login: uvm_fault(0xffffffff83a07010, 0xffff800025622058, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ffs2_balloc+0xa0a: movq 0(%rcx,%rax,8),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND *505758 73170 0 0 0x4000001 0 syz-executor ffs2_balloc(fffff6006eec4100,5e943,48,fffff60007ffd958,1,ffff80002fcaf468) at ffs2_balloc+0xa0a sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002fcaf4f0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffff6006dd5f980,ffff80002fcaf5a0,3,fffff60007ffd958) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80003a8e27f0,fffff6006dd5f980,fffff60007ffd958,ffff80002fcaf670,ffff80002fcaf650) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692 ktrsysret(ffff80003a8e27f0,36,5,ffff80002fcaf730) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80003a8e27f0,36,5,ffff80002fcaf730) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209 syscall(ffff80002fcaf7e0) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002fcaf7e0) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x12e520034e0, 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(0xffffffff83a07010, 0xffff800025622058, 0, 1) -> d ddb> trace ffs2_balloc(fffff6006eec4100,5e943,48,fffff60007ffd958,1,ffff80002fcaf468) at ffs2_balloc+0xa0a sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002fcaf4f0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffff6006dd5f980,ffff80002fcaf5a0,3,fffff60007ffd958) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80003a8e27f0,fffff6006dd5f980,fffff60007ffd958,ffff80002fcaf670,ffff80002fcaf650) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692 ktrsysret(ffff80003a8e27f0,36,5,ffff80002fcaf730) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80003a8e27f0,36,5,ffff80002fcaf730) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209 syscall(ffff80002fcaf7e0) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002fcaf7e0) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x12e520034e0, count: -7 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002fcaf410 rbx 0xfffff6006eec4100 rdx 0xffff8000015e7480 rcx 0xffff800025622000 rax 0xb r8 0xffffffffffffffff r9 0xffff80002fcaf468 r10 0x28c9875d36939cbc r11 0x93107ce66414e02c r12 0x1 r13 0xffff800000c47800 r14 0xffff80002fcaf2b0 r15 0xfffff60062785118 rip 0xffffffff81dd947a ffs2_balloc+0xa0a cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002fcaf2a0 ss 0x10 ffs2_balloc+0xa0a: movq 0(%rcx,%rax,8),%r14 ddb> show proc PROC (syz-executor) tid=505758 pid=73170 tcnt=2 stat=onproc flags process=0 proc=4000001 runpri=32, usrpri=78, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003a8e34e8,0xffff80003c8fb258 process=0xffff80002a750920 user=0xffff80002fcaa000, vmspace=0xfffff6006cfd42f0 estcpu=28, cpticks=7, pctcpu=0.6, user=0, sys=7, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 15258 287352 50569 0 2 0x1000000 syz-executor 15258 514635 50569 0 3 0x5000080 sbwait syz-executor 63115 348941 13158 0 2 0 syz-executor 63115 382358 13158 0 2 0x4000000 syz-executor 2323 27555 13652 0 2 0 syz-executor 2323 354521 13652 0 3 0x4000080 fsleep syz-executor 60870 234494 10282 0 2 0 syz-executor 29263 329099 33432 0 2 0 syz-executor 29263 439392 33432 0 3 0x4000080 fsleep syz-executor 10595 438258 37139 0 2 0 syz-executor 10595 110641 37139 0 3 0x4000080 fsleep syz-executor 73170 166094 1823 0 2 0 syz-executor *73170 505758 1823 0 7 0x4000001 syz-executor 55622 251018 1 0 3 0x100083 ttyin getty 45918 111080 0 0 3 0x14280 nfsidl nfsio 43127 267654 0 0 3 0x14280 nfsidl nfsio 9099 58826 0 0 3 0x14280 nfsidl nfsio 88106 131852 0 0 3 0x14280 nfsidl nfsio 48189 208894 0 0 3 0x14280 nfsidl nfsio 65420 300229 0 0 3 0x14280 nfsidl nfsio 23932 224652 0 0 3 0x14280 nfsidl nfsio 56878 88322 0 0 3 0x14280 nfsidl nfsio 3492 305955 0 0 3 0x14280 nfsidl nfsio 75428 446877 0 0 3 0x14280 nfsidl nfsio 80030 200167 0 0 3 0x14280 nfsidl nfsio 44179 365282 0 0 3 0x14280 nfsidl nfsio 83866 444776 0 0 3 0x14280 nfsidl nfsio 12476 271752 0 0 3 0x14280 nfsidl nfsio 19944 469067 0 0 3 0x14280 nfsidl nfsio 28991 431749 0 0 3 0x14280 nfsidl nfsio 56276 415588 0 0 3 0x14280 nfsidl nfsio 42742 280015 0 0 3 0x14280 nfsidl nfsio 9461 171751 0 0 3 0x14280 nfsidl nfsio 42286 310712 0 0 3 0x14280 nfsidl nfsio 37139 256795 22549 0 2 0xc82 syz-executor 33432 297668 22549 0 2 0xc82 syz-executor 1823 29826 22549 0 2 0xc82 syz-executor 13652 196843 22549 0 2 0xc82 syz-executor 50569 458350 22549 0 2 0xc82 syz-executor 83539 410100 22549 0 2 0x2 syz-executor 13158 315813 22549 0 2 0xc82 syz-executor 10282 360509 22549 0 2 0xc82 syz-executor 22549 462853 1 0 3 0x82 kqread syz-executor 48782 34560 0 0 3 0x14200 bored smr 73343 134993 0 0 2 0x14200 zerothread 14452 71707 0 0 3 0x14200 aiodoned aiodoned 40235 309601 0 0 3 0x14200 syncer update 5059 42859 0 0 3 0x14200 cleaner cleaner 17761 404325 0 0 3 0x14200 reaper reaper 76442 336366 0 0 3 0x14200 pgdaemon pagedaemon 69606 514153 0 0 3 0x14200 bored viomb 54187 236339 0 0 3 0x40014200 acpi0 acpi0 32628 371598 0 0 2 0x14200 softnet0 84390 434937 0 0 3 0x14200 bored systqmp 82717 464645 0 0 3 0x14200 bored systq 68448 371989 0 0 3 0x40014200 tmoslp softclock 42103 134608 0 0 3 0x40014200 idle0 1 297274 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb>