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(dead4110dead4228,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(dead4110dead4218) at mtx_enter+0x95 sys/kern/kern_lock.c:406 prsignal(dead4110dead4110,14) 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 0xffff80002a1f47c0 rbx 0 rdx 0 rcx 0xffff8000ffffdc90 rax 0xffff80002999dffe r8 0x7f7fffffc000 r9 0x1 r10 0xea47f6b64483f728 r11 0x3d0d22ce0487dd48 r12 0xdead4110dead42fe r13 0x9 r14 0xdead4110dead4228 r15 0 rip 0xffffffff833ef435 witness_checkorder+0xb5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a1f4720 ss 0x10 witness_checkorder+0xb5: movl 0x20(%r14),%r15d ddb{1}> show proc PROC (reaper) tid=49037 pid=56258 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=0xffff8000fffff758,0xffff8000ffffc7e0 process=0xffff8000ffffb9c0 user=0xffff80002a1ef000, vmspace=0xffffffff83a5a8e0 estcpu=0, cpticks=4, pctcpu=0.1, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 92878 122197 98095 32767 2 0x10 syz-executor 92878 230767 98095 32767 7 0x4000010 syz-executor 45751 65705 18400 32767 2 0x10 syz-executor 45751 58975 18400 32767 2 0x4000010 syz-executor 3324 12046 86259 32767 2 0x10 syz-executor 3324 40385 86259 32767 3 0x4000090 fsleep syz-executor 8390 62432 39136 32767 3 0x90 nanoslp syz-executor 8390 92224 39136 32767 3 0x4000090 fifor syz-executor 8390 279927 39136 32767 3 0x4000090 fifor syz-executor 92696 103684 91773 32767 2 0x10 syz-executor 92696 340044 91773 32767 3 0x4000090 kqsel syz-executor 92696 119727 91773 32767 3 0x4000090 fsleep syz-executor 7177 226145 54846 32767 3 0x90 nanoslp syz-executor 11045 441217 34926 32767 2 0x10 syz-executor 2375 192419 8277 32767 2 0x10 syz-executor 39136 166341 33589 32767 3 0x90 nanoslp syz-executor 98095 218982 92572 32767 3 0x90 nanoslp syz-executor 86259 476806 91484 32767 3 0x90 nanoslp syz-executor 18400 269502 36149 32767 3 0x90 nanoslp syz-executor 91773 388433 66944 32767 3 0x90 nanoslp syz-executor 54846 307834 71947 0 3 0x82 wait syz-executor 33589 284408 71947 0 3 0x82 wait syz-executor 66944 372208 71947 0 3 0x82 wait syz-executor 91484 1120 71947 0 3 0x82 wait syz-executor 34926 215724 71947 0 3 0x82 wait syz-executor 36149 332363 71947 0 3 0x82 wait syz-executor 8277 425836 71947 0 3 0x82 wait syz-executor 92572 204937 71947 0 3 0x82 wait syz-executor 71947 308653 61029 0 3 0x82 kqread syz-executor 61029 9341 72890 0 3 0x10008a sigsusp ksh 72890 401873 12402 0 3 0x98 kqread sshd-session 12402 323103 5184 0 3 0x92 kqread sshd-session 675 488399 1 0 3 0x100083 ttyin getty 5184 273515 1 0 3 0x88 kqread sshd 6769 429990 11774 73 3 0x1100090 kqread syslogd 11774 230010 1 0 3 0x100082 sbwait syslogd 87627 274831 1 0 3 0x100080 kqread resolvd 86212 173028 45406 77 3 0x100092 kqread dhcpleased 91934 408877 45406 77 3 0x100092 kqread dhcpleased 45406 168384 1 0 3 0x80 kqread dhcpleased 38093 261227 0 0 3 0x14200 bored smr 74487 230459 0 0 2 0x14200 zerothread 44467 458195 0 0 3 0x14200 aiodoned aiodoned 70489 12684 0 0 3 0x14200 syncer update 32862 464828 0 0 3 0x14200 cleaner cleaner *56258 49037 0 0 7 0x14200 reaper 87723 434311 0 0 3 0x14200 pgdaemon pagedaemon 31921 422070 0 0 3 0x14200 bored viomb 96367 180020 0 0 3 0x40014200 acpi0 acpi0 63492 398048 0 0 3 0x40014200 idle1 16866 336567 0 0 3 0x14200 bored softnet1 50726 156111 0 0 3 0x14200 bored softnet0 56017 521224 0 0 3 0x14200 bored systqmp 30541 235101 0 0 3 0x14200 bored systq 88864 431488 0 0 3 0x14200 tmoslp softclockmp 84360 7906 0 0 3 0x40014200 tmoslp softclock 31364 106550 0 0 3 0x40014200 idle0 1 202775 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 56258 (reaper) thread 0xffff8000ffffdc90 (49037) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a00580) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11057 12019K 12034K 166960K 12148 0 pcb 17 12K 12K 166960K 17 0 rtable 239 6K 7K 166960K 349 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 4 1K 9K 166960K 8 0 counters 70 37K 37K 166960K 70 0 ioctlops 0 0K 2K 166960K 35 0 iov 0 0K 12K 166960K 6 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1288 81K 81K 166960K 1360 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 22 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 24 89K 125K 166960K 265 0 proc 58 99K 163K 166960K 525 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 23 0 in_multi 99 7K 7K 166960K 101 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 12 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 367 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 248 176K 193K 166960K 4025 0 UVM aobj 10 2K 2K 166960K 11 0 pinsyscall 45 90K 116K 166960K 1345 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 5 0 NDP 11 0K 2K 166960K 27 0 temp 40 9111K 9127K 166960K 4120 0 kqueue 16 24K 28K 166960K 65 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 37 0 34 1 0 1 1 0 8 0 rtentry 176 112 0 1 6 0 6 6 0 8 0 unpcb 144 102 0 85 1 0 1 1 0 8 0 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 38 0 33 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 ipq 40 2 0 1 1 0 1 1 0 8 0 ipqe 40 3 0 2 1 0 1 1 0 8 0 inpcb 328 213 0 202 7 0 7 7 0 8 5 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 1 0 0 1 0 1 1 0 8 0 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 256 454 0 0 29 0 29 29 0 8 0 art_table 40 455 0 0 5 0 5 5 0 8 0 art_node 32 112 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 2 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 72 18 0 8 1 0 1 1 0 8 0 shmpl 112 8 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1749 0 283 92 0 92 92 0 8 0 ffsino 296 1749 0 283 114 0 114 114 0 8 0 nchpl 144 2115 0 418 63 0 63 63 0 8 0 vnodes 216 1830 0 0 102 0 102 102 0 8 0 namei 1024 6339 0 6339 2 0 2 2 0 8 2 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 7605 0 7605 6 2 4 4 1 8 4 plimitpl 152 114 0 89 2 0 2 2 0 8 1 sigapl 424 556 0 504 7 0 7 7 0 8 0 knotepl 120 346 0 0 11 0 11 11 0 8 0 kqueuepl 224 99 0 86 3 0 3 3 0 8 2 pipepl 344 130 0 103 3 0 3 3 0 8 0 fdescpl 528 540 0 504 4 0 4 4 0 8 0 filepl 160 2243 0 2027 13 0 13 13 0 8 3 lockfpl 104 117 0 114 1 0 1 1 0 8 0 lockfspl 48 22 0 19 1 0 1 1 0 8 0 sessionpl 144 27 0 11 1 0 1 1 0 8 0 pgrppl 48 36 0 12 1 0 1 1 0 8 0 ucredpl 104 245 0 226 1 0 1 1 0 8 0 zombiepl 144 505 0 504 1 0 1 1 0 8 0 processpl 1232 556 0 504 5 0 5 5 0 8 0 procpl 664 774 0 715 7 0 7 7 0 8 1 sosppl 176 1 0 1 1 0 1 1 0 8 1 sockpl 752 355 0 324 10 0 10 10 0 8 6 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 133 0 0 17 0 17 17 0 8 0 mcl2k 2048 32 0 0 4 0 4 4 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 213 0 0 14 0 14 14 0 8 0 bufpl 272 2499 0 102 160 0 160 160 0 8 0 anonpl 32 7102 0 0 58 0 58 58 0 246 0 amapchunkpl 152 12199 0 11662 39 0 39 39 0 158 15 amappl16 200 2086 0 2065 14 4 10 14 0 8 8 amappl15 192 4 0 4 2 2 0 1 0 8 0 amappl14 184 401 0 400 1 0 1 1 0 8 0 amappl13 176 129 0 119 1 0 1 1 0 8 0 amappl12 168 780 0 745 2 0 2 2 0 8 0 amappl11 160 43 0 42 1 0 1 1 0 8 0 amappl10 152 60 0 50 1 0 1 1 0 8 0 amappl9 144 270 0 270 1 1 0 1 0 8 0 amappl8 136 90 0 89 1 0 1 1 0 8 0 amappl7 128 153 0 142 1 0 1 1 0 8 0 amappl6 120 150 0 149 1 0 1 1 0 8 0 amappl5 112 102 0 94 1 0 1 1 0 8 0 amappl4 104 275 0 259 1 0 1 1 0 8 0 amappl3 96 2222 0 2097 5 1 4 4 0 8 0 amappl2 88 516 0 463 2 0 2 2 0 8 0 amappl1 80 11001 0 10428 17 1 16 16 0 8 2 amappl 88 3328 0 3145 5 0 5 5 0 92 0 uvmvnodes 80 102 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 10 0 1 1 0 1 1 0 8 0 uaddrrnd 24 540 0 504 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 540 0 504 1 0 1 1 0 8 0 vmmpekpl 168 6295 0 6262 2 0 2 2 0 8 0 vmmpepl 168 44188 0 42184 105 0 105 105 0 357 6 vmsppl 488 539 0 504 7 1 6 6 0 8 1 rwobjpl 80 15989 0 15041 25 0 25 25 0 8 2 pdppl 4096 1087 0 1008 109 22 87 97 0 8 8 pvpl 32 13995 0 0 114 1 113 114 0 265 0 pmappl 256 539 0 504 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 442 0 25 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff838fdff0) 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+0x54 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x54 sys/dev/kcov.c:153 __mp_lock(ffffffff839ffd80) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839ffd80) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x78 kd_claim sys/dev/kcov.c:626 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x78 sys/dev/kcov.c:157 __mp_lock(ffffffff839ffd80) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839ffd80) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 filter_process(fffff5006bfed5b0,0) at filter_process+0x5d sys/kern/kern_event.c:1087 kqueue_register(fffff5006f4bb9a0,ffff80003c40d4c0,0,ffff8000fffe7248) at kqueue_register+0xd91 sys/kern/kern_event.c:1535 sys_kevent(ffff8000fffe7248,ffff80003c40d7e0,ffff80003c40d730) at sys_kevent+0x3bc sys/kern/kern_event.c:1303 syscall(ffff80003c40d7e0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c40d7e0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2aa3b655c50, count: -15 ddb{0}> machine ddbcpu 1 Stopped at witness_checkorder+0xb5: movl 0x20(%r14),%r15d ddb{1}> trace witness_checkorder(dead4110dead4228,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(dead4110dead4218) at mtx_enter+0x95 sys/kern/kern_lock.c:406 prsignal(dead4110dead4110,14) 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