kernel: protection fault trap, code=0 Stopped at witness_checkorder+0xb5: movl 0x20(%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(deafbeaddeafbfc5,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(deafbeaddeafbfb5) at mtx_enter+0x95 sys/kern/kern_lock.c:406 prsignal(deafbeaddeafbead,14) at prsignal+0x36 sys/kern/kern_sig.c:904 reaper(ffff8000ffffd9f8) at reaper+0x2ec sys/kern/kern_exit.c:516 end trace frame: 0x0, count: -4 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a233fc0 rbx 0 rdx 0 rcx 0xffff8000ffffd9f8 rax 0xffffffff837c0ffe cpu_info_full_primary+0x1ffe r8 0x3b9acdff r9 0 r10 0x46174c1fd48f4433 r11 0x38c8e95260e30ff3 r12 0xdeafbeaddeafbffe r13 0x9 r14 0xdeafbeaddeafbfc5 r15 0 rip 0xffffffff82b0c575 witness_checkorder+0xb5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a233f20 ss 0x10 witness_checkorder+0xb5: movl 0x20(%r14),%r15d ddb{0}> show proc PROC (reaper) tid=115795 pid=27869 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=0xffff8000fffffc88,0xffff8000ffffc2b0 process=0xffff8000ffffb9c0 user=0xffff80002a22f000, vmspace=0xffffffff839dcd20 estcpu=0, cpticks=17, pctcpu=0.1, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 14146 42985 60729 32767 2 0x10 syz-executor 14146 465172 60729 32767 3 0x4000090 kqread syz-executor 14146 341899 60729 32767 3 0x4000090 kqread syz-executor 44619 336649 19553 32767 2 0xc90 syz-executor 44619 509692 19553 32767 3 0x4000090 ttyin syz-executor 44619 466177 19553 32767 3 0x4000090 fsleep syz-executor 16220 49412 56345 32767 3 0x90 nanoslp syz-executor 16220 366395 56345 32767 3 0x4000090 fsleep syz-executor 16220 69484 56345 32767 3 0x4000090 fsleep syz-executor 16220 34159 56345 32767 3 0x4000090 pipewr syz-executor 47061 359827 56473 32767 3 0x90 nanoslp syz-executor 47061 81810 56473 32767 3 0x4000090 ttyout syz-executor 47061 234207 56473 32767 3 0x4000090 fsleep syz-executor 22413 362316 60465 32767 2 0x10 syz-executor 40864 243574 44133 32767 3 0x90 wait syz-executor 19553 154354 30122 32767 2 0xc90 syz-executor 60729 126562 73879 32767 3 0x90 nanoslp syz-executor 56345 384495 13690 32767 2 0xc90 syz-executor 56473 518496 20350 32767 2 0xc90 syz-executor 7996 315469 28044 32767 7 0x10 syz-executor 44133 494769 19360 0 3 0x82 wait syz-executor 60465 229427 19360 0 3 0x82 wait syz-executor 30122 171879 19360 0 3 0x82 wait syz-executor 73879 158091 19360 0 3 0x82 wait syz-executor 20350 61993 19360 0 3 0x82 wait syz-executor 28044 306183 19360 0 3 0x82 wait syz-executor 13690 254002 19360 0 3 0x82 wait syz-executor 19360 426672 96335 0 2 0x2 syz-executor 96335 374377 34132 0 3 0x10008a sigsusp ksh 34132 237062 75188 0 3 0x98 kqread sshd-session 75188 520254 35130 0 3 0x92 kqread sshd-session 60217 412784 1 0 3 0x100083 ttyin getty 35130 316889 1 0 3 0x88 kqread sshd 16977 237351 71985 73 3 0x1100090 kqread syslogd 71985 6867 1 0 3 0x100082 sbwait syslogd 28010 422877 1 0 3 0x100080 kqread resolvd 5246 519208 78186 77 3 0x100092 kqread dhcpleased 32759 115833 78186 77 3 0x100092 kqread dhcpleased 78186 482595 1 0 3 0x80 kqread dhcpleased 9149 32156 0 0 3 0x14200 bored smr 5806 443924 0 0 2 0x14200 zerothread 8765 328985 0 0 3 0x14200 aiodoned aiodoned 19740 472883 0 0 3 0x14200 syncer update 7805 277283 0 0 3 0x14200 cleaner cleaner *27869 115795 0 0 7 0x14200 reaper 43178 310388 0 0 3 0x14200 pgdaemon pagedaemon 76266 181190 0 0 3 0x14200 bored viomb 9245 466512 0 0 3 0x40014200 acpi0 acpi0 80266 165692 0 0 3 0x40014200 idle1 76700 458501 0 0 3 0x14200 bored softnet1 7086 277989 0 0 3 0x14200 bored softnet0 52438 439738 0 0 3 0x14200 bored systqmp 16924 406758 0 0 3 0x14200 bored systq 73610 164823 0 0 3 0x14200 tmoslp softclockmp 47361 231918 0 0 3 0x40014200 tmoslp softclock 87177 342296 0 0 3 0x40014200 idle0 1 512277 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 22413 (syz-executor) thread 0xffff80002a280d10 (362316) exclusive rrwlock inode r = 0 (0xfffffd806f12b800) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d035698) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 27869 (reaper) thread 0xffff8000ffffd9f8 (115795) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839acac0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 sleep_finish+0x2d8 sys/kern/kern_synch.c:369 #3 rw_do_enter_write+0x1dc sys/kern/kern_rwlock.c:298 #4 knote_processexit+0x2b sys/kern/kern_event.c:2217 #5 reaper+0x26d sys/kern/kern_exit.c:513 #6 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11073 12019K 12034K 166960K 12168 0 pcb 17 12K 12K 166960K 17 0 rtable 223 6K 7K 166960K 379 0 pf 29 16K 16K 166960K 31 0 ifaddr 38 6K 7K 166960K 44 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 4 1K 9K 166960K 9 0 counters 68 36K 37K 166960K 70 0 ioctlops 0 0K 2K 166960K 35 0 iov 0 0K 16K 166960K 24 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1336 84K 84K 166960K 1407 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 22 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 21 77K 125K 166960K 538 0 sigio 0 0K 0K 166960K 69 0 proc 58 99K 180K 166960K 534 0 subproc 63 3K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 150 0 in_multi 88 6K 7K 166960K 111 0 ether_multi 1 0K 0K 166960K 3 0 mrt 2 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 217 970K 970K 166960K 217 0 exec 0 0K 1K 166960K 438 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 237 151K 182K 166960K 6614 0 UVM aobj 16 5K 5K 166960K 17 0 pinsyscall 42 84K 114K 166960K 1644 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 51 0 NDP 10 0K 2K 166960K 27 0 temp 45 8681K 8754K 166960K 6416 0 kqueue 16 24K 34K 166960K 98 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 139 0 136 1 0 1 1 0 8 0 rtentry 176 117 0 14 6 0 6 6 0 8 0 unpcb 144 410 0 394 4 0 4 4 0 8 3 syncache 336 11 0 11 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 347 0 342 7 0 7 7 0 8 6 arp 136 19 0 2 1 0 1 1 0 8 0 ipq 40 5 0 1 1 0 1 1 0 8 0 ipqe 40 13 0 5 1 0 1 1 0 8 0 inpcb 328 682 0 672 7 0 7 7 0 8 5 nd6 152 29 0 5 2 0 2 2 0 8 0 kcovpl 48 11 0 4 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 498 0 72 31 0 31 31 0 8 2 art_table 40 499 0 72 5 0 5 5 0 8 0 art_node 32 117 0 23 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 3 1 0 1 1 0 8 0 semupl 112 3 0 3 1 0 1 1 0 8 1 semapl 112 20 0 10 1 0 1 1 0 8 0 shmpl 112 14 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2117 0 598 96 0 96 96 0 8 0 ffsino 296 2117 0 598 117 0 117 117 0 8 0 nchpl 144 2865 0 1173 64 0 64 64 0 8 1 vnodes 216 2225 0 0 124 0 124 124 0 8 0 namei 1024 9232 0 9231 1 0 1 1 0 8 0 percpumem 16 50 0 1 1 0 1 1 0 8 0 kstatmem 264 24 0 2 2 0 2 2 0 8 0 scxspl 216 9782 0 9782 9 1 8 8 1 8 8 plimitpl 152 147 0 124 2 0 2 2 0 8 0 sigapl 424 829 0 780 7 0 7 7 0 8 0 knotepl 120 389 0 0 12 0 12 12 0 8 0 kqueuepl 224 132 0 121 2 0 2 2 0 8 1 pipepl 344 167 0 139 3 0 3 3 0 8 0 fdescpl 528 813 0 780 4 0 4 4 0 8 0 filepl 160 4445 0 4237 15 0 15 15 0 8 5 lockfpl 104 109 0 107 1 0 1 1 0 8 0 lockfspl 48 45 0 43 1 0 1 1 0 8 0 sessionpl 144 31 0 16 1 0 1 1 0 8 0 pgrppl 48 51 0 29 1 0 1 1 0 8 0 ucredpl 104 786 0 768 1 0 1 1 0 8 0 zombiepl 144 781 0 780 1 0 1 1 0 8 0 processpl 1232 829 0 780 5 0 5 5 0 8 0 procpl 664 1473 0 1415 7 0 7 7 0 8 0 sosppl 176 5 0 5 1 0 1 1 0 8 1 sockpl 752 1240 0 1211 15 3 12 15 0 8 7 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 131 0 0 17 0 17 17 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 1213 0 0 76 0 76 76 0 8 0 bufpl 280 3193 0 118 220 0 220 220 0 8 0 anonpl 32 5837 0 0 48 0 48 48 0 246 0 amapchunkpl 152 20909 0 20400 36 0 36 36 0 158 10 amappl16 200 1342 0 1319 4 0 4 4 0 8 2 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 1 0 1 1 0 1 1 0 8 1 amappl13 176 408 0 407 1 0 1 1 0 8 0 amappl12 168 1200 0 1158 3 0 3 3 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 40 0 30 1 0 1 1 0 8 0 amappl9 144 259 0 257 1 0 1 1 0 8 0 amappl8 136 19 0 17 1 0 1 1 0 8 0 amappl7 128 76 0 75 1 0 1 1 0 8 0 amappl6 120 263 0 252 1 0 1 1 0 8 0 amappl5 112 85 0 77 1 0 1 1 0 8 0 amappl4 104 448 0 424 1 0 1 1 0 8 0 amappl3 96 3504 0 3413 3 0 3 3 0 8 0 amappl2 88 978 0 904 2 0 2 2 0 8 0 amappl1 80 12333 0 11785 14 0 14 14 0 8 0 amappl 88 5781 0 5613 5 0 5 5 0 92 0 uvmvnodes 80 118 0 0 3 0 3 3 0 8 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 16 0 1 1 0 1 1 0 8 0 uaddrrnd 24 813 0 780 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 813 0 780 1 0 1 1 0 8 0 vmmpekpl 168 8748 0 8696 3 0 3 3 0 8 0 vmmpepl 168 59224 0 57326 100 0 100 100 0 357 4 vmsppl 488 812 0 780 6 0 6 6 0 8 0 rwobjpl 80 18250 0 17299 24 1 23 23 0 8 0 pdppl 4096 1634 0 1560 120 34 86 98 0 8 12 pvpl 32 14568 0 0 118 0 118 118 0 265 0 pmappl 256 812 0 780 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 365 0 36 10 0 10 10 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace witness_checkorder(deafbeaddeafbfc5,9,0) at witness_checkorder+0xb5 sys/kern/subr_witness.c:779 mtx_enter(deafbeaddeafbfb5) at mtx_enter+0x95 sys/kern/kern_lock.c:406 prsignal(deafbeaddeafbead,14) at prsignal+0x36 sys/kern/kern_sig.c:904 reaper(ffff8000ffffd9f8) at reaper+0x2ec sys/kern/kern_exit.c:516 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(ffff8000299ddff0) 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(ffffffff839ac2c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839ac2c0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 syscall(ffff80002efb8320) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002efb8320) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74e8daeae890, count: -6