[PATCH 05/12] xfs: assert a valid limit in xfs_rtfind_forw

Darrick J. Wong
2024-08-23T00:10:14Z

From: Christoph Hellwig <hch@lst.de>

Protect against developers passing stupid limits when refactoring the
RT code once again.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
---
fs/xfs/libxfs/xfs_rtbitmap.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/fs/xfs/libxfs/xfs_rtbitmap.c b/fs/xfs/libxfs/xfs_rtbitmap.c
index 9feeefe539488..4de97c4e8ebdd 100644
--- a/fs/xfs/libxfs/xfs_rtbitmap.c
+++ b/fs/xfs/libxfs/xfs_rtbitmap.c
@@ -315,6 +315,8 @@ xfs_rtfind_forw(
xfs_rtword_t incore;
unsigned int word; /* word number in the buffer */

+ ASSERT(start <= limit);
+
/*
* Compute and read in starting bitmap block for starting block.
*/