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authorChandan Babu R <chandanrlinux@gmail.com>2021-01-23 03:48:11 +0300
committerDarrick J. Wong <djwong@kernel.org>2021-01-23 03:54:47 +0300
commit727e1acd297cae15449607d6e2ee39c71216cf1a (patch)
tree3057407785005630e7d01a6a6ed491a5c31fdde8 /fs/xfs/xfs_bmap_item.c
parentb9b7e1dc56c5ca8d6fc37c410b054e9f26737d2e (diff)
downloadlinux-727e1acd297cae15449607d6e2ee39c71216cf1a.tar.xz
xfs: Check for extent overflow when trivally adding a new extent
When adding a new data extent (without modifying an inode's existing extents) the extent count increases only by 1. This commit checks for extent count overflow in such cases. Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Allison Henderson <allison.henderson@oracle.com> Signed-off-by: Chandan Babu R <chandanrlinux@gmail.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs/xfs_bmap_item.c')
-rw-r--r--fs/xfs/xfs_bmap_item.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/xfs/xfs_bmap_item.c b/fs/xfs/xfs_bmap_item.c
index 93e4d8ae6e92..0534304ed0a7 100644
--- a/fs/xfs/xfs_bmap_item.c
+++ b/fs/xfs/xfs_bmap_item.c
@@ -508,6 +508,13 @@ xfs_bui_item_recover(
xfs_ilock(ip, XFS_ILOCK_EXCL);
xfs_trans_ijoin(tp, ip, 0);
+ if (bui_type == XFS_BMAP_MAP) {
+ error = xfs_iext_count_may_overflow(ip, whichfork,
+ XFS_IEXT_ADD_NOSPLIT_CNT);
+ if (error)
+ goto err_cancel;
+ }
+
count = bmap->me_len;
error = xfs_trans_log_finish_bmap_update(tp, budp, bui_type, ip,
whichfork, bmap->me_startoff, bmap->me_startblock,