Messages in this thread Patch in this message | | | From | zhangyue <> | Subject | [PATCH] xfs: fix the problem that the array may be out of bound | Date | Fri, 19 Nov 2021 16:17:58 +0800 |
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In function 'xfs_btree_delrec()', if all data in array 'cur->bc_ptrs[level]' is 0, the 'level' may be greater than or equal to 'XFS_BTREE_MAXLEVELS'.
At this time, the array may be out of bound.
Signed-off-by: zhangyue <zhangyue1@kylinos.cn> --- fs/xfs/libxfs/xfs_btree.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/fs/xfs/libxfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c index bbdae2b4559f..fe66d1adc169 100644 --- a/fs/xfs/libxfs/xfs_btree.c +++ b/fs/xfs/libxfs/xfs_btree.c @@ -3694,6 +3694,9 @@ xfs_btree_delrec( tcur = NULL; /* Get the index of the entry being deleted, check for nothing there. */ + if (level >= XFS_BTREE_MAXLEVELS) + return -EFSCORRUPTED; + ptr = cur->bc_ptrs[level]; if (ptr == 0) { *stat = 0; -- 2.30.0
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