I have a fairly recent 8-stable machine running under VMWare ESXi 3.5 (amd64 guest), which apparently crashes every few days from the same causes: em0: discard frame w/o packet header em0: discard frame w/o packet header em0: discard frame w/o packet header Panic string: sbsndptr: sockbuf 0xffffff007cca8c20 and mbuf 0xffffff00490a6400 clashing More information available here: http://ivoras.net/stuff/crash/info.0.txt http://ivoras.net/stuff/crash/core.txt.0.txt The crash looks like is provoked by ssh bruteforce attack attempts, some of which are blocked by an ipfw-based blocker. Any ideas? The machine was previously (until a month ago) running 7.2-RELEASE without these panics.
Ivan Voras wrote:> I have a fairly recent 8-stable machine running under VMWare ESXi 3.5 > (amd64 guest), which apparently crashes every few days from the same > causes: > > em0: discard frame w/o packet header > em0: discard frame w/o packet header > em0: discard frame w/o packet header > Panic string: sbsndptr: sockbuf 0xffffff007cca8c20 and mbuf > 0xffffff00490a6400 clashingIn case someone is interested or has an idea - on this machine I have multiple crashed cores with similarily strange problems all connected with networking and/or the em driver: 1) em0: watchdog timeout -- resetting Fatal trap 12: page fault while in kernel mode current process = 0 (em0 taskq) 2) em0: watchdog timeout -- resetting Fatal trap 9: general protection fault while in kernel mode current process = 1219 (slapd) 3) em0: discard frame w/o packet header panic: sbdrop I'm scratching my head about the #2 above - I don't think trap#9 is usual.
On 02/25/10 01:23, Ivan Voras wrote:> Ivan Voras wrote: >> I have a fairly recent 8-stable machine running under VMWare ESXi 3.5 >> (amd64 guest), which apparently crashes every few days from the same >> causes: >> >> em0: discard frame w/o packet header >> em0: discard frame w/o packet header >> em0: discard frame w/o packet header >> Panic string: sbsndptr: sockbuf 0xffffff007cca8c20 and mbuf >> 0xffffff00490a6400 clashing > > In case someone is interested or has an idea - on this machine I have > multiple crashed cores with similarily strange problems all connected > with networking and/or the em driver:... It looks like the most probable culprit are stf (6to4) support and/or something dealing with stf routing (the machine was a stf gateway for a small subnet). When disabled, the crashes stop.