Messages in this thread | | | Date | Tue, 11 Oct 2022 11:38:37 -0700 | Subject | Re: [PATCH] ext4: Add extend check to prevent BUG() in ext4_es_end | From | Tadeusz Struk <> |
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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=641e7a4b900015c5d7a729d6cc1fba7a928a88f9 > Reported-by:syzbot+a22dc4b0744ac658ed9b@syzkaller.appspotmail.com > Signed-off-by: Tadeusz Struk<tadeusz.struk@linaro.org>
Hi, Any comments/feedback on this one?
-- Thanks, Tadeusz
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