On Tue, Nov 13, 2012 at 03:50:50PM +0100, Oleg Nesterov wrote: > This doesn't look right. > > The problem is, the current locking is broken, ->siglock can not serialize > ->sigmask changes. Just suppose the the child inherits sigfd from parent > and they both do sys_signalfd4() at the same time. > > Nothing really bad can happen, that is why nobody bothers to fix this. > But this patch makes the thing worse, write_seqcount_begin() must be > serialized correctly.
Thanks a lot, Oleg! I'll update. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
