uvm_fault(0xffffffff83983ab8, 0xffff80003ca66e10, 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(ffff80003ca66e10) at mtx_enter+0x6e sys/kern/kern_lock.c:549 filt_procdetach(fffffd8060de5c30) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff80002a7b02b0,fffffd8073604508,fffffd8073604580,2,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline] knote_remove(ffff80002a7b02b0,fffffd8073604508,fffffd8073604580,2,1) at knote_remove+0x22e sys/kern/kern_event.c:2154 kqueue_purge(ffff80002a7b02b0,fffffd8073604508) at kqueue_purge+0x117 sys/kern/kern_event.c:1890 kqueue_close(fffffd8073856618,ffff80002a7b02b0) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd8073856618,ffff80002a7b02b0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8073856618,ffff80002a7b02b0) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a7b02b0) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80002a7b02b0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a7b02b0,ffff80002f4eb090,ffff80002f4eafe0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002f4eb090) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002f4eb090) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6feef57a6a90, 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(0xffffffff83983ab8, 0xffff80003ca66e10, 0, 1) -> e ddb> trace mtx_enter(ffff80003ca66e10) at mtx_enter+0x6e sys/kern/kern_lock.c:549 filt_procdetach(fffffd8060de5c30) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff80002a7b02b0,fffffd8073604508,fffffd8073604580,2,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline] knote_remove(ffff80002a7b02b0,fffffd8073604508,fffffd8073604580,2,1) at knote_remove+0x22e sys/kern/kern_event.c:2154 kqueue_purge(ffff80002a7b02b0,fffffd8073604508) at kqueue_purge+0x117 sys/kern/kern_event.c:1890 kqueue_close(fffffd8073856618,ffff80002a7b02b0) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd8073856618,ffff80002a7b02b0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8073856618,ffff80002a7b02b0) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a7b02b0) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80002a7b02b0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a7b02b0,ffff80002f4eb090,ffff80002f4eafe0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002f4eb090) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002f4eb090) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6feef57a6a90, count: -12 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002f4eaca0 rbx 0xfffffd8060de5c00 rdx 0 rcx 0x2 rax 0xffff80002a7b0200 r8 0x1 r9 0 r10 0xe47986bf1c8137b4 r11 0xddc46336d0431fe3 r12 0x1b r13 0xffff80003ca66d30 r14 0xffff80003ca66e10 r15 0 rip 0xffffffff82215cee mtx_enter+0x6e cs 0x8 rflags 0x10297 __ALIGN_SIZE+0xf297 rsp 0xffff80002f4eac70 ss 0x10 mtx_enter+0x6e: movq 0(%r14),%r15 ddb> show proc PROC (syz-executor) tid=166331 pid=59086 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=67, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a7b02b0 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003c93bca8,0xffff80002a776548 process=0xffff8000ffff8d98 user=0xffff80002f4e6000, vmspace=0xfffffd80609ed748 estcpu=17, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 53509 97798 44980 0 2 0 syz-executor 45545 387818 14026 0 2 0 syz-executor 45545 237429 14026 0 3 0x4000080 fsleep syz-executor 51654 394112 96492 0 2 0 syz-executor 65466 192607 83634 0 2 0 syz-executor 65466 373823 83634 0 3 0x4000080 fsleep syz-executor 39101 170423 42821 0 3 0x80 nanoslp syz-executor 39101 315514 42821 0 3 0x4000080 sbwait syz-executor 39101 431317 42821 0 3 0x4000000 inode syz-executor 39101 257360 42821 0 3 0x4000080 fsleep syz-executor 88420 78148 62457 0 2 0x1000000 syz-executor 88420 491071 62457 0 3 0x5000080 fsleep syz-executor 88420 443368 62457 0 3 0x5000080 fsleep syz-executor 88420 56180 62457 0 3 0x5000080 fsleep syz-executor 39252 59191 0 0 3 0x14280 nfsidl nfsio 58971 474369 0 0 3 0x14280 nfsidl nfsio 92772 435141 0 0 3 0x14280 nfsidl nfsio 16957 480841 0 0 3 0x14280 nfsidl nfsio 82593 293043 1 0 3 0x100083 ttyin getty 97081 6248 0 0 3 0x14200 acct acct 96492 142420 82612 0 2 0xc82 syz-executor 62457 296471 82612 0 3 0x82 nanoslp syz-executor 83634 163636 82612 0 2 0xc82 syz-executor 71268 300530 82612 0 3 0x82 nanoslp syz-executor 14026 390669 82612 0 2 0xc82 syz-executor 42821 462446 82612 0 3 0x82 nanoslp syz-executor 44980 314647 82612 0 2 0xc82 syz-executor 27969 334181 82612 0 2 0x10000082 syz-executor 82612 134790 77684 0 3 0x82 kqread syz-executor 77684 388727 54180 0 3 0x10008a sigsusp ksh 54180 192500 75948 0 3 0x98 kqread sshd-session 75948 8964 45181 0 3 0x92 kqread sshd-session 45181 205209 1 0 3 0x88 kqread sshd 30106 519739 9556 73 2 0x1100010 syslogd 9556 328303 1 0 3 0x100082 sbwait syslogd 5032 12920 1 0 3 0x100080 kqread resolvd 23197 222603 25043 77 3 0x100092 kqread dhcpleased 85961 4986 25043 77 3 0x100092 kqread dhcpleased 25043 215978 1 0 3 0x80 kqread dhcpleased 7593 10731 0 0 3 0x14200 bored smr 79034 119171 0 0 2 0x14200 zerothread 45789 475052 0 0 3 0x14200 aiodoned aiodoned 75601 235033 0 0 3 0x14200 syncer update 81671 22853 0 0 3 0x14200 cleaner cleaner 59820 465958 0 0 3 0x14200 reaper reaper 68291 144029 0 0 3 0x14200 pgdaemon pagedaemon 93004 216797 0 0 3 0x14200 bored viomb 12045 1416 0 0 3 0x40014200 acpi0 acpi0 28290 404879 0 0 3 0x14200 bored softnet0 47351 181960 0 0 3 0x14200 bored systqmp 14679 466477 0 0 3 0x14200 bored systq 31661 458132 0 0 2 0x40014200 softclock 38813 424678 0 0 3 0x40014200 idle0 1 41493 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 11034 12168K 12522K 166960K 12323 0 pcb 17 16K 17K 166960K 121 0 rtable 241 7K 7K 166960K 371 0 pf 30 12K 14K 166960K 47 0 ifaddr 42 7K 7K 166960K 52 0 ifgroup 47 1K 2K 166960K 63 0 sysctl 1 1K 9K 166960K 5 0 counters 33 17K 18K 166960K 39 0 ioctlops 0 0K 4K 166960K 57 0 iov 0 0K 16K 166960K 13 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1409 89K 89K 166960K 1535 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 3 0K 0K 166960K 4 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 243 0 proc 60 59K 108K 166960K 502 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 16 0 in_multi 99 7K 7K 166960K 103 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 5 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 365 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 218 150K 165K 166960K 3977 0 UVM aobj 7 6K 6K 166960K 9 0 pinsyscall 38 76K 96K 166960K 1315 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 2 0 NDP 11 0K 1K 166960K 32 0 temp 40 8663K 8729K 166960K 4359 0 kqueue 15 22K 29K 166960K 47 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 120 105 0 102 3 0 3 3 0 8 2 rtentry 136 116 0 5 4 0 4 4 0 8 0 unpcb 144 100 0 80 2 0 2 2 0 8 1 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 94 0 89 7 0 7 7 0 8 6 arp 96 18 0 0 1 0 1 1 0 8 0 ipq 40 2 0 2 1 0 1 1 0 8 1 ipqe 40 5 0 5 1 0 1 1 0 8 1 inpcb 328 306 0 298 7 0 7 7 0 8 6 nd6 112 25 0 0 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 5 0 5 1 0 1 1 0 8 1 pppxif 1384 1 0 1 1 0 1 1 0 8 1 pfrktable 1344 2 0 2 1 0 1 1 0 8 1 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 4 0 2 1 0 1 1 0 8 0 pfstate 384 2 0 1 1 0 1 1 0 8 0 pfrule 1360 1 0 1 1 0 1 1 0 8 1 rttmr 136 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 497 0 43 31 0 31 31 0 8 2 art_table 40 498 0 43 5 0 5 5 0 8 0 art_node 32 116 0 15 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semapl 112 2 0 1 1 0 1 1 0 8 0 shmpl 112 3 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1765 0 258 95 0 95 95 0 8 0 ffsino 256 1765 0 258 95 0 95 95 0 8 0 nchpl 144 2111 0 422 64 0 64 64 0 8 0 vnodes 216 1978 0 0 110 0 110 110 0 8 0 namei 1024 6142 0 6141 2 0 2 2 0 8 1 vcpupl 3904 2 0 0 1 0 1 1 0 8 0 vmpool 808 3 0 1 1 0 1 1 0 8 0 kstatmem 264 32 0 10 2 0 2 2 0 8 0 scxspl 216 6795 0 6795 3 0 3 3 1 8 3 plimitpl 152 46 0 29 1 0 1 1 0 8 0 sigapl 424 731 0 683 28 3 25 28 0 8 18 knotepl 120 7962 0 7723 14 0 14 14 0 8 6 kqueuepl 184 62 0 52 1 0 1 1 0 8 0 pipepl 304 150 0 123 5 0 5 5 0 8 2 fdescpl 448 517 0 488 5 0 5 5 0 8 1 filepl 120 2314 0 2098 11 0 11 11 0 8 3 lockfpl 104 28 0 26 1 0 1 1 0 8 0 lockfspl 48 15 0 13 1 0 1 1 0 8 0 sessionpl 144 22 0 14 1 0 1 1 0 8 0 pgrppl 48 31 0 15 1 0 1 1 0 8 0 ucredpl 104 168 0 156 1 0 1 1 0 8 0 zombiepl 144 685 0 683 1 0 1 1 0 8 0 processpl 1152 731 0 683 18 2 16 18 0 8 11 procpl 664 905 0 849 22 3 19 22 0 8 12 sockpl 552 522 0 491 8 0 8 8 0 8 5 mcl64k 65536 42 0 42 1 0 1 1 0 8 1 mcl8k 8192 5 0 5 1 0 1 1 0 8 1 mcl4k 4096 2586 0 2529 15 0 15 15 0 8 7 mcl2k 2048 247 0 245 1 0 1 1 0 8 0 mtagpl 96 5 0 4 1 0 1 1 0 8 0 mbufpl 256 5187 0 5008 20 0 20 20 0 8 7 bufpl 280 2375 0 118 162 0 162 162 0 8 0 anonpl 24 93019 0 90011 23 0 23 23 0 187 2 amapchunkpl 152 11408 0 10975 26 0 26 26 0 158 5 amappl16 200 1425 0 1402 4 0 4 4 0 8 1 amappl15 192 8 0 8 1 0 1 1 0 8 1 amappl14 184 6 0 6 1 0 1 1 0 8 1 amappl13 176 407 0 406 1 0 1 1 0 8 0 amappl12 168 924 0 887 2 0 2 2 0 8 0 amappl11 160 3 0 3 1 0 1 1 0 8 1 amappl10 152 61 0 50 1 0 1 1 0 8 0 amappl9 144 257 0 257 1 0 1 1 0 8 1 amappl8 136 38 0 36 1 0 1 1 0 8 0 amappl7 128 79 0 78 1 0 1 1 0 8 0 amappl6 120 257 0 246 1 0 1 1 0 8 0 amappl5 112 66 0 59 1 0 1 1 0 8 0 amappl4 104 375 0 353 1 0 1 1 0 8 0 amappl3 96 1841 0 1761 3 0 3 3 0 8 0 amappl2 88 621 0 554 2 0 2 2 0 8 0 amappl1 80 9161 0 8632 12 0 12 12 0 8 0 amappl 88 3272 0 3123 5 0 5 5 0 92 0 uvmvnodes 80 97 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 8 0 2 1 0 1 1 0 8 0 uaddrrnd 24 517 0 488 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 517 0 488 1 0 1 1 0 8 0 vmmpekpl 168 6422 0 6371 3 0 3 3 0 8 0 vmmpepl 168 39904 0 38171 82 0 82 82 0 357 3 vmsppl 368 516 0 488 4 0 4 4 0 8 1 rwobjpl 40 13630 0 12723 10 0 10 10 0 8 0 pdppl 4096 1046 0 980 100 32 68 82 0 8 2 pvpl 32 236039 0 227960 86 0 86 86 0 265 8 pmappl 216 519 0 489 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 387 0 32 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace mtx_enter(ffff80003ca66e10) at mtx_enter+0x6e sys/kern/kern_lock.c:549 filt_procdetach(fffffd8060de5c30) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff80002a7b02b0,fffffd8073604508,fffffd8073604580,2,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline] knote_remove(ffff80002a7b02b0,fffffd8073604508,fffffd8073604580,2,1) at knote_remove+0x22e sys/kern/kern_event.c:2154 kqueue_purge(ffff80002a7b02b0,fffffd8073604508) at kqueue_purge+0x117 sys/kern/kern_event.c:1890 kqueue_close(fffffd8073856618,ffff80002a7b02b0) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd8073856618,ffff80002a7b02b0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8073856618,ffff80002a7b02b0) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a7b02b0) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80002a7b02b0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a7b02b0,ffff80002f4eb090,ffff80002f4eafe0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002f4eb090) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002f4eb090) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6feef57a6a90, count: -12 ddb> machine ddbcpu 1 No such command ddb> trace mtx_enter(ffff80003ca66e10) at mtx_enter+0x6e sys/kern/kern_lock.c:549 filt_procdetach(fffffd8060de5c30) at filt_procdetach+0x4d sys/kern/kern_event.c:432 knote_remove(ffff80002a7b02b0,fffffd8073604508,fffffd8073604580,2,1) at knote_remove+0x22e filter_detach sys/kern/kern_event.c:-1 [inline] knote_remove(ffff80002a7b02b0,fffffd8073604508,fffffd8073604580,2,1) at knote_remove+0x22e sys/kern/kern_event.c:2154 kqueue_purge(ffff80002a7b02b0,fffffd8073604508) at kqueue_purge+0x117 sys/kern/kern_event.c:1890 kqueue_close(fffffd8073856618,ffff80002a7b02b0) at kqueue_close+0x48 sys/kern/kern_event.c:1934 fdrop(fffffd8073856618,ffff80002a7b02b0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8073856618,ffff80002a7b02b0) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a7b02b0) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80002a7b02b0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a7b02b0,ffff80002f4eb090,ffff80002f4eafe0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002f4eb090) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002f4eb090) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6feef57a6a90, count: -12