On 9/30/22 13:25, Tadeusz Struk wrote:
Syzbot reported an issue with ext4 extents. The reproducer creates a corrupted ext4 fs image in memory, and mounts it as a loop device. It invokes the ext4_cache_extents() and ext4_find_extent(), which eventually triggers a BUG() in ext4_es_end() causing a kernel crash. It triggers on mainline, and every kernel version back to v4.14. Add a call ext4_ext_check_inode() in ext4_find_extent() to prevent the crash. To: "Theodore Ts'o"<tytso@xxxxxxx> Cc: "Andreas Dilger"<adilger.kernel@xxxxxxxxx> Cc:<linux-ext4@xxxxxxxxxxxxxxx> Cc:<linux-kernel@xxxxxxxxxxxxxxx> Cc:<stable@xxxxxxxxxxxxxxx> Link:https://syzkaller.appspot.com/bug?id=641e7a4b900015c5d7a729d6cc1fba7a928a88f9 Reported-by:syzbot+a22dc4b0744ac658ed9b@xxxxxxxxxxxxxxxxxxxxxxxxx Signed-off-by: Tadeusz Struk<tadeusz.struk@xxxxxxxxxx>
Hi, Any comments/feedback on this one? -- Thanks, Tadeusz
