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-rw-r--r--fs/xfs/libxfs/xfs_bmap.c2
-rw-r--r--fs/xfs/libxfs/xfs_types.c25
-rw-r--r--fs/xfs/libxfs/xfs_types.h3
-rw-r--r--fs/xfs/scrub/bmap.c4
-rw-r--r--fs/xfs/xfs_bmap_item.c2
-rw-r--r--fs/xfs/xfs_inode.c2
-rw-r--r--fs/xfs/xfs_rmap_item.c2
-rw-r--r--fs/xfs/xfs_super.c2
8 files changed, 37 insertions, 5 deletions
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index 7bcf498ef6b2..dcf56bcafb8f 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -6227,7 +6227,7 @@ xfs_bmap_validate_extent(
{
struct xfs_mount *mp = ip->i_mount;
- if (irec->br_startoff + irec->br_blockcount <= irec->br_startoff)
+ if (!xfs_verify_fileext(mp, irec->br_startoff, irec->br_blockcount))
return __this_address;
if (XFS_IS_REALTIME_INODE(ip) && whichfork == XFS_DATA_FORK) {
diff --git a/fs/xfs/libxfs/xfs_types.c b/fs/xfs/libxfs/xfs_types.c
index 7b310eb296b7..b254fbeaaa50 100644
--- a/fs/xfs/libxfs/xfs_types.c
+++ b/fs/xfs/libxfs/xfs_types.c
@@ -258,3 +258,28 @@ xfs_verify_dablk(
return dabno <= max_dablk;
}
+
+/* Check that a file block offset does not exceed the maximum. */
+bool
+xfs_verify_fileoff(
+ struct xfs_mount *mp,
+ xfs_fileoff_t off)
+{
+ return off <= XFS_MAX_FILEOFF;
+}
+
+/* Check that a range of file block offsets do not exceed the maximum. */
+bool
+xfs_verify_fileext(
+ struct xfs_mount *mp,
+ xfs_fileoff_t off,
+ xfs_fileoff_t len)
+{
+ if (off + len <= off)
+ return false;
+
+ if (!xfs_verify_fileoff(mp, off))
+ return false;
+
+ return xfs_verify_fileoff(mp, off + len - 1);
+}
diff --git a/fs/xfs/libxfs/xfs_types.h b/fs/xfs/libxfs/xfs_types.h
index 18e83ce46568..064bd6e8c922 100644
--- a/fs/xfs/libxfs/xfs_types.h
+++ b/fs/xfs/libxfs/xfs_types.h
@@ -203,5 +203,8 @@ bool xfs_verify_icount(struct xfs_mount *mp, unsigned long long icount);
bool xfs_verify_dablk(struct xfs_mount *mp, xfs_fileoff_t off);
void xfs_icount_range(struct xfs_mount *mp, unsigned long long *min,
unsigned long long *max);
+bool xfs_verify_fileoff(struct xfs_mount *mp, xfs_fileoff_t off);
+bool xfs_verify_fileext(struct xfs_mount *mp, xfs_fileoff_t off,
+ xfs_fileoff_t len);
#endif /* __XFS_TYPES_H__ */
diff --git a/fs/xfs/scrub/bmap.c b/fs/xfs/scrub/bmap.c
index cce8ac7d3973..bce4421acdb9 100644
--- a/fs/xfs/scrub/bmap.c
+++ b/fs/xfs/scrub/bmap.c
@@ -329,6 +329,10 @@ xchk_bmap_iextent(
xchk_fblock_set_corrupt(info->sc, info->whichfork,
irec->br_startoff);
+ if (!xfs_verify_fileext(mp, irec->br_startoff, irec->br_blockcount))
+ xchk_fblock_set_corrupt(info->sc, info->whichfork,
+ irec->br_startoff);
+
xchk_bmap_dirattr_extent(ip, info, irec);
/* There should never be a "hole" extent in either extent list. */
diff --git a/fs/xfs/xfs_bmap_item.c b/fs/xfs/xfs_bmap_item.c
index 659bde22c505..93e4d8ae6e92 100644
--- a/fs/xfs/xfs_bmap_item.c
+++ b/fs/xfs/xfs_bmap_item.c
@@ -445,7 +445,7 @@ xfs_bui_validate(
if (!xfs_verify_ino(mp, bmap->me_owner))
return false;
- if (bmap->me_startoff + bmap->me_len <= bmap->me_startoff)
+ if (!xfs_verify_fileext(mp, bmap->me_startoff, bmap->me_len))
return false;
return xfs_verify_fsbext(mp, bmap->me_startblock, bmap->me_len);
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 2bfbcf28b1bd..004fce3646ae 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1521,7 +1521,7 @@ xfs_itruncate_extents_flags(
* the page cache can't scale that far.
*/
first_unmap_block = XFS_B_TO_FSB(mp, (xfs_ufsize_t)new_size);
- if (first_unmap_block >= XFS_MAX_FILEOFF) {
+ if (!xfs_verify_fileoff(mp, first_unmap_block)) {
WARN_ON_ONCE(first_unmap_block > XFS_MAX_FILEOFF);
return 0;
}
diff --git a/fs/xfs/xfs_rmap_item.c b/fs/xfs/xfs_rmap_item.c
index 4fa875237422..49cebd68b672 100644
--- a/fs/xfs/xfs_rmap_item.c
+++ b/fs/xfs/xfs_rmap_item.c
@@ -490,7 +490,7 @@ xfs_rui_validate_map(
!xfs_verify_ino(mp, rmap->me_owner))
return false;
- if (rmap->me_startoff + rmap->me_len <= rmap->me_startoff)
+ if (!xfs_verify_fileext(mp, rmap->me_startoff, rmap->me_len))
return false;
return xfs_verify_fsbext(mp, rmap->me_startblock, rmap->me_len);
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 36002f460d7c..e1668491cee7 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1517,7 +1517,7 @@ xfs_fc_fill_super(
* Avoid integer overflow by comparing the maximum bmbt offset to the
* maximum pagecache offset in units of fs blocks.
*/
- if (XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE) > XFS_MAX_FILEOFF) {
+ if (!xfs_verify_fileoff(mp, XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE))) {
xfs_warn(mp,
"MAX_LFS_FILESIZE block offset (%llu) exceeds extent map maximum (%llu)!",
XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE),