kernel: protection fault trap, code=0 Stopped at witness_checkorder+0x4f5: movl 0x10(%r14),%ecx 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(fffffd806f0871c0,9,0) at witness_checkorder+0x4f5 witness_lock_order_check sys/kern/subr_witness.c:2442 [inline] witness_checkorder(fffffd806f0871c0,9,0) at witness_checkorder+0x4f5 sys/kern/subr_witness.c:890 mtx_enter(fffffd806f0871b0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002451ad50,fffffd806f0871b0,fffffd806f087238,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002451ad50,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002451ad50) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002451ad50,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002451ad50,ffff80002bbe3ca0,ffff80002bbe3cf0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002bbe3d70) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002bbe3d70) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74e4dc171a10, count: -9 ddb{1}> show registers rdi 0xffffffff rsi 0xffffffff rbp 0xffff80002bbe3a40 rbx 0xffffffff rdx 0 rcx 0xc rax 0xfffffd80031ef000 r8 0x1 r9 0x1 r10 0x96e5a95d3935c81a r11 0x6d651babccd37c81 r12 0xfffffd80031c7300 r13 0xfffffd806f0871c0 r14 0xdeaf4152deaf4152 r15 0xfffffd80039b4ea0 rip 0xffffffff81f47f95 witness_checkorder+0x4f5 cs 0x8 rflags 0x10212 __ALIGN_SIZE+0xf212 rsp 0xffff80002bbe3990 ss 0x10 witness_checkorder+0x4f5: movl 0x10(%r14),%ecx ddb{1}> show proc PROC (syz-executor.4) pid=457941 stat=onproc flags process=1008 proc=2000 pri=0, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff8000211d9560,0xffff80002451b800 process=0xffff800021222a00 user=0xffff80002bbde000, vmspace=0xfffffd806efc3918 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 63267 387343 42581 0 2 0 syz-executor.0 92562 92632 76777 0 2 0 syz-executor.6 27249 339304 20679 0 2 0 syz-executor.2 27249 251798 20679 0 2 0x4000000 syz-executor.2 25341 301814 0 0 3 0x14280 nfsidl nfsio 65572 244921 0 0 3 0x14280 nfsidl nfsio 15166 501286 0 0 3 0x14280 nfsidl nfsio 89773 190008 0 0 3 0x14280 nfsidl nfsio 65424 412452 0 0 3 0x14280 nfsidl nfsio 54342 295992 0 0 3 0x14280 nfsidl nfsio 92901 207241 0 0 3 0x14280 nfsidl nfsio 19423 436279 0 0 3 0x14280 nfsidl nfsio 92925 375449 0 0 3 0x14280 nfsidl nfsio 21064 350311 0 0 3 0x14280 nfsidl nfsio 62963 422607 0 0 3 0x14280 nfsidl nfsio 79858 421929 0 0 3 0x14280 nfsidl nfsio 12233 326126 0 0 3 0x14280 nfsidl nfsio 15695 41855 0 0 3 0x14280 nfsidl nfsio 55271 85297 0 0 3 0x14280 nfsidl nfsio 23581 46002 0 0 3 0x14280 nfsidl nfsio 34164 49482 0 0 3 0x14280 nfsidl nfsio 91910 510719 0 0 3 0x14280 nfsidl nfsio 53374 320484 0 0 3 0x14280 nfsidl nfsio 56816 192021 0 0 3 0x14280 nfsidl nfsio 5295 197645 65235 0 2 0x2 syz-executor.7 76777 435005 65235 0 3 0x82 nanoslp syz-executor.6 38706 502599 65235 0 2 0x2 syz-executor.5 27046 521149 65235 0 2 0x2 syz-executor.4 20679 412595 65235 0 3 0x82 nanoslp syz-executor.2 90317 255416 65235 0 2 0x2 syz-executor.1 32648 117594 65235 0 3 0x82 nanoslp syz-executor.3 42581 447708 65235 0 3 0x82 nanoslp syz-executor.0 65235 131707 28677 0 3 0x2000082 wait syz-fuzzer 65235 285432 28677 0 3 0x6000082 nanoslp syz-fuzzer 65235 80480 28677 0 3 0x6000082 wait syz-fuzzer 65235 409702 28677 0 3 0x6000082 wait syz-fuzzer 65235 507342 28677 0 3 0x6000082 wait syz-fuzzer 65235 335817 28677 0 3 0x6000082 wait syz-fuzzer 65235 439002 28677 0 3 0x6000082 wait syz-fuzzer 65235 519356 28677 0 3 0x6000082 thrsleep syz-fuzzer 65235 302476 28677 0 3 0x6000082 wait syz-fuzzer 65235 258537 28677 0 3 0x6000082 thrsleep syz-fuzzer 65235 75376 28677 0 3 0x6000082 thrsleep syz-fuzzer 65235 314613 28677 0 3 0x6000082 wait syz-fuzzer 65235 131935 28677 0 2 0x6000002 syz-fuzzer 65235 520560 28677 0 3 0x6000082 thrsleep syz-fuzzer 65235 158903 28677 0 3 0x6000082 thrsleep syz-fuzzer 65235 423551 28677 0 3 0x6000082 kqread syz-fuzzer 28677 383579 43154 0 3 0x10008a sigsusp ksh 43154 144142 34723 0 3 0x9a kqread sshd 347 462384 1 0 3 0x100083 ttyin getty 34723 460845 1 0 3 0x88 kqread sshd 43445 5235 57803 74 3 0x1100092 bpf pflogd 57803 298037 1 0 3 0x80 netio pflogd 48970 324135 64370 73 3 0x1100090 kqread syslogd 64370 231756 1 0 3 0x100082 netio syslogd 62924 106609 1 0 3 0x100080 kqread resolvd 38050 369193 8310 77 3 0x100092 kqread dhcpleased 91940 453820 8310 77 3 0x100092 kqread dhcpleased 8310 433509 1 0 3 0x80 kqread dhcpleased 48560 344546 0 0 3 0x14200 bored smr 1077 457197 0 0 2 0x14200 zerothread 73220 189698 0 0 3 0x14200 aiodoned aiodoned 14613 139808 0 0 3 0x14200 syncer update 192 90137 0 0 3 0x14200 cleaner cleaner 39758 177315 0 0 7 0x14200 reaper 24678 200556 0 0 3 0x14200 pgdaemon pagedaemon 29048 21426 0 0 3 0x14200 bored viomb 23521 498974 0 0 3 0x40014200 acpi0 acpi0 81149 479668 0 0 3 0x40014200 idle1 14338 432753 0 0 3 0x14200 bored softnet3 56324 397134 0 0 3 0x14200 bored softnet2 59629 432614 0 0 3 0x14200 bored softnet1 39330 257483 0 0 3 0x14200 bored softnet0 51588 163494 0 0 3 0x14200 bored systqmp 64932 467184 0 0 3 0x14200 bored systq 97102 259219 0 0 3 0x40014200 bored softclock 8896 218223 0 0 3 0x40014200 idle0 1 394978 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10234 6519K 6864K 78643K 23520 0 pcb 13 13K 15K 78643K 196 0 rtable 234 6K 6K 78643K 356 0 pf 32 9K 10K 78643K 43 0 ifaddr 45 15K 15K 78643K 47 0 ifgroup 55 2K 2K 78643K 55 0 sysctl 2 0K 0K 78643K 2 0 counters 60 35K 35K 78643K 60 0 ioctlops 0 0K 4K 78643K 3854 0 iov 0 0K 8K 78643K 2478 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1475 92K 92K 78643K 12304 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 196 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 4729 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 14 49K 85K 78643K 47433 0 proc 67 91K 128K 78643K 526 0 subproc 104 6K 6K 78643K 104 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 99 7K 7K 78643K 99 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 1K 78643K 390 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 312 82K 83K 78643K 408692 0 UVM aobj 131 4K 4K 78643K 157 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 12 0K 1K 78643K 28 0 temp 73 5916K 6044K 78643K 113623 0 kqueue 12 18K 28K 78643K 1214 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 37 0 34 1 0 1 1 0 8 0 rtentry 112 111 0 1 4 0 4 4 0 8 0 unpcb 144 2724 0 2709 12 11 1 6 0 8 0 syncache 304 4 0 4 1 1 0 1 0 8 0 tcpqe 32 307 0 307 1 1 0 1 0 8 0 tcpcb 808 1936 0 1930 16 15 1 8 0 8 0 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 368 8936 0 8927 54 52 2 13 0 8 1 nd6 136 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 pffrag 232 14 0 14 1 1 0 1 0 482 0 pffrnode 88 8 0 8 1 1 0 1 0 8 0 pffrent 40 655 0 655 1 1 0 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 pfstitem 24 42 0 40 1 0 1 1 0 8 0 pfstkey 128 42 0 40 1 0 1 1 0 8 0 pfstate 376 42 0 40 4 3 1 3 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 0 29 0 29 29 0 8 0 art_table 32 453 0 0 4 0 4 4 0 8 0 art_node 16 110 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 0 1 0 1 1 0 8 0 semapl 112 4727 0 4717 1 0 1 1 0 8 0 shmpl 112 154 0 26 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 49840 0 48393 91 0 91 91 0 8 0 ffsino 272 49840 0 48393 97 0 97 97 0 8 0 nchpl 144 102405 0 100713 64 0 64 64 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 244896 0 244896 2 1 1 2 0 8 1 percpumem 16 43 0 0 1 0 1 1 0 8 0 kstatmem 264 24 0 0 2 0 2 2 0 8 0 scxspl 216 294534 0 294534 10 9 1 8 1 8 1 plimitpl 152 437 0 421 1 0 1 1 0 8 0 sigapl 424 47777 0 47712 9 1 8 8 0 8 0 futexpl 64 236612 0 236612 1 0 1 1 0 8 1 knotepl 120 137 0 0 4 0 4 4 0 8 0 kqueuepl 216 2062 0 2054 7 4 3 5 0 8 2 pipepl 320 3826 0 3798 47 39 8 8 0 8 5 fdescpl 496 47740 0 47713 5 1 4 5 0 8 0 filepl 152 114743 0 114501 70 55 15 17 0 8 5 lockfpl 104 3790 0 3788 6 5 1 2 0 8 0 lockfspl 48 1655 0 1653 1 0 1 1 0 8 0 sessionpl 144 24 0 7 1 0 1 1 0 8 0 pgrppl 48 1532 0 1515 1 0 1 1 0 8 0 ucredpl 104 3323 0 3311 1 0 1 1 0 8 0 zombiepl 144 47714 0 47712 1 0 1 1 0 8 0 processpl 1072 47777 0 47712 5 0 5 5 0 8 0 procpl 680 103830 0 103748 28 20 8 9 0 8 0 sockpl 488 11697 0 11670 96 92 4 20 0 8 0 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 25 0 0 2 0 2 2 0 8 0 mcl8k 8192 41 0 0 3 0 3 3 0 8 0 mcl4k 4096 36 0 0 3 1 2 3 0 8 0 mcl2k2 2112 15 0 0 1 0 1 1 0 8 0 mcl2k 2048 362 0 0 35 15 20 35 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 738 0 0 20 0 20 20 0 8 0 bufpl 288 52024 0 45694 453 0 453 453 0 8 0 anonpl 24 3262319 0 3254540 63 13 50 56 0 186 0 amapchunkpl 152 1284044 0 1283360 79 48 31 33 0 158 1 amappl16 200 49355 0 49202 11 2 9 9 0 8 0 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 171 0 156 2 1 1 2 0 8 0 amappl13 176 59 0 59 1 1 0 1 0 8 0 amappl12 168 48414 0 48387 3 1 2 2 0 8 0 amappl11 160 55 0 40 1 0 1 1 0 8 0 amappl10 152 36 0 26 1 0 1 1 0 8 0 amappl9 144 230 0 229 2 1 1 1 0 8 0 amappl8 136 460 0 371 4 0 4 4 0 8 0 amappl7 128 145 0 132 2 0 2 2 0 8 0 amappl6 120 318 0 298 2 1 1 2 0 8 0 amappl5 112 452 0 441 1 0 1 1 0 8 0 amappl4 104 735 0 691 3 1 2 3 0 8 0 amappl3 96 259660 0 259587 4 1 3 3 0 8 0 amappl2 88 49857 0 49791 3 1 2 3 0 8 0 amappl1 80 167596 0 167045 23 10 13 23 0 8 0 amappl 88 408127 0 407944 7 1 6 6 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 72 156 0 26 3 0 3 3 0 8 0 uaddrrnd 24 47740 0 47713 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 47740 0 47713 1 0 1 1 0 8 0 vmmpekpl 168 225565 0 225509 3 0 3 3 0 8 0 vmmpepl 168 2521180 0 2519203 170 75 95 118 0 357 3 vmsppl 464 47739 0 47713 5 1 4 5 0 8 0 rwobjpl 56 513459 0 506160 106 2 104 104 0 8 0 pdppl 4096 95488 0 95426 750 682 68 80 0 8 6 pvpl 32 10892180 0 10878782 399 283 116 364 0 265 0 pmappl 248 47739 0 47713 3 1 2 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1594 0 788 24 0 24 24 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff82ba6ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff82cd0260) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cd0260) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff8000211b9b20,ffff80000027b500) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f __mp_lock(ffffffff82cd0260) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cd0260) at __mp_lock+0x122 sys/kern/kern_lock.c:147 reaper(ffff8000211b37f0) at reaper+0x160 sys/kern/kern_exit.c:454 end trace frame: 0x0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at witness_checkorder+0x4f5: movl 0x10(%r14),%ecx ddb{1}> trace witness_checkorder(fffffd806f0871c0,9,0) at witness_checkorder+0x4f5 witness_lock_order_check sys/kern/subr_witness.c:2442 [inline] witness_checkorder(fffffd806f0871c0,9,0) at witness_checkorder+0x4f5 sys/kern/subr_witness.c:890 mtx_enter(fffffd806f0871b0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002451ad50,fffffd806f0871b0,fffffd806f087238,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002451ad50,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002451ad50) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002451ad50,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002451ad50,ffff80002bbe3ca0,ffff80002bbe3cf0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002bbe3d70) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002bbe3d70) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74e4dc171a10, count: -9