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(parent: d259a1b) | patch
btrfs: tree-checker: validate number of chunk stripes and parity
authorDaniel Xu <dxu@dxuuu.xyz>
Fri, 9 Oct 2020 01:09:10 +0000 (18:09 -0700)
committerDavid Sterba <dsterba@suse.com>
Mon, 26 Oct 2020 14:03:48 +0000 (15:03 +0100)
commitd371ce689faf6198aacced2777b9e81216170c6f
tree8b61245838e4906ee46098b550e1930eee222b7btree | snapshot
parentd259a1b56aeade05c7d0bdb7ef3d6f5fbf1f314ecommit | diff
btrfs: tree-checker: validate number of chunk stripes and parity

If there's no parity and num_stripes < ncopies, a crafted image can
trigger a division by zero in calc_stripe_length().

The image was generated through fuzzing.

CC: stable@vger.kernel.org # 5.4+
Reviewed-by: Qu Wenruo <wqu@suse.com>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=209587
Signed-off-by: Daniel Xu <dxu@dxuuu.xyz>
Signed-off-by: David Sterba <dsterba@suse.com>
fs/btrfs/tree-checker.c diff | blob | history
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