block: Don't invalidate pagecache for invalid falloc modes
commit 1364a3c3 upstream. Only call truncate_bdev_range() if the fallocate mode is supported. This fixes a bug where data in the pagecache could be invalidated if the fallocate() was called on the block device with an invalid mode. Fixes: 25f4c414 ("block: implement (some of) fallocate for block devices") Cc: stable@vger.kernel.org Reported-by:"Darrick J. Wong" <djwong@kernel.org> Signed-off-by:
Sarthak Kukreti <sarthakkukreti@chromium.org> Reviewed-by:
Christoph Hellwig <hch@lst.de> Reviewed-by:
"Darrick J. Wong" <djwong@kernel.org> Signed-off-by:
Mike Snitzer <snitzer@kernel.org> Fixes: line? I've never seen those wrapped. Link: https://lore.kernel.org/r/20231011201230.750105-1-sarthakkukreti@chromium.org Signed-off-by:
Jens Axboe <axboe@kernel.dk> Signed-off-by:
Sarthak Kukreti <sarthakkukreti@chromium.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parent
a0678f50
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