| TITLE: Fatal trap 12: page fault in vm_page_unhold_pages |
| |
| Fatal trap 12: page fault while in kernel mode |
| cpuid = 0; apic id = 00 |
| fault virtual address = 0x30 |
| fault code = supervisor read data , page not present |
| instruction pointer = 0x20:0xffffffff8156d61a |
| stack pointer = 0x28:0xfffffe001facc7a0 |
| frame pointer = 0x28:0xfffffe001facc7e0 |
| code segment = base 0x0, limit 0xfffff, type 0x1b |
| = DPL 0, pres 1, long 1, def32 0, gran 1 |
| processor eflags = interrupt enabled, resume, IOPL = 0 |
| current process = 2213 (syz-executor.0) |
| trap number = 12 |
| panic: page fault |
| cpuid = 0 |
| time = 4 |
| KDB: stack backtrace: |
| db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe001facc400 |
| vpanic() at vpanic+0x1e0/frame 0xfffffe001facc460 |
| panic() at panic+0x43/frame 0xfffffe001facc4c0 |
| trap_fatal() at trap_fatal+0x4c6/frame 0xfffffe001facc540 |
| trap_pfault() at trap_pfault+0x9f/frame 0xfffffe001facc5b0 |
| trap() at trap+0x44d/frame 0xfffffe001facc6d0 |
| calltrap() at calltrap+0x8/frame 0xfffffe001facc6d0 |
| --- trap 0xc, rip = 0xffffffff8156d61a, rsp = 0xfffffe001facc7a0, rbp = 0xfffffe001facc7e0 --- |
| vm_page_unhold_pages() at vm_page_unhold_pages+0x5a/frame 0xfffffe001facc7e0 |
| pipe_write() at pipe_write+0x16d8/frame 0xfffffe001facc8b0 |
| dofilewrite() at dofilewrite+0xfd/frame 0xfffffe001facc910 |
| kern_writev() at kern_writev+0x66/frame 0xfffffe001facc950 |
| sys_writev() at sys_writev+0x50/frame 0xfffffe001facc980 |
| amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe001faccab0 |
| fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe001faccab0 |
| --- syscall (198, FreeBSD ELF64, nosys), rip = 0x412e5a, rsp = 0x7fffdfffdf38, rbp = 0x3 --- |
| KDB: enter: panic |
| [ thread pid 2213 tid 100330 ] |
| Stopped at kdb_enter+0x6a: movq $0,kdb_why |
