login: uvm_fault(0xffffffff839b6390, 0xffff800024773ad2, 0, 2) -> d kernel: page fault trap, code=2 Stopped at memset+0x49: repe stosb %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND *430915 25956 0 0x2 0x1 0 syz-executor memset() at memset+0x49 ffs_write(ffff80002a80d200) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffff5807c308118,ffff80002a80d2b0,3,fffff58007ffd820) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a767c98,fffff5807c308118,fffff58007ffd820,ffff80002a80d380,ffff80002a80d360) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692 ktrsysret(ffff80002a767c98,88,16,ffff80002a80d440) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a767c98,88,16,ffff80002a80d440) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209 syscall(ffff80002a80d4f0) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a80d4f0) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7894858f0540, count: 8 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(0xffffffff839b6390, 0xffff800024773ad2, 0, 2) -> d ddb> trace memset() at memset+0x49 ffs_write(ffff80002a80d200) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffff5807c308118,ffff80002a80d2b0,3,fffff58007ffd820) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a767c98,fffff5807c308118,fffff58007ffd820,ffff80002a80d380,ffff80002a80d360) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692 ktrsysret(ffff80002a767c98,88,16,ffff80002a80d440) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a767c98,88,16,ffff80002a80d440) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209 syscall(ffff80002a80d4f0) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a80d4f0) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7894858f0540, count: -7 ddb> show registers rdi 0xffff800024773ad2 rsi 0 rbp 0xffff80002a80d120 rbx 0x3dad2 acpi_pdirpa+0x29943 rdx 0x6 rcx 0x6 rax 0 r8 0x2528 __ALIGN_SIZE+0x1528 r9 0xffff80002a80d080 r10 0x22b134b6942bd1ab r11 0xffff800024773ad2 r12 0x1ad2 __ALIGN_SIZE+0xad2 r13 0x4000 __ALIGN_SIZE+0x3000 r14 0xfffff5807c308118 r15 0x1 rip 0xffffffff82de66f9 memset+0x49 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff80002a80cf18 ss 0x10 memset+0x49: repe stosb %es:(%rdi) ddb> show proc PROC (syz-executor) tid=430915 pid=25956 tcnt=1 stat=onproc flags process=2 proc=1 runpri=17, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7674d0,0xffff80002a736fa8 process=0xffff80002a79cd90 user=0xffff80002a808000, vmspace=0xfffff5807c0ae8a8 estcpu=36, cpticks=7, pctcpu=0.0, user=1, sys=6, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 33550 9553 2256 0 2 0 syz-executor 33550 111591 2256 0 2 0x4000000 syz-executor 38435 200439 85456 0 2 0 syz-executor 38435 223912 85456 0 3 0x4000080 fsleep syz-executor 2301 479386 39464 0 2 0 syz-executor 2301 37989 39464 0 3 0x4000080 fsleep syz-executor 71406 32701 19781 0 2 0 syz-executor 71406 166237 19781 0 2 0x4000c80 syz-executor 42451 484551 79147 0 2 0 syz-executor 42451 503207 79147 0 3 0x4000080 kqsel syz-executor 42451 119250 79147 0 3 0x4000080 fsleep syz-executor 19693 134010 59051 0 2 0 syz-executor 19693 128020 59051 0 3 0x4000080 fsleep syz-executor 19693 260792 59051 0 3 0x4000080 fsleep syz-executor 78967 140442 16584 0 2 0 syz-executor 78967 456873 16584 0 3 0x4000088 kqpoll syz-executor 78967 375533 16584 0 3 0x4000080 fsleep syz-executor 53768 287413 1 0 3 0x100083 ttyin getty 83267 111690 0 0 3 0x14200 acct acct 59051 335707 31551 0 2 0xc82 syz-executor 2256 153003 31551 0 2 0xc82 syz-executor 39464 53562 31551 0 2 0xc82 syz-executor 16584 14857 31551 0 3 0x82 nanoslp syz-executor 19781 388027 31551 0 3 0x82 nanoslp syz-executor *25956 430915 31551 0 7 0x3 syz-executor 85456 37348 31551 0 2 0xc82 syz-executor 79147 8231 31551 0 2 0xc82 syz-executor 31551 220498 1 0 3 0x82 kqread syz-executor 58046 226687 0 0 3 0x14200 bored smr 51538 28311 0 0 2 0x14200 zerothread 38023 433105 0 0 3 0x14200 aiodoned aiodoned 37181 106006 0 0 3 0x14200 syncer update 50599 1740 0 0 3 0x14200 cleaner cleaner 48678 80259 0 0 3 0x14200 reaper reaper 46637 164088 0 0 3 0x14200 pgdaemon pagedaemon 48226 343196 0 0 3 0x14200 bored viomb 66247 95905 0 0 3 0x40014200 acpi0 acpi0 47521 167123 0 0 3 0x14200 bored softnet0 87896 45698 0 0 3 0x14200 smrbar systqmp 22302 318511 0 0 3 0x14200 bored systq 44010 360181 0 0 3 0x40014200 tmoslp softclock 55951 465683 0 0 3 0x40014200 idle0 1 512058 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 11038 12188K 12443K 166960K 12659 0 pcb 18 13K 17K 166960K 199 0 rtable 267 10K 11K 166960K 468 0 pf 34 13K 74K 166960K 136 0 ifaddr 42 7K 8K 166960K 62 0 ifgroup 50 2K 2K 166960K 88 0 sysctl 3 1K 9K 166960K 7 0 counters 33 17K 18K 166960K 50 0 ioctlops 0 0K 4K 166960K 145 0 iov 0 0K 16K 166960K 32 0 mount 1 1K 1K 166960K 1 0 log 1 0K 0K 166960K 5 0 vnodes 1360 86K 86K 166960K 1919 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 20K 24K 166960K 14 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 39 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 16 61K 93K 166960K 653 0 sigio 0 0K 0K 166960K 5 0 proc 21 25K 100K 166960K 597 0 subproc 72 4K 4K 166960K 73 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 95 0 in_multi 89 6K 7K 166960K 112 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 14 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 487 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 138 82K 174K 166960K 7685 0 UVM aobj 15 2K 2K 166960K 17 0 pinsyscall 19 38K 94K 166960K 1765 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 16 0 NDP 11 0K 2K 166960K 38 0 temp 52 9109K 9173K 166960K 27305 0 kqueue 1 2K 27K 166960K 126 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 68 0 68 1 0 1 1 0 8 1 rtentry 136 135 0 20 5 0 5 5 0 8 0 unpcb 144 477 0 477 4 0 4 4 0 8 4 syncache 336 10 0 10 1 0 1 1 0 8 1 tcpcb 736 286 0 280 7 0 7 7 0 8 6 arp 96 21 0 1 1 0 1 1 0 8