From: Christoph Hellwig <hch@lst.de>
Date: Fri, 30 Aug 2024 22:36:54 +0000 (-0700)
Subject: xfs: assert a valid limit in xfs_rtfind_forw
X-Git-Tag: v6.12-rc1~138^2~24^2~7
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=6d2db12d56a389b3e8efa236976f8dc3a8ae00f0;p=thirdparty%2Fkernel%2Flinux.git

xfs: assert a valid limit in xfs_rtfind_forw

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>
---

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.
 	 */