kernel: protection fault trap, code=0 Stopped at witness_checkorder+0xa9: movl 0x18(%r14),%r15d 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(dead4110dead4230,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:775 mtx_enter(dead4110dead4220) at mtx_enter+0x47 sys/kern/kern_lock.c:238 prsignal(dead4110dead4110,14) at prsignal+0x36 sys/kern/kern_sig.c:908 reaper(ffff8000ffffcf38) at reaper+0x32c sys/kern/kern_exit.c:489 end trace frame: 0x0, count: -4 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a312d70 rbx 0 rdx 0 rcx 0xffff8000ffffcf38 rax 0xffff800029aabff0 r8 0 r9 0x1 r10 0 r11 0x577a4f607922a452 r12 0 r13 0x1 r14 0xdead4110dead4230 r15 0x3 rip 0xffffffff82075ad9 witness_checkorder+0xa9 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a312cc0 ss 0x10 witness_checkorder+0xa9: movl 0x18(%r14),%r15d ddb{1}> show proc PROC (reaper) tid=156999 pid=87657 tcnt=1 stat=onproc flags process=14000 proc=200 runpri=32, usrpri=53, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffd1c0,0xffff8000ffffccc0 process=0xffff80002a316b58 user=0xffff80002a30d000, vmspace=0xffffffff839007f0 estcpu=3, cpticks=8, pctcpu=0.48, user=0, sys=84, intr=2 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 92934 113053 9952 0 2 0 syz-executor 92934 214204 9952 0 3 0x4000080 fsleep syz-executor 57981 91152 34503 0 2 0 syz-executor 57981 88230 34503 0 3 0x4000080 fsleep syz-executor 57981 460360 34503 0 3 0x4000080 fsleep syz-executor 38702 339027 17477 0 2 0 syz-executor 38702 148799 17477 0 2 0x4000000 syz-executor 12143 473384 8654 0 2 0 syz-executor 12143 374703 8654 0 3 0x4000080 fsleep syz-executor 7323 200981 26696 0 2 0 syz-executor 7323 328352 26696 0 3 0x4000080 fsleep syz-executor 7323 369418 26696 0 2 0x4000000 syz-executor 53972 97498 12108 0 2 0 syz-executor 53972 18145 12108 0 3 0x4000080 fsleep syz-executor 53972 4124 12108 0 2 0x4000000 syz-executor 9952 429402 8698 0 3 0x82 nanoslp syz-executor 26696 62757 8698 0 3 0x82 nanoslp syz-executor 4686 217895 8698 0 2 0x2 syz-executor 8654 252307 8698 0 3 0x82 nanoslp syz-executor 12108 476300 8698 0 3 0x82 nanoslp syz-executor 34503 334919 8698 0 3 0x82 nanoslp syz-executor 77748 435291 8698 0 3 0x2 biowait syz-executor 17477 436978 8698 0 3 0x82 nanoslp syz-executor 8698 131010 76774 0 7 0x2 syz-executor 76774 344630 49966 0 3 0x10008a sigsusp ksh 49966 503459 54325 0 3 0x98 kqread sshd-session 54325 172955 84806 0 3 0x92 kqread sshd-session 86118 519449 1 0 3 0x100083 ttyin getty 84806 338882 1 0 3 0x88 kqread sshd 67159 174514 56646 74 3 0x1100092 bpf pflogd 56646 292847 1 0 3 0x80 sbwait pflogd 14241 204287 79200 73 3 0x1100090 kqread syslogd 79200 454861 1 0 3 0x100082 sbwait syslogd 65935 353577 1 0 3 0x100080 kqread resolvd 29465 384230 89340 77 3 0x100092 kqread dhcpleased 60533 448284 89340 77 3 0x100092 kqread dhcpleased 89340 189660 1 0 3 0x80 kqread dhcpleased 40783 403360 0 0 3 0x14200 bored smr 48594 421644 0 0 2 0x14200 zerothread 88436 154131 0 0 3 0x14200 aiodoned aiodoned 41336 446528 0 0 3 0x14200 syncer update 76364 131968 0 0 3 0x14200 cleaner cleaner *87657 156999 0 0 7 0x14200 reaper 41188 506823 0 0 3 0x14200 pgdaemon pagedaemon 73524 379292 0 0 3 0x14200 bored viomb 85869 86703 0 0 3 0x40014200 acpi0 acpi0 67413 161928 0 0 3 0x40014200 idle1 94971 285110 0 0 3 0x14200 bored softnet3 13864 37398 0 0 3 0x14200 bored softnet2 30388 522505 0 0 3 0x14200 bored softnet1 55439 61046 0 0 3 0x14200 bored softnet0 76935 243377 0 0 3 0x14200 bored systqmp 81523 325103 0 0 3 0x14200 bored systq 65491 403167 0 0 3 0x14200 tmoslp softclockmp 58190 438455 0 0 3 0x40014200 tmoslp softclock 20379 523651 0 0 3 0x40014200 idle0 1 67794 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 4686 (syz-executor) thread 0xffff8000ffffca28 (217895) exclusive rwlock fdlock r = 0 (0xfffffd806ecdbe30) #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 doopenat+0x173 #3 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #4 Xsyscall+0x128 Process 77748 (syz-executor) thread 0xffff80002a36a7b0 (435291) exclusive rrwlock inode r = 0 (0xfffffd806be4e888) #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:3102 #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 (0xfffffd806d09e1e8) #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:3087 #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 87657 (reaper) thread 0xffff8000ffffcf38 (156999) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83950710) #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:486 #7 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10211 11279K 11279K 166960K 11404 0 pcb 17 12K 12K 166960K 30 0 rtable 236 6K 7K 166960K 361 0 pf 34 17K 18K 166960K 45 0 ifaddr 43 7K 7K 166960K 46 0 ifgroup 55 2K 2K 166960K 55 0 sysctl 1 1K 1K 166960K 1 0 counters 64 36K 36K 166960K 64 0 ioctlops 0 0K 4K 166960K 1518 0 iov 0 0K 12K 166960K 7 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1336 84K 84K 166960K 1395 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 8 0K 0K 166960K 9 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 16 57K 89K 166960K 199 0 proc 71 91K 128K 166960K 539 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 10 0 in_multi 99 7K 7K 166960K 101 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 432 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 211 72K 73K 166960K 3371 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 41 82K 105K 166960K 1277 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 2 0 NDP 12 0K 2K 166960K 28 0 temp 38 8631K 8698K 166960K 4440 0 kqueue 15 22K 26K 166960K 32 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 36 0 33 1 0 1 1 0 8 0 rtentry 112 116 0 5 4 0 4 4 0 8 0 unpcb 144 57 0 38 1 0 1 1 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 91 0 84 8 0 8 8 0 8 7 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 376 192 0 180 9 0 9 9 0 8 7 nd6 136 27 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 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 22 0 0 1 0 1 1 0 8 0 pfstkey 128 22 0 0 1 0 1 1 0 8 0 pfstate 376 22 0 0 3 0 3 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 256 498 0 12 31 0 31 31 0 8 0 art_table 32 499 0 12 4 0 4 4 0 8 0 art_node 16 115 0 14 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 0 1 1 0 8 1 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 7 0 1 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1669 0 163 95 0 95 95 0 8 0 ffsino 280 1669 0 163 108 0 108 108 0 8 0 nchpl 144 1944 0 260 63 0 63 63 0 8 0 uvmvnodes 80 1780 0 0 37 0 37 37 0 8 0 vnodes 216 1780 0 0 99 0 99 99 0 8 0 namei 1024 6082 0 6080 2 1 1 1 0 8 0 percpumem 16 46 0 0 1 0 1 1 0 8 0 kstatmem 264 24 0 0 2 0 2 2 0 8 0 scsiplug 72 2 0 2 2 1 1 1 0 8 1 scxspl 216 6375 0 6374 4 3 1 2 1 8 0 plimitpl 152 42 0 25 1 0 1 1 0 8 0 sigapl 424 497 0 449 7 0 7 7 0 8 1 futexpl 64 1001 0 995 1 0 1 1 0 8 0 knotepl 120 301 0 0 10 0 10 10 0 8 0 kqueuepl 216 36 0 24 1 0 1 1 0 8 0 pipepl 328 113 0 85 3 0 3 3 0 8 0 fdescpl 504 479 0 449 5 0 5 5 0 8 1 filepl 152 1864 0 1641 13 1 12 12 0 8 3 lockfpl 104 29 0 27 1 0 1 1 0 8 0 lockfspl 48 15 0 13 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 30 0 13 1 0 1 1 0 8 0 ucredpl 104 132 0 119 1 0 1 1 0 8 0 zombiepl 144 457 0 457 1 0 1 1 0 8 1 processpl 1168 497 0 449 5 1 4 5 0 8 0 procpl 648 617 0 560 6 0 6 6 0 8 0 sockpl 688 285 0 251 11 1 10 10 0 8 6 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 126 0 0 16 0 16 16 0 8 0 mcl2k 2048 30 0 0 4 0 4 4 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 150 0 0 10 0 10 10 0 8 0 bufpl 280 4583 0 128 319 0 319 319 0 8 0 anonpl 24 103074 0 99825 47 18 29 45 0 184 4 amapchunkpl 152 10148 0 9700 23 1 22 22 0 158 2 amappl16 200 2023 0 1997 18 14 4 15 0 8 1 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 112 0 99 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 1125 0 1095 3 1 2 2 0 8 0 amappl11 160 54 0 39 1 0 1 1 0 8 0 amappl10 152 46 0 46 1 1 0 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 28 0 24 1 0 1 1 0 8 0 amappl7 128 124 0 112 1 0 1 1 0 8 0 amappl6 120 173 0 169 1 0 1 1 0 8 0 amappl5 112 118 0 109 1 0 1 1 0 8 0 amappl4 104 308 0 290 1 0 1 1 0 8 0 amappl3 96 1726 0 1622 4 0 4 4 0 8 0 amappl2 88 628 0 568 2 0 2 2 0 8 0 amappl1 80 7889 0 7320 14 0 14 14 0 8 1 amappl 88 3004 0 2848 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 479 0 449 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 479 0 449 1 0 1 1 0 8 0 vmmpekpl 168 5682 0 5641 2 0 2 2 0 8 0 vmmpepl 168 35908 0 34115 94 7 87 93 0 357 3 vmsppl 456 478 0 449 5 0 5 5 0 8 1 rwobjpl 64 15006 0 12315 48 1 47 47 0 8 1 pdppl 4096 966 0 898 100 28 72 84 0 8 4 pvpl 32 13357 0 0 108 0 108 108 0 265 0 pmappl 248 478 0 449 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 285 0 33 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff83820ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff83950508) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83950508) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002a3b7bb0,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff83950508) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83950508) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 timeout_barrier(ffff80002a36a0c0) at timeout_barrier+0x297 timeout_del_barrier(ffff80002a36a0c0) at timeout_del_barrier+0x133 sys/kern/kern_timeout.c:462 sleep_finish(65,1) at sleep_finish+0x317 sys/kern/kern_synch.c:432 msleep(fffffd80725dc288,fffffd80725dc288,318,ffffffff833d7617,65) at msleep+0x13b sys/kern/kern_synch.c:249 kqueue_sleep(fffffd80725dc288,ffff80002a3b8428) at kqueue_sleep+0x12b sys/kern/kern_event.c:1454 kqueue_scan(ffff80002a3b81f0,8,ffff80002a3b80f0,ffff80002a3b8428,ffff80002a36a018,ffff80002a3b839c) at kqueue_scan+0x21e sys/kern/kern_event.c:1509 dopselect(ffff80002a36a018,32,7ef6fd15e7c0,0,0,ffff80002a3b8428,15f10109d0115c8f,ffff80002a36a018) at dopselect+0x5eb sys/kern/sys_generic.c:691 sys_pselect(ffff80002a36a018,ffff80002a3b8570,ffff80002a3b84c0) at sys_pselect+0x263 sys/kern/sys_generic.c:589 syscall(ffff80002a3b8570) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3b8570) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ef6fd15e770, count: -20 ddb{0}> machine ddbcpu 1 Stopped at witness_checkorder+0xa9: movl 0x18(%r14),%r15d ddb{1}> trace witness_checkorder(dead4110dead4230,9,0) at witness_checkorder+0xa9 sys/kern/subr_witness.c:775 mtx_enter(dead4110dead4220) at mtx_enter+0x47 sys/kern/kern_lock.c:238 prsignal(dead4110dead4110,14) at prsignal+0x36 sys/kern/kern_sig.c:908 reaper(ffff8000ffffcf38) at reaper+0x32c sys/kern/kern_exit.c:489 end trace frame: 0x0, count: -4