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(fffffd806f0350e8,9,0) at witness_checkorder+0x4f5 witness_lock_order_check sys/kern/subr_witness.c:2442 [inline] witness_checkorder(fffffd806f0350e8,9,0) at witness_checkorder+0x4f5 sys/kern/subr_witness.c:890 mtx_enter(fffffd806f0350d8) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002124b298,fffffd806f0350d8,fffffd806f035160,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002124b298,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002124b298) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002124b298,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002124b298,ffff8000295ad350,ffff8000295ad3a0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000295ad420) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000295ad420) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6fb6bef09380, count: -9 ddb{1}> show registers rdi 0xffffffff rsi 0xffffffff rbp 0xffff8000295ad0f0 rbx 0xffffffff rdx 0 rcx 0xc rax 0xfffffd80031ef000 r8 0x1 r9 0x1 r10 0x8e7e54faacde521b r11 0xcbbdfd07c5a20623 r12 0xfffffd80031c7300 r13 0xfffffd806f0350e8 r14 0xdeafbeaddeafbead r15 0xfffffd80039b5e08 rip 0xffffffff81f47f95 witness_checkorder+0x4f5 cs 0x8 rflags 0x10216 __ALIGN_SIZE+0xf216 rsp 0xffff8000295ad040 ss 0 witness_checkorder+0x4f5: movl 0x10(%r14),%ecx ddb{1}> show proc PROC (syz-executor.2) pid=139780 stat=onproc flags process=1008 proc=2000 pri=0, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800024743a98,0xffff80002124a010 process=0xffff8000212a69f8 user=0xffff8000295a8000, vmspace=0xfffffd8069a7a1e8 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 51825 199247 69806 0 2 0 syz-executor.3 51825 28984 69806 0 2 0x4000000 syz-executor.3 54910 202622 51701 0 2 0 syz-executor.6 46587 241444 51563 0 2 0 syz-executor.5 46587 208162 51563 0 3 0x4000080 fsleep syz-executor.5 46587 200143 51563 0 2 0x4000000 syz-executor.5 29952 96528 36787 0 2 0 syz-executor.4 29952 170366 36787 0 7 0x4000000 syz-executor.4 5013 508779 54185 0 2 0x2 syz-executor.7 51701 515589 54185 0 3 0x82 nanoslp syz-executor.6 51563 96267 54185 0 3 0x82 nanoslp syz-executor.5 68085 391371 54185 0 3 0x82 nanoslp syz-executor.2 36787 254444 54185 0 3 0x82 nanoslp syz-executor.4 69806 437549 54185 0 2 0x2 syz-executor.3 30948 419531 54185 0 2 0x2 syz-executor.1 12055 494073 54185 0 3 0x2 biowait syz-executor.0 54185 224896 92969 0 3 0x2000082 thrsleep syz-fuzzer 54185 42105 92969 0 3 0x6000082 thrsleep syz-fuzzer 54185 194945 92969 0 3 0x6000082 wait syz-fuzzer 54185 155219 92969 0 3 0x6000082 wait syz-fuzzer 54185 90007 92969 0 3 0x6000082 wait syz-fuzzer 54185 495107 92969 0 3 0x6000082 thrsleep syz-fuzzer 54185 122351 92969 0 3 0x6000082 wait syz-fuzzer 54185 425755 92969 0 3 0x6000082 wait syz-fuzzer 54185 370992 92969 0 3 0x6000082 wait syz-fuzzer 54185 207029 92969 0 3 0x6000082 wait syz-fuzzer 54185 27045 92969 0 3 0x6000082 thrsleep syz-fuzzer 54185 134977 92969 0 3 0x6000082 wait syz-fuzzer 54185 107686 92969 0 3 0x6000082 thrsleep syz-fuzzer 54185 81708 92969 0 3 0x6000082 thrsleep syz-fuzzer 54185 238080 92969 0 3 0x6000082 thrsleep syz-fuzzer 54185 514478 92969 0 3 0x6000082 kqread syz-fuzzer 92969 23715 94810 0 3 0x10008a sigsusp ksh 94810 512525 84437 0 3 0x9a kqread sshd 35751 73867 1 0 3 0x100083 ttyin getty 84437 449507 1 0 3 0x88 kqread sshd 29455 492182 69774 74 3 0x1100092 bpf pflogd 69774 510541 1 0 3 0x80 netio pflogd 60604 300482 21441 73 3 0x1100090 kqread syslogd 21441 27659 1 0 3 0x100082 netio syslogd 85585 256726 1 0 3 0x100080 kqread resolvd 1528 41809 11249 77 3 0x100092 kqread dhcpleased 59043 110149 11249 77 3 0x100092 kqread dhcpleased 11249 447703 1 0 3 0x80 kqread dhcpleased 58561 243876 0 0 3 0x14200 bored smr 6857 409401 0 0 2 0x14200 zerothread 450 215788 0 0 3 0x14200 aiodoned aiodoned 28976 1985 0 0 3 0x14200 syncer update 99259 365583 0 0 3 0x14200 cleaner cleaner 23958 113465 0 0 2 0x14200 reaper 62328 18042 0 0 3 0x14200 pgdaemon pagedaemon 28252 511167 0 0 3 0x14200 bored viomb 6343 428889 0 0 3 0x40014200 acpi0 acpi0 23498 419936 0 0 3 0x40014200 idle1 71444 32201 0 0 3 0x14200 bored softnet3 93885 479579 0 0 3 0x14200 bored softnet2 24916 190769 0 0 3 0x14200 bored softnet1 49254 2493 0 0 3 0x14200 bored softnet0 58119 131844 0 0 3 0x14200 bored systqmp 14971 311993 0 0 3 0x14200 bored systq 96667 82005 0 0 3 0x40014200 bored softclock 74942 136520 0 0 3 0x40014200 idle0 1 331403 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 12055 (syz-executor.0) thread 0xffff800021201010 (494073) exclusive rrwlock inode r = 0 (0xfffffd8078d9fd60) #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 (0xfffffd8069ecb1b0) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10190 6488K 14823K 78643K 75947 0 pcb 14 12K 13K 78643K 321 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 5283 0 iov 0 0K 8K 78643K 1154 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1482 93K 93K 78643K 54020 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 512 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 753 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 15 53K 93K 78643K 61586 0 sigio 0 0K 0K 78643K 4018 0 proc 68 91K 115K 78643K 527 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 25 122K 122K 78643K 25 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 342 81K 82K 78643K 542519 0 UVM aobj 131 4K 4K 78643K 680 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 12 0K 2K 78643K 28 0 temp 74 5920K 6048K 78643K 190884 0 kqueue 12 18K 30K 78643K 4972 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 36931 0 36916 157 151 6 10 0 8 5 syncache 304 4 0 4 1 1 0 1 0 8 0 tcpqe 32 193 0 193 1 1 0 1 0 8 0 tcpcb 808 210 0 206 10 9 1 7 0 8 0 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 368 1229 0 1221 26 25 1 7 0 8 0 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 75 0 72 2 1 1 2 0 482 0 pffrnode 88 65 0 62 1 0 1 1 0 8 0 pffrent 40 1381 0 1378 1 0 1 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 24 123 0 113 1 0 1 1 0 8 0 pfstkey 128 123 0 113 1 0 1 1 0 8 0 pfstate 376 123 0 113 7 5 2 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 256 453 0 0 29 0 29 29 0 8 0 art_table 32 454 0 0 4 0 4 4 0 8 0 art_node 16 110 0 10 1 0 1 1 0 8 0 semapl 112 751 0 741 1 0 1 1 0 8 0 shmpl 112 677 0 549 6 2 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 64815 0 63365 91 0 91 91 0 8 0 ffsino 272 64815 0 63365 98 0 98 98 0 8 0 nchpl 144 136178 0 134490 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 354789 0 354788 2 1 1 2 0 8 0 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 384537 0 384536 33 31 2 8 1 8 1 plimitpl 152 1731 0 1715 1 0 1 1 0 8 0 sigapl 424 61909 0 61863 8 2 6 7 0 8 0 futexpl 64 307179 0 307178 1 0 1 1 0 8 0 knotepl 120 324 0 0 6 1 5 6 0 8 0 kqueuepl 216 9372 0 9364 46 45 1 5 0 8 0 pipepl 320 142 0 114 3 0 3 3 0 8 0 fdescpl 496 61892 0 61864 5 1 4 5 0 8 0 filepl 152 196419 0 196177 235 217 18 20 0 8 8 lockfpl 104 7543 0 7541 12 11 1 2 0 8 0 lockfspl 48 2257 0 2255 1 0 1 1 0 8 0 sessionpl 144 24 0 7 1 0 1 1 0 8 0 pgrppl 48 533 0 516 1 0 1 1 0 8 0 ucredpl 104 854 0 842 1 0 1 1 0 8 0 zombiepl 144 61865 0 61863 1 0 1 1 0 8 0 processpl 1072 61909 0 61863 4 0 4 4 0 8 0 procpl 680 139914 0 139848 14 7 7 8 0 8 0 sockpl 488 38197 0 38171 649 637 12 34 0 8 8 mcl64k 65536 39 0 0 4 1 3 3 0 8 0 mcl16k 16384 33 0 0 5 2 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 57 0 0 4 2 2 2 0 8 0 mcl8k 8192 41 0 0 5 2 3 3 0 8 0 mcl4k 4096 70 0 0 4 2 2 3 0 8 0 mcl2k2 2112 25 0 0 2 0 2 2 0 8 1 mcl2k 2048 410 0 0 37 20 17 37 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 1483 0 0 20 4 16 20 0 8 1 bufpl 288 65762 0 59430 453 0 453 453 0 8 0 anonpl 24 4264951 0 4256957 71 20 51 58 0 186 0 amapchunkpl 152 1699635 0 1698894 149 116 33 35 0 158 3 amappl16 200 60659 0 60503 9 0 9 9 0 8 0 amappl15 192 14 0 14 2 2 0 1 0 8 0 amappl14 184 200 0 184 2 1 1 2 0 8 0 amappl13 176 22 0 21 1 0 1 1 0 8 0 amappl12 168 62588 0 62556 4 2 2 3 0 8 0 amappl11 160 72 0 58 1 0 1 1 0 8 0 amappl10 152 23 0 12 1 0 1 1 0 8 0 amappl9 144 286 0 285 2 1 1 1 0 8 0 amappl8 136 929 0 817 4 0 4 4 0 8 0 amappl7 128 252 0 238 2 0 2 2 0 8 0 amappl6 120 479 0 461 2 1 1 2 0 8 0 amappl5 112 1218 0 1206 1 0 1 1 0 8 0 amappl4 104 2380 0 2334 3 1 2 3 0 8 0 amappl3 96 342271 0 342186 7 4 3 4 0 8 0 amappl2 88 63864 0 63794 3 1 2 3 0 8 0 amappl1 80 212681 0 212123 23 10 13 23 0 8 0 amappl 88 540397 0 540200 7 1 6 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 72 679 0 549 4 1 3 3 0 8 0 uaddrrnd 24 61892 0 61864 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 61892 0 61864 1 0 1 1 0 8 0 vmmpekpl 168 306091 0 306048 3 0 3 3 0 8 0 vmmpepl 168 3267223 0 3265156 201 103 98 119 0 357 3 vmsppl 464 61891 0 61864 5 1 4 5 0 8 0 rwobjpl 56 675184 0 667835 107 2 105 105 0 8 0 pdppl 4096 123792 0 123728 1828 1758 70 84 0 8 6 pvpl 32 14544210 0 14530363 444 324 120 365 0 265 0 pmappl 248 61891 0 61864 3 1 2 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2633 0 1833 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(ffff80002c9ded00,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 vn_ioctl(fffffd806b7faad0,8004667c,ffff80002c9def50,ffff80002124a000) at vn_ioctl+0x45 sys/kern/vfs_vnops.c:508 sys_fcntl(ffff80002124a000,ffff80002c9defd0,ffff80002c9df020) at sys_fcntl+0x512 syscall(ffff80002c9df0a0) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002c9df0a0) at syscall+0x606 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f6a57af100, count: -11 ddb{0}> machine ddbcpu 1 Stopped at witness_checkorder+0x4f5: movl 0x10(%r14),%ecx ddb{1}> trace witness_checkorder(fffffd806f0350e8,9,0) at witness_checkorder+0x4f5 witness_lock_order_check sys/kern/subr_witness.c:2442 [inline] witness_checkorder(fffffd806f0350e8,9,0) at witness_checkorder+0x4f5 sys/kern/subr_witness.c:890 mtx_enter(fffffd806f0350d8) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002124b298,fffffd806f0350d8,fffffd806f035160,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002124b298,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002124b298) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002124b298,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002124b298,ffff8000295ad350,ffff8000295ad3a0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000295ad420) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000295ad420) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6fb6bef09380, count: -9