diff options
| author | Mikulas Patocka <mpatocka@redhat.com> | 2023-01-22 14:03:56 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-11 16:44:04 +0100 |
| commit | a2be4225c31df10c038f8a1bfd8ef55200414ef2 (patch) | |
| tree | 66296a2928a096af2bbe9ed927069e6781c95a73 /drivers/md | |
| parent | 64fbe39232edcaf0ee6a4a920246309797d1b02a (diff) | |
dm flakey: fix logic when corrupting a bio
commit aa56b9b75996ff4c76a0a4181c2fa0206c3d91cc upstream.
If "corrupt_bio_byte" is set to corrupt reads and corrupt_bio_flags is
used, dm-flakey would erroneously return all writes as errors. Likewise,
if "corrupt_bio_byte" is set to corrupt writes, dm-flakey would return
errors for all reads.
Fix the logic so that if fc->corrupt_bio_byte is non-zero, dm-flakey
will not abort reads on writes with an error.
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>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm-flakey.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/drivers/md/dm-flakey.c b/drivers/md/dm-flakey.c index 2900fbde89b3..38fc76e25b1b 100644 --- a/drivers/md/dm-flakey.c +++ b/drivers/md/dm-flakey.c @@ -360,9 +360,11 @@ static int flakey_map(struct dm_target *ti, struct bio *bio) /* * Corrupt matching writes. */ - if (fc->corrupt_bio_byte && (fc->corrupt_bio_rw == WRITE)) { - if (all_corrupt_bio_flags_match(bio, fc)) - corrupt_bio_data(bio, fc); + if (fc->corrupt_bio_byte) { + if (fc->corrupt_bio_rw == WRITE) { + if (all_corrupt_bio_flags_match(bio, fc)) + corrupt_bio_data(bio, fc); + } goto map_bio; } @@ -388,13 +390,14 @@ static int flakey_end_io(struct dm_target *ti, struct bio *bio, return DM_ENDIO_DONE; if (!*error && pb->bio_submitted && (bio_data_dir(bio) == READ)) { - if (fc->corrupt_bio_byte && (fc->corrupt_bio_rw == READ) && - all_corrupt_bio_flags_match(bio, fc)) { - /* - * Corrupt successful matching READs while in down state. - */ - corrupt_bio_data(bio, fc); - + if (fc->corrupt_bio_byte) { + if ((fc->corrupt_bio_rw == READ) && + all_corrupt_bio_flags_match(bio, fc)) { + /* + * Corrupt successful matching READs while in down state. + */ + corrupt_bio_data(bio, fc); + } } else if (!test_bit(DROP_WRITES, &fc->flags) && !test_bit(ERROR_WRITES, &fc->flags)) { /* |