uvm_fault(0xffffffff838b1b88, 0xffff8000ffff6088, 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(ffff8000ffff6088) at mtx_enter+0x6e sys/kern/kern_lock.c:549 filt_procdetach(fffffd80730dd1f0) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff80003c93ba10,fffffd806f51e000,fffffd806f51e078,1,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline] knote_remove(ffff80003c93ba10,fffffd806f51e000,fffffd806f51e078,1,1) at knote_remove+0x22e sys/kern/kern_event.c:2154 kqueue_purge(ffff80003c93ba10,fffffd806f51e000) at kqueue_purge+0x117 sys/kern/kern_event.c:1890 kqueue_close(fffffd805e7a3e90,ffff80003c93ba10) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd805e7a3e90,ffff80003c93ba10) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805e7a3e90,ffff80003c93ba10) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c93ba10) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80003c93ba10,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c93ba10,ffff800038109ae0,ffff800038109a30) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800038109ae0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800038109ae0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70e3ebb4e310, 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(0xffffffff838b1b88, 0xffff8000ffff6088, 0, 1) -> e ddb> trace mtx_enter(ffff8000ffff6088) at mtx_enter+0x6e sys/kern/kern_lock.c:549 filt_procdetach(fffffd80730dd1f0) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff80003c93ba10,fffffd806f51e000,fffffd806f51e078,1,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline] knote_remove(ffff80003c93ba10,fffffd806f51e000,fffffd806f51e078,1,1) at knote_remove+0x22e sys/kern/kern_event.c:2154 kqueue_purge(ffff80003c93ba10,fffffd806f51e000) at kqueue_purge+0x117 sys/kern/kern_event.c:1890 kqueue_close(fffffd805e7a3e90,ffff80003c93ba10) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd805e7a3e90,ffff80003c93ba10) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805e7a3e90,ffff80003c93ba10) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c93ba10) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80003c93ba10,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c93ba10,ffff800038109ae0,ffff800038109a30) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800038109ae0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800038109ae0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70e3ebb4e310, count: -12 ddb> show registers rdi 0 rsi 0 rbp 0xffff8000381096f0 rbx 0xfffffd80730dd100 rdx 0 rcx 0x1 rax 0xffff80003c93ba00 r8 0x1 r9 0 r10 0x6fd1eac4080b587d r11 0x1ebf485a8965b998 r12 0x1b r13 0xffff8000ffff5fa8 r14 0xffff8000ffff6088 r15 0 rip 0xffffffff82a4890e mtx_enter+0x6e cs 0x8 rflags 0x10297 __ALIGN_SIZE+0xf297 rsp 0xffff8000381096c0 ss 0x10 mtx_enter+0x6e: movq 0(%r14),%r15 ddb> show proc PROC (syz-executor) tid=126065 pid=37728 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c93ba10 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002fcf0d10,0xffff80003c93ad28 process=0xffff8000ffffba98 user=0xffff800038104000, vmspace=0xfffffd806d22bd00 estcpu=0, cpticks=4, pctcpu=0.2, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 14663 364851 36419 0 2 0 syz-executor 14663 435088 36419 0 3 0x4000080 dtread syz-executor 14663 256649 36419 0 2 0x4000000 syz-executor 95422 479740 1 0 3 0x100083 ttyin getty 95269 232737 72502 0 3 0x3000 suspend syz-executor 95269 187266 72502 0 2 0x4081000 syz-executor 95269 374747 72502 0 2 0x4081000 syz-executor 30399 513716 59098 0 3 0x80 nanoslp syz-executor 30399 141908 59098 0 2 0x4000000 syz-executor 65606 130423 0 0 3 0x14200 acct acct 14064 498098 26166 0 3 0x3000 suspend syz-executor 14064 248350 26166 0 2 0x4081000 syz-executor 73309 403701 64765 0 3 0x82 nanoslp syz-executor 26166 185995 64765 0 3 0x82 wait syz-executor 57690 158991 64765 0 3 0x82 nanoslp syz-executor 36419 333388 64765 0 3 0x82 nanoslp syz-executor 96747 9783 64765 0 2 0x2 syz-executor 25827 223826 64765 0 3 0x82 wait syz-executor 72502 377663 64765 0 3 0x82 nanoslp syz-executor 59098 438114 64765 0 3 0x82 nanoslp syz-executor 64765 13685 26585 0 3 0x82 kqread syz-executor 26585 215935 57948 0 3 0x10008a sigsusp ksh 57948 397564 228 0 3 0x98 kqread sshd-session 228 476886 4497 0 3 0x92 kqread sshd-session 4497 523360 1 0 3 0x88 kqread sshd 66201 122710 19938 73 2 0x1100010 syslogd 19938 389242 1 0 3 0x100082 sbwait syslogd 13413 234371 1 0 3 0x100080 kqread resolvd 77605 185805 75477 77 3 0x100092 kqread dhcpleased 74359 339802 75477 77 3 0x100092 kqread dhcpleased 75477 455237 1 0 3 0x80 kqread dhcpleased 80703 294197 0 0 3 0x14200 bored smr 3270 340316 0 0 2 0x14200 zerothread 52295 47246 0 0 3 0x14200 aiodoned aiodoned 25116 129273 0 0 3 0x14200 syncer update 17893 328156 0 0 3 0x14200 cleaner cleaner 48524 511404 0 0 3 0x14200 reaper reaper 49337 148136 0 0 3 0x14200 pgdaemon pagedaemon 34194 222325 0 0 3 0x14200 bored viomb 5466 123967 0 0 3 0x40014200 acpi0 acpi0 16913 172876 0 0 2 0x14200 softnet0 46411 433913 0 0 3 0x14200 bored systqmp 36631 459248 0 0 3 0x14200 bored systq 7493 361460 0 0 3 0x40014200 tmoslp softclock 76221 358192 0 0 3 0x40014200 idle0 1 195837 0 0 3 0x80082 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 11044 12147K 12328K 166960K 12300 0 pcb 18 12K 12K 166960K 34 0 rtable 245 7K 7K 166960K 377 0 pf 33 13K 13K 166960K 33 0 ifaddr 43 7K 7K 166960K 45 0 ifgroup 55 2K 2K 166960K 55 0 sysctl 1 1K 9K 166960K 6 0 counters 34 17K 17K 166960K 34 0 ioctlops 0 0K 2K 166960K 38 0 iov 0 0K 12K 166960K 2 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1347 85K 85K 166960K 1399 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 5 0K 0K 166960K 73 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 179 0 sigio 0 0K 0K 166960K 1 0 proc 60 59K 124K 166960K 485 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 1 0K 0K 166960K 13 0 in_multi 99 7K 7K 166960K 106 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 431 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 237 151K 160K 166960K 3288 0 UVM aobj 3 2K 2K 166960K 4 0 pinsyscall 38 76K 96K 166960K 1266 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 4 0 NDP 12 0K 2K 166960K 28 0 temp 38 8662K 8726K 166960K 4092 0 kqueue 16 24K 24K 166960K 29 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 43 0 40 1 0 1 1 0 8 0 rtentry 136 114 0 3 4 0 4 4 0 8 0 unpcb 144 54 0 39 1 0 1 1 0 8 0 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 26 0 22 1 0 1 1 0 8 0 arp 96 18 0 0 1 0 1 1 0 8 0 inpcb 328 105 0 95 2 0 2 2 0 8 0 nd6 112 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 483 0 31 31 0 31 31 0 8 2 art_table 40 485 0 31 5 0 5 5 0 8 0 art_node 32 113 0 12 1 0 1 1 0 8 0 semapl 112 69 0 66 1 0 1 1 0 8 0 shmpl 112 1 0 1 1 0 1 1 0 8 1 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1645 0 136 95 0 95 95 0 8 0 ffsino 256 1645 0 136 95 0 95 95 0 8 0 nchpl 144 1898 0 204 63 0 63 63 0 8 0 vnodes 216 1750 0 0 98 0 98 98 0 8 0 namei 1024 5915 0 5915 2 0 2 2 0 8 2 kstatmem 264 24 0 0 2 0 2 2 0 8 0 scxspl 216 6484 0 6484 2 0 2 2 1 8 2 plimitpl 152 65 0 49 1 0 1 1 0 8 0 sigapl 424 731 0 688 34 7 27 34 0 8 21 knotepl 120 4861 0 4559 10 0 10 10 0 8 0 kqueuepl 184 64 0 21 3 0 3 3 0 8 0 pipepl 304 183 0 154 3 0 3 3 0 8 0 fdescpl 448 457 0 428 5 0 5 5 0 8 1 filepl 120 2020 0 1760 11 0 11 11 0 8 0 lockfpl 104 31 0 27 1 0 1 1 0 8 0 lockfspl 48 15 0 11 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 104 130 0 117 1 0 1 1 0 8 0 zombiepl 144 693 0 688 1 0 1 1 0 8 0 processpl 1152 731 0 688 22 4 18 22 0 8 14 procpl 664 811 0 762 27 5 22 27 0 8 17 sockpl 552 202 0 173 3 0 3 3 0 8 0 mcl64k 65536 8 0 7 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 5 0 5 1 0 1 1 0 8 1 mcl4k 4096 2520 0 2463 16 1 15 16 0 8 7 mcl2k 2048 258 0 255 1 0 1 1 0 8 0 mtagpl 96 6 0 4 1 0 1 1 0 8 0 mbufpl 256 4681 0 4518 11 0 11 11 0 8 0 bufpl 280 2445 0 119 167 0 167 167 0 8 0 anonpl 24 69260 0 65403 44 0 44 44 0 187 19 amapchunkpl 152 8807 0 8309 30 0 30 30 0 158 9 amappl16 200 498 0 430 14 4 10 14 0 8 6 amappl15 192 1 0 1 1 0 1 1 0 8 1 amappl14 184 2 0 2 1 0 1 1 0 8 1 amappl13 176 418 0 416 1 0 1 1 0 8 0 amappl12 168 804 0 766 2 0 2 2 0 8 0 amappl11 160 2 0 2 1 0 1 1 0 8 1 amappl10 152 43 0 33 1 0 1 1 0 8 0 amappl9 144 274 0 274 1 0 1 1 0 8 1 amappl8 136 19 0 18 1 0 1 1 0 8 0 amappl7 128 75 0 73 1 0 1 1 0 8 0 amappl6 120 257 0 246 1 0 1 1 0 8 0 amappl5 112 64 0 57 1 0 1 1 0 8 0 amappl4 104 379 0 354 1 0 1 1 0 8 0 amappl3 96 1599 0 1491 3 0 3 3 0 8 0 amappl2 88 531 0 476 2 0 2 2 0 8 0 amappl1 80 9267 0 8724 13 0 13 13 0 8 0 amappl 88 2560 0 2393 4 0 4 4 0 92 0 uvmvnodes 80 101 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 2 0 1 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 3 0 1 1 0 1 1 0 8 0 uaddrrnd 24 457 0 428 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 457 0 428 1 0 1 1 0 8 0 vmmpekpl 168 6289 0 6227 3 0 3 3 0 8 0 vmmpepl 168 36306 0 34460 90 0 90 90 0 357 6 vmsppl 368 456 0 428 4 0 4 4 0 8 1 rwobjpl 40 12322 0 11327 12 0 12 12 0 8 1 pdppl 4096 920 0 856 96 30 66 82 0 8 2 pvpl 32 198932 0 188525 119 0 119 119 0 265 30 pmappl 216 456 0 428 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 369 0 31 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace mtx_enter(ffff8000ffff6088) at mtx_enter+0x6e sys/kern/kern_lock.c:549 filt_procdetach(fffffd80730dd1f0) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff80003c93ba10,fffffd806f51e000,fffffd806f51e078,1,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline] knote_remove(ffff80003c93ba10,fffffd806f51e000,fffffd806f51e078,1,1) at knote_remove+0x22e sys/kern/kern_event.c:2154 kqueue_purge(ffff80003c93ba10,fffffd806f51e000) at kqueue_purge+0x117 sys/kern/kern_event.c:1890 kqueue_close(fffffd805e7a3e90,ffff80003c93ba10) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd805e7a3e90,ffff80003c93ba10) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805e7a3e90,ffff80003c93ba10) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c93ba10) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80003c93ba10,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c93ba10,ffff800038109ae0,ffff800038109a30) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800038109ae0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800038109ae0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70e3ebb4e310, count: -12 ddb> machine ddbcpu 1 No such command ddb> trace mtx_enter(ffff8000ffff6088) at mtx_enter+0x6e sys/kern/kern_lock.c:549 filt_procdetach(fffffd80730dd1f0) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff80003c93ba10,fffffd806f51e000,fffffd806f51e078,1,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline] knote_remove(ffff80003c93ba10,fffffd806f51e000,fffffd806f51e078,1,1) at knote_remove+0x22e sys/kern/kern_event.c:2154 kqueue_purge(ffff80003c93ba10,fffffd806f51e000) at kqueue_purge+0x117 sys/kern/kern_event.c:1890 kqueue_close(fffffd805e7a3e90,ffff80003c93ba10) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd805e7a3e90,ffff80003c93ba10) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd805e7a3e90,ffff80003c93ba10) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c93ba10) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80003c93ba10,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c93ba10,ffff800038109ae0,ffff800038109a30) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800038109ae0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800038109ae0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70e3ebb4e310, count: -12