014200 idle1 56209 129750 0 0 3 0x14200 bored softnet3 46606 124961 0 0 3 0x14200 bored softnet2 43761 423087 0 0 3 0x14200 bored softnet1 25108 54036 0 0 2 0x14200 softnet0 44708 61107 0 0 3 0x14200 bored systqmp 96715 225496 0 0 3 0x14200 bored systq 90710 133062 0 0 3 0x14200 tmoslp softclockmp 87032 113909 0 0 3 0x40014200 tmoslp softclock 17129 337753 0 0 3 0x40014200 idle0 1 190307 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 52280 (syz-executor) thread 0xffff80003b4cca68 (217617) exclusive rwlock sysctllk r = 0 (0xffffffff83853108) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 sysctl_vslock+0x45 sys/kern/kern_sysctl.c:185 #3 sys_sysctl+0x398 sys/kern/kern_sysctl.c:297 #4 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 Process 17764 (syz-executor) thread 0xffff8000ffffd1f8 (517668) exclusive rrwlock inode r = 0 (0xfffffd8069d12658) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #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:3102 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cc8e650) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #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:3087 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 48480 (reaper) thread 0xffff8000ffffd718 (488109) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838e3ee0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 __mp_acquire_count+0x58 #2 mi_switch+0x4b7 sys/kern/sched_bsd.c:441 #3 sleep_finish+0x24f sys/kern/kern_synch.c:414 #4 rw_do_enter_write+0x1de sys/kern/kern_rwlock.c:292 #5 knote_processexit+0x2b sys/kern/kern_event.c:2063 #6 reaper+0x2ad sys/kern/kern_exit.c:486 #7 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10203 11049K 11346K 166960K 11490 0 pcb 18 12K 12K 166960K 57 0 rtable 237 7K 8K 166960K 373 0 pf 35 17K 21K 166960K 62 0 ifaddr 43 7K 7K 166960K 54 0 ifgroup 55 2K 2K 166960K 67 0 sysctl 2 1K 1K 166960K 2 0 counters 64 36K 36K 166960K 78 0 ioctlops 0 0K 4K 166960K 1568 0 iov 0 0K 12K 166960K 20 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1364 86K 86K 166960K 1490 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 14 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 93K 166960K 335 0 sigio 0 0K 0K 166960K 4 0 proc 72 91K 140K 166960K 549 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 26 0 in_multi 98 7K 7K 166960K 101 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 454 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 220 72K 77K 166960K 4661 0 UVM aobj 13 2K 2K 166960K 18 0 pinsyscall 41 82K 104K 166960K 1423 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 19 0 NDP 12 0K 1K 166960K 34 0 temp 78 8644K 8716K 166960K 16921 0 kqueue 16 24K 26K 166960K 49 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 42 0 39 1 0 1 1 0 8 0 rtentry 112 119 0 10 4 0 4 4 0 8 0 unpcb 144 265 0 241 4 0 4 4 0 8 3 syncache 336 5 0 5 1 1 0 1 0 8 0 tcpcb 808 103 0 99 4 3 1 4 0 8 0 arp 120 20 0 3 1 0 1 1 0 8 0 inpcb 376 337 0 328 11 3 8 8 0 8 7 nd6 136 26 0 0 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 7 0 7 1 1 0 1 0 8 0 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 1 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 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 29 0 0 1 0 1 1 0 8 0 pfstkey 128 29 0 0 1 0 1 1 0 8 0 pfstate 376 29 0 0 3 0 3 3 0 8 0 pfrule 1344 88 0 82 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 458 0 5 29 0 29 29 0 8 0 art_table 32 459 0 5 4 0 4 4 0 8 0 art_node 16 117 0 18 1 0 1 1 0 8 0 semapl 112 12 0 2 1 0 1 1 0 8 0 shmpl 112 15 0 5 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 1920 0 408 95 0 95 95 0 8 0 ffsino 280 1920 0 408 109 0 109 109 0 8 0 nchpl 144 2392 0 703 63 0 63 63 0 8 0 uvmvnodes 80 2094 0 0 43 0 43 43 0 8 0 vnodes 216 2094 0 0 117 0 117 117 0 8 0 namei 1024 8246 0 8245 1 0 1 1 0 8 0 percpumem 16 53 0 7 1 0 1 1 0 8 0 kstatmem 264 36 0 12 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 7566 0 7564 3 2 1 2 1 8 0 plimitpl 152 54 0 36 1 0 1 1 0 8 0 sigapl 424 654 0 588 9 1 8 8 0 8 0 futexpl 64 3173 0 3169 1 0 1 1 0 8 0 knotepl 120 80 0 0 3 0 3 3 0 8 0 kqueuepl 216 77 0 65 1 0 1 1 0 8 0 pipepl 328 120 0 92 3 0 3 3 0 8 0 fdescpl 504 617 0 587 5 0 5 5 0 8 0 filepl 152 3018 0 2780 16 1 15 15 0 8 4 lockfpl 104 76 0 72 1 0 1 1 0 8 0 lockfspl 48 35 0 32 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 33 0 16 1 0 1 1 0 8 0 ucredpl 104 325 0 310 1 0 1 1 0 8 0 zombiepl 144 595 0 593 1 0 1 1 0 8 0 processpl 1168 654 0 588 6 1 5 5 0 8 0 procpl 656 1003 0 931 7 0 7 7 0 8 0 sockpl 688 648 0 612 19 3 16 16 0 8 12 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 123 0 0 16 0 16 16 0 8 0 mcl2k 2048 24 0 0 3 0 3 3 0 8 0 mtagpl 96 12 0 0 1 0 1 1 0 8 0 mbufpl 256 222 0 0 14 0 14 14 0 8 0 bufpl 280 2688 0 126 183 0 183 183 0 8 0 anonpl 24 116314 0 112959 49 26 23 46 0 184 0 amapchunkpl 152 14327 0 13855 24 1 23 23 0 158 0 amappl16 200 2246 0 2219 18 16 2 15 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 116 0 104 1 0 1 1 0 8 0 amappl13 176 9 0 8 1 0 1 1 0 8 0 amappl12 168 1259 0 1229 4 1 3 3 0 8 0 amappl11 160 80 0 66 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 107 0 94 1 0 1 1 0 8 0 amappl6 120 179 0 175 1 0 1 1 0 8 0 amappl5 112 127 0 117 1 0 1 1 0 8 0 amappl4 104 318 0 298 1 0 1 1 0 8 0 amappl3 96 2661 0 2553 4 0 4 4 0 8 0 amappl2 88 722 0 660 2 0 2 2 0 8 0 amappl1 80 8789 0 8219 14 0 14 14 0 8 0 amappl 88 4272 0 4108 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 17 0 5 1 0 1 1 0 8 0 uaddrrnd 24 617 0 587 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 617 0 587 1 0 1 1 0 8 0 vmmpekpl 168 6880 0 6839 2 0 2 2 0 8 0 vmmpepl 168 44489 0 42682 95 8 87 95 0 357 1 vmsppl 456 616 0 587 5 0 5 5 0 8 0 rwobjpl 64 17391 0 14361 52 2 50 52 0 8 0 pdppl 4096 1242 0 1174 100 28 72 86 0 8 4 pvpl 32 15305 0 0 125 1 124 124 0 265 0 pmappl 248 616 0 587 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 284 0 36 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(ffffffff83791ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff838e3cd8) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838e3cd8) at __mp_lock+0x199 sys/kern/kern_lock.c:144 intr_handler(ffff80002a454340,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff838e3cd8) at __mp_lock+0x19e __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff838e3cd8) at __mp_lock+0x19e sys/kern/kern_lock.c:144 ktrsyscall(ffff8000ffffc528,5b,10,ffff80002a4545f0) at ktrsyscall+0x2b3 sys/kern/kern_ktrace.c:183 syscall(ffff80002a4545f0) at syscall+0x2e6 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002a4545f0) at syscall+0x2e6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7463557a2ac0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at witness_checkorder+0xa9: movl 0x18(%r14),%r15d ddb{1}> trace witness_checkorder(dead4110dead4230,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:775 mtx_enter(dead4110dead4220) at mtx_enter+0x47 sys/kern/kern_lock.c:238 prsignal(dead4110dead4110,14) at prsignal+0x36 sys/kern/kern_sig.c:909 reaper(ffff8000ffffd718) at reaper+0x32c sys/kern/kern_exit.c:489 end trace frame: 0x0, count: -4