kernel: protection fault trap, code=0 Stopped at witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace witness_checkorder(fffffd806f2410e8,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f2410d8) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff800027b88d58,fffffd806f2410d8,fffffd806f241160,4,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800027b88d58,4) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800027b88d58) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800027b88d58,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800027b88d58,ffff800021293690,ffff8000212936e0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800021293760) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800021293760) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79e96c355840, count: -9 ddb{0}> show registers rdi 0 rsi 0x20000 acpi_pdirpa+0xbe63 rbp 0xffff800021293430 rbx 0xe rdx 0 rcx 0xffff800027b88d58 rax 0xffffffff82bc7ff0 cpu_info_full_primary+0x1ff0 r8 0x1 r9 0 r10 0xb9179c43a9ddc38f r11 0xb395d2975f0a4d35 r12 0 r13 0xfffffd806f2410e8 r14 0x1004808610008086 r15 0xffff800027b88d58 rip 0xffffffff81591c4c witness_checkorder+0x1ec cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800021293380 ss 0x10 witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{0}> show proc PROC (syz-executor.2) pid=324634 stat=onproc flags process=1018 proc=2000 pri=0, usrpri=71, nice=20 forw=0xffffffffffffffff, list=0xffff800027b89000,0xffff800027b89ab0 process=0xffff800021221930 user=0xffff80002128e000, vmspace=0xfffffd80759663c8 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 84416 58821 3526 32767 3 0x90 nanoslp syz-executor.6 84416 344125 3526 32767 3 0x4000090 fsleep syz-executor.6 21897 196945 15463 32767 2 0x10 syz-executor.0 21897 351998 15463 32767 2 0x4000010 syz-executor.0 21897 281657 15463 32767 2 0x4000010 syz-executor.0 39511 62194 87002 32767 2 0x10 syz-executor.5 39511 28881 87002 32767 7 0x4000010 syz-executor.5 19290 217460 75339 32767 3 0x90 nanoslp syz-executor.1 75339 126749 38708 0 3 0x82 wait syz-executor.1 39345 312932 33106 32767 3 0x90 nanoslp syz-executor.2 33106 463826 38708 0 3 0x82 wait syz-executor.2 15784 485909 11732 32767 2 0x10 syz-executor.3 11732 335537 38708 0 3 0x82 wait syz-executor.3 13644 518766 53331 32767 2 0x10 syz-executor.7 53331 79810 38708 0 3 0x82 wait syz-executor.7 87002 29304 63744 32767 3 0x90 nanoslp syz-executor.5 63744 377540 38708 0 3 0x82 wait syz-executor.5 3526 478211 76518 32767 3 0x90 nanoslp syz-executor.6 76518 302153 38708 0 3 0x82 wait syz-executor.6 15463 306100 78138 32767 3 0x90 nanoslp syz-executor.0 78138 165911 38708 0 3 0x82 wait syz-executor.0 41744 505691 0 0 3 0x14200 bored sosplice 58912 128617 97591 32767 2 0x10 syz-executor.4 97591 34035 38708 0 3 0x82 wait syz-executor.4 38708 272599 70046 0 3 0x2000082 thrsleep syz-fuzzer 38708 52476 70046 0 3 0x6000082 nanoslp syz-fuzzer 38708 242825 70046 0 3 0x6000082 thrsleep syz-fuzzer 38708 448562 70046 0 3 0x6000082 wait syz-fuzzer 38708 322088 70046 0 3 0x6000082 wait syz-fuzzer 38708 33755 70046 0 3 0x6000082 wait syz-fuzzer 38708 57804 70046 0 3 0x6000082 wait syz-fuzzer 38708 246353 70046 0 3 0x6000082 wait syz-fuzzer 38708 433343 70046 0 3 0x6000082 thrsleep syz-fuzzer 38708 126578 70046 0 3 0x6000082 kqread syz-fuzzer 38708 314935 70046 0 3 0x6000082 thrsleep syz-fuzzer 38708 337422 70046 0 3 0x6000082 thrsleep syz-fuzzer 38708 104631 70046 0 3 0x6000082 wait syz-fuzzer 38708 362335 70046 0 3 0x6000082 wait syz-fuzzer 38708 195229 70046 0 3 0x6000082 thrsleep syz-fuzzer 38708 197691 70046 0 3 0x6000082 wait syz-fuzzer 70046 58752 32139 0 3 0x10008a sigsusp ksh 32139 369182 12660 0 3 0x9a kqread sshd 40215 104777 1 0 3 0x100083 ttyin getty 12660 119068 1 0 3 0x88 kqread sshd 57670 131359 65147 73 3 0x1100090 kqread syslogd 65147 298299 1 0 3 0x100082 netio syslogd 71776 87321 1 0 3 0x100080 kqread resolvd 40900 447562 90245 77 3 0x100092 kqread dhcpleased 23999 438014 90245 77 3 0x100092 kqread dhcpleased 90245 79778 1 0 3 0x80 kqread dhcpleased 51858 319748 0 0 3 0x14200 bored smr 15615 99137 0 0 2 0x14200 zerothread 93863 456 0 0 3 0x14200 aiodoned aiodoned 86583 201262 0 0 3 0x14200 syncer update 73076 41724 0 0 3 0x14200 cleaner cleaner 57821 503055 0 0 2 0x14200 reaper 4818 491998 0 0 3 0x14200 pgdaemon pagedaemon 99427 247275 0 0 3 0x14200 bored viomb 98599 10077 0 0 3 0x40014200 acpi0 acpi0 44394 450004 0 0 3 0x40014200 idle1 12511 427306 0 0 3 0x14200 bored softnet3 42494 474115 0 0 3 0x14200 bored softnet2 72839 312493 0 0 3 0x14200 bored softnet1 35535 3488 0 0 3 0x14200 bored softnet0 5732 222861 0 0 3 0x14200 bored systqmp 84136 188885 0 0 3 0x14200 bored systq 8843 475557 0 0 3 0x40014200 bored softclock 17904 217492 0 0 3 0x40014200 idle0 1 397694 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 15784 (syz-executor.3) thread 0xffff80002120c2a8 (485909) exclusive rrwlock inode r = 0 (0xfffffd80698373d0) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x200 sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1314 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 #11 namei+0x55a sys/kern/vfs_lookup.c:250 #12 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #13 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #13 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806af2fe78) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #9 Xsyscall+0x128 Process 58912 (syz-executor.4) thread 0xffff8000212cad50 (128617) exclusive rrwlock inode r = 0 (0xfffffd806e40ce68) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x200 sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1314 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 #11 namei+0x55a sys/kern/vfs_lookup.c:250 #12 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #13 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #13 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8066f15e70) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10212 6412K 6420K 78643K 11366 0 pcb 13 12K 14K 78643K 17 0 rtable 244 6K 7K 78643K 3879 0 pf 29 8K 8K 78643K 79 0 ifaddr 44 15K 16K 78643K 150 0 ifgroup 50 2K 2K 78643K 150 0 sysctl 2 0K 0K 78643K 2 0 counters 60 35K 35K 78643K 110 0 ioctlops 0 0K 2K 78643K 141 0 iov 0 0K 18K 78643K 1199 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 9071 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 203 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1987 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 23 85K 121K 78643K 12369 0 sigio 0 0K 0K 78643K 219 0 proc 56 78K 115K 78643K 1836 0 subproc 104 6K 6K 78643K 429 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 415 0 in_multi 99 7K 7K 78643K 528 0 ether_multi 1 0K 0K 78643K 14 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 211 943K 943K 78643K 211 0 exec 0 0K 1K 78643K 2927 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 498 96K 109K 78643K 123000 0 UVM aobj 131 4K 4K 78643K 138 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 327 0 NDP 11 0K 2K 78643K 102 0 temp 74 5920K 6048K 78643K 33383 0 kqueue 12 18K 34K 78643K 1155 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> 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 3515 0 3511 36 34 2 4 0 8 1 rtentry 112 417 0 302 4 0 4 4 0 8 0 unpcb 144 13716 0 13703 141 140 1 10 0 8 0 syncache 304 86 0 86 21 20 1 1 0 8 1 tcpqe 32 177 0 177 15 15 0 1 0 8 0 tcpcb 808 4398 0 4387 146 144 2 17 0 8 0 arp 120 71 0 52 1 0 1 1 0 8 0 ipq 40 86 0 86 8 8 0 1 0 8 0 ipqe 40 405 0 405 8 8 0 1 0 8 0 inpcb 368 8178 0 8159 190 188 2 16 0 8 0 nd6 136 127 0 99 3 2 1 2 0 8 0 kcovpl 48 33 0 25 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1681 0 1214 35 5 30 30 0 8 0 art_table 32 1682 0 1214 4 0 4 4 0 8 0 art_node 16 416 0 311 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 1983 0 1973 1 0 1 1 0 8 0 shmpl 112 135 0 7 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 22564 0 21112 91 0 91 91 0 8 0 ffsino 272 22564 0 21112 98 0 98 98 0 8 0 nchpl 144 39066 0 37425 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 146858 0 146858 3 2 1 2 0 8 1 percpumem 16 68 0 25 1 0 1 1 0 8 0 kstatmem 264 72 0 50 2 0 2 2 0 8 0 scxspl 216 100087 0 100087 47 46 1 8 1 8 1 plimitpl 152 1759 0 1736 21 20 1 2 0 8 0 sigapl 424 12602 0 12549 8 1 7 7 0 8 0 futexpl 64 99821 0 99820 1 0 1 1 0 8 0 knotepl 120 951 0 0 13 3 10 11 0 8 0 kqueuepl 216 2729 0 2721 42 39 3 6 0 8 2 pipepl 320 2959 0 2931 80 77 3 8 0 8 0 fdescpl 496 12584 0 12550 6 0 6 6 0 8 0 filepl 152 106773 0 106533 177 164 13 20 0 8 3 lockfpl 104 2265 0 2263 2 1 1 2 0 8 0 lockfspl 48 675 0 673 1 0 1 1 0 8 0 sessionpl 144 48 0 32 1 0 1 1 0 8 0 pgrppl 48 246 0 230 1 0 1 1 0 8 0 ucredpl 104 37947 0 37929 1 0 1 1 0 8 0 zombiepl 144 12552 0 12549 1 0 1 1 0 8 0 processpl 1072 12602 0 12549 5 1 4 5 0 8 0 procpl 680 34510 0 34437 38 30 8 9 0 8 1 sosppl 168 239 0 239 26 25 1 1 0 8 1 sockpl 488 25890 0 25857 675 665 10 35 0 8 5 mcl64k 65536 25 0 0 3 0 3 3 0 8 0 mcl16k 16384 25 0 0 3 0 3 3 0 8 0 mcl12k 12288 33 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 26 0 0 3 0 3 3 0 8 0 mcl4k 4096 64 0 0 4 1 3 4 0 8 0 mcl2k2 2112 13 0 0 1 0 1 1 0 8 0 mcl2k 2048 427 0 0 33 18 15 33 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 1696 0 0 77 0 77 77 0 8 0 bufpl 288 22094 0 15766 453 0 453 453 0 8 0 anonpl 24 1403305 0 1391918 216 122 94 97 0 186 0 amapchunkpl 152 394127 0 393244 125 86 39 50 0 158 2 amappl16 200 35012 0 34715 236 218 18 31 0 8 0 amappl15 192 16 0 16 1 1 0 1 0 8 0 amappl14 184 228 0 214 2 1 1 2 0 8 0 amappl13 176 24 0 24 7 7 0 1 0 8 0 amappl12 168 13586 0 13551 3 1 2 2 0 8 0 amappl11 160 83 0 70 1 0 1 1 0 8 0 amappl10 152 93 0 81 1 0 1 1 0 8 0 amappl9 144 310 0 309 1 0 1 1 0 8 0 amappl8 136 965 0 747 8 0 8 8 0 8 0 amappl7 128 160 0 146 2 0 2 2 0 8 0 amappl6 120 519 0 493 2 1 1 2 0 8 0 amappl5 112 670 0 661 1 0 1 1 0 8 0 amappl4 104 1019 0 977 7 5 2 2 0 8 0 amappl3 96 76494 0 76403 4 1 3 3 0 8 0 amappl2 88 13658 0 13575 3 1 2 3 0 8 0 amappl1 80 52852 0 52324 22 9 13 22 0 8 0 amappl 88 121803 0 121538 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 72 137 0 7 3 0 3 3 0 8 0 uaddrrnd 24 12584 0 12550 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 12584 0 12550 1 0 1 1 0 8 0 vmmpekpl 168 100550 0 100491 3 0 3 3 0 8 0 vmmpepl 168 752882 0 750364 271 148 123 150 0 357 0 vmsppl 464 12583 0 12550 7 2 5 6 0 8 0 rwobjpl 56 197558 0 190035 116 6 110 110 0 8 0 pdppl 4096 25176 0 25100 572 490 82 94 0 8 6 pvpl 32 3645575 0 3627858 461 288 173 351 0 265 0 pmappl 248 12583 0 12550 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1756 0 880 27 0 27 27 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace witness_checkorder(fffffd806f2410e8,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f2410d8) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff800027b88d58,fffffd806f2410d8,fffffd806f241160,4,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff800027b88d58,4) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff800027b88d58) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff800027b88d58,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff800027b88d58,ffff800021293690,ffff8000212936e0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800021293760) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800021293760) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79e96c355840, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020d58ff0) 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(ffff80002e41d5c0) at syscall+0x5cd mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e41d5c0) at syscall+0x5cd sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x20d20e3b3e0, count: -6