Don't Panic - how do I investigate a kernel panic?
Hi, I have a 5.3-STABLE which was stable untill last friday. Since then I experience irregular panics, with uptimes between 25 secs and 16 hours. In most cases I got a fatal trap 12, the last panic was simply panic: sbdrop. I had 5.3p5 but upgraded to 5.3p8 after the first panics. After the last trap 12, I replaced my custom kernel with a fresh built GENERIC, as I thought it might be easier to investigate. I have experienced trap 12 before startup completed and after shutdown unmounted all disks. So, it seems not to be triggered by network events. However, about the same time as the first panic and since then, I have experienced an unusually high amount of ilicit mail delivery attempts to adresses like random_chars@mydomain.com - not the amount I would expect could cause a crash though, my connection is far to thin for that. Following the kernel panic faq: Fatal trap 12: Page fault while in kernel mode Fault virtual address = 0xc Fault code = supervisor read, page not present instruction pointer = 0x8:0xc053d638 stack pointer = 0x10:0xcb4ddaec frame pointer = 0x10:0xcb4ddaf8 code segment= base 0x0, limit 0x, type 0x1b = DPL 0, pres 1, def32 1, gran 1 processor eflags= interrupt enabled, resume, IOPL=0 current process = 28 (swi1:net) trap number = 12 panic: page fault # nm -n /boot/kernel/kernel | grep c053d6 c053d610 T m_copydata c053d670 T m_dup Note: This was the same error for both the custom p5 and p8 kernels. The sbdrop panic happened with the GENERIC kernel. What does sbdrop mean? Is this a simple disk I/O or hardware error? How do I get on from here? How do I keep my system at least at minimum service without crashing? Thanks! Erik -- Ph: +34.666334818 web: http://www.locolomo.org S/MIME Certificate: http://www.locolomo.org/crt/2004071206.crt Subject ID: A9:76:7A:ED:06:95:2B:8D:48:97:CE:F2:3F:42:C8:F2:22:DE:4C:B9 Fingerprint: 4A:E8:63:38:46:F6:9A:5D:B4:DC:29:41:3F:62:D3:0A:73:25:67:C2 ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Don't Panic - how do I investigate a kernel panic?
On Tue, Apr 12, 2005 at 11:19:02PM +0200, Erik N?rgaard wrote: Hi, I have a 5.3-STABLE which was stable untill last friday. Since then I experience irregular panics, with uptimes between 25 secs and 16 hours. In most cases I got a fatal trap 12, the last panic was simply panic: sbdrop. I had 5.3p5 but upgraded to 5.3p8 after the first panics. After the last trap 12, I replaced my custom kernel with a fresh built GENERIC, as I thought it might be easier to investigate. I have experienced trap 12 before startup completed and after shutdown unmounted all disks. So, it seems not to be triggered by network events. However, about the same time as the first panic and since then, I have experienced an unusually high amount of ilicit mail delivery attempts to adresses like random_chars@mydomain.com - not the amount I would expect could cause a crash though, my connection is far to thin for that. Following the kernel panic faq: Fatal trap 12: Page fault while in kernel mode Fault virtual address = 0xc Fault code = supervisor read, page not present instruction pointer = 0x8:0xc053d638 stack pointer = 0x10:0xcb4ddaec frame pointer = 0x10:0xcb4ddaf8 code segment= base 0x0, limit 0x, type 0x1b = DPL 0, pres 1, def32 1, gran 1 processor eflags= interrupt enabled, resume, IOPL=0 current process = 28 (swi1:net) trap number = 12 panic: page fault # nm -n /boot/kernel/kernel | grep c053d6 c053d610 T m_copydata c053d670 T m_dup Note: This was the same error for both the custom p5 and p8 kernels. The sbdrop panic happened with the GENERIC kernel. What does sbdrop mean? Is this a simple disk I/O or hardware error? How do I get on from here? Upgrade to 5.4, I believe this was fixed some time ago. If you still see it, then follow the directions in the developers' handbook about compiling your kernel with debugging symbols and obtaining a traceback. Kris pgpVRaFubOsIv.pgp Description: PGP signature
