kernel: protection fault trap, code=0 Stopped at witness_checkorder+0xa9: movl 0x18(%r14),%r15d 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(deadbeefdeadc00f,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:775 mtx_enter(deadbeefdeadbfff) at mtx_enter+0x47 sys/kern/kern_lock.c:238 prsignal(deadbeefdeadbeef,14) at prsignal+0x36 sys/kern/kern_sig.c:909 reaper(ffff80002a2f9718) at reaper+0x32c sys/kern/kern_exit.c:492 end trace frame: 0x0, count: -4 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a309550 rbx 0 rdx 0 rcx 0xffff80002a2f9718 rax 0xffffffff837f8ff0 cpu_info_full_primary+0x1ff0 r8 0x7f7fffffc000 r9 0 r10 0xae97d9b01ed9402 r11 0x314899d0f1179f17 r12 0 r13 0x1 r14 0xdeadbeefdeadc00f r15 0x3 rip 0xffffffff81d05429 witness_checkorder+0xa9 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a3094a0 ss 0x10 witness_checkorder+0xa9: movl 0x18(%r14),%r15d ddb{0}> show proc PROC (reaper) tid=215496 pid=52032 tcnt=1 stat=onproc flags process=14000 proc=200 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2f99a8,0xffff80002a2f8f78 process=0xffff80002a301700 user=0xffff80002a304000, vmspace=0xffffffff83924d18 estcpu=0, cpticks=1, pctcpu=0.33, user=0, sys=60, intr=1 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 64013 469361 57698 32767 2 0x10 syz-executor 64013 44745 57698 32767 3 0x4000090 fsleep syz-executor 16402 7372 35868 32767 2 0x10 syz-executor 16402 147866 35868 32767 3 0x4000090 kqread syz-executor 16402 6179 35868 32767 2 0x4000010 syz-executor 50398 152726 0 0 3 0x14200 bored sosplice 9516 85641 52787 32767 2 0x490 syz-executor 35868 278561 51933 32767 2 0x490 syz-executor 911 426836 17472 32767 7 0x10 syz-executor 56135 519420 11462 32767 3 0x90 nanoslp syz-executor 63007 301879 20042 32767 3 0x90 piperd syz-executor 57698 340430 73376 32767 3 0x90 nanoslp syz-executor 64770 80109 75942 32767 3 0x90 piperd syz-executor 17472 176999 52265 0 3 0x82 wait syz-executor 51933 51312 52265 0 3 0x82 wait syz-executor 11462 262527 52265 0 3 0x82 wait syz-executor 20042 260776 52265 0 3 0x82 wait syz-executor 73376 487400 52265 0 3 0x82 wait syz-executor 52787 27904 52265 0 3 0x82 wait syz-executor 75942 410216 52265 0 3 0x82 wait syz-executor 52265 325299 5781 0 3 0x82 nanoslp syz-executor 5781 142911 82532 0 3 0x10008a sigsusp ksh 82532 123012 69384 0 3 0x98 kqread sshd-session 69384 181836 89795 0 3 0x92 kqread sshd-session 65943 458699 1 0 3 0x100083 ttyin getty 89795 487819 1 0 3 0x88 kqread sshd 97962 363278 50743 73 3 0x1100090 kqread syslogd 50743 218979 1 0 3 0x100082 sbwait syslogd 20075 385187 1 0 3 0x100080 kqread resolvd 81589 455921 3840 77 3 0x100092 kqread dhcpleased 73246 471720 3840 77 3 0x100092 kqread dhcpleased 3840 15920 1 0 3 0x80 kqread dhcpleased 41076 409570 0 0 3 0x14200 bored smr 7615 262564 0 0 2 0x14200 zerothread 67607 198207 0 0 3 0x14200 aiodoned aiodoned 78080 194639 0 0 3 0x14200 syncer update 46174 97901 0 0 3 0x14200 cleaner cleaner *52032 215496 0 0 7 0x14200 reaper 34542 333360 0 0 3 0x14200 pgdaemon pagedaemon 49516 515984 0 0 3 0x14200 bored viomb 8849 36522 0 0 3 0x40014200 acpi0 acpi0 82261 427377 0 0 3 0x40014200 idle1 54700 207343 0 0 3 0x14200 bored softnet3 48064 313369 0 0 3 0x14200 bored softnet2 12748 449134 0 0 3 0x14200 bored softnet1 35352 273960 0 0 3 0x14200 bored softnet0 58619 319676 0 0 3 0x14200 bored systqmp 42756 455402 0 0 3 0x14200 bored systq 77756 386157 0 0 3 0x14200 tmoslp softclockmp 91275 459374 0 0 3 0x40014200 tmoslp softclock 9865 396674 0 0 3 0x40014200 idle0 1 65348 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 911 (syz-executor) thread 0xffff8000ffff67d0 (426836) exclusive rrwlock inode r = 0 (0xfffffd807beed970) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3117 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806ced0bc8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3102 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 52032 (reaper) thread 0xffff80002a2f9718 (215496) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839908e0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 __mp_acquire_count+0x58 #2 mi_switch+0x4b7 sys/kern/sched_bsd.c:441 #3 sleep_finish+0x24f sys/kern/kern_synch.c:414 #4 rw_do_enter_write+0x1de sys/kern/kern_rwlock.c:292 #5 knote_processexit+0x2b sys/kern/kern_event.c:2063 #6 reaper+0x2ad sys/kern/kern_exit.c:489 #7 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10185 10952K 10966K 166960K 11267 0 pcb 17 12K 12K 166960K 17 0 rtable 216 6K 6K 166960K 416 0 pf 29 16K 16K 166960K 31 0 ifaddr 38 6K 7K 166960K 44 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 2 1K 1K 166960K 2 0 counters 62 36K 36K 166960K 64 0 ioctlops 0 0K 2K 166960K 30 0 iov 0 0K 6K 166960K 4 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1333 84K 84K 166960K 1445 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 8 0K 0K 166960K 8 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 20 73K 121K 166960K 285 0 sigio 0 0K 0K 166960K 1 0 proc 58 79K 115K 166960K 482 0 subproc 63 3K 4K 166960K 162 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 28 0 in_multi 88 6K 7K 166960K 105 0 ether_multi 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 353 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 202 64K 74K 166960K 3717 0 UVM aobj 6 2K 2K 166960K 6 0 pinsyscall 41 82K 110K 166960K 1280 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 8 0 NDP 10 0K 2K 166960K 27 0 temp 32 8642K 8706K 166960K 4227 0 kqueue 15 22K 27K 166960K 48 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 39 0 36 1 0 1 1 0 8 0 rtentry 112 114 0 13 4 0 4 4 0 8 0 unpcb 144 102 0 78 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 808 48 0 43 1 0 1 1 0 8 0 arp 120 18 0 2 1 0 1 1 0 8 0 inpcb 376 160 0 152 2 0 2 2 0 8 1 nd6 136 27 0 4 1 0 1 1 0 8 0 kcovpl 48 18 0 11 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 459 0 46 29 0 29 29 0 8 1 art_table 32 460 0 46 4 0 4 4 0 8 0 art_node 16 113 0 21 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semapl 112 6 0 0 1 0 1 1 0 8 0 shmpl 112 3 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1697 0 184 95 0 95 95 0 8 0 ffsino 280 1697 0 184 109 0 109 109 0 8 0 nchpl 144 2013 0 331 63 0 63 63 0 8 0 uvmvnodes 80 1868 0 0 39 0 39 39 0 8 0 vnodes 216 1868 0 0 104 0 104 104 0 8 0 namei 1024 6133 0 6132 1 0 1 1 0 8 0 percpumem 16 46 0 1 1 0 1 1 0 8 0 kstatmem 264 22 0 2 2 0 2 2 0 8 0 scxspl 216 6377 0 6377 3 2 1 2 1 8 1 plimitpl 152 99 0 77 2 0 2 2 0 8 1 sigapl 424 537 0 486 7 0 7 7 0 8 0 futexpl 64 1472 0 1471 1 0 1 1 0 8 0 knotepl 120 61 0 0 2 0 2 2 0 8 0 kqueuepl 216 83 0 70 3 0 3 3 0 8 2 pipepl 328 136 0 109 3 0 3 3 0 8 0 fdescpl 504 518 0 486 7 1 6 6 0 8 0 filepl 152 2104 0 1893 10 0 10 10 0 8 1 lockfpl 104 57 0 55 1 0 1 1 0 8 0 lockfspl 48 18 0 16 1 0 1 1 0 8 0 sessionpl 144 31 0 16 1 0 1 1 0 8 0 pgrppl 48 49 0 27 1 0 1 1 0 8 0 ucredpl 104 240 0 222 1 0 1 1 0 8 0 zombiepl 144 488 0 486 1 0 1 1 0 8 0 processpl 1176 537 0 486 5 0 5 5 0 8 0 procpl 656 720 0 666 7 0 7 7 0 8 1 sockpl 688 301 0 266 4 0 4 4 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 109 0 0 14 0 14 14 0 8 0 mcl2k 2048 17 0 0 3 0 3 3 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 303 0 0 19 0 19 19 0 8 0 bufpl 280 2363 0 124 160 0 160 160 0 8 0 anonpl 24 101739 0 98747 23 2 21 23 0 184 0 amapchunkpl 152 11242 0 10801 24 0 24 24 0 158 4 amappl16 200 1899 0 1879 5 3 2 5 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 100 0 90 1 0 1 1 0 8 0 amappl13 176 7 0 7 2 2 0 1 0 8 0 amappl12 168 1113 0 1081 2 0 2 2 0 8 0 amappl11 160 46 0 36 1 0 1 1 0 8 0 amappl10 152 43 0 42 1 0 1 1 0 8 0 amappl9 144 251 0 251 1 1 0 1 0 8 0 amappl8 136 19 0 18 1 0 1 1 0 8 0 amappl7 128 114 0 104 1 0 1 1 0 8 0 amappl6 120 173 0 169 1 0 1 1 0 8 0 amappl5 112 113 0 106 1 0 1 1 0 8 0 amappl4 104 270 0 256 1 0 1 1 0 8 0 amappl3 96 1908 0 1804 4 0 4 4 0 8 0 amappl2 88 611 0 554 2 0 2 2 0 8 0 amappl1 80 7697 0 7167 13 0 13 13 0 8 0 amappl 88 3372 0 3217 5 0 5 5 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 5 0 0 1 0 1 1 0 8 0 uaddrrnd 24 518 0 486 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 518 0 486 1 0 1 1 0 8 0 vmmpekpl 168 5912 0 5862 3 0 3 3 0 8 0 vmmpepl 168 37593 0 35830 90 0 90 90 0 357 6 vmsppl 456 517 0 486 7 1 6 6 0 8 1 rwobjpl 64 14881 0 12217 45 1 44 44 0 8 0 pdppl 4096 1044 0 972 106 26 80 96 0 8 8 pvpl 32 10399 0 0 84 0 84 84 0 265 0 pmappl 248 517 0 486 4 1 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 284 0 29 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace witness_checkorder(deadbeefdeadc00f,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:775 mtx_enter(deadbeefdeadbfff) at mtx_enter+0x47 sys/kern/kern_lock.c:238 prsignal(deadbeefdeadbeef,14) at prsignal+0x36 sys/kern/kern_sig.c:909 reaper(ffff80002a2f9718) at reaper+0x32c sys/kern/kern_exit.c:492 end trace frame: 0x0, count: -4 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800029a9bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff839906d8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839906d8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 __mp_acquire_count(ffffffff839906d8,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x4b7 sys/kern/sched_bsd.c:441 sleep_finish(0,1) at sleep_finish+0x24f sys/kern/kern_synch.c:414 biowait(fffffd806b5dcc38) at biowait+0xc1 sys/kern/vfs_bio.c:1246 bwrite(fffffd806b5dcc38) at bwrite+0x2e5 sys/kern/vfs_bio.c:758 VOP_BWRITE(fffffd806b5dcc38) at VOP_BWRITE+0x60 sys/kern/vfs_vops.c:648 ufs_mkdir(ffff80003b0c8810) at ufs_mkdir+0x581 sys/ufs/ufs/ufs_vnops.c:1160 VOP_MKDIR(fffffd806c813620,ffff80003b0c8970,ffff80003b0c89a0,ffff80003b0c88a0) at VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 domkdirat(ffff8000ffff67d0,ffffff9c,7118b5d2a0c0,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3117 syscall(ffff80003b0c8b20) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003b0c8b20) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7118b5d2a160, count: -15