uvm_fault(0xffffffff83967770, 0xffff8000ffff3bb0, 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(ffff8000ffff3bb0) at mtx_enter+0x6e sys/kern/kern_lock.c:549 filt_procdetach(fffffd8060c6a180) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff800036908550,fffffd806f5a1678,fffffd806f5a16f0,0,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline] knote_remove(ffff800036908550,fffffd806f5a1678,fffffd806f5a16f0,0,1) at knote_remove+0x22e sys/kern/kern_event.c:2154 kqueue_purge(ffff800036908550,fffffd806f5a1678) at kqueue_purge+0x117 sys/kern/kern_event.c:1890 kqueue_close(fffffd807e4cde88,ffff800036908550) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd807e4cde88,ffff800036908550) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd807e4cde88,ffff800036908550) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff800036908550) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff800036908550,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800036908550,ffff80002cceba80,ffff80002cceb9d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002cceba80) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002cceba80) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7bc739467cf0, 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(0xffffffff83967770, 0xffff8000ffff3bb0, 0, 1) -> e ddb> trace mtx_enter(ffff8000ffff3bb0) at mtx_enter+0x6e sys/kern/kern_lock.c:549 filt_procdetach(fffffd8060c6a180) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff800036908550,fffffd806f5a1678,fffffd806f5a16f0,0,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline] knote_remove(ffff800036908550,fffffd806f5a1678,fffffd806f5a16f0,0,1) at knote_remove+0x22e sys/kern/kern_event.c:2154 kqueue_purge(ffff800036908550,fffffd806f5a1678) at kqueue_purge+0x117 sys/kern/kern_event.c:1890 kqueue_close(fffffd807e4cde88,ffff800036908550) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd807e4cde88,ffff800036908550) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd807e4cde88,ffff800036908550) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff800036908550) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff800036908550,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800036908550,ffff80002cceba80,ffff80002cceb9d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002cceba80) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002cceba80) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7bc739467cf0, count: -12 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002cceb690 rbx 0xfffffd8060c6a100 rdx 0 rcx 0 rax 0xffff800036908500 r8 0x1 r9 0 r10 0x2014f79ee57a68bc r11 0xc928d31c26a37e05 r12 0x1b r13 0xffff8000ffff3ad0 r14 0xffff8000ffff3bb0 r15 0 rip 0xffffffff82bc5cbe mtx_enter+0x6e cs 0x8 rflags 0x10297 __ALIGN_SIZE+0xf297 rsp 0xffff80002cceb660 ss 0x10 mtx_enter+0x6e: movq 0(%r14),%r15 ddb> show proc PROC (syz-executor) tid=253708 pid=5222 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=55, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff800036908550 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff800036909ca8,0xffff800036909258 process=0xffff800036905218 user=0xffff80002cce6000, vmspace=0xfffffd806ca468b8 estcpu=5, cpticks=5, pctcpu=0.3, user=0, sys=2, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 67179 429018 0 0 3 0x14280 nfsidl nfsio 76181 259430 0 0 3 0x14280 nfsidl nfsio 71756 297811 0 0 3 0x14280 nfsidl nfsio 28493 219423 0 0 3 0x14280 nfsidl nfsio 87971 284734 0 0 3 0x14280 nfsidl nfsio 40954 375132 0 0 3 0x14280 nfsidl nfsio 91306 94208 0 0 3 0x14280 nfsidl nfsio 73783 489140 0 0 3 0x14280 nfsidl nfsio 13843 474253 0 0 3 0x14280 nfsidl nfsio 63296 434549 0 0 3 0x14280 nfsidl nfsio 4790 497621 0 0 3 0x14280 nfsidl nfsio 20836 491257 0 0 3 0x14280 nfsidl nfsio 1420 57039 0 0 3 0x14280 nfsidl nfsio 34661 368722 0 0 3 0x14280 nfsidl nfsio 50961 131223 0 0 3 0x14280 nfsidl nfsio 30401 435900 0 0 3 0x14280 nfsidl nfsio 921 41389 0 0 3 0x14280 nfsidl nfsio 85269 86002 0 0 3 0x14280 nfsidl nfsio 99320 391119 0 0 3 0x14280 nfsidl nfsio 52644 413954 0 0 3 0x14280 nfsidl nfsio 53718 82282 538 0 2 0 syz-executor 53718 443042 538 0 3 0x4000080 fsleep syz-executor 22692 7769 23263 0 2 0 syz-executor 22692 26000 23263 0 3 0x4000080 fsleep syz-executor 33745 238072 7825 0 2 0 syz-executor 33745 373182 7825 0 3 0x4000080 kqread syz-executor 33745 139751 7825 0 2 0x4000000 syz-executor 84887 423942 99187 0 2 0 syz-executor 84887 458927 99187 0 3 0x4000080 fsleep syz-executor 63847 14619 95470 -1 2 0x10 syz-executor 63847 452597 95470 -1 3 0x4000090 fsleep syz-executor 42995 427570 42952 0 2 0 syz-executor 42995 365576 42952 0 3 0x4000080 fsleep syz-executor 99187 442989 31922 0 2 0xc82 syz-executor 77813 226087 31922 0 3 0x82 nanoslp syz-executor 23263 391356 31922 0 3 0x82 nanoslp syz-executor 538 365687 31922 0 3 0x82 nanoslp syz-executor 7825 201917 31922 0 2 0xc82 syz-executor 95470 518501 31922 0 2 0xc82 syz-executor 42952 509180 31922 0 3 0x82 nanoslp syz-executor 71735 208530 31922 0 3 0x82 nanoslp syz-executor 31922 106879 28860 0 3 0x82 kqread syz-executor 28860 291174 18315 0 3 0x10008a sigsusp ksh 18315 209785 50378 0 3 0x98 kqread sshd-session 50378 116353 88632 0 3 0x92 kqread sshd-session 68698 433857 1 0 3 0x100083 ttyin getty 88632 114312 1 0 3 0x88 kqread sshd 35537 44035 58475 73 2 0x1100010 syslogd 58475 204015 1 0 3 0x100082 sbwait syslogd 89585 257981 1 0 3 0x100080 kqread resolvd 29261 43860 54426 77 3 0x100092 kqread dhcpleased 63999 125544 54426 77 3 0x100092 kqread dhcpleased 54426 507580 1 0 3 0x80 kqread dhcpleased 31370 303385 0 0 3 0x14200 bored smr 89000 250673 0 0 2 0x14200 zerothread 83084 422483 0 0 3 0x14200 aiodoned aiodoned 61539 427025 0 0 3 0x14200 syncer update 79752 69218 0 0 3 0x14200 cleaner cleaner 34577 385598 0 0 3 0x14200 reaper reaper 14420 521412 0 0 3 0x14200 pgdaemon pagedaemon 74478 419547 0 0 3 0x14200 bored viomb 15159 395425 0 0 3 0x40014200 acpi0 acpi0 93843 334215 0 0 3 0x14200 bored softnet0 99752 298852 0 0 3 0x14200 bored systqmp 88006 35552 0 0 3 0x14200 bored systq 11149 103331 0 0 3 0x40014200 tmoslp softclock 90295 95240 0 0 3 0x40014200 idle0 1 511712 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 10178 11124K 11335K 166960K 11513 0 pcb 18 14K 16K 166960K 112 0 rtable 247 7K 7K 166960K 382 0 pf 31 13K 17K 166960K 37 0 ifaddr 42 7K 7K 166960K 45 0 ifgroup 50 2K 2K 166960K 52 0 sysctl 1 1K 9K 166960K 5 0 counters 33 17K 17K 166960K 34 0 ioctlops 0 0K 4K 166960K 40 0 iov 0 0K 12K 166960K 6 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1408 89K 89K 166960K 1540 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 5 0K 0K 166960K 38 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 97K 166960K 223 0 sigio 0 0K 0K 166960K 3 0 proc 59 59K 108K 166960K 479 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 12 0 in_multi 99 7K 7K 166960K 103 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 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 363 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 233 152K 167K 166960K 3712 0 UVM aobj 5 6K 6K 166960K 5 0 pinsyscall 39 78K 96K 166960K 1291 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 6 0 NDP 11 0K 2K 166960K 28 0 temp 36 8660K 8724K 166960K 4249 0 kqueue 18 28K 31K 166960K 37 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 42 0 39 1 0 1 1 0 8 0 rtentry 136 118 0 6 4 0 4 4 0 8 0 unpcb 144 84 0 68 1 0 1 1 0 8 0 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 28 0 21 1 0 1 1 0 8 0 arp 96 19 0 1 1 0 1 1 0 8 0 inpcb 328 246 0 235 7 0 7 7 0 8 6 nd6 112 25 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 1 0 1 1 0 1 1 0 8 1 pfrule 1344 1 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 488 0 2 31 0 31 31 0 8 0 art_table 40 489 0 2 5 0 5 5 0 8 0 art_node 32 116 0 15 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semapl 112 36 0 33 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1718 0 214 95 0 95 95 0 8 0 ffsino 256 1718 0 214 95 0 95 95 0 8 0 nchpl 144 2029 0 340 63 0 63 63 0 8 0 vnodes 216 1948 0 0 109 0 109 109 0 8 0 namei 1024 6427 0 6427 2 0 2 2 0 8 2 vcpupl 3904 1 0 0 1 0 1 1 0 8 0 vmpool 800 1 0 0 1 0 1 1 0 8 0 kstatmem 264 24 0 2 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 6471 0 6471 2 0 2 2 1 8 2 plimitpl 152 105 0 89 1 0 1 1 0 8 0 sigapl 424 808 0 745 39 10 29 39 0 8 22 knotepl 120 5973 0 5411 18 0 18 18 0 8 0 kqueuepl 184 42 0 28 1 0 1 1 0 8 0 pipepl 304 118 0 91 3 0 3 3 0 8 0 fdescpl 448 495 0 465 5 0 5 5 0 8 1 filepl 120 2260 0 2038 11 0 11 11 0 8 3 lockfpl 104 95 0 91 1 0 1 1 0 8 0 lockfspl 48 49 0 45 1 0 1 1 0 8 0 sessionpl 144 23 0 15 1 0 1 1 0 8 0 pgrppl 48 31 0 15 1 0 1 1 0 8 0 ucredpl 104 238 0 226 1 0 1 1 0 8 0 zombiepl 144 747 0 745 1 0 1 1 0 8 0 processpl 1152 808 0 745 25 6 19 25 0 8 14 procpl 664 940 0 870 30 7 23 30 0 8 17 sockpl 552 375 0 345 7 0 7 7 0 8 4 mcl64k 65536 69 0 69 1 0 1 1 0 8 1 mcl16k 16384 2 0 2 1 0 1 1 0 8 1 mcl9k 9216 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 4 0 4 1 0 1 1 0 8 1 mcl4k 4096 2568 0 2511 15 0 15 15 0 8 6 mcl2k 2048 314 0 313 4 0 4 4 0 8 3 mtagpl 96 11 0 4 1 0 1 1 0 8 0 mbufpl 256 5094 0 4931 17 0 17 17 0 8 1 bufpl 280 2359 0 120 160 0 160 160 0 8 0 anonpl 24 110361 0 105157 32 0 32 32 0 187 0 amapchunkpl 152 11259 0 10644 35 0 35 35 0 158 11 amappl16 200 2041 0 2013 5 0 5 5 0 8 3 amappl15 192 10 0 10 1 0 1 1 0 8 1 amappl14 184 9 0 9 1 0 1 1 0 8 1 amappl13 176 404 0 403 1 0 1 1 0 8 0 amappl12 168 838 0 799 2 0 2 2 0 8 0 amappl11 160 4 0 4 1 0 1 1 0 8 1 amappl10 152 45 0 35 1 0 1 1 0 8 0 amappl9 144 254 0 253 1 0 1 1 0 8 0 amappl8 136 25 0 23 1 0 1 1 0 8 0 amappl7 128 79 0 78 1 0 1 1 0 8 0 amappl6 120 266 0 255 1 0 1 1 0 8 0 amappl5 112 82 0 75 1 0 1 1 0 8 0 amappl4 104 378 0 355 1 0 1 1 0 8 0 amappl3 96 1803 0 1694 3 0 3 3 0 8 0 amappl2 88 529 0 476 2 0 2 2 0 8 0 amappl1 80 9540 0 9004 13 0 13 13 0 8 0 amappl 88 3005 0 2840 4 0 4 4 0 92 0 uvmvnodes 80 96 0 0 2 0 2 2 0 8 0 dma4096 4096 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 495 0 465 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 495 0 465 1 0 1 1 0 8 0 vmmpekpl 168 6448 0 6396 3 0 3 3 0 8 0 vmmpepl 168 39870 0 38054 85 0 85 85 0 357 6 vmsppl 368 494 0 465 4 0 4 4 0 8 1 rwobjpl 40 14457 0 13525 11 0 11 11 0 8 0 pdppl 4096 998 0 931 96 27 69 82 0 8 2 pvpl 32 247028 0 234820 100 0 100 100 0 265 0 pmappl 216 495 0 465 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 376 0 27 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace mtx_enter(ffff8000ffff3bb0) at mtx_enter+0x6e sys/kern/kern_lock.c:549 filt_procdetach(fffffd8060c6a180) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff800036908550,fffffd806f5a1678,fffffd806f5a16f0,0,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline] knote_remove(ffff800036908550,fffffd806f5a1678,fffffd806f5a16f0,0,1) at knote_remove+0x22e sys/kern/kern_event.c:2154 kqueue_purge(ffff800036908550,fffffd806f5a1678) at kqueue_purge+0x117 sys/kern/kern_event.c:1890 kqueue_close(fffffd807e4cde88,ffff800036908550) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd807e4cde88,ffff800036908550) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd807e4cde88,ffff800036908550) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff800036908550) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff800036908550,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800036908550,ffff80002cceba80,ffff80002cceb9d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002cceba80) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002cceba80) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7bc739467cf0, count: -12 ddb> machine ddbcpu 1 No such command ddb> trace mtx_enter(ffff8000ffff3bb0) at mtx_enter+0x6e sys/kern/kern_lock.c:549 filt_procdetach(fffffd8060c6a180) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff800036908550,fffffd806f5a1678,fffffd806f5a16f0,0,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline] knote_remove(ffff800036908550,fffffd806f5a1678,fffffd806f5a16f0,0,1) at knote_remove+0x22e sys/kern/kern_event.c:2154 kqueue_purge(ffff800036908550,fffffd806f5a1678) at kqueue_purge+0x117 sys/kern/kern_event.c:1890 kqueue_close(fffffd807e4cde88,ffff800036908550) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd807e4cde88,ffff800036908550) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd807e4cde88,ffff800036908550) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff800036908550) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff800036908550,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800036908550,ffff80002cceba80,ffff80002cceb9d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002cceba80) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002cceba80) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7bc739467cf0, count: -12