On 03/30, Oleg Nesterov wrote: > > On 03/30, Al Viro wrote: > > > > On Mon, Mar 30, 2009 at 02:08:43AM +0100, Al Viro wrote: > > > > > So... > > > * check_unsafe_exec() locks current->fs shared, goes through all > > > threads comparing their ->fs with our, if the number doesn't match - bail > > > out. Otherwise we mark it "under exec". > > Unless I missed something again, check_unsafe_exec() should check "under exec" > after it takes fs->lock. If set - we are racing with sub-thread, return -EAGAIN. > > We can't proceed. If that another exec() fails, it will clear "under exec" at > the end of do_execve(), before we kill other threads. Or we need a counter to mark/unmark. Oleg. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
