From: Mikulas Patocka mpatocka@redhat.com
commit 8eb29c4fbf9661e6bd4dd86197a37ffe0ecc9d50 upstream.
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 mpatocka@redhat.com Reviewed-by: Sweet Tea Dorminy sweettea-kernel@dorminy.me Signed-off-by: Mike Snitzer snitzer@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/md/dm-flakey.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/md/dm-flakey.c +++ b/drivers/md/dm-flakey.c @@ -307,8 +307,9 @@ static void corrupt_bio_data(struct bio 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,