uvm_fault(0xfffffd806fe4e3b8, 0x8, 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 481270 90931 32767 0x10 0 0 syz-executor.2 witness_checkorder(fffffd807e82b010,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd807e82b000) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002126aff0,fffffd807e82b000,fffffd807e82b088,4,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002126aff0,4) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002126aff0) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002126aff0,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002126aff0,ffff800029569910,ffff800029569960) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000295699e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000295699e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75c457f5cbc0, 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(0xfffffd806fe4e3b8, 0x8, 0, 1) -> e ddb{1}> trace witness_checkorder(fffffd807e82b010,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd807e82b000) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002126aff0,fffffd807e82b000,fffffd807e82b088,4,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002126aff0,4) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002126aff0) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002126aff0,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002126aff0,ffff800029569910,ffff800029569960) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000295699e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000295699e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75c457f5cbc0, count: -9 ddb{1}> show registers rdi 0 rsi 0x20000 acpi_pdirpa+0xbe63 rbp 0xffff8000295696b0 rbx 0xe rdx 0 rcx 0xffff80002126aff0 rax 0xffff800020d58ff0 r8 0x1 r9 0x1 r10 0x9e739b62283b3d0 r11 0x567a7f3dfa8fb11e r12 0 r13 0xfffffd807e82b010 r14 0 r15 0xffff80002126aff0 rip 0xffffffff81a26f5c witness_checkorder+0x1ec cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800029569600 ss 0x10 witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{1}> show proc PROC (syz-executor.0) pid=20223 stat=onproc flags process=1018 proc=2000 pri=0, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021263560,0xffff80002120c578 process=0xffff8000ffff50d8 user=0xffff800029564000, vmspace=0xfffffd806fe4e3b8 estcpu=36, cpticks=3, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 90931 481270 32612 32767 7 0x10 syz-executor.2 64418 458469 59095 32767 2 0x10 syz-executor.1 64418 49163 59095 32767 3 0x4000090 fsleep syz-executor.1 52788 184052 99403 32767 2 0x10 syz-executor.6 52788 497524 99403 32767 3 0x4000090 netcon2 syz-executor.6 52788 490512 99403 32767 2 0x4000010 syz-executor.6 52788 410517 99403 32767 3 0x4000090 fsleep syz-executor.6 74671 152326 55008 32767 2 0x10 syz-executor.7 74671 522694 55008 32767 3 0x4000090 fsleep syz-executor.7 66406 436866 28885 32767 2 0x10 syz-executor.3 66406 109314 28885 32767 3 0x4000090 fsleep syz-executor.3 66406 328154 28885 32767 2 0x4000010 syz-executor.3 99403 322928 97864 32767 3 0x90 nanoslp syz-executor.6 97864 382060 21948 0 3 0x82 wait syz-executor.6 59095 159001 2033 32767 3 0x90 nanoslp syz-executor.1 2033 40679 21948 0 3 0x82 wait syz-executor.1 86383 21446 62079 32767 3 0x90 nanoslp syz-executor.4 62079 418600 21948 0 3 0x82 wait syz-executor.4 28885 490083 60470 32767 3 0x90 nanoslp syz-executor.3 60470 234697 21948 0 3 0x82 wait syz-executor.3 8140 395960 19034 32767 3 0x10 biowait syz-executor.5 19034 410786 21948 0 3 0x82 wait syz-executor.5 55008 263590 42021 32767 3 0x90 nanoslp syz-executor.7 42021 470884 21948 0 3 0x82 wait syz-executor.7 79667 222036 0 0 3 0x14200 bored sosplice 32612 116784 64046 32767 3 0x90 nanoslp syz-executor.2 64046 369007 21948 0 3 0x82 wait syz-executor.2 35462 152663 11811 32767 3 0x90 nanoslp syz-executor.0 11811 261542 21948 0 3 0x82 wait syz-executor.0 21948 404043 69153 0 3 0x2000082 thrsleep syz-fuzzer 21948 188943 69153 0 3 0x6000082 nanoslp syz-fuzzer 21948 416351 69153 0 3 0x6000082 wait syz-fuzzer 21948 208217 69153 0 3 0x6000082 wait syz-fuzzer 21948 134371 69153 0 3 0x6000082 wait syz-fuzzer 21948 253962 69153 0 3 0x6000082 thrsleep syz-fuzzer 21948 116315 69153 0 3 0x6000082 kqread syz-fuzzer 21948 328749 69153 0 3 0x6000082 wait syz-fuzzer 21948 422160 69153 0 3 0x6000082 wait syz-fuzzer 21948 265052 69153 0 3 0x6000082 thrsleep syz-fuzzer 21948 59742 69153 0 3 0x6000082 thrsleep syz-fuzzer 21948 9640 69153 0 3 0x6000082 wait syz-fuzzer 21948 348302 69153 0 3 0x6000082 wait syz-fuzzer 21948 320953 69153 0 3 0x6000082 thrsleep syz-fuzzer 21948 294602 69153 0 3 0x6000082 thrsleep syz-fuzzer 21948 404996 69153 0 3 0x6000082 wait syz-fuzzer 69153 42598 82251 0 3 0x10008a sigsusp ksh 82251 21886 72116 0 3 0x9a kqread sshd 60483 435228 1 0 3 0x100083 ttyin getty 72116 479176 1 0 3 0x88 kqread sshd 45396 390267 38581 73 3 0x1100090 kqread syslogd 38581 337867 1 0 3 0x100082 netio syslogd 7546 270166 1 0 3 0x100080 kqread resolvd 69825 137095 94395 77 3 0x100092 kqread dhcpleased 86827 517776 94395 77 3 0x100092 kqread dhcpleased 94395 43353 1 0 3 0x80 kqread dhcpleased 98537 459452 0 0 3 0x14200 bored smr 98853 287571 0 0 2 0x14200 zerothread 34910 130801 0 0 3 0x14200 aiodoned aiodoned 48164 342770 0 0 3 0x14200 syncer update 9861 473955 0 0 3 0x14200 cleaner cleaner 59034 264122 0 0 2 0x14200 reaper 59053 81796 0 0 3 0x14200 pgdaemon pagedaemon 71843 446481 0 0 3 0x14200 bored viomb 13341 468189 0 0 3 0x40014200 acpi0 acpi0 28782 373981 0 0 3 0x40014200 idle1 49826 94614 0 0 3 0x14200 bored softnet3 69819 355254 0 0 3 0x14200 bored softnet2 84235 240369 0 0 3 0x14200 bored softnet1 42572 509155 0 0 3 0x14200 bored softnet0 52488 401460 0 0 3 0x14200 bored systqmp 5023 115443 0 0 3 0x14200 bored systq 5531 398627 0 0 3 0x40014200 bored softclock 3153 311705 0 0 3 0x40014200 idle0 1 73190 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 90931 (syz-executor.2) thread 0xffff80002120c568 (481270) exclusive rwlock amaplk r = 0 (0xfffffd806b7ef1a0) #0 witness_lock+0x447 #1 uvm_fault_check+0x41a sys/uvm/uvm_fault.c:782 #2 uvm_fault+0xf2 sys/uvm/uvm_fault.c:600 #3 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 #4 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806fe4ea20) #0 witness_lock+0x447 #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1785 #2 uvm_fault_check+0x3e sys/uvm/uvm_fault.c:672 #3 uvm_fault+0xf2 sys/uvm/uvm_fault.c:600 #4 upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 #5 usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 #6 recall_trap+0x8 Process 8140 (syz-executor.5) thread 0xffff80002126b298 (395960) exclusive rrwlock inode r = 0 (0xfffffd806927f928) #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 (0xfffffd806be0de68) #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 10216 6413K 6420K 78643K 11332 0 pcb 13 12K 14K 78643K 17 0 rtable 236 6K 7K 78643K 766 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 45 0 iov 0 0K 24K 78643K 1988 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1278 80K 80K 78643K 4703 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 62 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 166 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 24 89K 117K 78643K 5405 0 sigio 0 0K 0K 78643K 605 0 proc 56 78K 115K 78643K 1102 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 2395 0 in_multi 99 7K 7K 78643K 260 0 ether_multi 1 0K 0K 78643K 1 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 235 1049K 1049K 78643K 235 0 exec 0 0K 1K 78643K 1254 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 417 89K 106K 78643K 55754 0 UVM aobj 131 4K 4K 78643K 159 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 177 0 NDP 11 0K 2K 78643K 63 0 temp 74 5920K 5986K 78643K 17263 0 kqueue 12 18K 34K 78643K 910 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 120 133 0 130 1 0 1 1 0 8 0 rtentry 112 253 0 142 4 0 4 4 0 8 0 unpcb 144 5404 0 5391 63 58 5 11 0 8 4 syncache 304 78 0 78 15 14 1 1 0 8 1 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 331 0 331 10 9 1 1 0 8 1 tcpcb 808 1618 0 1507 64 52 12 14 0 8 0 arp 120 44 0 25 1 0 1 1 0 8 0 ipq 40 4 0 4 3 3 0 1 0 8 0 ipqe 40 47 0 47 3 3 0 1 0 8 0 inpcb 368 4270 0 4149 83 72 11 14 0 8 0 nd6 136 68 0 44 1 0 1 1 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 1012 0 556 32 3 29 30 0 8 0 art_table 32 1013 0 556 4 0 4 4 0 8 0 art_node 16 252 0 151 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 8 3 2 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 161 0 151 1 0 1 1 0 8 0 shmpl 112 156 0 28 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 10845 0 9406 91 0 91 91 0 8 0 ffsino 272 10845 0 9406 97 0 97 97 0 8 0 nchpl 144 18149 0 16507 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 67041 0 67040 6 5 1 2 0 8 0 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 50722 0 50721 21 20 1 8 1 8 0 plimitpl 152 851 0 828 7 6 1 2 0 8 0 sigapl 424 5677 0 5623 7 0 7 7 0 8 0 futexpl 64 46449 0 46445 4 3 1 1 0 8 0 knotepl 120 729 0 0 12 2 10 10 0 8 0 kqueuepl 216 1449 0 1441 12 11 1 5 0 8 0 pipepl 320 1800 0 1772 52 44 8 11 0 8 5 fdescpl 496 5659 0 5624 7 2 5 6 0 8 0 filepl 152 47037 0 46684 127 109 18 23 0 8 4 lockfpl 104 809 0 807 2 0 2 2 0 8 1 lockfspl 48 247 0 245 1 0 1 1 0 8 0 sessionpl 144 35 0 19 1 0 1 1 0 8 0 pgrppl 48 47 0 31 1 0 1 1 0 8 0 ucredpl 104 16308 0 16290 1 0 1 1 0 8 0 zombiepl 144 5625 0 5623 1 0 1 1 0 8 0 processpl 1072 5677 0 5623 4 0 4 4 0 8 0 procpl 680 15361 0 15284 26 18 8 8 0 8 1 sosppl 168 79 0 78 12 11 1 1 0 8 0 sockpl 488 9930 0 9799 281 264 17 39 0 8 0 mcl64k 65536 19 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 14 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 25 0 0 3 0 3 3 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 353 0 0 35 8 27 35 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 2025 0 0 108 0 108 108 0 8 0 bufpl 288 13433 0 7108 452 0 452 452 0 8 0 anonpl 24 652306 0 641339 178 100 78 98 0 186 0 amapchunkpl 152 176398 0 175501 100 54 46 49 0 158 8 amappl16 200 14156 0 13850 92 73 19 30 0 8 0 amappl15 192 11 0 11 1 1 0 1 0 8 0 amappl14 184 193 0 177 2 1 1 2 0 8 0 amappl13 176 12 0 11 2 1 1 1 0 8 0 amappl12 168 6514 0 6471 2 0 2 2 0 8 0 amappl11 160 48 0 38 1 0 1 1 0 8 0 amappl10 152 86 0 73 1 0 1 1 0 8 0 amappl9 144 285 0 285 13 12 1 1 0 8 1 amappl8 136 518 0 377 5 0 5 5 0 8 0 amappl7 128 104 0 90 2 0 2 2 0 8 0 amappl6 120 401 0 376 1 0 1 1 0 8 0 amappl5 112 413 0 404 1 0 1 1 0 8 0 amappl4 104 776 0 733 2 0 2 2 0 8 0 amappl3 96 34718 0 34616 5 2 3 4 0 8 0 amappl2 88 6149 0 6074 3 1 2 3 0 8 0 amappl1 80 28537 0 28007 22 9 13 22 0 8 1 amappl 88 54681 0 54414 8 1 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 72 158 0 28 3 0 3 3 0 8 0 uaddrrnd 24 5659 0 5624 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5659 0 5624 1 0 1 1 0 8 0 vmmpekpl 168 50501 0 50446 3 0 3 3 0 8 0 vmmpepl 168 350621 0 348141 211 88 123 128 0 357 10 vmsppl 464 5658 0 5624 7 2 5 6 0 8 0 rwobjpl 56 96402 0 88935 116 10 106 109 0 8 0 pdppl 4096 11326 0 11248 366 284 82 92 0 8 4 pvpl 32 1796589 0 1779034 448 296 152 334 0 265 0 pmappl 248 5658 0 5624 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1379 0 444 27 0 27 27 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82bbdff0) 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+0x29 kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 sys/dev/kcov.c:158 __mp_lock(ffffffff82d841f0) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d841f0) at __mp_lock+0x133 sys/kern/kern_lock.c:147 intr_handler(ffff8000295b16e0,ffff80000007b080) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff82d841f0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d841f0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 pmap_enter(fffffd806fe5e8c8,76dd1bda000,7522b000,3,21) at pmap_enter+0x9b7 pmap_unmap_ptes sys/arch/amd64/amd64/pmap.c:444 [inline] pmap_enter(fffffd806fe5e8c8,76dd1bda000,7522b000,3,21) at pmap_enter+0x9b7 sys/arch/amd64/amd64/pmap.c:2892 uvm_fault_lower(ffff8000295b1b60,ffff8000295b1b98,ffff8000295b1ae0,0) at uvm_fault_lower+0x768 sys/uvm/uvm_fault.c:1518 uvm_fault(fffffd806fe4e928,76dd1bda000,0,1) at uvm_fault+0x238 upageflttrap(ffff8000295b1ce0,76dd1bda080) at upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 end trace frame: 0xffff8000295b1cd0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82bbdff0) 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+0x29 kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x29 sys/dev/kcov.c:158 __mp_lock(ffffffff82d841f0) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d841f0) at __mp_lock+0x133 sys/kern/kern_lock.c:147 intr_handler(ffff8000295b16e0,ffff80000007b080) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff82d841f0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d841f0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 pmap_enter(fffffd806fe5e8c8,76dd1bda000,7522b000,3,21) at pmap_enter+0x9b7 pmap_unmap_ptes sys/arch/amd64/amd64/pmap.c:444 [inline] pmap_enter(fffffd806fe5e8c8,76dd1bda000,7522b000,3,21) at pmap_enter+0x9b7 sys/arch/amd64/amd64/pmap.c:2892 uvm_fault_lower(ffff8000295b1b60,ffff8000295b1b98,ffff8000295b1ae0,0) at uvm_fault_lower+0x768 sys/uvm/uvm_fault.c:1518 uvm_fault(fffffd806fe4e928,76dd1bda000,0,1) at uvm_fault+0x238 upageflttrap(ffff8000295b1ce0,76dd1bda080) at upageflttrap+0x86 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff8000295b1ce0) at usertrap+0x226 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7bdd5eac63c0, count: -16 ddb{0}> machine ddbcpu 1 Stopped at witness_checkorder+0x1ec: movl 0x8(%r14),%ebx witness_checkorder(fffffd807e82b010,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd807e82b000) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002126aff0,fffffd807e82b000,fffffd807e82b088,4,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002126aff0,4) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002126aff0) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002126aff0,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002126aff0,ffff800029569910,ffff800029569960) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000295699e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000295699e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75c457f5cbc0, count: 6 ddb{1}> trace witness_checkorder(fffffd807e82b010,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd807e82b000) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002126aff0,fffffd807e82b000,fffffd807e82b088,4,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002126aff0,4) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002126aff0) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002126aff0,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002126aff0,ffff800029569910,ffff800029569960) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff8000295699e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000295699e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75c457f5cbc0, count: -9