Date: Fri, 23 Dec 2022 10:13:18 +0100 From: Andrea Venturoli <ml@netfence.it> To: freebsd-questions@freebsd.org Subject: Help with crash (13.1/amd64) Message-ID: <f9df5b20-ab15-d887-6eb8-14924e8295bc@netfence.it>
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Hello. One of my servers started rebooting every few days (usually in the middle of the night) and I'd like to find out why. I'm trying hard to get a core, but so far I was not able to achieve this. Meanwhile... usually there's absolutely nothing in the log, but today it left me this: > Dec 23 04:31:20 xxx syslogd: restart > Dec 23 04:31:20 xxx syslogd: kernel boot file is /boot/kernel/kernel > Dec 23 04:31:20 xxx kernel: > Dec 23 04:31:20 xxx syslogd: last message repeated 1 times > Dec 23 04:31:20 xxx kernel: Fatal trap 12: page fault while in kernel mode > Dec 23 04:31:20 xxx kernel: cpuid = 6; apic id = 0a > Dec 23 04:31:20 xxx kernel: fault virtual address = 0x8000010 > Dec 23 04:31:20 xxx kernel: fault code = supervisor write data, page not present > Dec 23 04:31:20 xxx kernel: instruction pointer = 0x20:0xffffffff80969088 > Dec 23 04:31:20 xxx kernel: stack pointer = 0x28:0xfffffe0146fc1c90 > Dec 23 04:31:20 xxx kernel: frame pointer = 0x28:0xfffffe0146fc1d60 > Dec 23 04:31:20 xxx kernel: code segment = base 0x0, limit 0xfffff, type 0x1b > Dec 23 04:31:20 xxx kernel: = DPL 0, pres 1, long 1, def32 0, gran 1 > Dec 23 04:31:20 xxx kernel: processor eflags = interrupt enabled, resume, IOPL = 0 > Dec 23 04:31:20 xxx kernel: current process = 69739 (sshd) > Dec 23 04:31:20 xxx kernel: trap number = 12 > Dec 23 04:31:20 xxx kernel: panic: page fault > Dec 23 04:31:20 xxx kernel: cpuid = 6 > Dec 23 04:31:20 xxx kernel: time = 1671766191 > Dec 23 04:31:20 xxx kernel: KDB: stack backtrace: > Dec 23 04:31:20 xxx kernel: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0146fc1a50 > Dec 23 04:31:20 xxx kernel: vpanic() at vpanic+0x17f/frame 0xfffffe0146fc1aa0 > Dec 23 04:31:20 xxx kernel: panic() at panic+0x43/frame 0xfffffe0146fc1b00 > Dec 23 04:31:20 xxx kernel: trap_fatal() at trap_fatal+0x385/frame 0xfffffe0146fc1b60 > Dec 23 04:31:20 xxx kernel: trap_pfault() at trap_pfault+0x4f/frame 0xfffffe0146fc1bc0 > Dec 23 04:31:20 xxx kernel: calltrap() at calltrap+0x8/frame 0xfffffe0146fc1bc0 > Dec 23 04:31:20 xxx kernel: --- trap 0xc, rip = 0xffffffff80969088, rsp = 0xfffffe0146fc1c90, rbp = 0xfffffe0146fc1d60 --- > Dec 23 04:31:20 xxx kernel: pmap_remove_pages() at pmap_remove_pages+0x418/frame 0xfffffe0146fc1d60 > Dec 23 04:31:20 xxx kernel: vmspace_exit() at vmspace_exit+0x7f/frame 0xfffffe0146fc1d90 > Dec 23 04:31:20 xxx kernel: exit1() at exit1+0x55f/frame 0xfffffe0146fc1df0 > Dec 23 04:31:20 xxx kernel: sys_sys_exit() at sys_sys_exit+0xd/frame 0xfffffe0146fc1e00 > Dec 23 04:31:20 xxx kernel: amd64_syscall() at amd64_syscall+0x103/frame 0xfffffe0146fc1f30 > Dec 23 04:31:20 xxx kernel: fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe0146fc1f30 > Dec 23 04:31:20 xxx kernel: --- syscall (1, FreeBSD ELF64, sys_sys_exit), rip = 0x8016b82da, rsp = 0x7fffffffd0d8, rbp = 0x7fffffffd0f0 --- > Dec 23 04:31:20 xxx kernel: Uptime: 7d1h22m11s > Dec 23 04:31:20 xxx kernel: ---<<BOOT>>--- > Dec 23 04:31:20 xxx kernel: Copyright (c) 1992-2021 The FreeBSD Project. > Dec 23 04:31:20 xxx kernel: Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 > Dec 23 04:31:20 xxx kernel: The Regents of the University of California. All rights reserved. > Dec 23 04:31:20 xxx kernel: FreeBSD is a registered trademark of The FreeBSD Foundation. > Dec 23 04:31:20 xxx kernel: FreeBSD 13.1-RELEASE-p3 releng/netfence_13.1-n250175-0133d0d8859 xxx amd64 Does this suggest anything to anyone? bye & Thanks av. P.S. Yes, I'm under SSH dictonary attack, and yes, I've got it on a non standard port, I'm fighting this with fail2ban, and no, they won't get at nothing, since password auth is disabled.
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