This is a note to let you know that I've just added the patch titled libxfs: readahead of dir3 data blocks should use the read verifier to the 4.2-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: libxfs-readahead-of-dir3-data-blocks-should-use-the-read-verifier.patch and it can be found in the queue-4.2 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 2f123bce18943fff819bc10f8868ffb9149fc622 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" <darrick.wong@xxxxxxxxxx> Date: Wed, 19 Aug 2015 10:33:58 +1000 Subject: libxfs: readahead of dir3 data blocks should use the read verifier From: "Darrick J. Wong" <darrick.wong@xxxxxxxxxx> commit 2f123bce18943fff819bc10f8868ffb9149fc622 upstream. In the dir3 data block readahead function, use the regular read verifier to check the block's CRC and spot-check the block contents instead of directly calling only the spot-checking routine. This prevents corrupted directory data blocks from being read into the kernel, which can lead to garbage ls output and directory loops (if say one of the entries contains slashes and other junk). Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> Reviewed-by: Dave Chinner <dchinner@xxxxxxxxxx> Signed-off-by: Dave Chinner <david@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/xfs/libxfs/xfs_dir2_data.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/fs/xfs/libxfs/xfs_dir2_data.c +++ b/fs/xfs/libxfs/xfs_dir2_data.c @@ -252,7 +252,8 @@ xfs_dir3_data_reada_verify( return; case cpu_to_be32(XFS_DIR2_DATA_MAGIC): case cpu_to_be32(XFS_DIR3_DATA_MAGIC): - xfs_dir3_data_verify(bp); + bp->b_ops = &xfs_dir3_data_buf_ops; + bp->b_ops->verify_read(bp); return; default: xfs_buf_ioerror(bp, -EFSCORRUPTED); Patches currently in stable-queue which might be from darrick.wong@xxxxxxxxxx are queue-4.2/libxfs-readahead-of-dir3-data-blocks-should-use-the-read-verifier.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html