login: uvm_fault(0xffffffff83b34cb8, 0xffff8000127420f8, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ffs2_balloc+0xa0d: movq 0(%rcx,%rax,8),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND 352285 25420 0 0x1000 0x4080000 0 syz-executor *313137 56769 0 0x2 0x1 1K syz-executor ffs2_balloc(fffffd806c4194c8,af5d8,50,fffffd80097fd618,1,ffff80002a3023c8) at ffs2_balloc+0xa0d sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a302450) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806b519dd0,ffff80002a302500,3,fffffd80097fd618) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a222540,fffffd806b519dd0,fffffd80097fd618,ffff80002a3025d0,ffff80002a3025b0) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:692 ktrsysret(ffff80002a222540,5b,0,ffff80002a3026a0) at ktrsysret+0x192 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a222540,5b,0,ffff80002a3026a0) at ktrsysret+0x192 sys/kern/kern_ktrace.c:209 syscall(ffff80002a302750) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a302750) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x722f33c4aea0, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xffffffff83b34cb8, 0xffff8000127420f8, 0, 1) -> d ddb{1}> trace ffs2_balloc(fffffd806c4194c8,af5d8,50,fffffd80097fd618,1,ffff80002a3023c8) at ffs2_balloc+0xa0d sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a302450) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806b519dd0,ffff80002a302500,3,fffffd80097fd618) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a222540,fffffd806b519dd0,fffffd80097fd618,ffff80002a3025d0,ffff80002a3025b0) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:692 ktrsysret(ffff80002a222540,5b,0,ffff80002a3026a0) at ktrsysret+0x192 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a222540,5b,0,ffff80002a3026a0) at ktrsysret+0x192 sys/kern/kern_ktrace.c:209 syscall(ffff80002a302750) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a302750) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x722f33c4aea0, count: -7 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a302370 rbx 0 rdx 0 rcx 0xffff800012742000 rax 0x1f r8 0xffffffffffffffff r9 0xffff80002a3023c8 r10 0x6b6ea66ff83e5ffb r11 0x78668d338226690a r12 0x1 r13 0xffff800000c31800 r14 0xffff80002a302200 r15 0xfffffd805f2bab18 rip 0xffffffff82b9dc7d ffs2_balloc+0xa0d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a3021f0 ss 0 ffs2_balloc+0xa0d: movq 0(%rcx,%rax,8),%r14 ddb{1}> show proc PROC (syz-executor) tid=313137 pid=56769 tcnt=1 stat=onproc flags process=2 proc=1 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a222010,0xffff8000fffefa18 process=0xffff8000ffff5818 user=0xffff80002a2fd000, vmspace=0xfffffd800b0635b8 estcpu=36, cpticks=28, pctcpu=0.13, user=0, sys=27, intr=1 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 35023 305306 45454 0 2 0x82000 syz-executor 35023 87025 45454 0 4 0x4082000 syz-executor 35023 89666 45454 0 3 0x4002000 suspend syz-executor 35023 187487 45454 0 2 0x4082000 syz-executor 41791 284759 56769 0 2 0x10 syz-executor 41791 340755 56769 0 2 0x4000010 syz-executor 32673 172914 8353 0 2 0 syz-executor 32673 366032 8353 0 3 0x4000080 kqread syz-executor 26851 351166 52311 0 2 0 syz-executor 26851 309064 52311 0 3 0x4000080 fsleep syz-executor 26851 502715 52311 0 3 0x4000080 fsleep syz-executor 82599 138392 74327 60929 2 0x10 syz-executor 82599 224028 74327 60929 2 0x4000010 syz-executor 37668 353181 81402 0 3 0x80 nanoslp syz-executor 37668 9464 81402 0 3 0x4000080 pipewr syz-executor 37668 58771 81402 0 3 0x4000080 fsleep syz-executor 58240 134652 1 0 3 0x100083 ttyin getty 25420 143423 25669 0 3 0x3000 suspend syz-executor 25420 352285 25669 0 7 0x4081000 syz-executor 33547 43027 0 0 3 0x14200 acct acct 25669 471780 74968 0 3 0x82 wait syz-executor 62426 181680 74968 0 2 0x2 syz-executor 74327 381972 74968 0 3 0x82 nanoslp syz-executor 52311 342515 74968 0 3 0x82 nanoslp syz-executor *56769 313137 74968 0 7 0x3 syz-executor 8353 241604 74968 0 3 0x82 nanoslp syz-executor 45454 515319 74968 0 3 0x82 nanoslp syz-executor 81402 201500 74968 0 3