diff options
| author | Darrick J. Wong <djwong@kernel.org> | 2024-04-16 00:54:40 +0300 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2024-04-16 00:58:52 +0300 |
| commit | cc6740ddb423db2066f7669eaaa377fdbf84ab1e (patch) | |
| tree | f8eedd4acae8e7895eec0b3f584943f0b705224b /fs/xfs/libxfs/xfs_dir2_data.c | |
| parent | 402eef10a1bab0b428c418cfbaaa0a62efc9c951 (diff) | |
| download | linux-cc6740ddb423db2066f7669eaaa377fdbf84ab1e.tar.xz | |
xfs: validate explicit directory data buffer owners
Port the existing directory data header checking function to accept an
owner number instead of an xfs_inode, then update the callsites to use
xfs_da_args.owner when possible.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/xfs/libxfs/xfs_dir2_data.c')
| -rw-r--r-- | fs/xfs/libxfs/xfs_dir2_data.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/fs/xfs/libxfs/xfs_dir2_data.c b/fs/xfs/libxfs/xfs_dir2_data.c index c3ef720b5ff6..ea0b9628df18 100644 --- a/fs/xfs/libxfs/xfs_dir2_data.c +++ b/fs/xfs/libxfs/xfs_dir2_data.c @@ -395,17 +395,20 @@ static const struct xfs_buf_ops xfs_dir3_data_reada_buf_ops = { .verify_write = xfs_dir3_data_write_verify, }; -static xfs_failaddr_t +xfs_failaddr_t xfs_dir3_data_header_check( - struct xfs_inode *dp, - struct xfs_buf *bp) + struct xfs_buf *bp, + xfs_ino_t owner) { - struct xfs_mount *mp = dp->i_mount; + struct xfs_mount *mp = bp->b_mount; if (xfs_has_crc(mp)) { struct xfs_dir3_data_hdr *hdr3 = bp->b_addr; - if (be64_to_cpu(hdr3->hdr.owner) != dp->i_ino) + if (hdr3->hdr.magic != cpu_to_be32(XFS_DIR3_DATA_MAGIC)) + return __this_address; + + if (be64_to_cpu(hdr3->hdr.owner) != owner) return __this_address; } @@ -416,6 +419,7 @@ int xfs_dir3_data_read( struct xfs_trans *tp, struct xfs_inode *dp, + xfs_ino_t owner, xfs_dablk_t bno, unsigned int flags, struct xfs_buf **bpp) @@ -429,7 +433,7 @@ xfs_dir3_data_read( return err; /* Check things that we can't do in the verifier. */ - fa = xfs_dir3_data_header_check(dp, *bpp); + fa = xfs_dir3_data_header_check(*bpp, owner); if (fa) { __xfs_buf_mark_corrupt(*bpp, fa); xfs_trans_brelse(tp, *bpp); |