kernel: protection fault trap, code=0 Stopped at witness_checkorder+0x1ec: movl 0x8(%r14),%ebx 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(fffffd8076a69d90,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd8076a69d80) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002126bd38,fffffd8076a69d80,fffffd8076a69e08,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002126bd38,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002126bd38) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002126bd38,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002126bd38,ffff80002e427630,ffff80002e427680) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002e427700) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e427700) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7353764d2e40, count: -9 ddb{1}> show registers rdi 0 rsi 0x20000 acpi_pdirpa+0xbe63 rbp 0xffff80002e4273d0 rbx 0xe rdx 0 rcx 0xffff80002126bd38 rax 0xffff800020d58ff0 r8 0x1 r9 0x1 r10 0x966d67373171fcef r11 0x212b142768dfeaa5 r12 0 r13 0xfffffd8076a69d90 r14 0x1004808610008086 r15 0xffff80002126bd38 rip 0xffffffff81591c4c witness_checkorder+0x1ec cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e427320 ss 0 witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{1}> show proc PROC (syz-executor.0) pid=413417 stat=onproc flags process=1018 proc=2000 pri=0, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff80002126a550,0xffff800021273818 process=0xffff8000ffff8c98 user=0xffff80002e422000, vmspace=0xfffffd807eff9000 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 13010 116207 26836 32767 2 0x10 syz-executor.6 13010 420988 26836 32767 2 0x4000010 syz-executor.6 46410 48388 12826 32767 3 0x90 nanoslp syz-executor.5 46410 8753 12826 32767 3 0x4000090 netio syz-executor.5 46410 106050 12826 32767 3 0x4000090 fsleep syz-executor.5 28193 279082 80887 32767 2 0x10 syz-executor.1 28193 220883 80887 32767 2 0x4000010 syz-executor.1 59863 16252 46753 32767 2 0x10 syz-executor.7 59863 355338 46753 32767 2 0x4000010 syz-executor.7 87778 429372 60967 32767 2 0x10 syz-executor.2 87778 170317 60967 32767 3 0x4000090 fsleep syz-executor.2 46753 416855 9680 32767 3 0x90 nanoslp syz-executor.7 9680 408496 56590 0 3 0x82 wait syz-executor.7 60967 203297 95672 32767 3 0x90 nanoslp syz-executor.2 95672 20197 56590 0 3 0x82 wait syz-executor.2 57257 521153 95046 32767 7 0x10 syz-executor.4 95046 91211 56590 0 3 0x82 wait syz-executor.4 69185 358164 36682 32767 3 0x90 nanoslp syz-executor.0 36682 357387 56590 0 3 0x82 wait syz-executor.0 26836 36443 75099 32767 3 0x90 nanoslp syz-executor.6 75099 315328 56590 0 3 0x82 wait syz-executor.6 80887 314004 46012 32767 3 0x90 nanoslp syz-executor.1 46012 313488 56590 0 3 0x82 wait syz-executor.1 87515 166597 0 0 3 0x14200 bored sosplice 12826 185017 78909 32767 3 0x90 nanoslp syz-executor.5 78909 302512 56590 0 3 0x82 wait syz-executor.5 50229 112356 66674 32767 3 0x90 nanoslp syz-executor.3 66674 132413 56590 0 3 0x82 wait syz-executor.3 56590 35688 92478 0 3 0x2000082 wait syz-fuzzer 56590 28684 92478 0 3 0x6000082 nanoslp syz-fuzzer 56590 239635 92478 0 3 0x6000082 thrsleep syz-fuzzer 56590 209936 92478 0 3 0x6000082 wait syz-fuzzer 56590 520813 92478 0 3 0x6000082 thrsleep syz-fuzzer 56590 349995 92478 0 3 0x6000082 wait syz-fuzzer 56590 225813 92478 0 3 0x6000082 thrsleep syz-fuzzer 56590 37538 92478 0 3 0x6000082 wait syz-fuzzer 56590 458728 92478 0 2 0x6000082 syz-fuzzer 56590 204810 92478 0 3 0x6000082 wait syz-fuzzer 56590 305365 92478 0 3 0x6000082 thrsleep syz-fuzzer 56590 43465 92478 0 3 0x6000082 wait syz-fuzzer 56590 366546 92478 0 3 0x6000082 kqread syz-fuzzer 56590 416568 92478 0 3 0x6000082 wait syz-fuzzer 56590 55960 92478 0 3 0x6000082 thrsleep syz-fuzzer 56590 363863 92478 0 3 0x6000082 wait syz-fuzzer 92478 68056 374 0 3 0x10008a sigsusp ksh 374 66701 29338 0 3 0x9a kqread sshd 66385 521753 1 0 3 0x100083 ttyin getty 29338 458693 1 0 3 0x88 kqread sshd 77804 191380 36151 73 3 0x1100090 kqread syslogd 36151 397424 1 0 3 0x100082 netio syslogd 39435 460787 1 0 3 0x100080 kqread resolvd 6073 322938 60471 77 3 0x100092 kqread dhcpleased 64613 124875 60471 77 3 0x100092 kqread dhcpleased 60471 101364 1 0 3 0x80 kqread dhcpleased 91975 135995 0 0 3 0x14200 bored smr 57319 380314 0 0 2 0x14200 zerothread 94904 404633 0 0 3 0x14200 aiodoned aiodoned 37259 11891 0 0 3 0x14200 syncer update 21694 65561 0 0 3 0x14200 cleaner cleaner 48939 14616 0 0 2 0x14200 reaper 43723 460233 0 0 3 0x14200 pgdaemon pagedaemon 60734 25776 0 0 3 0x14200 bored viomb 31573 132842 0 0 3 0x40014200 acpi0 acpi0 14388 502436 0 0 3 0x40014200 idle1 65524 292047 0 0 3 0x14200 bored softnet3 87665 302596 0 0 3 0x14200 bored softnet2 65579 4549 0 0 3 0x14200 bored softnet1 92634 215012 0 0 3 0x14200 bored softnet0 49159 44458 0 0 3 0x14200 bored systqmp 58694 244370 0 0 3 0x14200 bored systq 13867 184752 0 0 3 0x40014200 bored softclock 8649 139844 0 0 3 0x40014200 idle0 1 213644 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 10221 6413K 6420K 78643K 11355 0 pcb 13 12K 14K 78643K 17 0 rtable 250 7K 7K 78643K 1341 0 pf 29 8K 8K 78643K 65 0 ifaddr 44 15K 15K 78643K 120 0 ifgroup 50 2K 2K 78643K 122 0 sysctl 2 0K 0K 78643K 2 0 counters 60 35K 35K 78643K 96 0 ioctlops 0 0K 2K 78643K 165 0 iov 0 0K 20K 78643K 841 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 2808 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 189 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1143 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 24 89K 109K 78643K 10479 0 sigio 0 0K 0K 78643K 354 0 proc 56 78K 115K 78643K 1480 0 subproc 104 6K 6K 78643K 338 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 427 0 in_multi 99 7K 7K 78643K 413 0 ether_multi 1 0K 0K 78643K 7 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 265 1182K 1182K 78643K 265 0 exec 0 0K 1K 78643K 2396 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 458 92K 104K 78643K 104003 0 UVM aobj 131 4K 4K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 311 0 NDP 11 0K 2K 78643K 81 0 temp 74 5920K 6048K 78643K 27922 0 kqueue 12 18K 48K 78643K 4313 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 120 420 0 417 5 4 1 3 0 8 0 rtentry 112 329 0 211 4 0 4 4 0 8 0 unpcb 144 5884 0 5869 67 61 6 6 0 8 5 syncache 304 95 0 95 17 17 0 1 0 8 0 tcpqe 32 372 0 372 15 15 0 1 0 8 0 tcpcb 808 3775 0 3758 113 107 6 14 0 8 3 arp 120 57 0 38 1 0 1 1 0 8 0 ipq 40 20 0 19 7 6 1 1 0 8 0 ipqe 40 94 0 93 7 6 1 1 0 8 0 inpcb 368 7226 0 7201 133 127 6 13 0 8 2 nd6 136 95 0 64 2 0 2 2 0 8 0 kcovpl 48 26 0 18 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1303 0 826 31 1 30 30 0 8 0 art_table 32 1304 0 826 4 0 4 4 0 8 0 art_node 16 328 0 220 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 3 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 1139 0 1129 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 14279 0 12834 91 0 91 91 0 8 0 ffsino 272 14279 0 12834 97 0 97 97 0 8 0 nchpl 144 27667 0 26022 63 0 63 63 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 88723 0 88723 3 2 1 2 0 8 1 percpumem 16 61 0 18 1 0 1 1 0 8 0 kstatmem 264 58 0 36 2 0 2 2 0 8 0 scxspl 216 87234 0 87234 43 42 1 8 1 8 1 plimitpl 152 1589 0 1565 17 16 1 2 0 8 0 sigapl 424 10734 0 10679 7 0 7 7 0 8 0 futexpl 64 88710 0 88708 3 2 1 1 0 8 0 knotepl 120 674 0 0 17 0 17 17 0 8 0 kqueuepl 216 21127 0 21118 132 127 5 12 0 8 4 pipepl 320 14581 0 14553 120 112 8 15 0 8 5 fdescpl 496 10716 0 10681 7 2 5 6 0 8 0 filepl 152 98905 0 98666 179 164 15 26 0 8 5 lockfpl 104 2912 0 2910 5 4 1 2 0 8 0 lockfspl 48 595 0 593 1 0 1 1 0 8 0 sessionpl 144 41 0 25 1 0 1 1 0 8 0 pgrppl 48 278 0 262 1 0 1 1 0 8 0 ucredpl 104 8700 0 8682 1 0 1 1 0 8 0 zombiepl 144 10682 0 10679 1 0 1 1 0 8 0 processpl 1072 10734 0 10679 4 0 4 4 0 8 0 procpl 680 29093 0 29016 27 19 8 8 0 8 1 sosppl 168 255 0 255 7 7 0 1 0 8 0 sockpl 488 14842 0 14802 280 265 15 29 0 8 8 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 19 0 0 3 1 2 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 13 0 0 1 0 1 1 0 8 0 mcl8k 8192 25 0 0 3 0 3 3 0 8 0 mcl4k 4096 87 0 0 7 3 4 5 0 8 0 mcl2k2 2112 10 0 0 1 0 1 1 0 8 0 mcl2k 2048 455 0 0 46 16 30 46 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 1785 0 0 77 0 77 77 0 8 0 bufpl 288 22354 0 16029 453 0 453 453 0 8 0 anonpl 24 1172075 0 1160588 203 110 93 96 0 186 0 amapchunkpl 152 326474 0 325524 62 23 39 47 0 158 0 amappl16 200 27873 0 27598 187 170 17 28 0 8 0 amappl15 192 11 0 10 2 1 1 1 0 8 0 amappl14 184 220 0 204 2 1 1 2 0 8 0 amappl13 176 11 0 11 1 1 0 1 0 8 0 amappl12 168 11632 0 11592 2 0 2 2 0 8 0 amappl11 160 49 0 39 1 0 1 1 0 8 0 amappl10 152 56 0 42 1 0 1 1 0 8 0 amappl9 144 278 0 278 16 15 1 1 0 8 1 amappl8 136 667 0 512 6 0 6 6 0 8 0 amappl7 128 109 0 94 2 1 1 2 0 8 0 amappl6 120 428 0 398 2 1 1 2 0 8 0 amappl5 112 456 0 446 1 0 1 1 0 8 0 amappl4 104 839 0 800 3 1 2 3 0 8 0 amappl3 96 64585 0 64482 3 0 3 3 0 8 0 amappl2 88 11386 0 11309 3 1 2 3 0 8 0 amappl1 80 46311 0 45783 22 10 12 22 0 8 0 amappl 88 102978 0 102702 7 0 7 7 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 10716 0 10681 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 10716 0 10681 1 0 1 1 0 8 0 vmmpekpl 168 139016 0 138945 4 0 4 4 0 8 0 vmmpepl 168 634358 0 631884 268 153 115 124 0 357 0 vmsppl 464 10715 0 10681 6 1 5 5 0 8 0 rwobjpl 56 166575 0 159110 124 15 109 109 0 8 0 pdppl 4096 21440 0 21362 424 342 82 88 0 8 4 pvpl 32 3065316 0 3047522 464 290 174 353 0 265 0 pmappl 248 10715 0 10681 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1518 0 620 26 0 26 26 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff82bc7ff0) 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(ffffffff82d6d010) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d6d010) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff80002e47d250) at syscall+0x5cd mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e47d250) at syscall+0x5cd sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e69446e8730, count: -6 ddb{0}> machine ddbcpu 1 Stopped at witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{1}> trace witness_checkorder(fffffd8076a69d90,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd8076a69d80) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002126bd38,fffffd8076a69d80,fffffd8076a69e08,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002126bd38,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002126bd38) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002126bd38,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002126bd38,ffff80002e427630,ffff80002e427680) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002e427700) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e427700) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7353764d2e40, count: -9