On Wed, May 09, 2018 at 07:35:04PM +0900, Tetsuo Handa wrote: > syzbot is reporting too large memory allocation at bfs_fill_super() [1]. > Since file system image is corrupted such that bfs_sb->s_start == 0, > bfs_fill_super() is trying to allocate 8MB of continuous memory. Fix this > by adding a sanity check on bfs_sb->s_start, __GFP_NOWARN and printf(). > > [1] https://syzkaller.appspot.com/bug?id=16a87c236b951351374a84c8a32f40edbc034e96 Looking at that C reproducer, it looks like it's trying to fuzz filesystem images: https://syzkaller.appspot.com/text?tag=ReproC&x=15b834a7800000 Do we really want this? I was under the impression that we simply do not care about attackers who have control of the media, and having syzbot generate thousands of bugs that nobody will work on is not a good use of anybody's time.
