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(fffffd807e85b7a8,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd807e85b798) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002121a020,fffffd807e85b798,fffffd807e85b820,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121a020,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121a020) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121a020,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121a020,ffff80002e41d050,ffff80002e41d0a0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002e41d120) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e41d120) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70651b567730, count: -9 ddb{0}> show registers rdi 0 rsi 0x20000 acpi_pdirpa+0xbe63 rbp 0xffff80002e41cdf0 rbx 0xe rdx 0 rcx 0xffff80002121a020 rax 0xffffffff82bc7ff0 cpu_info_full_primary+0x1ff0 r8 0x1 r9 0 r10 0xde5c2eb2d4a4ad5b r11 0xcb33edde1aa80bf5 r12 0 r13 0xfffffd807e85b7a8 r14 0x1004808610008086 r15 0xffff80002121a020 rip 0xffffffff81591c4c witness_checkorder+0x1ec cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e41cd40 ss 0x10 witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{0}> show proc PROC (syz-executor.7) pid=206649 stat=onproc flags process=1018 proc=2000 pri=0, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80002121a818,0xffff80002121b020 process=0xffff8000ffffb678 user=0xffff80002e418000, vmspace=0xfffffd8069b78760 estcpu=36, cpticks=3, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 40843 138790 73628 32767 7 0x10 syz-executor.2 40843 237640 73628 32767 2 0x4000010 syz-executor.2 99013 78104 32668 32767 3 0x90 nanoslp syz-executor.0 99013 353444 32668 32767 3 0x4000090 fsleep syz-executor.0 99013 210749 32668 32767 3 0x4000090 fsleep syz-executor.0 99013 181320 32668 32767 3 0x4000090 fsleep syz-executor.0 98785 413823 89807 32767 2 0x10 syz-executor.5 98785 220068 89807 32767 3 0x4000090 fsleep syz-executor.5 98785 368550 89807 32767 3 0x4000090 fsleep syz-executor.5 22929 174246 98424 32767 3 0x90 nanoslp syz-executor.7 98424 180153 86986 0 3 0x82 wait syz-executor.7 25439 4128 4392 32767 3 0x90 nanoslp syz-executor.3 4392 327758 86986 0 3 0x82 wait syz-executor.3 58862 77952 86863 32767 3 0x90 nanoslp syz-executor.1 86863 188576 86986 0 3 0x82 wait syz-executor.1 32668 469741 5054 32767 3 0x90 nanoslp syz-executor.0 5054 336787 86986 0 3 0x82 wait syz-executor.0 89807 28824 39117 32767 3 0x90 nanoslp syz-executor.5 39117 175625 86986 0 3 0x82 wait syz-executor.5 76237 180261 37971 32767 2 0x10 syz-executor.6 37971 290513 86986 0 3 0x82 wait syz-executor.6 39365 135970 0 0 3 0x14200 bored sosplice 49554 92355 74106 32767 2 0x10 syz-executor.4 74106 81935 86986 0 3 0x82 wait syz-executor.4 73628 287995 84102 32767 3 0x90 nanoslp syz-executor.2 84102 40818 86986 0 3 0x82 wait syz-executor.2 86986 281201 89534 0 3 0x2000082 wait syz-fuzzer 86986 515972 89534 0 3 0x6000082 thrsleep syz-fuzzer 86986 396553 89534 0 3 0x6000082 thrsleep syz-fuzzer 86986 130221 89534 0 3 0x6000082 thrsleep syz-fuzzer 86986 503295 89534 0 3 0x6000082 wait syz-fuzzer 86986 328988 89534 0 3 0x6000082 thrsleep syz-fuzzer 86986 93640 89534 0 3 0x6000082 wait syz-fuzzer 86986 515414 89534 0 3 0x6000082 thrsleep syz-fuzzer 86986 151734 89534 0 3 0x6000082 wait syz-fuzzer 86986 61402 89534 0 3 0x6000082 wait syz-fuzzer 86986 356935 89534 0 3 0x6000082 thrsleep syz-fuzzer 86986 278692 89534 0 3 0x6000082 thrsleep syz-fuzzer 86986 61178 89534 0 3 0x6000082 wait syz-fuzzer 86986 128598 89534 0 3 0x6000082 wait syz-fuzzer 86986 277043 89534 0 3 0x6000082 kqread syz-fuzzer 86986 481919 89534 0 3 0x6000082 wait syz-fuzzer 89534 241351 4127 0 3 0x10008a sigsusp ksh 4127 1956 53673 0 3 0x9a kqread sshd 63342 193787 1 0 3 0x100083 ttyin getty 53673 491525 1 0 3 0x88 kqread sshd 90318 455906 94723 73 3 0x1100090 kqread syslogd 94723 401386 1 0 3 0x100082 netio syslogd 80126 517282 1 0 3 0x100080 kqread resolvd 54725 419326 80928 77 3 0x100092 kqread dhcpleased 98539 15754 80928 77 3 0x100092 kqread dhcpleased 80928 456678 1 0 3 0x80 kqread dhcpleased 90136 316923 0 0 3 0x14200 bored smr 4026 117994 0 0 2 0x14200 zerothread 67051 293584 0 0 3 0x14200 aiodoned aiodoned 23877 25736 0 0 3 0x14200 syncer update 92178 245819 0 0 3 0x14200 cleaner cleaner 63688 282223 0 0 2 0x14200 reaper 53026 131274 0 0 3 0x14200 pgdaemon pagedaemon 42853 17349 0 0 3 0x14200 bored viomb 96081 83445 0 0 3 0x40014200 acpi0 acpi0 53414 165826 0 0 3 0x40014200 idle1 86726 382396 0 0 3 0x14200 bored softnet3 22030 325491 0 0 3 0x14200 bored softnet2 11047 308459 0 0 3 0x14200 bored softnet1 22888 115108 0 0 3 0x14200 bored softnet0 83114 190021 0 0 3 0x14200 bored systqmp 97688 416863 0 0 3 0x14200 bored systq 95221 301546 0 0 3 0x40014200 bored softclock 15953 272615 0 0 3 0x40014200 idle0 1 79972 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 76237 (syz-executor.6) thread 0xffff80002121b560 (180261) exclusive rrwlock inode r = 0 (0xfffffd8066be7920) #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 (0xfffffd8068207818) #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 49554 (syz-executor.4) thread 0xffff80002121a2c8 (92355) exclusive rrwlock inode r = 0 (0xfffffd8069c68f78) #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 ufs_ihashins+0x46 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1343 #6 ffs_inode_alloc+0x1c2 sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf8 sys/ufs/ufs/ufs_vnops.c:1149 #8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3073 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8068207e78) #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 domkdirat+0x79 sys/kern/vfs_syscalls.c:3058 #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 10211 6412K 6420K 78643K 11371 0 pcb 13 16K 18K 78643K 19 0 rtable 242 6K 7K 78643K 2648 0 pf 29 8K 8K 78643K 83 0 ifaddr 44 15K 16K 78643K 158 0 ifgroup 50 2K 2K 78643K 158 0 sysctl 3 1K 1K 78643K 3 0 counters 60 35K 35K 78643K 114 0 ioctlops 0 0K 2K 78643K 315 0 iov 0 0K 20K 78643K 2981 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 4596 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 308 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 1444 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 22 81K 121K 78643K 17368 0 sigio 0 0K 0K 78643K 2087 0 proc 56 78K 115K 78643K 2203 0 subproc 104 6K 6K 78643K 455 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 760 0 in_multi 99 7K 7K 78643K 536 0 ether_multi 1 0K 0K 78643K 1 0 mrt 1 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 205 917K 917K 78643K 205 0 exec 0 0K 1K 78643K 2149 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 483 94K 110K 78643K 173407 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 407 0 NDP 11 0K 2K 78643K 108 0 temp 74 5920K 6048K 78643K 45298 0 kqueue 14 22K 34K 78643K 1433 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 3648 0 3645 46 43 3 6 0 8 2 rtentry 112 436 0 322 4 0 4 4 0 8 0 unpcb 144 19104 0 19007 150 143 7 11 0 8 3 syncache 304 131 0 131 29 28 1 1 0 8 1 tcpqe 32 355 0 355 24 24 0 1 0 8 0 tcpcb 808 6015 0 5991 150 141 9 16 0 8 3 arp 120 76 0 57 1 0 1 1 0 8 0 ipq 40 33 0 29 10 9 1 1 0 8 0 ipqe 40 124 0 117 10 9 1 1 0 8 0 inpcb 368 25556 0 25523 207 195 12 24 0 8 4 nd6 136 129 0 102 4 2 2 2 0 8 0 kcovpl 48 35 0 27 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1757 0 1293 34 4 30 30 0 8 0 art_table 32 1758 0 1293 4 0 4 4 0 8 0 art_node 16 435 0 331 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 2 1 0 1 1 0 8 0 semapl 112 1440 0 1430 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 24355 0 22909 91 0 91 91 0 8 0 ffsino 272 24355 0 22909 97 0 97 97 0 8 0 nchpl 144 47082 0 45440 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 149581 0 149580 7 6 1 2 0 8 0 percpumem 16 70 0 27 1 0 1 1 0 8 0 kstatmem 264 76 0 54 2 0 2 2 0 8 0 scxspl 216 142555 0 142555 43 42 1 8 1 8 1 plimitpl 152 2737 0 2714 19 18 1 2 0 8 0 sigapl 424 17602 0 17549 7 0 7 7 0 8 0 futexpl 64 141986 0 141981 4 3 1 1 0 8 0 knotepl 120 834 0 0 17 1 16 17 0 8 0 kqueuepl 216 4160 0 4148 90 85 5 12 0 8 4 pipepl 320 4011 0 3983 102 99 3 11 0 8 0 fdescpl 496 17584 0 17551 7 2 5 6 0 8 0 filepl 152 124253 0 123924 225 209 16 25 0 8 3 lockfpl 104 4209 0 4207 4 3 1 2 0 8 0 lockfspl 48 1479 0 1477 1 0 1 1 0 8 0 sessionpl 144 50 0 34 1 0 1 1 0 8 0 pgrppl 48 295 0 279 1 0 1 1 0 8 0 ucredpl 104 16563 0 16545 1 0 1 1 0 8 0 zombiepl 144 17552 0 17549 1 0 1 1 0 8 0 processpl 1072 17602 0 17549 5 1 4 5 0 8 0 procpl 680 48885 0 48810 37 29 8 9 0 8 1 sosppl 168 327 0 325 18 17 1 1 0 8 0 sockpl 488 48919 0 48789 760 734 26 40 0 8 9 mcl64k 65536 44 0 0 3 0 3 3 0 8 0 mcl16k 16384 33 0 0 4 1 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 38 0 0 4 1 3 3 0 8 0 mcl4k 4096 73 0 0 4 1 3 4 0 8 0 mcl2k2 2112 10 0 0 1 0 1 1 0 8 0 mcl2k 2048 403 0 0 32 15 17 32 0 8 0 mtagpl 96 71 0 0 2 0 2 2 0 8 0 mbufpl 256 1725 0 0 61 1 60 61 0 8 0 bufpl 288 31548 0 25223 453 1 452 453 0 8 0 anonpl 24 1785381 0 1773121 243 148 95 106 0 186 0 amapchunkpl 152 545986 0 545102 143 103 40 56 0 158 2 amappl16 200 40380 0 40095 294 270 24 30 0 8 8 amappl15 192 20 0 19 2 1 1 1 0 8 0 amappl14 184 241 0 225 2 1 1 2 0 8 0 amappl13 176 14 0 14 3 3 0 1 0 8 0 amappl12 168 18598 0 18561 2 0 2 2 0 8 0 amappl11 160 74 0 61 1 0 1 1 0 8 0 amappl10 152 101 0 83 1 0 1 1 0 8 0 amappl9 144 383 0 383 25 24 1 1 0 8 1 amappl8 136 1283 0 1040 10 1 9 9 0 8 0 amappl7 128 178 0 161 1 0 1 1 0 8 0 amappl6 120 641 0 612 2 1 1 2 0 8 0 amappl5 112 805 0 795 1 0 1 1 0 8 0 amappl4 104 1142 0 1092 2 0 2 2 0 8 0 amappl3 96 107439 0 107348 6 3 3 4 0 8 0 amappl2 88 18633 0 18545 6 3 3 3 0 8 0 amappl1 80 69597 0 69071 22 9 13 22 0 8 0 amappl 88 171344 0 171087 8 1 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 17584 0 17551 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 17584 0 17551 1 0 1 1 0 8 0 vmmpekpl 168 139246 0 139192 3 0 3 3 0 8 0 vmmpepl 168 1031600 0 1029104 273 146 127 133 0 357 0 vmsppl 464 17583 0 17551 7 2 5 6 0 8 0 rwobjpl 56 261083 0 253517 120 9 111 111 0 8 0 pdppl 4096 35176 0 35102 637 555 82 94 0 8 8 pvpl 32 5048573 0 5029915 641 462 179 348 0 265 12 pmappl 248 17583 0 17551 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1828 0 952 26 0 26 26 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace witness_checkorder(fffffd807e85b7a8,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd807e85b798) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002121a020,fffffd807e85b798,fffffd807e85b820,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121a020,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121a020) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121a020,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121a020,ffff80002e41d050,ffff80002e41d0a0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002e41d120) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e41d120) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70651b567730, 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 end of kernel end trace frame: 0x7ddcf5bbb570, count: -3