Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 3.10 27/62] Btrfs:__add_inode_ref: out of bounds memory read when looking for extended ref. | Date | Mon, 16 Mar 2015 15:09:44 +0100 |
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3.10-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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- fs/btrfs/tree-log.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -943,7 +943,7 @@ 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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