uvm_fault(0xffffffff8391e288, 0xffff80003ca36e08, 0, 1) -> e kernel: page fault trap, code=0 Stopped at mtx_enter+0x6e: movq 0(%r14),%r15 TID PID UID PRFLAGS PFLAGS CPU COMMAND mtx_enter(ffff80003ca36e08) at mtx_enter+0x6e sys/kern/kern_lock.c:549 filt_procdetach(fffffd806c992a60) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff80003c93afb0,fffffd807e7e35c0,fffffd807e7e3638,0,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline] knote_remove(ffff80003c93afb0,fffffd807e7e35c0,fffffd807e7e3638,0,1) at knote_remove+0x22e sys/kern/kern_event.c:2154 kqueue_purge(ffff80003c93afb0,fffffd807e7e35c0) at kqueue_purge+0x117 sys/kern/kern_event.c:1890 kqueue_close(fffffd80615cd258,ffff80003c93afb0) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd80615cd258,ffff80003c93afb0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80615cd258,ffff80003c93afb0) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c93afb0) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80003c93afb0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c93afb0,ffff80003c939d00,ffff80003c939c50) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c939d00) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c939d00) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72b0adc805b0, count: 3 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xffffffff8391e288, 0xffff80003ca36e08, 0, 1) -> e ddb> trace mtx_enter(ffff80003ca36e08) at mtx_enter+0x6e sys/kern/kern_lock.c:549 filt_procdetach(fffffd806c992a60) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff80003c93afb0,fffffd807e7e35c0,fffffd807e7e3638,0,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline] knote_remove(ffff80003c93afb0,fffffd807e7e35c0,fffffd807e7e3638,0,1) at knote_remove+0x22e sys/kern/kern_event.c:2154 kqueue_purge(ffff80003c93afb0,fffffd807e7e35c0) at kqueue_purge+0x117 sys/kern/kern_event.c:1890 kqueue_close(fffffd80615cd258,ffff80003c93afb0) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd80615cd258,ffff80003c93afb0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80615cd258,ffff80003c93afb0) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c93afb0) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80003c93afb0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c93afb0,ffff80003c939d00,ffff80003c939c50) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c939d00) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c939d00) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72b0adc805b0, count: -12 ddb> show registers rdi 0 rsi 0 rbp 0xffff80003c939910 rbx 0xfffffd806c992a00 rdx 0 rcx 0 rax 0xffff80003c93af00 r8 0x1 r9 0 r10 0xdcb022516660b45c r11 0x84da7885a10e23ca r12 0x1b r13 0xffff80003ca36d28 r14 0xffff80003ca36e08 r15 0 rip 0xffffffff81c34dde mtx_enter+0x6e cs 0x8 rflags 0x10297 __ALIGN_SIZE+0xf297 rsp 0xffff80003c9398e0 ss 0x10 mtx_enter+0x6e: movq 0(%r14),%r15 ddb> show proc PROC (syz-executor) tid=19238 pid=52523 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=85, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c93afb0 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003c93b778,0xffff80003a927790 process=0xffff8000ffffb618 user=0xffff80003c934000, vmspace=0xfffffd806c9b18b0 estcpu=35, cpticks=7, pctcpu=0.6, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 89289 447402 78845 0 3 0x4000080 nanoslp syz-executor 89289 287747 78845 0 3 0x4000080 kqpoll syz-executor 11299 174443 3996 0 2 0 syz-executor 11299 474417 3996 0 3 0x4000080 fsleep syz-executor 62562 492858 56415 60929 2 0x10 syz-executor 62562 156340 56415 60929 3 0x4000090 fsleep syz-executor 14690 311204 0 0 3 0x14280 nfsidl nfsio 30920 326714 0 0 3 0x14280 nfsidl nfsio 73693 163571 0 0 3 0x14280 nfsidl nfsio 69082 498083 0 0 3 0x14280 nfsidl nfsio 58643 127238 40089 0 2 0x10 syz-executor 58643 478444 40089 0 3 0x4000090 fsleep syz-executor 13584 280206 4377 0 2 0 syz-executor 13584 310189 4377 0 3 0x4000080 ttyout syz-executor 13584 341372 4377 0 3 0x4000080 ttyout syz-executor 13584 459067 4377 0 3 0x4000080 ttyout syz-executor 13584 457191 4377 0 3 0x4000080 fsleep syz-executor 13584 411813 4377 0 3 0x4000080 fsleep syz-executor 33301 127395 0 0 3 0x14200 acct acct 56415 25823 71211 0 3 0x82 nanoslp syz-executor 3996 82366 71211 0 3 0x82 nanoslp syz-executor 97225 518594 71211 0 3 0x82 nanoslp syz-executor 78845 322102 71211 0 3 0x82 nanoslp syz-executor 40089 230340 71211 0 3 0x82 nanoslp syz-executor 94624 80033 71211 0 3 0x82 nanoslp syz-executor 44767 34454 71211 0 2 0x2 syz-executor 4377 298933 71211 0 3 0x82 nanoslp syz-executor 71211 419564 44387 0 3 0x82 kqread syz-executor 44387 180087 54974 0 3 0x10008a sigsusp ksh 54974 241879 13834 0 3 0x98 kqread sshd-session 13834 202309 21398 0 3 0x92 kqread sshd-session 56157 203717 1 0 3 0x100083 ttyin getty 21398 106185 1 0 3 0x88 kqread sshd 94236 327403 59059 73 2 0x1100010 syslogd 59059 171911 1 0 3 0x100082 sbwait syslogd 48156 192370 1 0 3 0x100080 kqread resolvd 15478 43393 56966 77 3 0x100092 kqread dhcpleased 96638 187127 56966 77 3 0x100092 kqread dhcpleased 56966 513202 1 0 3 0x80 kqread dhcpleased 25191 400336 0 0 3 0x14200 bored smr 85849 497254 0 0 2 0x14200 zerothread 31329 505313 0 0 3 0x14200 aiodoned aiodoned 87609 521701 0 0 3 0x14200 syncer update 21360 73835 0 0 3 0x14200 cleaner cleaner 41239 383625 0 0 3 0x14200 reaper reaper 51996 212707 0 0 3 0x14200 pgdaemon pagedaemon 11677 519936 0 0 3 0x14200 bored viomb 29736 176159 0 0 3 0x40014200 acpi0 acpi0 2945 58102 0 0 3 0x14200 bored softnet0 92603 51651 0 0 3 0x14200 bored systqmp 4436 306167 0 0 3 0x14200 bored systq 17945 14312 0 0 3 0x40014200 tmoslp softclock 29026 248292 0 0 3 0x40014200 idle0 1 99239 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11056 12356K 13279K 166960K 13188 0 pcb 17 14K 15K 166960K 85 0 rtable 213 7K 9K 166960K 429 0 pf 31 13K 16K 166960K 52 0 ifaddr 36 6K 7K 166960K 58 0 ifgroup 51 2K 2K 166960K 76 0 sysctl 4 1K 9K 166960K 12 0 counters 35 17K 18K 166960K 46 0 ioctlops 0 0K 4K 166960K 71 0 iov 0 0K 20K 166960K 25 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1402 88K 88K 166960K 1773 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 21 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 236K 166960K 461 0 sigio 0 0K 0K 166960K 12 0 proc 61 59K 91K 166960K 498 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 0 0K 0K 166960K 98 0 in_multi 74 5K 7K 166960K 116 0 ether_multi 1 0K 0K 166960K 3 0 mrt 1 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 380 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 231 151K 166K 166960K 5700 0 UVM aobj 43 6K 6K 166960K 44 0 pinsyscall 38 76K 94K 166960K 1536 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 14 0 NDP 11 0K 1K 166960K 37 0 temp 48 8664K 8728K 166960K 23848 0 kqueue 18 25K 29K 166960K 83 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 64 0 60 1 0 1 1 0 8 0 rtentry 136 123 0 33 4 0 4 4 0 8 0 unpcb 144 234 0 217 2 0 2 2 0 8 1 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpqe 32 3 0 3 1 0 1 1 0 8 1 tcpcb 736 79 0 71 2 0 2 2 0 8 1 arp 96 18 0 4 1 0 1 1 0 8 0 ipq 40 2 0 1 1 0 1 1 0 8 0 ipqe 40 3 0 2 1 0 1 1 0 8 0 inpcb 328 445 0 431 13 3 10 13 0 8 8 ip6q 72 6 0 2 1 0 1 1 0 8 0 ip6af 40 7 0 4 1 0 1 1 0 8 0 nd6 112 25 0 9 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 mppekey 1024 2 0 0 1 0 1 1 0 8 0 ppxss 1072 11 0 9 1 0 1 1 0 8 0 pppxif 1384 2 0 0 1 0 1 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 482 0 128 30 0 30 30 0 8 6 art_table 40 486 0 128 5 0 5 5 0 8 0 art_node 32 121 0 38 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 17 0 7 1 0 1 1 0 8 0 shmpl 112 39 0 1 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2194 0 696 95 0 95 95 0 8 0 ffsino 256 2194 0 696 95 0 95 95 0 8 0 nchpl 144 2830 0 1137 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 vnodes 216 2539 0 0 142 0 142 142 0 8 0 namei 1024 8956 0 8956 2 0 2 2 0 8 2 vcpupl 3904 2 0 0 1 0 1 1 0 8 0 vmpool 808 2 0 0 1 0 1 1 0 8 0 kstatmem 264 40 0 18 2 0 2 2 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 10149 0 10149 8 0 8 8 1 8 8 plimitpl 152 109 0 93 1 0 1 1 0 8 0 sigapl 424 979 0 932 31 5 26 31 0 8 20 knotepl 120 24557 0 24277 11 0 11 11 0 8 2 kqueuepl 184 180 0 103 4 0 4 4 0 8 0 pipepl 304 201 0 174 8 0 8 8 0 8 5 fdescpl 448 726 0 697 5 0 5 5 0 8 1 filepl 120 4081 0 3785 14 0 14 14 0 8 4 lockfpl 104 87 0 85 1 0 1 1 0 8 0 lockfspl 48 42 0 40 1 0 1 1 0 8 0 sessionpl 144 23 0 15 1 0 1 1 0 8 0 pgrppl 48 32 0 16 1 0 1 1 0 8 0 ucredpl 104 546 0 533 1 0 1 1 0 8 0 zombiepl 144 934 0 932 1 0 1 1 0 8 0 processpl 1152 979 0 932 20 3 17 20 0 8 13 procpl 664 1460 0 1404 25 4 21 25 0 8 15 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 552 762 0 727 13 1 12 13 0 8 8 mcl64k 65536 54 0 54 1 0 1 1 0 8 1 mcl9k 9216 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 8 0 8 1 0 1 1 0 8 1 mcl4k 4096 2883 0 2828 15 0 15 15 0 8 8 mcl2k 2048 732 0 727 3 0 3 3 0 8 2 mtagpl 96 30 0 8 1 0 1 1 0 8 0 mbufpl 256 8763 0 8584 79 55 24 79 0 8 8 bufpl 280 3419 0 122 236 0 236 236 0 8 0 anonpl 24 94012 0 90426 44 0 44 44 0 187 15 amapchunkpl 152 17181 0 16704 27 0 27 27 0 158 4 amappl16 200 871 0 812 15 3 12 15 0 8 8 amappl15 192 1 0 0 1 0 1 1 0 8 0 amappl14 184 2 0 2 1 0 1 1 0 8 1 amappl13 176 402 0 401 1 0 1 1 0 8 0 amappl12 168 1071 0 1033 2 0 2 2 0 8 0 amappl10 152 77 0 67 1 0 1 1 0 8 0 amappl9 144 254 0 254 1 0 1 1 0 8 1 amappl8 136 15 0 14 1 0 1 1 0 8 0 amappl7 128 74 0 73 1 0 1 1 0 8 0 amappl6 120 354 0 342 1 0 1 1 0 8 0 amappl5 112 67 0 59 1 0 1 1 0 8 0 amappl4 104 382 0 356 1 0 1 1 0 8 0 amappl3 96 3331 0 3228 3 0 3 3 0 8 0 amappl2 88 518 0 464 2 0 2 2 0 8 0 amappl1 80 10626 0 10095 13 0 13 13 0 8 0 amappl 88 4924 0 4761 5 0 5 5 0 92 1 uvmvnodes 80 112 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma2048 2048 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 253 0 253 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 43 0 1 1 0 1 1 0 8 0 uaddrrnd 24 726 0 697 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 726 0 697 1 0 1 1 0 8 0 vmmpekpl 168 8290 0 8244 3 0 3 3 0 8 0 vmmpepl 168 51833 0 50024 88 0 88 88 0 357 7 vmsppl 368 725 0 697 4 0 4 4 0 8 1 rwobjpl 40 15619 0 14601 13 0 13 13 0 8 2 pdppl 4096 1462 0 1396 101 33 68 80 0 8 2 pvpl 32 298901 0 289735 109 0 109 109 0 265 22 pmappl 216 727 0 697 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 447 0 88 12 0 12 12 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace mtx_enter(ffff80003ca36e08) at mtx_enter+0x6e sys/kern/kern_lock.c:549 filt_procdetach(fffffd806c992a60) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff80003c93afb0,fffffd807e7e35c0,fffffd807e7e3638,0,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline] knote_remove(ffff80003c93afb0,fffffd807e7e35c0,fffffd807e7e3638,0,1) at knote_remove+0x22e sys/kern/kern_event.c:2154 kqueue_purge(ffff80003c93afb0,fffffd807e7e35c0) at kqueue_purge+0x117 sys/kern/kern_event.c:1890 kqueue_close(fffffd80615cd258,ffff80003c93afb0) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd80615cd258,ffff80003c93afb0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80615cd258,ffff80003c93afb0) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c93afb0) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80003c93afb0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c93afb0,ffff80003c939d00,ffff80003c939c50) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c939d00) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c939d00) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72b0adc805b0, count: -12 ddb> machine ddbcpu 1 No such command ddb> trace mtx_enter(ffff80003ca36e08) at mtx_enter+0x6e sys/kern/kern_lock.c:549 filt_procdetach(fffffd806c992a60) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff80003c93afb0,fffffd807e7e35c0,fffffd807e7e3638,0,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline] knote_remove(ffff80003c93afb0,fffffd807e7e35c0,fffffd807e7e3638,0,1) at knote_remove+0x22e sys/kern/kern_event.c:2154 kqueue_purge(ffff80003c93afb0,fffffd807e7e35c0) at kqueue_purge+0x117 sys/kern/kern_event.c:1890 kqueue_close(fffffd80615cd258,ffff80003c93afb0) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd80615cd258,ffff80003c93afb0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80615cd258,ffff80003c93afb0) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c93afb0) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80003c93afb0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c93afb0,ffff80003c939d00,ffff80003c939c50) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c939d00) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c939d00) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72b0adc805b0, count: -12