login: uvm_fault(0xffffffff839d3278, 0xffff800028952018, 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 *495478 97396 0 0x2 0x1 0 syz-executor ffs2_balloc(fffffd806f3a2000,3ddaf,50,fffffd8007ffd478,1,ffff80002a7d4cb8) at ffs2_balloc+0xa0a sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a7d4d40) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806d7fb060,ffff80002a7d4df0,3,fffffd8007ffd478) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a76c010,fffffd806d7fb060,fffffd8007ffd478,ffff80002a7d4ec0,ffff80002a7d4ea0) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692 ktrsysret(ffff80002a76c010,5b,0,ffff80002a7d4f80) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a76c010,5b,0,ffff80002a7d4f80) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209 syscall(ffff80002a7d5030) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a7d5030) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73d3e04e37d0, 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(0xffffffff839d3278, 0xffff800028952018, 0, 1) -> d ddb> trace ffs2_balloc(fffffd806f3a2000,3ddaf,50,fffffd8007ffd478,1,ffff80002a7d4cb8) at ffs2_balloc+0xa0a sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a7d4d40) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806d7fb060,ffff80002a7d4df0,3,fffffd8007ffd478) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a76c010,fffffd806d7fb060,fffffd8007ffd478,ffff80002a7d4ec0,ffff80002a7d4ea0) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692 ktrsysret(ffff80002a76c010,5b,0,ffff80002a7d4f80) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a76c010,5b,0,ffff80002a7d4f80) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209 syscall(ffff80002a7d5030) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a7d5030) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73d3e04e37d0, count: -7 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002a7d4c60 rbx 0xfffffd806f3a2000 rdx 0 rcx 0xffff800028952000 rax 0x3 r8 0xffffffffffffffff r9 0xffff80002a7d4cb8 r10 0xad1564d948522dc3 r11 0xbb9e804c55a4ccf1 r12 0x1 r13 0xffff800000c47800 r14 0xffff80002a7d4b00 r15 0xfffffd806d19e350 rip 0xffffffff818f94ca ffs2_balloc+0xa0a cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a7d4af0 ss 0 ffs2_balloc+0xa0a: movq 0(%rcx,%rax,8),%r14 ddb> show proc PROC (syz-executor) tid=495478 pid=97396 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=0xffff80002a76ca70,0xffff80002a76d248 process=0xffff80002a788010 user=0xffff80002a7d0000, vmspace=0xfffffd807ec65cf0 estcpu=36, cpticks=20, pctcpu=0.1, user=3, sys=17, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 52361 151012 42284 0 2 0 syz-executor 52361 438423 42284 0 3 0x4000080 fsleep syz-executor 99351 140881 27454 0 2 0 syz-executor 99351 207026 27454 0 3 0x4000080 fsleep syz-executor 17153 124452 24937 0 2 0 syz-executor 17153 299018 24937 0 3 0x4000080 fsleep syz-executor 27275 324214 32919 0 3 0x80 nanoslp syz-executor 27275 162281 32919 0 3 0x4000080 kqsel syz-executor 27275 297353 32919 0 3 0x4000080 fsleep syz-executor 7178 260208 97396 0 3 0x80 nanoslp syz-executor 7178 424703 97396 0 3 0x4000080 kqsel syz-executor 7178 259456 97396 0 3 0x4000080 fsleep syz-executor 66800 462199 0 0 3 0x14280 nfsidl nfsio 86212 392220 0 0 3 0x14280 nfsidl nfsio 91824 332397 0 0 3 0x14280 nfsidl nfsio 51349 90765 0 0 3 0x14280 nfsidl nfsio 27356 15971 0 0 3 0x14280 nfsidl nfsio 22740 275401 0 0 3 0x14280 nfsidl nfsio 41849 67703 0 0 3 0x14280 nfsidl nfsio 49001 475771 0 0 3 0x14280 nfsidl nfsio 83230 17029 0 0 3 0x14280 nfsidl nfsio 58249 300140 0 0 3 0x14280 nfsidl nfsio 31829 477220 0 0 3 0x14280 nfsidl nfsio 42681 333169 0 0 3 0x14280 nfsidl nfsio 80470 355687 0 0 3 0x14280 nfsidl nfsio 66210 47342 0 0 3 0x14280 nfsidl nfsio 10811 158318 0 0 3 0x14280 nfsidl nfsio 97555 215287 0 0 3 0x14280 nfsidl nfsio 47269 367847 0 0 3 0x14280 nfsidl nfsio 79043 178815 0 0 3 0x14280 nfsidl nfsio 31146 252899 0 0 3 0x14280 nfsidl nfsio 415 227935 0 0 3 0x14280 nfsidl nfsio 90527 126566 1 0 3 0x100083 ttyin getty 12732 327540 58882 0 3 0x82 nanoslp syz-executor 90247 511230 0 0 3 0x14200 acct acct 38781 392783 61444 0 3 0x100082 sbwait arp 61444 198064 8929 0 3 0x10008a sigsusp sh 27454 85295 58882 0 3 0x82 nanoslp syz-executor 32919 333351 58882 0 3 0x82 nanoslp syz-executor 8929 492142 58882 0 3 0x82 wait syz-executor 42284 328983 58882 0 2 0xc82 syz-executor 83918 358726 58882 0 3 0x82 nanoslp syz-executor 24937 11463 58882 0 3 0x82 nanoslp syz-executor *97396 495478 58882 0 7 0x3 syz-executor 58882 328848 1 0 3 0x82 kqread syz-executor 61477 115149 0 0 3 0x14200 bored smr 29406 202180 0 0 2 0x14200 zerothread 89325 156863 0 0 3 0x14200 aiodoned aiodoned 15917 97453 0 0 3 0x14200 syncer update 17379 511129 0 0 3 0x14200 cleaner cleaner 38921 471015 0 0 3 0x14200 reaper reaper 26413 175478 0 0 3 0x14200 pgdaemon pagedaemon 56934 285266 0 0 3 0x14200 bored viomb 25391 396075 0 0 3 0x40014200 acpi0 acpi0 55277 371923 0 0 3 0x14200 bored softnet0 50985 266456 0 0 3 0x14200 bored systqmp 97139 252486 0 0 3 0x14200 bored systq 54103 505972 0 0 3 0x40014200 tmoslp softclock 82900 401247 0 0 3 0x40014200 idle0 1 112669 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb>