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| author | Quentin Casasnovas <quentin.casasnovas@oracle.com> | 2015-03-03 16:31:38 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-18 13:31:27 +0100 |
| commit | de9b1dd6e7696f385b12c1a3c862c1c72214bf31 (patch) | |
| tree | a816ca5bb66046893a57d2b2334298010d32cc8a | |
| parent | 93014d588bb73e95025705f4c64bbf0bf84d70a9 (diff) | |
| download | lwn-de9b1dd6e7696f385b12c1a3c862c1c72214bf31.tar.gz lwn-de9b1dd6e7696f385b12c1a3c862c1c72214bf31.zip | |
Btrfs:__add_inode_ref: out of bounds memory read when looking for extended ref.
commit dd9ef135e3542ffc621c4eb7f0091870ec7a1504 upstream.
Improper arithmetics when calculting the address of the extended ref could
lead to an out of bounds memory read and kernel panic.
Signed-off-by: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/btrfs/tree-log.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index aeb57b98c53f..a7f32bfdd5e7 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -979,7 +979,7 @@ again: base = btrfs_item_ptr_offset(leaf, path->slots[0]); while (cur_offset < item_size) { - extref = (struct btrfs_inode_extref *)base + cur_offset; + extref = (struct btrfs_inode_extref *)(base + cur_offset); victim_name_len = btrfs_inode_extref_name_len(leaf, extref); |