On 8/26/20 10:39 AM, Darrick J. Wong wrote: > From: Darrick J. Wong <darrick.wong@xxxxxxxxxx> > > Don't leak kernel memory contents into the shortform attr fork. > > Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> > --- > v2: memset instead of setting padding by hand yeah I think that's good. Reviewed-by: Eric Sandeen <sandeen@xxxxxxxxxx> > --- > fs/xfs/libxfs/xfs_attr_leaf.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/fs/xfs/libxfs/xfs_attr_leaf.c b/fs/xfs/libxfs/xfs_attr_leaf.c > index 8623c815164a..e730586bff85 100644 > --- a/fs/xfs/libxfs/xfs_attr_leaf.c > +++ b/fs/xfs/libxfs/xfs_attr_leaf.c > @@ -653,8 +653,8 @@ xfs_attr_shortform_create( > 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); > } >
