uvm_fault(0xfffffd806a0f9760, 0x7, 0, 1) -> e kernel: page fault trap, code=0 Stopped at witness_checkorder+0x1ec: movl 0x8(%r14),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND 456478 57375 0 0x12 0 0 sshd witness_checkorder(fffffd807e869880,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd807e869870) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff8000212872a0,fffffd807e869870,fffffd807e8698f8,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff8000212872a0,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff8000212872a0) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff8000212872a0,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff8000212872a0,ffff800021299240,ffff800021299290) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800021299310) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800021299310) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71e4fa7334f0, count: 6 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd806a0f9760, 0x7, 0, 1) -> e ddb{1}> trace witness_checkorder(fffffd807e869880,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd807e869870) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff8000212872a0,fffffd807e869870,fffffd807e8698f8,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff8000212872a0,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff8000212872a0) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff8000212872a0,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff8000212872a0,ffff800021299240,ffff800021299290) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800021299310) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800021299310) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71e4fa7334f0, count: -9 ddb{1}> show registers rdi 0 rsi 0x20000 acpi_pdirpa+0xbe63 rbp 0xffff800021298fe0 rbx 0xe rdx 0 rcx 0xffff8000212872a0 rax 0xffff800020d58ff0 r8 0x1 r9 0x1 r10 0x4bcf52411937925a r11 0x4d6cd38dbcfc0341 r12 0 r13 0xfffffd807e869880 r14 0xffffffffffffffff r15 0xffff8000212872a0 rip 0xffffffff826c515c witness_checkorder+0x1ec cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800021298f30 ss 0x10 witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{1}> show proc PROC (syz-executor.7) pid=213985 stat=onproc flags process=1018 proc=2000 pri=0, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff800021286aa8,0xffff800021287aa8 process=0xffff8000ffff7258 user=0xffff800021294000, vmspace=0xfffffd806a0f9760 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 3096 443465 48143 32767 2 0x10 syz-executor.4 86339 262328 47806 32767 2 0x10 syz-executor.6 56369 178963 63912 32767 2 0x10 syz-executor.1 56369 262416 63912 32767 3 0x4000090 fsleep syz-executor.1 56369 492025 63912 32767 2 0x4000010 syz-executor.1 18909 270211 40825 32767 2 0x10 syz-executor.5 18909 58095 40825 32767 3 0x4000090 kqpoll syz-executor.5 18909 11991 40825 32767 2 0x4000010 syz-executor.5 40825 271904 42750 32767 3 0x90 nanoslp syz-executor.5 42750 90305 73045 0 3 0x82 wait syz-executor.5 11332 104249 1044 32767 3 0x90 nanoslp syz-executor.7 1044 172321 73045 0 3 0x82 wait syz-executor.7 33942 510218 77815 32767 2 0x10 syz-executor.2 77815 481849 73045 0 3 0x82 wait syz-executor.2 9954 510552 0 0 3 0x14200 bored sosplice 63912 270468 27932 32767 3 0x90 nanoslp syz-executor.1 47806 192996 22226 32767 3 0x90 nanoslp syz-executor.6 78486 222058 28463 32767 2 0x10 syz-executor.3 27932 252269 73045 0 3 0x82 wait syz-executor.1 28463 178809 73045 0 3 0x82 wait syz-executor.3 48143 311450 41501 32767 2 0x10 syz-executor.4 22226 469605 73045 0 3 0x82 wait syz-executor.6 41501 116747 73045 0 3 0x82 wait syz-executor.4 85144 122000 74218 32767 3 0x10 biowait syz-executor.0 74218 227248 73045 0 3 0x82 wait syz-executor.0 73045 269164 97637 0 3 0x2000082 thrsleep syz-fuzzer 73045 260725 97637 0 3 0x6000082 nanoslp syz-fuzzer 73045 406430 97637 0 3 0x6000082 wait syz-fuzzer 73045 282389 97637 0 3 0x6000082 wait syz-fuzzer 73045 105224 97637 0 3 0x6000082 wait syz-fuzzer 73045 345393 97637 0 2 0x6000002 syz-fuzzer 73045 374687 97637 0 3 0x6000082 thrsleep syz-fuzzer 73045 517292 97637 0 3 0x6000082 wait syz-fuzzer 73045 189727 97637 0 3 0x6000082 thrsleep syz-fuzzer 73045 40692 97637 0 3 0x6000082 wait syz-fuzzer 73045 105041 97637 0 3 0x6000082 thrsleep syz-fuzzer 73045 321222 97637 0 3 0x6000082 thrsleep syz-fuzzer 73045 446533 97637 0 3 0x6000082 wait syz-fuzzer 73045 494067 97637 0 3 0x6000082 wait syz-fuzzer 73045 35893 97637 0 2 0x6000002 syz-fuzzer 73045 324581 97637 0 3 0x6000082 wait syz-fuzzer 97637 363087 57375 0 3 0x10008a sigsusp ksh 57375 456478 43961 0 7 0x12 sshd 26954 32053 1 0 3 0x100083 ttyin getty 43961 210310 1 0 3 0x88 kqread sshd 34877 236746 50116 73 3 0x1100090 kqread syslogd 50116 119665 1 0 3 0x100082 netio syslogd 53019 522801 1 0 3 0x100080 kqread resolvd 27412 263359 82641 77 3 0x100092 kqread dhcpleased 51535 1543 82641 77 3 0x100092 kqread dhcpleased 82641 393883 1 0 3 0x80 kqread dhcpleased 70255 424134 0 0 3 0x14200 bored smr 20709 218013 0 0 2 0x14200 zerothread 65197 250702 0 0 3 0x14200 aiodoned aiodoned 65362 295050 0 0 3 0x14200 syncer update 67035 5717 0 0 3 0x14200 cleaner cleaner 95002 470227 0 0 2 0x14200 reaper 4387 214227 0 0 3 0x14200 pgdaemon pagedaemon 52744 337039 0 0 3 0x14200 bored viomb 17162 31591 0 0 3 0x40014200 acpi0 acpi0 45707 46855 0 0 3 0x40014200 idle1 53120 134814 0 0 3 0x14200 bored softnet3 63262 53895 0 0 3 0x14200 bored softnet2 91378 392497 0 0 3 0x14200 bored softnet1 16214 300805 0 0 3 0x14200 bored softnet0 14778 468561 0 0 3 0x14200 bored systqmp 4174 512021 0 0 3 0x14200 bored systq 18549 199092 0 0 3 0x40014200 bored softclock 64260 279727 0 0 3 0x40014200 idle0 1 443789 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 85144 (syz-executor.0) thread 0xffff80002120c810 (122000) exclusive rrwlock inode r = 0 (0xfffffd80691bc0a8) #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 (0xfffffd8069d504d8) #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 57375 (sshd) thread 0xffff8000211eeab0 (456478) shared rwlock vmmaplk r = 0 (0xfffffd806f178670) #0 witness_lock+0x447 #1 uvm_map_inentry_fix+0xa5 vm_map_lock_read_ln sys/uvm/uvm_map.c:5368 [inline] #1 uvm_map_inentry_fix+0xa5 sys/uvm/uvm_map.c:1657 #2 uvm_map_inentry+0xce sys/uvm/uvm_map.c:1688 #3 syscall+0x442 mi_syscall sys/sys/syscall_mi.h:96 [inline] #3 syscall+0x442 sys/arch/amd64/amd64/trap.c:623 #4 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10224 6414K 6420K 78643K 11340 0 pcb 13 16K 18K 78643K 19 0 rtable 248 7K 7K 78643K 961 0 pf 29 8K 8K 78643K 53 0 ifaddr 44 15K 15K 78643K 96 0 ifgroup 50 2K 2K 78643K 98 0 sysctl 3 1K 1K 78643K 3 0 counters 60 35K 35K 78643K 84 0 ioctlops 0 0K 2K 78643K 313 0 iov 0 0K 18K 78643K 1098 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 2504 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 122 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1057 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 23 85K 117K 78643K 9676 0 sigio 0 0K 0K 78643K 129 0 proc 56 78K 115K 78643K 1378 0 subproc 104 6K 6K 78643K 260 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1203 0 in_multi 99 7K 7K 78643K 338 0 ether_multi 1 0K 0K 78643K 18 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 283 1261K 1261K 78643K 283 0 exec 0 0K 1K 78643K 1378 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 431 100K 110K 78643K 96708 0 UVM aobj 131 4K 5K 78643K 154 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 241 0 NDP 11 0K 2K 78643K 63 0 temp 74 5920K 6000K 78643K 26561 0 kqueue 13 20K 28K 78643K 825 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 120 520 0 517 7 6 1 4 0 8 0 rtentry 112 255 0 138 4 0 4 4 0 8 0 unpcb 144 5496 0 5483 54 51 3 10 0 8 2 syncache 304 134 0 134 17 16 1 1 0 8 1 tcpqe 32 402 0 402 16 15 1 1 0 8 1 tcpcb 808 11329 0 11285 161 153 8 21 0 8 2 arp 120 44 0 26 1 0 1 1 0 8 0 ipq 40 12 0 12 4 4 0 1 0 8 0 ipqe 40 39 0 39 4 4 0 1 0 8 0 inpcb 368 15350 0 15301 146 135 11 20 0 8 6 nd6 136 70 0 39 2 0 2 2 0 8 0 kcovpl 48 20 0 12 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1014 0 545 32 2 30 30 0 8 0 art_table 32 1015 0 545 4 0 4 4 0 8 0 art_node 16 254 0 147 1 0 1 1 0 8 0 semapl 112 1055 0 1045 1 0 1 1 0 8 0 shmpl 112 151 0 23 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 13479 0 12022 92 0 92 92 0 8 0 ffsino 272 13479 0 12022 98 0 98 98 0 8 0 nchpl 144 26087 0 24445 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 83604 0 83604 6 5 1 2 0 8 1 percpumem 16 55 0 12 1 0 1 1 0 8 0 kstatmem 264 46 0 24 2 0 2 2 0 8 0 scxspl 216 86251 0 86250 43 42 1 8 1 8 0 plimitpl 152 1196 0 1173 12 10 2 2 0 8 1 sigapl 424 9948 0 9896 7 0 7 7 0 8 0 futexpl 64 80668 0 80667 3 2 1 1 0 8 0 knotepl 120 849 0 0 17 1 16 17 0 8 0 kqueuepl 216 1818 0 1808 29 26 3 5 0 8 2 pipepl 320 2139 0 2111 50 44 6 8 0 8 3 fdescpl 496 9930 0 9896 7 2 5 6 0 8 0 filepl 152 61567 0 61330 126 112 14 19 0 8 4 lockfpl 104 1542 0 1540 1 0 1 1 0 8 0 lockfspl 48 595 0 593 1 0 1 1 0 8 0 sessionpl 144 35 0 19 1 0 1 1 0 8 0 pgrppl 48 118 0 102 1 0 1 1 0 8 0 ucredpl 104 7176 0 7158 1 0 1 1 0 8 0 zombiepl 144 9897 0 9896 1 0 1 1 0 8 0 processpl 1072 9948 0 9896 4 0 4 4 0 8 0 procpl 680 27011 0 26939 25 17 8 8 0 8 1 sosppl 168 122 0 122 12 11 1 1 0 8 1 sockpl 488 21701 0 21636 358 341 17 36 0 8 7 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 25 0 0 4 1 3 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 11 0 0 1 0 1 1 0 8 0 mcl8k 8192 18 0 0 3 0 3 3 0 8 0 mcl4k 4096 46 0 0 3 0 3 3 0 8 0 mcl2k2 2112 14 0 0 1 0 1 1 0 8 0 mcl2k 2048 413 0 0 38 16 22 38 0 8 0 mtagpl 96 22 0 0 1 0 1 1 0 8 0 mbufpl 256 1403 0 0 59 0 59 59 0 8 0 bufpl 288 21952 0 15627 453 0 453 453 0 8 0 anonpl 24 1107629 0 1096157 257 161 96 119 0 186 3 amapchunkpl 152 306508 0 305666 108 67 41 49 0 158 2 amappl16 200 27176 0 26894 184 160 24 41 0 8 8 amappl15 192 15 0 15 1 1 0 1 0 8 0 amappl14 184 190 0 174 2 1 1 2 0 8 0 amappl13 176 12 0 12 1 1 0 1 0 8 0 amappl12 168 10748 0 10712 3 0 3 3 0 8 0 amappl11 160 63 0 51 1 0 1 1 0 8 0 amappl10 152 44 0 30 1 0 1 1 0 8 0 amappl9 144 242 0 241 1 0 1 1 0 8 0 amappl8 136 561 0 412 6 0 6 6 0 8 0 amappl7 128 98 0 85 2 0 2 2 0 8 0 amappl6 120 410 0 386 2 1 1 2 0 8 0 amappl5 112 377 0 369 1 0 1 1 0 8 0 amappl4 104 776 0 734 3 1 2 3 0 8 0 amappl3 96 60531 0 60451 5 2 3 4 0 8 0 amappl2 88 10628 0 10552 3 1 2 3 0 8 0 amappl1 80 43364 0 42840 22 10 12 22 0 8 0 amappl 88 95764 0 95517 7 0 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 72 153 0 23 3 0 3 3 0 8 0 uaddrrnd 24 9930 0 9896 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 9930 0 9896 1 0 1 1 0 8 0 vmmpekpl 168 81785 0 81725 4 0 4 4 0 8 0 vmmpepl 168 589594 0 587195 253 129 124 133 0 357 10 vmsppl 464 9929 0 9896 7 2 5 6 0 8 0 rwobjpl 56 157543 0 150121 126 16 110 112 0 8 2 pdppl 4096 19867 0 19792 381 300 81 91 0 8 6 pvpl 32 2955276 0 2937773 578 392 186 360 0 265 16 pmappl 248 9929 0 9896 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1511 0 631 26 0 26 26 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82c39ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc intr_handler(ffff800021224c90,ffff80000027b500) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 kd_curproc sys/dev/kcov.c:590 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 sys/dev/kcov.c:158 __mp_lock(ffffffff82c85668) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c85668) at __mp_lock+0x133 sys/kern/kern_lock.c:147 intr_handler(ffff800021224df0,ffff80000007b080) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff82c85668) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c85668) at __mp_lock+0x122 sys/kern/kern_lock.c:147 doppoll(ffff8000211eeab0,fdfd8d6e000,4,0,ffff8000212251e4,ffff8000212252b0) at doppoll+0x159 sys/kern/sys_generic.c:950 sys_ppoll(ffff8000211eeab0,ffff800021225260,ffff8000212252b0) at sys_ppoll+0x137 sys/kern/sys_generic.c:916 syscall(ffff800021225330) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800021225330) at syscall+0x606 sys/arch/amd64/amd64/trap.c:623 end trace frame: 0xffff8000212253b0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82c39ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc intr_handler(ffff800021224c90,ffff80000027b500) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge25_untramp() at Xintr_ioapic_edge25_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 kd_curproc sys/dev/kcov.c:590 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 sys/dev/kcov.c:158 __mp_lock(ffffffff82c85668) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c85668) at __mp_lock+0x133 sys/kern/kern_lock.c:147 intr_handler(ffff800021224df0,ffff80000007b080) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff82c85668) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c85668) at __mp_lock+0x122 sys/kern/kern_lock.c:147 doppoll(ffff8000211eeab0,fdfd8d6e000,4,0,ffff8000212251e4,ffff8000212252b0) at doppoll+0x159 sys/kern/sys_generic.c:950 sys_ppoll(ffff8000211eeab0,ffff800021225260,ffff8000212252b0) at sys_ppoll+0x137 sys/kern/sys_generic.c:916 syscall(ffff800021225330) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800021225330) at syscall+0x606 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x713d71fea310, count: -15 ddb{0}> machine ddbcpu 1 Stopped at witness_checkorder+0x1ec: movl 0x8(%r14),%ebx witness_checkorder(fffffd807e869880,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd807e869870) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff8000212872a0,fffffd807e869870,fffffd807e8698f8,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff8000212872a0,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff8000212872a0) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff8000212872a0,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff8000212872a0,ffff800021299240,ffff800021299290) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800021299310) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800021299310) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71e4fa7334f0, count: 6 ddb{1}> trace witness_checkorder(fffffd807e869880,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd807e869870) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff8000212872a0,fffffd807e869870,fffffd807e8698f8,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff8000212872a0,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff8000212872a0) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff8000212872a0,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff8000212872a0,ffff800021299240,ffff800021299290) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800021299310) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800021299310) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71e4fa7334f0, count: -9