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@mit.edu Cc: "Andreas Dilger"adilger.kernel@dilger.ca Cc:linux-ext4@vger.kernel.org Cc:linux-kernel@vger.kernel.org Cc:stable@vger.kernel.org
Link:https://syzkaller.appspot.com/bug?id=641e7a4b900015c5d7a729d6cc1fba7a928a88f... Reported-by:syzbot+a22dc4b0744ac658ed9b@syzkaller.appspotmail.com Signed-off-by: Tadeusz Struktadeusz.struk@linaro.org
Hi, Any comments/feedback on this one?