From 8eb29c4fbf9661e6bd4dd86197a37ffe0ecc9d50 Mon Sep 17 00:00:00 2001 From: Mikulas Patocka Date: Sun, 22 Jan 2023 14:03:31 -0500 Subject: dm flakey: fix a bug with 32-bit highmem systems The function page_address does not work with 32-bit systems with high memory. Use bvec_kmap_local/kunmap_local instead. Cc: stable@vger.kernel.org Signed-off-by: Mikulas Patocka Reviewed-by: Sweet Tea Dorminy Signed-off-by: Mike Snitzer --- drivers/md/dm-flakey.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/md/dm-flakey.c b/drivers/md/dm-flakey.c index ff9ca5b2a47e..33608d436cec 100644 --- a/drivers/md/dm-flakey.c +++ b/drivers/md/dm-flakey.c @@ -307,8 +307,9 @@ static void corrupt_bio_data(struct bio *bio, struct flakey_c *fc) struct page *page = bio_iter_page(bio, iter); if (unlikely(page == ZERO_PAGE(0))) break; - segment = (page_address(page) + bio_iter_offset(bio, iter)); + segment = bvec_kmap_local(&bvec); segment[corrupt_bio_byte] = fc->corrupt_bio_value; + kunmap_local(segment); DMDEBUG("Corrupting data bio=%p by writing %u to byte %u " "(rw=%c bi_opf=%u bi_sector=%llu size=%u)\n", bio, fc->corrupt_bio_value, fc->corrupt_bio_byte, -- cgit v1.2.3