xfs_scrub: fix null pointer crash in scrub_render_ino_descr
Starting in Debian 13's libc6, passing a NULL format string to vsnprintf
causes the program to segfault. Prior to this, the null format string
would be ignored. Because @format is optional, let's explicitly steer
around the vsnprintf if there is no format string. Also tidy whitespace
in the comment.
Found by generic/45[34] on Debian 13.
Cc: linux-xfs@vger.kernel.org # v6.10.0
Fixes: 9a8b09762f9a52 ("xfs_scrub: use parent pointers when possible to report file operations")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Andrey Albershteyn <aalbersh@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
1 file changed
