File xfsprogs-xfs-refactor-short-form-directory-structure-verifier.patch of Package xfsprogs.21555
From 590ec7c1de3f8fa708fef15d23c0787f0125e93d Mon Sep 17 00:00:00 2001
From: "Darrick J. Wong" <darrick.wong@oracle.com>
Date: Mon, 26 Feb 2018 22:43:17 -0600
Subject: [PATCH] xfs: refactor short form directory structure verifier
function
Git-commit: 1f98251ffd56f2d78fff582568e984dec952d89c
Patch-mainline: v4.16.0-rc1
References: bsc#1158504
Source kernel commit: dc042c2d8ff629dd411e9a60bce9c379e2f8aaf8
Change the short form directory structure verifier function to return
the instruction pointer of a failing check or NULL if everything's ok.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Acked-by: Anthony Iliopoulos <ailiopoulos@suse.com>
---
libxfs/xfs_dir2_priv.h | 2 +-
libxfs/xfs_dir2_sf.c | 26 +++++++++++++-------------
libxfs/xfs_inode_fork.c | 5 ++---
3 files changed, 16 insertions(+), 17 deletions(-)
diff --git a/libxfs/xfs_dir2_priv.h b/libxfs/xfs_dir2_priv.h
index 4badd26..1fca1c2 100644
--- a/libxfs/xfs_dir2_priv.h
+++ b/libxfs/xfs_dir2_priv.h
@@ -127,7 +127,7 @@ extern int xfs_dir2_sf_create(struct xfs_da_args *args, xfs_ino_t pino);
extern int xfs_dir2_sf_lookup(struct xfs_da_args *args);
extern int xfs_dir2_sf_removename(struct xfs_da_args *args);
extern int xfs_dir2_sf_replace(struct xfs_da_args *args);
-extern int xfs_dir2_sf_verify(struct xfs_inode *ip);
+extern xfs_failaddr_t xfs_dir2_sf_verify(struct xfs_inode *ip);
/* xfs_dir2_readdir.c */
extern int xfs_readdir(struct xfs_trans *tp, struct xfs_inode *dp,
diff --git a/libxfs/xfs_dir2_sf.c b/libxfs/xfs_dir2_sf.c
index 0c45398..cf352b6 100644
--- a/libxfs/xfs_dir2_sf.c
+++ b/libxfs/xfs_dir2_sf.c
@@ -628,7 +628,7 @@ xfs_dir2_sf_check(
#endif /* DEBUG */
/* Verify the consistency of an inline directory. */
-int
+xfs_failaddr_t
xfs_dir2_sf_verify(
struct xfs_inode *ip)
{
@@ -663,7 +663,7 @@ xfs_dir2_sf_verify(
*/
if (size <= offsetof(struct xfs_dir2_sf_hdr, parent) ||
size < xfs_dir2_sf_hdr_size(sfp->i8count))
- return -EFSCORRUPTED;
+ return __this_address;
endp = (char *)sfp + size;
@@ -672,7 +672,7 @@ xfs_dir2_sf_verify(
i8count = ino > XFS_DIR2_MAX_SHORT_INUM;
error = xfs_dir_ino_validate(mp, ino);
if (error)
- return error;
+ return __this_address;
offset = dops->data_first_offset;
/* Check all reported entries */
@@ -684,11 +684,11 @@ xfs_dir2_sf_verify(
* within the data buffer.
*/
if (((char *)sfep + sizeof(*sfep)) >= endp)
- return -EFSCORRUPTED;
+ return __this_address;
/* Don't allow names with known bad length. */
if (sfep->namelen == 0)
- return -EFSCORRUPTED;
+ return __this_address;
/*
* Check that the variable-length part of the structure is
@@ -697,23 +697,23 @@ xfs_dir2_sf_verify(
*/
next_sfep = dops->sf_nextentry(sfp, sfep);
if (endp < (char *)next_sfep)
- return -EFSCORRUPTED;
+ return __this_address;
/* Check that the offsets always increase. */
if (xfs_dir2_sf_get_offset(sfep) < offset)
- return -EFSCORRUPTED;
+ return __this_address;
/* Check the inode number. */
ino = dops->sf_get_ino(sfp, sfep);
i8count += ino > XFS_DIR2_MAX_SHORT_INUM;
error = xfs_dir_ino_validate(mp, ino);
if (error)
- return error;
+ return __this_address;
/* Check the file type. */
filetype = dops->sf_get_ftype(sfep);
if (filetype >= XFS_DIR3_FT_MAX)
- return -EFSCORRUPTED;
+ return __this_address;
offset = xfs_dir2_sf_get_offset(sfep) +
dops->data_entsize(sfep->namelen);
@@ -721,16 +721,16 @@ xfs_dir2_sf_verify(
sfep = next_sfep;
}
if (i8count != sfp->i8count)
- return -EFSCORRUPTED;
+ return __this_address;
if ((void *)sfep != (void *)endp)
- return -EFSCORRUPTED;
+ return __this_address;
/* Make sure this whole thing ought to be in local format. */
if (offset + (sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t) +
(uint)sizeof(xfs_dir2_block_tail_t) > mp->m_dir_geo->blksize)
- return -EFSCORRUPTED;
+ return __this_address;
- return 0;
+ return NULL;
}
/*
diff --git a/libxfs/xfs_inode_fork.c b/libxfs/xfs_inode_fork.c
index 3c0be58..b2bd8c7 100644
--- a/libxfs/xfs_inode_fork.c
+++ b/libxfs/xfs_inode_fork.c
@@ -182,10 +182,9 @@ xfs_iformat_fork(
/* Check inline dir contents. */
if (S_ISDIR(inode->i_mode) && dip->di_format == XFS_DINODE_FMT_LOCAL) {
- error = xfs_dir2_sf_verify(ip);
- if (error) {
+ if (xfs_dir2_sf_verify(ip)) {
xfs_idestroy_fork(ip, XFS_DATA_FORK);
- return error;
+ return -EFSCORRUPTED;
}
}
--
2.16.4