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(fffffd806ef6f5f8,9,0) at witness_checkorder+0x4f5 witness_lock_order_check sys/kern/subr_witness.c:2442 [inline] witness_checkorder(fffffd806ef6f5f8,9,0) at witness_checkorder+0x4f5 sys/kern/subr_witness.c:890 mtx_enter(fffffd806ef6f5e8) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002120cff0,fffffd806ef6f5e8,fffffd806ef6f670,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002120cff0,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002120cff0) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002120cff0,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002120cff0,ffff8000212bd2f0,ffff8000212bd340) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000212bd3c0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212bd3c0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78a1d45f4740, count: -9 ddb{1}> show registers rdi 0xffffffff rsi 0xffffffff rbp 0xffff8000212bd090 rbx 0xffffffff rdx 0 rcx 0xc rax 0xfffffd80031ef000 r8 0x1 r9 0x1 r10 0xeddd2b22f3c3080a r11 0x6e45217e25fa4e1a r12 0xfffffd80031c7300 r13 0xfffffd806ef6f5f8 r14 0xdeaf4152deaf4152 r15 0xfffffd80039b7128 rip 0xffffffff81f47f95 witness_checkorder+0x4f5 cs 0x8 rflags 0x10212 __ALIGN_SIZE+0xf212 rsp 0xffff8000212bcfe0 ss 0 witness_checkorder+0x4f5: movl 0x10(%r14),%ecx ddb{1}> show proc PROC (syz-executor293545056) pid=68312 stat=onproc flags process=1008 proc=2000 pri=0, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff80002120d540,0xffff80002120d2a8 process=0xffff8000ffff4ca8 user=0xffff8000212b8000, vmspace=0xfffffd80735ea758 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 47653 256405 22659 0 2 0 syz-executor293545056 29054 292777 93721 0 2 0 syz-executor293545056 61404 6666 31226 0 2 0 syz-executor293545056 42469 164705 8713 0 2 0 syz-executor293545056 42469 478466 8713 0 2 0x4000000 syz-executor293545056 13545 193802 16047 0 7 0 syz-executor293545056 13545 20655 16047 0 2 0x4000000 syz-executor293545056 57189 516141 19609 0 2 0 syz-executor293545056 57189 265539 19609 0 3 0x4000080 fsleep syz-executor293545056 57094 36061 517 0 2 0 syz-executor293545056 57094 362281 517 0 3 0x4000080 fsleep syz-executor293545056 19609 112004 71840 0 3 0x80 nanoslp syz-executor293545056 8713 59617 71840 0 3 0x80 nanoslp syz-executor293545056 93721 330516 71840 0 3 0x80 nanoslp syz-executor293545056 16047 329800 71840 0 3 0x80 nanoslp syz-executor293545056 3688 442389 71840 0 3 0x80 nanoslp syz-executor293545056 517 823 71840 0 2 0 syz-executor293545056 31226 341917 71840 0 3 0x80 nanoslp syz-executor293545056 22659 183061 71840 0 3 0x80 nanoslp syz-executor293545056 71840 3252 23030 0 3 0x82 nanoslp syz-executor293545056 23030 181431 30486 0 3 0x10008a sigsusp ksh 30486 118285 62370 0 3 0x9a kqread sshd 1830 404783 1 0 3 0x100083 ttyin getty 62370 69521 1 0 3 0x88 kqread sshd 27592 259480 81307 74 3 0x1100092 bpf pflogd 81307 388722 1 0 3 0x80 netio pflogd 66483 381193 69860 73 3 0x1100090 kqread syslogd 69860 448105 1 0 3 0x100082 netio syslogd 3543 369992 1 0 3 0x100080 kqread resolvd 65717 284012 42971 77 3 0x100092 kqread dhcpleased 32225 271938 42971 77 3 0x100092 kqread dhcpleased 42971 316236 1 0 3 0x80 kqread dhcpleased 19722 346681 0 0 3 0x14200 bored smr 57160 176189 0 0 2 0x14200 zerothread 94938 250449 0 0 3 0x14200 aiodoned aiodoned 38946 246866 0 0 3 0x14200 syncer update 94907 454827 0 0 3 0x14200 cleaner cleaner 71989 328726 0 0 2 0x14200 reaper 97635 40189 0 0 3 0x14200 pgdaemon pagedaemon 31189 343419 0 0 3 0x14200 bored viomb 47832 193812 0 0 3 0x40014200 acpi0 acpi0 37879 373792 0 0 3 0x40014200 idle1 3052 41541 0 0 3 0x14200 bored softnet3 31813 4717 0 0 3 0x14200 bored softnet2 83924 230266 0 0 3 0x14200 bored softnet1 86609 421864 0 0 3 0x14200 bored softnet0 63323 95865 0 0 3 0x14200 bored systqmp 71834 56868 0 0 3 0x14200 bored systq 63839 466514 0 0 3 0x40014200 bored softclock 26264 434866 0 0 3 0x40014200 idle0 1 484799 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 10162 6456K 6457K 78643K 11240 0 pcb 13 8K 8K 78643K 13 0 rtable 58 1K 2K 78643K 114 0 pf 15 6K 10K 78643K 26 0 ifaddr 13 9K 9K 78643K 13 0 ifgroup 22 1K 1K 78643K 22 0 counters 44 33K 33K 78643K 44 0 ioctlops 0 0K 4K 78643K 1475 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1176 74K 74K 78643K 1192 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 1 0K 0K 78643K 1 0 proc 67 91K 91K 78643K 302 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 0K 78643K 11 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 25 122K 122K 78643K 25 0 exec 0 0K 1K 78643K 269 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 138 7K 7K 78643K 3989 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 4 0K 0K 78643K 4 0 temp 1 5904K 5968K 78643K 3098 0 kqueue 12 18K 24K 78643K 288 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 20 0 17 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 144 35 0 20 1 0 1 1 0 8 0 syncache 304 5 0 5 2 1 1 1 0 8 1 tcpqe 32 131 0 131 1 1 0 1 0 8 0 tcpcb 808 273 0 267 2 0 2 2 0 8 0 arp 120 2 0 0 1 0 1 1 0 8 0 inpcb 368 298 0 289 2 0 2 2 0 8 1 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 9 0 7 2 1 1 1 0 8 0 pfstkey 128 9 0 7 2 1 1 1 0 8 0 pfstate 376 9 0 7 2 1 1 1 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 96 0 0 6 0 6 6 0 8 0 art_table 32 97 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1432 0 38 88 0 88 88 0 8 0 ffsino 272 1432 0 38 93 0 93 93 0 8 0 nchpl 144 1618 0 49 59 0 59 59 0 8 0 uvmvnodes 80 1446 0 0 30 0 30 30 0 8 0 vnodes 216 1446 0 0 81 0 81 81 0 8 0 namei 1024 4560 0 4560 2 1 1 1 0 8 1 percpumem 16 35 0 0 1 0 1 1 0 8 0 kstatmem 264 8 0 0 1 0 1 1 0 8 0 scxspl 216 5115 0 5115 10 9 1 8 1 8 1 plimitpl 152 17 0 10 1 0 1 1 0 8 0 sigapl 424 615 0 567 7 1 6 6 0 8 0 futexpl 64 539 0 537 1 0 1 1 0 8 0 knotepl 120 57 0 0 2 0 2 2 0 8 0 kqueuepl 216 284 0 276 1 0 1 1 0 8 0 pipepl 320 94 0 91 2 1 1 1 0 8 0 fdescpl 496 598 0 567 4 0 4 4 0 8 0 filepl 152 1540 0 1479 3 0 3 3 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 18 0 9 1 0 1 1 0 8 0 pgrppl 48 18 0 9 1 0 1 1 0 8 0 ucredpl 104 71 0 59 1 0 1 1 0 8 0 zombiepl 144 568 0 567 2 1 1 1 0 8 0 processpl 1072 615 0 567 4 0 4 4 0 8 0 procpl 680 887 0 834 6 1 5 5 0 8 0 sockpl 488 353 0 326 5 1 4 4 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 284 0 0 33 3 30 33 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 319 0 0 18 0 18 18 0 8 0 bufpl 288 2533 0 90 175 0 175 175 0 8 0 anonpl 24 177017 0 174796 29 14 15 25 0 186 1 amapchunkpl 152 13168 0 12924 13 1 12 12 0 158 2 amappl16 200 4801 0 4799 6 5 1 5 0 8 0 amappl15 192 12 0 12 1 1 0 1 0 8 0 amappl14 184 113 0 102 1 0 1 1 0 8 0 amappl13 176 82 0 82 1 1 0 1 0 8 0 amappl12 168 1129 0 1110 2 1 1 2 0 8 0 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 17 0 17 2 1 1 1 0 8 1 amappl9 144 183 0 183 1 1 0 1 0 8 0 amappl8 136 46 0 44 1 0 1 1 0 8 0 amappl7 128 296 0 281 1 0 1 1 0 8 0 amappl6 120 167 0 152 1 0 1 1 0 8 0 amappl5 112 116 0 105 1 0 1 1 0 8 0 amappl4 104 461 0 427 1 0 1 1 0 8 0 amappl3 96 3404 0 3355 3 1 2 2 0 8 0 amappl2 88 769 0 714 2 0 2 2 0 8 0 amappl1 80 10851 0 10338 16 4 12 12 0 8 0 amappl 88 3681 0 3589 3 0 3 3 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 599 0 568 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 599 0 568 1 0 1 1 0 8 0 vmmpekpl 168 8545 0 8525 2 0 2 2 0 8 0 vmmpepl 168 45035 0 43656 72 9 63 63 0 357 3 vmsppl 464 598 0 568 4 0 4 4 0 8 0 rwobjpl 56 21973 0 19772 34 2 32 33 0 8 1 pdppl 4096 1206 0 1136 94 24 70 70 0 8 0 pvpl 32 293635 0 288230 67 22 45 57 0 265 1 pmappl 248 598 0 568 2 0 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 528 0 31 15 0 15 15 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 end of kernel end trace frame: 0x78a1d45f4640, count: -3 ddb{0}> machine ddbcpu 1 Stopped at witness_checkorder+0x4f5: movl 0x10(%r14),%ecx ddb{1}> trace witness_checkorder(fffffd806ef6f5f8,9,0) at witness_checkorder+0x4f5 witness_lock_order_check sys/kern/subr_witness.c:2442 [inline] witness_checkorder(fffffd806ef6f5f8,9,0) at witness_checkorder+0x4f5 sys/kern/subr_witness.c:890 mtx_enter(fffffd806ef6f5e8) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002120cff0,fffffd806ef6f5e8,fffffd806ef6f670,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002120cff0,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002120cff0) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002120cff0,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002120cff0,ffff8000212bd2f0,ffff8000212bd340) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000212bd3c0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212bd3c0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78a1d45f4740, count: -9