Hi, there's a nasty problem with the ipt_owner netfilter code: It does a spin_lock(&files->file_lock), sometimes from softirq context. This can lead to deadlocks on SMP systems. The lock must not be taken from softirq context because the rest of the kernel doesn't use spin_lock_bh. On a UP machine (that had an SMP compiled kernel) the machine repeatedly locked up after approx. five minutes. SysRQ shows backtraces like fput -> timer interrupt -> softirq -> ipv4 -> netfilter -> ipt_owner -> hang. I don't see a clean solution for this (except for changing all the spin_locks to spin_lock_bhs which I think is way too aggressive). Any ideas? - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
