uvm_fault(0xffffffff839a8090, 0xffff80001acb54b3, 0, 2) -> d kernel: page fault trap, code=2 Stopped at memset+0x49: repe stosb %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND *437411 35957 0 0x2 0x1 0 syz-executor memset() at memset+0x49 ffs_write(ffff80002a7955d0) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd8068f66b40,ffff80002a795680,3,fffffd8007ffd8f0) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a7667d8,fffffd8068f66b40,fffffd8007ffd8f0,ffff80002a795758,ffff80002a795730) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692 ktrstruct(ffff80002a7667d8,ffffffff834b0a4a,ffff8000015a8898,8) at ktrstruct+0x188 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrstruct(ffff80002a7667d8,ffffffff834b0a4a,ffff8000015a8898,8) at ktrstruct+0x188 sys/kern/kern_ktrace.c:315 dopselect(ffff80002a7667d8,32,738d89f6e710,0,0,ffff80002a795b50,a74e7b4f51ed7119,ffff80002a795be0) at dopselect+0xc6b sys/kern/sys_generic.c:724 sys_pselect(ffff80002a7667d8,ffff80002a795c90,ffff80002a795be0) at sys_pselect+0x25a sys/kern/sys_generic.c:593 syscall(ffff80002a795c90) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a795c90) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x738d89f6e6c0, count: 6 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(0xffffffff839a8090, 0xffff80001acb54b3, 0, 2) -> d ddb> trace memset() at memset+0x49 ffs_write(ffff80002a7955d0) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd8068f66b40,ffff80002a795680,3,fffffd8007ffd8f0) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a7667d8,fffffd8068f66b40,fffffd8007ffd8f0,ffff80002a795758,ffff80002a795730) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692 ktrstruct(ffff80002a7667d8,ffffffff834b0a4a,ffff8000015a8898,8) at ktrstruct+0x188 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrstruct(ffff80002a7667d8,ffffffff834b0a4a,ffff8000015a8898,8) at ktrstruct+0x188 sys/kern/kern_ktrace.c:315 dopselect(ffff80002a7667d8,32,738d89f6e710,0,0,ffff80002a795b50,a74e7b4f51ed7119,ffff80002a795be0) at dopselect+0xc6b sys/kern/sys_generic.c:724 sys_pselect(ffff80002a7667d8,ffff80002a795c90,ffff80002a795be0) at sys_pselect+0x25a sys/kern/sys_generic.c:593 syscall(ffff80002a795c90) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a795c90) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x738d89f6e6c0, count: -9 ddb> show registers rdi 0xffff80001acb54b3 rsi 0 rbp 0xffff80002a7954f0 rbx 0x7f4b3 acpi_pdirpa+0x6b324 rdx 0x5 rcx 0x5 rax 0 r8 0xb48 r9 0xffff80002a795450 r10 0x12796bed220ce4fc r11 0xffff80001acb54b3 r12 0x34b3 __ALIGN_SIZE+0x24b3 r13 0x4000 __ALIGN_SIZE+0x3000 r14 0xfffffd8068f66b40 r15 0x1 rip 0xffffffff818c7bc9 memset+0x49 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff80002a7952e8 ss 0x10 memset+0x49: repe stosb %es:(%rdi) ddb> show proc PROC (syz-executor) tid=437411 pid=35957 tcnt=1 stat=onproc flags process=2 proc=1 runpri=24, usrpri=50, slppri=24, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a767c98,0xffff80002a7662b8 process=0xffff80002a79db10 user=0xffff80002a790000, vmspace=0xfffffd807ec66000 estcpu=0, cpticks=8, pctcpu=0.0, user=1, sys=7, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 81499 118484 27674 0 2 0xc80 syz-executor 81499 492641 27674 0 2 0x4000000 syz-executor 13609 279624 51718 0 2 0 syz-executor 13609 506601 51718 0 2 0x4000000 syz-executor 13609 519777 51718 0 3 0x4000080 fsleep syz-executor 13577 424642 16204 0 3 0x3000 suspend syz-executor 13577 107722 16204 0 2 0x4081000 syz-executor 48681 76579 36756 0 3 0x80 nanoslp syz-executor 48681 499908 36756 0 2 0x4000000 syz-executor 48681 441348 36756 0 3 0x4000000 inode syz-executor 48681 44167 36756 0 3 0x4000000 inode syz-executor 36756 27331 35957 0 3 0x82 nanoslp syz-executor 51718 94754 35957 0 2 0x3 syz-executor 53509 345074 35957 0 2 0x2 syz-executor 57720 516735 35957 0 2 0x2 syz-executor 55019 210744 35957 0 2 0x2 syz-executor 470 338952 35957 0 2 0x2 syz-executor 16204 405432 35957 0 3 0x82 nanoslp syz-executor 27674 123933 35957 0 2 0xc82 syz-executor *35957 437411 57843 0 7 0x3 syz-executor 57843 15060 17789 0 3 0x10008a sigsusp ksh 17789 505204 10954 0 3 0x98 kqread sshd-session 10954 432981 12341 0 3 0x92 kqread sshd-session 23936 146776 1 0 3 0x100083 ttyin getty 12341 361226 1 0 3 0x88 kqread sshd 61849 115501 67581 73 3 0x1100090 kqread syslogd 67581 99372 1 0 3 0x100082 sbwait syslogd 23343 349694 1 0 3 0x100080 kqread resolvd 28392 514558 23032 77 3 0x100092 kqread dhcpleased 63651 456660 23032 77 3 0x100092 kqread dhcpleased 23032 280347 1 0 3 0x80 kqread dhcpleased 63010 313463 0 0 3 0x14200 bored smr 39928 246460 0 0 2 0x14200 zerothread 47905 91061 0 0 3 0x14200 aiodoned aiodoned 34646 483625 0 0 3 0x14200 syncer update 73769 286572 0 0 3 0x14200 cleaner cleaner 52196 123538 0 0 3 0x14200 reaper reaper 99199 275083 0 0 3 0x14200 pgdaemon pagedaemon 2072 168302 0 0 3 0x14200 bored viomb 14552 142223 0 0 3 0x40014200 acpi0 acpi0 62192 475509 0 0 3 0x14200 bored softnet0 35732 116628 0 0 3 0x14200 bored systqmp 30681 400661 0 0 3 0x14200 bored systq 84451 243516 0 0 3 0x40014200 tmoslp softclock 20409 426290 0 0 3 0x40014200 idle0 1 93243 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11035 12103K 12265K 166960K 12215 0 pcb 17 12K 12K 166960K 29 0 rtable 243 7K 8K 166960K 377 0 pf 32 13K 17K 166960K 46 0 ifaddr 42 7K 7K 166960K 48 0 ifgroup 50 2K 2K 166960K 62 0 sysctl 1 1K 9K 166960K 6 0 counters 33 17K 18K 166960K 37 0 ioctlops 0 0K 4K 166960K 52 0 iov 0 0K 16K 166960K 3 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1300 82K 82K 166960K 1434 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 7 0K 0K 166960K 7 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 14 49K 97K 166960K 237 0 sigio 0 0K 0K 166960K 2 0 proc 60 59K 124K 166960K 512 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 15 0 in_multi 99 7K 7K 166960K 99 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 17 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 378 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 198 150K 159K 166960K 3791 0 UVM aobj 9 2K 2K 166960K 10 0 pinsyscall 35 70K 96K 166960K 1347 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 2K 166960K 31 0 temp 38 9099K 9164K 166960K 9935 0 kqueue 13 20K 26K 166960K 46 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 47 0 44 1 0 1 1 0 8 0 rtentry 136 111 0 1 4 0 4 4 0 8 0 unpcb 144 242 0 227 6 0 6 6 0 8 5 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 736 28 0 24 1 0 1 1 0 8 0 arp 96 18 0 0 1 0 1 1 0 8 0 inpcb 328 115 0 106 3 1 2 2 0 8 1 nd6 112 24 0 0 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 pfstscr 40 2 0 0 1 0 1 1 0 8 0 pfsrclim 320 1 0 1 1 0 1 1 0 8 1 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 2 0 0 1 0 1 1 0 8 0 pfstate 384 1 0 0 1 0 1 1 0 8 0 pfrule 1360 2 0 2 2 1 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 451 0 0 29 0 29 29 0 8 0 art_table 40 452 0 0 5 0 5 5 0 8 0 art_node 32 111 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semapl 64 5 0 0 1 0 1 1 0 8 0 shmpl 112 7 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1743 0 278 92 0 92 92 0 8 0 ffsino 256 1743 0 278 92 0 92 92 0 8 0 nchpl 144 2086 0 395 64 0 64 64 0 8 0 vnodes 216 1869 0 0 104 0 104 104 0 8 0 namei 1024 6365 0 6360 2 1 1 2 0 8 0 kstatmem 264 31 0 8 2 0 2 2 0 8 0 scxspl 216 7122 0 7120 11 3 8 8 1 8 7 plimitpl 152 43 0 27 1 0 1 1 0 8 0 sigapl 424 535 0 496 6 1 5 6 0 8 0 knotepl 120 7159 0 7112 16 7 9 10 0 8 6 kqueuepl 184 52 0 43 1 0 1 1 0 8 0 pipepl 304 128 0 101 3 0 3 3 0 8 0 fdescpl 448 522 0 496 5 1 4 5 0 8 0 filepl 120 2065 0 1856 11 0 11 11 0 8 3 lockfpl 104 36 0 34 1 0 1 1 0 8 0 lockfspl 48 16 0 14 1 0 1 1 0 8 0 sessionpl 144 25 0 17 1 0 1 1 0 8 0 pgrppl 48 36 0 20 1 0 1 1 0 8 0 ucredpl 104 209 0 198 1 0 1 1 0 8 0 zombiepl 144 558 0 557 2 1 1 1 0 8 0 processpl 1152 535 0 496 4 0 4 4 0 8 0 procpl 664 723 0 677 6 0 6 6 0 8 1 sosppl 176 1 0 1 1 0 1 1 0 8 1 sockpl 552 405 0 378 12 2 10 12 0 8 8 mcl64k 65536 9 0 9 2 1 1 1 0 8 1 mcl16k 16384 2 0 2 1 0 1 1 0 8 1 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 7 0 7 2 1 1 1 0 8 1 mcl4k 4096 2675 0 2623 14 6 8 14 0 8 0 mcl2k 2048 202 0 202 4 1 3 3 0 8 3 mtagpl 96 7 0 6 2 1 1 1 0 8 0 mbufpl 256 5658 0 5479 26 5 21 26 0 8 8 bufpl 280 2444 0 102 168 0 168 168 0 8 0 anonpl 24 82205 0 79279 21 0 21 21 0 186 0 amapchunkpl 152 10807 0 10412 28 1 27 27 0 158 9 amappl16 200 1055 0 1035 4 2 2 4 0 8 0 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 411 0 410 1 0 1 1 0 8 0 amappl13 176 117 0 106 1 0 1 1 0 8 0 amappl12 168 760 0 735 2 0 2 2 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 59 0 49 1 0 1 1 0 8 0 amappl9 144 269 0 269 1 1 0 1 0 8 0 amappl8 136 106 0 105 1 0 1 1 0 8 0 amappl7 128 140 0 129 1 0 1 1 0 8 0 amappl6 120 220 0 219 1 0 1 1 0 8 0 amappl5 112 98 0 89 1 0 1 1 0 8 0 amappl4 104 271 0 256 1 0 1 1 0 8 0 amappl3 96 2119 0 2028 4 0 4 4 0 8 0 amappl2 88 537 0 483 2 0 2 2 0 8 0 amappl1 80 10514 0 9983 13 0 13 13 0 8 1 amappl 88 3078 0 2941 5 0 5 5 0 92 0 uvmvnodes 80 101 0 0 3 0 3 3 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 9 0 1 1 0 1 1 0 8 0 uaddrrnd 24 522 0 496 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 522 0 496 1 0 1 1 0 8 0 vmmpekpl 168 6163 0 6130 2 0 2 2 0 8 0 vmmpepl 168 41493 0 39895 83 2 81 81 0 357 1 vmsppl 368 521 0 496 4 1 3 4 0 8 0 rwobjpl 40 14528 0 13610 11 1 10 11 0 8 0 pdppl 4096 1050 0 992 102 36 66 82 0 8 8 pvpl 32 232988 0 224747 83 1 82 82 0 265 1 pmappl 216 521 0 496 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 386 0 57 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace memset() at memset+0x49 ffs_write(ffff80002a7955d0) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd8068f66b40,ffff80002a795680,3,fffffd8007ffd8f0) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a7667d8,fffffd8068f66b40,fffffd8007ffd8f0,ffff80002a795758,ffff80002a795730) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692 ktrstruct(ffff80002a7667d8,ffffffff834b0a4a,ffff8000015a8898,8) at ktrstruct+0x188 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrstruct(ffff80002a7667d8,ffffffff834b0a4a,ffff8000015a8898,8) at ktrstruct+0x188 sys/kern/kern_ktrace.c:315 dopselect(ffff80002a7667d8,32,738d89f6e710,0,0,ffff80002a795b50,a74e7b4f51ed7119,ffff80002a795be0) at dopselect+0xc6b sys/kern/sys_generic.c:724 sys_pselect(ffff80002a7667d8,ffff80002a795c90,ffff80002a795be0) at sys_pselect+0x25a sys/kern/sys_generic.c:593 syscall(ffff80002a795c90) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a795c90) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x738d89f6e6c0, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace memset() at memset+0x49 ffs_write(ffff80002a7955d0) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd8068f66b40,ffff80002a795680,3,fffffd8007ffd8f0) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a7667d8,fffffd8068f66b40,fffffd8007ffd8f0,ffff80002a795758,ffff80002a795730) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692 ktrstruct(ffff80002a7667d8,ffffffff834b0a4a,ffff8000015a8898,8) at ktrstruct+0x188 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrstruct(ffff80002a7667d8,ffffffff834b0a4a,ffff8000015a8898,8) at ktrstruct+0x188 sys/kern/kern_ktrace.c:315 dopselect(ffff80002a7667d8,32,738d89f6e710,0,0,ffff80002a795b50,a74e7b4f51ed7119,ffff80002a795be0) at dopselect+0xc6b sys/kern/sys_generic.c:724 sys_pselect(ffff80002a7667d8,ffff80002a795c90,ffff80002a795be0) at sys_pselect+0x25a sys/kern/sys_generic.c:593 syscall(ffff80002a795c90) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a795c90) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x738d89f6e6c0, count: -9