diff options
author | Chris Mason <clm@fb.com> | 2015-10-13 14:06:48 -0400 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-10-27 09:51:54 +0900 |
commit | 6780e0d1b043cad12625e0cb293b8d2ce5e39973 (patch) | |
tree | 06558edd858da43ca44528f343ad962670da042b /arch | |
parent | 2382a147ed804d66fbfd1c1c97b88bc5f15c49db (diff) |
btrfs: fix use after free iterating extrefs
commit dc6c5fb3b514221f2e9d21ee626a9d95d3418dff upstream.
The code for btrfs inode-resolve has never worked properly for
files with enough hard links to trigger extrefs. It was trying to
get the leaf out of a path after freeing the path:
btrfs_release_path(path);
leaf = path->nodes[0];
item_size = btrfs_item_size_nr(leaf, slot);
The fix here is to use the extent buffer we cloned just a little higher
up to avoid deadlocks caused by using the leaf in the path.
Signed-off-by: Chris Mason <clm@fb.com>
cc: Mark Fasheh <mfasheh@suse.de>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions