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| author | Mikulas Patocka <mpatocka@redhat.com> | 2023-01-22 20:03:31 +0100 |
|---|---|---|
| committer | Mike Snitzer <snitzer@kernel.org> | 2023-02-01 17:35:30 +0100 |
| commit | 8eb29c4fbf9661e6bd4dd86197a37ffe0ecc9d50 (patch) | |
| tree | 2dbe9302f36506cf8d632053d813ad9b427d45cc | |
| parent | dm flakey: don't corrupt the zero page (diff) | |
| download | linux-8eb29c4fbf9661e6bd4dd86197a37ffe0ecc9d50.tar.xz linux-8eb29c4fbf9661e6bd4dd86197a37ffe0ecc9d50.zip | |
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 <mpatocka@redhat.com>
Reviewed-by: Sweet Tea Dorminy <sweettea-kernel@dorminy.me>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
| -rw-r--r-- | drivers/md/dm-flakey.c | 3 |
1 files changed, 2 insertions, 1 deletions
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, |