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xfs: initialize the shortform attr header padding entry 

[ Upstream commit 125eac243806e021f33a1fdea3687eccbb9f7636 ]

Don't leak kernel memory contents into the shortform attr fork.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Darrick J. Wong 2020-08-26 14:12:18 -07:00 committed by Greg Kroah-Hartman
parent a33cab0fbd
commit 41ac2e8a6a
1 changed files with 2 additions and 2 deletions
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4
fs/xfs/libxfs/xfs_attr_leaf.c
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@ -583,8 +583,8 @@ xfs_attr_shortform_create(xfs_da_args_t *args)
ASSERT(ifp->if_flags & XFS_IFINLINE);
}
xfs_idata_realloc(dp, sizeof(*hdr), XFS_ATTR_FORK);
hdr = (xfs_attr_sf_hdr_t *)ifp->if_u1.if_data;
hdr->count = 0;
hdr = (struct xfs_attr_sf_hdr *)ifp->if_u1.if_data;
memset(hdr, 0, sizeof(*hdr));
hdr->totsize = cpu_to_be16(sizeof(*hdr));
xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_ADATA);
}