uvm_fault(0xffffffff838be2b8, 0xffff8000ffff0108, 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(ffff8000ffff0108) at mtx_enter+0x6e sys/kern/kern_lock.c:549 filt_procdetach(fffffd80688dbbd0) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff80002a7bc018,fffffd8079db4508,fffffd8079db4580,7,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline] knote_remove(ffff80002a7bc018,fffffd8079db4508,fffffd8079db4580,7,1) at knote_remove+0x22e sys/kern/kern_event.c:2154 kqueue_purge(ffff80002a7bc018,fffffd8079db4508) at kqueue_purge+0x117 sys/kern/kern_event.c:1890 kqueue_close(fffffd8069ca5270,ffff80002a7bc018) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd8069ca5270,ffff80002a7bc018) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8069ca5270,ffff80002a7bc018) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a7bc018) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80002a7bc018,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a7bc018,ffff8000314f7460,ffff8000314f73b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000314f7460) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000314f7460) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74e471587fe0, 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(0xffffffff838be2b8, 0xffff8000ffff0108, 0, 1) -> e ddb> trace mtx_enter(ffff8000ffff0108) at mtx_enter+0x6e sys/kern/kern_lock.c:549 filt_procdetach(fffffd80688dbbd0) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff80002a7bc018,fffffd8079db4508,fffffd8079db4580,7,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline] knote_remove(ffff80002a7bc018,fffffd8079db4508,fffffd8079db4580,7,1) at knote_remove+0x22e sys/kern/kern_event.c:2154 kqueue_purge(ffff80002a7bc018,fffffd8079db4508) at kqueue_purge+0x117 sys/kern/kern_event.c:1890 kqueue_close(fffffd8069ca5270,ffff80002a7bc018) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd8069ca5270,ffff80002a7bc018) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8069ca5270,ffff80002a7bc018) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a7bc018) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80002a7bc018,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a7bc018,ffff8000314f7460,ffff8000314f73b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000314f7460) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000314f7460) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74e471587fe0, count: -12 ddb> show registers rdi 0 rsi 0 rbp 0xffff8000314f7070 rbx 0xfffffd80688dbb00 rdx 0 rcx 0x7 rax 0xffff80002a7bc000 r8 0x1 r9 0 r10 0xd7b4dd897c6f79f1 r11 0xaa68de02496198a8 r12 0x1b r13 0xffff8000ffff0028 r14 0xffff8000ffff0108 r15 0 rip 0xffffffff82b3349e mtx_enter+0x6e cs 0x8 rflags 0x10297 __ALIGN_SIZE+0xf297 rsp 0xffff8000314f7040 ss 0x10 mtx_enter+0x6e: movq 0(%r14),%r15 ddb> show proc PROC (syz-executor) tid=516371 pid=65148 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a7bc018 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a7bdca0,0xffff80003c9f1cc8 process=0xffff8000ffffba98 user=0xffff8000314f2000, vmspace=0xfffffd806c995180 estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 59157 211909 78005 0 2 0 syz-executor 59157 218508 78005 0 2 0x4000000 syz-executor 63012 250670 20651 0 3 0x3000 suspend syz-executor 63012 146239 20651 0 2 0x4081000 syz-executor 63012 452150 20651 0 2 0x4081000 syz-executor 63012 95820 20651 0 2 0x4081000 syz-executor 63012 321204 20651 0 2 0x4081000 syz-executor 5929 117399 94554 -1 2 0x10 syz-executor 5929 328711 94554 -1 3 0x4000090 fsleep syz-executor 39096 36913 97208 0 3 0x80 nanoslp syz-executor 39096 438843 97208 0 3 0x4000080 kqsel syz-executor 39096 186281 97208 0 3 0x4000080 kqsel syz-executor 39096 329646 97208 0 3 0x4000080 fsleep syz-executor 14397 289076 0 0 3 0x14280 nfsidl nfsio 10157 396227 0 0 3 0x14280 nfsidl nfsio 59161 461748 0 0 3 0x14280 nfsidl nfsio 81194 104388 0 0 3 0x14280 nfsidl nfsio 51612 187356 946 0 3 0x400080 nanoslp syz-executor 51612 8565 946 0 3 0x4400080 msgwait syz-executor 51612 431312 946 0 3 0x4400080 fsleep syz-executor 12893 225540 34200 0 3 0x80 nanoslp syz-executor 12893 53996 34200 0 3 0x4000080 semwait syz-executor 12893 182726 34200 0 3 0x4000080 pipewr syz-executor 12893 209942 34200 0 3 0x4000080 fsleep syz-executor 48785 351413 60434 0 3 0x82 nanoslp syz-executor 94554 489674 60434 0 3 0x82 nanoslp syz-executor 34200 345460 60434 0 3 0x82 nanoslp syz-executor 20651 164551 60434 0 3 0x82 nanoslp syz-executor 97208 419482 60434 0 3 0x82 nanoslp syz-executor 78005 238795 60434 0 3 0x82 nanoslp syz-executor 45700 32255 60434 0 3 0x82 nanoslp syz-executor 946 256665 60434 0 3 0x82 nanoslp syz-executor 60434 404176 34190 0 3 0x82 kqread syz-executor 34190 275898 25496 0 3 0x10008a sigsusp ksh 25496 243015 92964 0 3 0x98 kqread sshd-session 92964 497722 46212 0 3 0x92 kqread sshd-session 99822 210938 1 0 3 0x100083 ttyin getty 46212 164246 1 0 3 0x88 kqread sshd 41285 328633 55744 73 3 0x1100090 kqread syslogd 55744 522614 1 0 3 0x100082 sbwait syslogd 57454 128496 1 0 3 0x100080 kqread resolvd 80688 309474 14140 77 3 0x100092 kqread dhcpleased 7798 431109 14140 77 3 0x100092 kqread dhcpleased 14140 134228 1 0 3 0x80 kqread dhcpleased 38089 405937 0 0 3 0x14200 bored smr 29265 483115 0 0 2 0x14200 zerothread 84106 73459 0 0 3 0x14200 aiodoned aiodoned 93950 360641 0 0 3 0x14200 syncer update 83812 351854 0 0 3 0x14200 cleaner cleaner 4250 331409 0 0 3 0x14200 reaper reaper 25669 249145 0 0 3 0x14200 pgdaemon pagedaemon 28890 274633 0 0 3 0x14200 bored viomb 61125 306661 0 0 3 0x40014200 acpi0 acpi0 66796 88569 0 0 2 0x14200 softnet0 39594 351375 0 0 3 0x14200 bored systqmp 452 511667 0 0 3 0x14200 bored systq 64005 70343 0 0 3 0x40014200 tmoslp softclock 17148 99053 0 0 3 0x40014200 idle0 1 412613 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 11039 12234K 12429K 166960K 12262 0 pcb 19 12K 12K 166960K 31 0 rtable 227 6K 6K 166960K 353 0 pf 32 13K 13K 166960K 39 0 ifaddr 42 7K 7K 166960K 48 0 ifgroup 54 2K 2K 166960K 63 0 sysctl 1 1K 9K 166960K 5 0 counters 34 17K 18K 166960K 37 0 ioctlops 0 0K 2K 166960K 37 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1341 84K 84K 166960K 1395 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 6 0K 0K 166960K 6 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 97K 166960K 178 0 sigio 0 0K 0K 166960K 3 0 proc 58 59K 124K 166960K 478 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 4 0 in_multi 95 7K 7K 166960K 100 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 43 201K 201K 166960K 43 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 241 163K 170K 166960K 3331 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 39 78K 96K 166960K 1246 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 4 0 NDP 12 0K 2K 166960K 31 0 temp 37 8658K 8722K 166960K 3949 0 kqueue 15 22K 25K 166960K 34 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 39 0 36 1 0 1 1 0 8 0 rtentry 136 111 0 6 4 0 4 4 0 8 0 unpcb 144 52 0 37 1 0 1 1 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 19 0 14 1 0 1 1 0 8 0 arp 96 18 0 0 1 0 1 1 0 8 0 inpcb 328 92 0 82 2 1 1 2 0 8 0 nd6 112 24 0 2 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 16 29 0 29 29 0 8 0 art_table 40 453 0 16 5 0 5 5 0 8 0 art_node 32 111 0 15 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 1 0 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 4 0 0 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1636 0 130 95 0 95 95 0 8 0 ffsino 256 1636 0 130 95 0 95 95 0 8 0 nchpl 144 1881 0 192 63 0 63 63 0 8 0 vnodes 216 1736 0 0 97 0 97 97 0 8 0 namei 1024 5500 0 5500 3 2 1 2 0 8 1 kstatmem 264 30 0 6 2 0 2 2 0 8 0 scxspl 216 6109 0 6109 2 1 1 2 1 8 1 plimitpl 152 26 0 10 1 0 1 1 0 8 0 sigapl 424 520 0 473 9 3 6 9 0 8 0 knotepl 120 4295 0 4197 4 0 4 4 0 8 0 kqueuepl 184 67 0 21 3 0 3 3 0 8 0 pipepl 304 116 0 87 3 0 3 3 0 8 0 fdescpl 448 451 0 421 5 1 4 5 0 8 0 filepl 120 1662 0 1411 9 1 8 9 0 8 0 lockfpl 104 25 0 23 1 0 1 1 0 8 0 lockfspl 48 11 0 9 1 0 1 1 0 8 0 sessionpl 144 21 0 13 1 0 1 1 0 8 0 pgrppl 48 30 0 13 1 0 1 1 0 8 0 ucredpl 104 85 0 73 1 0 1 1 0 8 0 zombiepl 144 475 0 473 1 0 1 1 0 8 0 processpl 1152 520 0 473 6 1 5 6 0 8 0 procpl 664 588 0 527 8 1 7 8 0 8 0 sockpl 552 184 0 156 3 0 3 3 0 8 0 mcl64k 65536 4 0 4 1 1 0 1 0 8 0 mcl8k 8192 6 0 6 1 1 0 1 0 8 0 mcl4k 4096 2508 0 2456 14 7 7 14 0 8 0 mcl2k 2048 259 0 258 3 0 3 3 0 8 2 mtagpl 96 7 0 4 1 0 1 1 0 8 0 mbufpl 256 4496 0 4342 13 0 13 13 0 8 0 bufpl 280 2363 0 118 161 0 161 161 0 8 0 anonpl 24 103573 0 99973 32 8 24 32 0 187 0 amapchunkpl 152 9679 0 9183 26 5 21 26 0 158 1 amappl16 200 1950 0 1898 5 1 4 5 0 8 0 amappl15 192 40 0 40 1 1 0 1 0 8 0 amappl14 184 19 0 19 1 1 0 1 0 8 0 amappl13 176 406 0 404 1 0 1 1 0 8 0 amappl12 168 786 0 747 2 0 2 2 0 8 0 amappl11 160 17 0 17 1 1 0 1 0 8 0 amappl10 152 44 0 34 1 0 1 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 23 0 22 1 0 1 1 0 8 0 amappl7 128 84 0 82 1 0 1 1 0 8 0 amappl6 120 260 0 249 1 0 1 1 0 8 0 amappl5 112 70 0 62 1 0 1 1 0 8 0 amappl4 104 374 0 351 1 0 1 1 0 8 0 amappl3 96 1476 0 1385 3 0 3 3 0 8 0 amappl2 88 561 0 491 2 0 2 2 0 8 0 amappl1 80 9009 0 8463 13 1 12 13 0 8 0 amappl 88 2635 0 2465 4 0 4 4 0 92 0 uvmvnodes 80 97 0 0 2 0 2 2 0 8 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 451 0 421 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 451 0 421 1 0 1 1 0 8 0 vmmpekpl 168 5434 0 5402 2 0 2 2 0 8 0 vmmpepl 168 36848 0 34987 83 0 83 83 0 357 1 vmsppl 368 450 0 421 4 1 3 4 0 8 0 rwobjpl 40 13456 0 12494 11 0 11 11 0 8 0 pdppl 4096 909 0 842 99 32 67 83 0 8 0 pvpl 32 229948 0 220854 96 15 81 96 0 265 0 pmappl 216 450 0 421 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 371 0 48 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace mtx_enter(ffff8000ffff0108) at mtx_enter+0x6e sys/kern/kern_lock.c:549 filt_procdetach(fffffd80688dbbd0) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff80002a7bc018,fffffd8079db4508,fffffd8079db4580,7,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline] knote_remove(ffff80002a7bc018,fffffd8079db4508,fffffd8079db4580,7,1) at knote_remove+0x22e sys/kern/kern_event.c:2154 kqueue_purge(ffff80002a7bc018,fffffd8079db4508) at kqueue_purge+0x117 sys/kern/kern_event.c:1890 kqueue_close(fffffd8069ca5270,ffff80002a7bc018) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd8069ca5270,ffff80002a7bc018) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8069ca5270,ffff80002a7bc018) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a7bc018) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80002a7bc018,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a7bc018,ffff8000314f7460,ffff8000314f73b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000314f7460) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000314f7460) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74e471587fe0, count: -12 ddb> machine ddbcpu 1 No such command ddb> trace mtx_enter(ffff8000ffff0108) at mtx_enter+0x6e sys/kern/kern_lock.c:549 filt_procdetach(fffffd80688dbbd0) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff80002a7bc018,fffffd8079db4508,fffffd8079db4580,7,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline] knote_remove(ffff80002a7bc018,fffffd8079db4508,fffffd8079db4580,7,1) at knote_remove+0x22e sys/kern/kern_event.c:2154 kqueue_purge(ffff80002a7bc018,fffffd8079db4508) at kqueue_purge+0x117 sys/kern/kern_event.c:1890 kqueue_close(fffffd8069ca5270,ffff80002a7bc018) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd8069ca5270,ffff80002a7bc018) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8069ca5270,ffff80002a7bc018) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a7bc018) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80002a7bc018,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a7bc018,ffff8000314f7460,ffff8000314f73b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000314f7460) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000314f7460) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74e471587fe0, count: -12