uvm_fault(0xfffffd8069a81758, 0x4d00000056, 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 126432 80369 0 0 0x4000000 0 syz-executor.1 witness_checkorder(fffffd806ef77be0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806ef77bd0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002121a808,fffffd806ef77bd0,fffffd806ef77c58,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121a808,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121a808) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121a808,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121a808,ffff800023b67bf0,ffff800023b67c40) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800023b67cc0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800023b67cc0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7dc68fb98810, 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(0xfffffd8069a81758, 0x4d00000056, 0, 1) -> e ddb{1}> trace witness_checkorder(fffffd806ef77be0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806ef77bd0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002121a808,fffffd806ef77bd0,fffffd806ef77c58,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121a808,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121a808) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121a808,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121a808,ffff800023b67bf0,ffff800023b67c40) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800023b67cc0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800023b67cc0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7dc68fb98810, count: -9 ddb{1}> show registers rdi 0 rsi 0x20000 acpi_pdirpa+0xbe63 rbp 0xffff800023b67990 rbx 0xe rdx 0 rcx 0xffff80002121a808 rax 0xffff800020d58ff0 r8 0x1 r9 0x1 r10 0x6aa88e7a541789c4 r11 0xaae4219edc0f76f r12 0 r13 0xfffffd806ef77be0 r14 0x4d0000004e r15 0xffff80002121a808 rip 0xffffffff81009f9c witness_checkorder+0x1ec cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800023b678e0 ss 0x10 witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{1}> show proc PROC (syz-executor.4) pid=481239 stat=onproc flags process=1008 proc=2000 pri=0, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80002121a560,0xffff80002121a2c8 process=0xffff8000212e1938 user=0xffff800023b62000, vmspace=0xfffffd8069a81758 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 2575 359406 38808 0 2 0 syz-executor.2 2575 202685 38808 0 3 0x4000080 netcon syz-executor.2 87589 435271 99670 0 3 0x80 nanoslp syz-executor.7 87589 197548 99670 0 3 0x4000080 netcon2 syz-executor.7 87589 337827 99670 0 3 0x4000080 fsleep syz-executor.7 80369 220141 60533 0 2 0 syz-executor.1 80369 126432 60533 0 7 0x4000000 syz-executor.1 52119 95366 5614 0 2 0 syz-executor.5 52119 244964 5614 0 3 0x4000080 fsleep syz-executor.5 52119 287642 5614 0 3 0x4000080 fsleep syz-executor.5 52119 288578 5614 0 3 0x4000080 fsleep syz-executor.5 5614 126143 94684 0 3 0x82 nanoslp syz-executor.5 60533 161405 94684 0 3 0x82 nanoslp syz-executor.1 67739 150047 94684 0 3 0x2 biowait syz-executor.0 94490 97023 94684 0 3 0x82 nanoslp syz-executor.4 72590 41933 1 0 3 0x100083 ttyin getty 13049 343842 94684 0 3 0x2 biowait syz-executor.6 94335 101098 0 0 3 0x14200 acct acct 4541 488494 0 0 3 0x14200 bored sosplice 72693 244228 0 0 3 0x14280 nfsidl nfsio 90512 259289 0 0 3 0x14280 nfsidl nfsio 48790 350264 0 0 3 0x14280 nfsidl nfsio 23157 295407 0 0 3 0x14280 nfsidl nfsio 94753 246274 0 0 3 0x14280 nfsidl nfsio 23158 351220 0 0 3 0x14280 nfsidl nfsio 23622 201907 0 0 3 0x14280 nfsidl nfsio 93953 684 0 0 3 0x14280 nfsidl nfsio 27947 128721 0 0 3 0x14280 nfsidl nfsio 34924 34614 0 0 3 0x14280 nfsidl nfsio 75336 437894 0 0 3 0x14280 nfsidl nfsio 41883 514058 0 0 3 0x14280 nfsidl nfsio 43892 46447 0 0 3 0x14280 nfsidl nfsio 84132 240263 0 0 3 0x14280 nfsidl nfsio 52294 309941 0 0 3 0x14280 nfsidl nfsio 61609 370597 0 0 3 0x14280 nfsidl nfsio 31975 297435 0 0 3 0x14280 nfsidl nfsio 82193 234563 0 0 3 0x14280 nfsidl nfsio 56281 474452 0 0 3 0x14280 nfsidl nfsio 65528 346426 0 0 3 0x14280 nfsidl nfsio 38808 178474 94684 0 3 0x82 nanoslp syz-executor.2 99670 194604 94684 0 3 0x82 nanoslp syz-executor.7 53787 190885 94684 0 2 0x2 syz-executor.3 94684 361664 30237 0 3 0x2000082 wait syz-fuzzer 94684 297963 30237 0 3 0x6000082 nanoslp syz-fuzzer 94684 38631 30237 0 3 0x6000082 wait syz-fuzzer 94684 134906 30237 0 3 0x6000082 wait syz-fuzzer 94684 98635 30237 0 3 0x6000082 wait syz-fuzzer 94684 202829 30237 0 3 0x6000082 thrsleep syz-fuzzer 94684 463417 30237 0 3 0x6000082 thrsleep syz-fuzzer 94684 136735 30237 0 3 0x6000082 thrsleep syz-fuzzer 94684 73138 30237 0 3 0x6000082 wait syz-fuzzer 94684 23482 30237 0 3 0x6000082 wait syz-fuzzer 94684 48978 30237 0 3 0x6000082 thrsleep syz-fuzzer 94684 341467 30237 0 3 0x6000082 wait syz-fuzzer 94684 84293 30237 0 3 0x6000082 wait syz-fuzzer 94684 222208 30237 0 3 0x6000082 thrsleep syz-fuzzer 94684 520478 30237 0 3 0x6000082 thrsleep syz-fuzzer 94684 159814 30237 0 3 0x6000082 kqread syz-fuzzer 30237 114279 28869 0 3 0x10008a sigsusp ksh 28869 82150 70796 0 3 0x9a kqread sshd 70796 458489 1 0 3 0x88 kqread sshd 7237 206632 15557 74 3 0x1100092 bpf pflogd 15557 8050 1 0 3 0x80 netio pflogd 10392 222661 91644 73 3 0x1100090 kqread syslogd 91644 38419 1 0 3 0x100082 netio syslogd 78697 328652 1 0 3 0x100080 kqread resolvd 93437 104305 38865 77 3 0x100092 kqread dhcpleased 23169 115541 38865 77 3 0x100092 kqread dhcpleased 38865 195990 1 0 3 0x80 kqread dhcpleased 39359 112437 0 0 3 0x14200 bored smr 69891 211816 0 0 2 0x14200 zerothread 97899 48158 0 0 3 0x14200 aiodoned aiodoned 20470 448863 0 0 3 0x14200 syncer update 45118 284217 0 0 3 0x14200 cleaner cleaner 1605 201319 0 0 2 0x14200 reaper 7084 484019 0 0 3 0x14200 pgdaemon pagedaemon 41676 320258 0 0 3 0x14200 bored viomb 93306 77370 0 0 3 0x40014200 acpi0 acpi0 41260 392770 0 0 3 0x40014200 idle1 90565 106992 0 0 3 0x14200 bored softnet3 58091 108802 0 0 3 0x14200 bored softnet2 2094 11459 0 0 3 0x14200 bored softnet1 64361 360833 0 0 3 0x14200 bored softnet0 95271 119441 0 0 3 0x14200 bored systqmp 93326 400090 0 0 3 0x14200 bored systq 3537 446814 0 0 3 0x40014200 bored softclock 47136 107942 0 0 3 0x40014200 idle0 1 468430 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 67739 (syz-executor.0) thread 0xffff8000212a6ff0 (150047) exclusive rrwlock inode r = 0 (0xfffffd8065ad03c8) #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 (0xfffffd8078a431b0) #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 Process 13049 (syz-executor.6) thread 0xffff8000212a7d38 (343842) exclusive rrwlock inode r = 0 (0xfffffd8065ad0e68) #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 (0xfffffd806c0be2b8) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10315 6774K 8166K 78643K 30168 0 pcb 13 11K 12K 78643K 194 0 rtable 245 7K 7K 78643K 772 0 pf 32 9K 10K 78643K 135 0 ifaddr 45 15K 16K 78643K 127 0 ifgroup 55 2K 2K 78643K 213 0 sysctl 2 0K 1K 78643K 5 0 counters 60 35K 36K 78643K 146 0 ioctlops 0 0K 4K 78643K 1670 0 iov 0 0K 24K 78643K 441 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1442 90K 90K 78643K 7861 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 51 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1690 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 15 53K 93K 78643K 4647 0 sigio 0 0K 0K 78643K 192 0 proc 70 91K 128K 78643K 1025 0 subproc 104 6K 6K 78643K 247 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 190 0 in_multi 99 7K 7K 78643K 284 0 ether_multi 1 0K 0K 78643K 8 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 313 1394K 1394K 78643K 313 0 exec 0 0K 1K 78643K 1185 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 395 89K 95K 78643K 47602 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 107 0 NDP 12 0K 1K 78643K 93 0 temp 74 5920K 6048K 78643K 49451 0 kqueue 12 18K 26K 78643K 223 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 120 188 0 185 3 2 1 3 0 8 0 rtentry 112 247 0 133 4 0 4 4 0 8 0 unpcb 144 1716 0 1699 22 21 1 6 0 8 0 syncache 304 69 0 69 10 10 0 1 0 8 0 tcpqe 32 326 0 326 9 9 0 2 0 8 0 tcpcb 808 1376 0 1362 37 29 8 8 0 8 6 arp 120 42 0 23 1 0 1 1 0 8 0 inpcb 368 2726 0 2705 53 45 8 14 0 8 5 nd6 136 66 0 39 1 0 1 1 0 8 0 kcovpl 48 19 0 11 1 0 1 1 0 8 0 ppxss 1256 10 0 10 3 3 0 1 0 8 0 pffrag 232 20 0 17 2 1 1 1 0 482 0 pffrnode 88 20 0 17 2 1 1 1 0 8 0 pffrent 40 64 0 61 2 1 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 24 162 0 140 1 0 1 1 0 8 0 pfstkey 128 162 0 140 2 0 2 2 0 8 0 pfstate 376 162 0 140 6 3 3 4 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 256 974 0 507 30 0 30 30 0 8 0 art_table 32 975 0 507 4 0 4 4 0 8 0 art_node 16 242 0 138 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 3 1 0 1 1 0 8 0 semapl 112 1688 0 1678 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 7212 0 5733 93 0 93 93 0 8 0 ffsino 272 7212 0 5733 100 0 100 100 0 8 0 nchpl 144 13196 0 11540 64 0 64 64 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 46890 0 46889 3 2 1 2 0 8 0 percpumem 16 86 0 43 1 0 1 1 0 8 0 vmpool 696 18 0 18 5 4 1 1 0 8 1 kstatmem 264 110 0 86 2 0 2 2 0 8 0 scxspl 216 44030 0 44028 20 19 1 8 1 8 0 plimitpl 152 334 0 318 1 0 1 1 0 8 0 sigapl 424 4976 0 4909 10 2 8 8 0 8 0 futexpl 64 39085 0 39081 4 3 1 1 0 8 0 knotepl 120 145 0 0 4 0 4 4 0 8 0 kqueuepl 216 744 0 736 22 21 1 5 0 8 0 pipepl 320 1158 0 1128 39 31 8 11 0 8 5 fdescpl 496 4937 0 4909 5 1 4 5 0 8 0 filepl 152 28435 0 28178 68 52 16 18 0 8 3 lockfpl 104 9810 0 9803 19 15 4 4 0 8 2 lockfspl 48 4787 0 4780 3 1 2 2 0 8 1 sessionpl 144 38 0 21 1 0 1 1 0 8 0 pgrppl 48 53 0 36 1 0 1 1 0 8 0 ucredpl 104 3946 0 3934 1 0 1 1 0 8 0 zombiepl 144 4910 0 4909 1 0 1 1 0 8 0 processpl 1072 4976 0 4909 5 0 5 5 0 8 0 procpl 680 13070 0 12980 13 4 9 10 0 8 0 sosppl 168 39 0 37 5 4 1 1 0 8 0 sockpl 488 4630 0 4592 116 103 13 29 0 8 7 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 12 0 0 2 0 2 2 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 13 0 0 1 0 1 1 0 8 0 mcl8k 8192 25 0 0 4 1 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 426 0 0 41 0 41 41 0 8 0 mtagpl 96 497 0 0 12 0 12 12 0 8 0 mbufpl 256 1130 0 0 65 0 65 65 0 8 0 bufpl 288 11792 0 5468 452 0 452 452 0 8 0 anonpl 24 613403 0 599337 148 57 91 114 0 186 0 amapchunkpl 152 150441 0 149503 66 27 39 50 0 158 0 amappl16 200 13388 0 13017 48 27 21 33 0 8 0 amappl15 192 26 0 25 2 1 1 1 0 8 0 amappl14 184 200 0 185 2 1 1 2 0 8 0 amappl13 176 13 0 13 1 1 0 1 0 8 0 amappl12 168 5785 0 5755 3 1 2 2 0 8 0 amappl11 160 57 0 43 1 0 1 1 0 8 0 amappl10 152 51 0 37 1 0 1 1 0 8 0 amappl9 144 297 0 297 10 9 1 1 0 8 1 amappl8 136 394 0 287 5 0 5 5 0 8 0 amappl7 128 92 0 77 2 0 2 2 0 8 0 amappl6 120 372 0 342 2 1 1 2 0 8 0 amappl5 112 303 0 291 1 0 1 1 0 8 0 amappl4 104 725 0 679 3 1 2 3 0 8 0 amappl3 96 29370 0 29276 4 1 3 3 0 8 0 amappl2 88 5324 0 5252 3 1 2 3 0 8 0 amappl1 80 26872 0 26309 24 12 12 23 0 8 0 amappl 88 46879 0 46629 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 4955 0 4927 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4955 0 4927 1 0 1 1 0 8 0 vmmpekpl 168 41853 0 41772 5 1 4 4 0 8 0 vmmpepl 168 311405 0 309058 218 91 127 130 0 357 12 vmsppl 464 4954 0 4927 5 1 4 5 0 8 0 rwobjpl 56 86210 0 78606 115 5 110 111 0 8 0 pdppl 4096 9918 0 9854 360 290 70 84 0 8 6 pvpl 32 1629915 0 1609743 468 300 168 366 0 265 0 pmappl 248 4954 0 4927 3 1 2 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1269 0 376 26 0 26 26 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82b79ff0) 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 __mp_lock(ffffffff82d8c508) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d8c508) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800022d36ed0,ffff80000007b080) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff82d8c508) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d8c508) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvn_io(fffffd8078816468,ffff800022d370f0,1,202,0) at uvn_io+0x2f0 sys/uvm/uvm_vnode.c:1262 uvn_get(fffffd8078816468,c000,ffff800022d371b8,ffff800022d37188,0,1,3f2ea170700d4e76,0) at uvn_get+0x1df sys/uvm/uvm_vnode.c:1110 uvm_fault_lower(ffff800022d37320,ffff800022d37358,ffff800022d372a0,0) at uvm_fault_lower+0x361 sys/uvm/uvm_fault.c:1284 uvm_fault(fffffd806efc8578,2000c000,0,1) at uvm_fault+0x238 kpageflttrap(ffff800022d374c0,2000c600) at kpageflttrap+0x252 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff800022d374c0) at kerntrap+0xf3 sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff800022d37610, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82b79ff0) 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 __mp_lock(ffffffff82d8c508) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d8c508) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800022d36ed0,ffff80000007b080) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff82d8c508) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d8c508) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvn_io(fffffd8078816468,ffff800022d370f0,1,202,0) at uvn_io+0x2f0 sys/uvm/uvm_vnode.c:1262 uvn_get(fffffd8078816468,c000,ffff800022d371b8,ffff800022d37188,0,1,3f2ea170700d4e76,0) at uvn_get+0x1df sys/uvm/uvm_vnode.c:1110 uvm_fault_lower(ffff800022d37320,ffff800022d37358,ffff800022d372a0,0) at uvm_fault_lower+0x361 sys/uvm/uvm_fault.c:1284 uvm_fault(fffffd806efc8578,2000c000,0,1) at uvm_fault+0x238 kpageflttrap(ffff800022d374c0,2000c600) at kpageflttrap+0x252 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff800022d374c0) at kerntrap+0xf3 sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b _copyin() at _copyin+0x62 syscall(ffff800022d376f0) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800022d376f0) at syscall+0x606 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6f96b304df0, count: -17 ddb{0}> machine ddbcpu 1 Stopped at witness_checkorder+0x1ec: movl 0x8(%r14),%ebx witness_checkorder(fffffd806ef77be0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806ef77bd0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002121a808,fffffd806ef77bd0,fffffd806ef77c58,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121a808,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121a808) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121a808,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121a808,ffff800023b67bf0,ffff800023b67c40) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800023b67cc0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800023b67cc0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7dc68fb98810, count: 6 ddb{1}> trace witness_checkorder(fffffd806ef77be0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806ef77bd0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002121a808,fffffd806ef77bd0,fffffd806ef77c58,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121a808,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121a808) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121a808,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002121a808,ffff800023b67bf0,ffff800023b67c40) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800023b67cc0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800023b67cc0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7dc68fb98810, count: -9