| From | Luis Henriques <> | Subject | [PATCH 3.16.y-ckt 086/165] Btrfs:__add_inode_ref: out of bounds memory read when looking for extended ref. | Date | Wed, 25 Mar 2015 14:00:59 +0000 |
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3.16.7-ckt9 -stable review patch. If anyone has any objections, please let me know.
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From: Quentin Casasnovas <quentin.casasnovas@oracle.com>
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: Luis Henriques <luis.henriques@canonical.com> --- fs/btrfs/tree-log.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 76bbe6557eb6..0a8194955e6b 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -1007,7 +1007,7 @@ 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);
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