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dm-crypt: don't update io->sector after kcryptd_crypt_write_io_submit()

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commit 9fdbbdbbc92b1474a87b89f8b964892a63734492 upstream.

The updates of io->sector are the leftovers when dm-crypt allocated
pages for partial write request. However, since commit cf2f1abfbd0db
("dm crypt: don't allocate pages for a partial request"), there is no
partial request anymore.

After the introduction of write request rb-tree, the updates of
io->sectors may interfere the insertion procedure, because ->sectors of
these write requests which have already been added in the rb-tree may be
changed during the insertion of new write request.

Fix it by removing these buggy updates of io->sectors. Considering these
updates only effect the write request rb-tree, the commit which
introduces the write request rb-tree is used as the fix tag.

Fixes: b3c5fd305249 ("dm crypt: sort writes")
Cc: stable@vger.kernel.org
Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hou Tao 2025-01-20 16:29:49 +08:00 committed by Greg Kroah-Hartman
parent 3a43f1d99b
commit eaf019088c
1 changed files with 3 additions and 11 deletions
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14
drivers/md/dm-crypt.c
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@ -2029,7 +2029,6 @@ static void kcryptd_crypt_write_continue(struct work_struct *work)
struct crypt_config *cc = io->cc;
struct convert_context *ctx = &io->ctx;
int crypt_finished;
sector_t sector = io->sector;
blk_status_t r;
wait_for_completion(&ctx->restart);
@ -2046,10 +2045,8 @@ static void kcryptd_crypt_write_continue(struct work_struct *work)
}
/* Encryption was already finished, submit io now */
if (crypt_finished) {
if (crypt_finished)
kcryptd_crypt_write_io_submit(io, 0);
io->sector = sector;
}
crypt_dec_pending(io);
}
@ -2060,14 +2057,13 @@ static void kcryptd_crypt_write_convert(struct dm_crypt_io *io)
struct convert_context *ctx = &io->ctx;
struct bio *clone;
int crypt_finished;
sector_t sector = io->sector;
blk_status_t r;
/*
* Prevent io from disappearing until this function completes.
*/
crypt_inc_pending(io);
crypt_convert_init(cc, ctx, NULL, io->base_bio, sector);
crypt_convert_init(cc, ctx, NULL, io->base_bio, io->sector);
clone = crypt_alloc_buffer(io, io->base_bio->bi_iter.bi_size);
if (unlikely(!clone)) {
@ -2084,8 +2080,6 @@ static void kcryptd_crypt_write_convert(struct dm_crypt_io *io)
io->ctx.iter_in = clone->bi_iter;
}
sector += bio_sectors(clone);
crypt_inc_pending(io);
r = crypt_convert(cc, ctx,
test_bit(DM_CRYPT_NO_WRITE_WORKQUEUE, &cc->flags), true);
@ -2109,10 +2103,8 @@ static void kcryptd_crypt_write_convert(struct dm_crypt_io *io)
}
/* Encryption was already finished, submit io now */
if (crypt_finished) {
if (crypt_finished)
kcryptd_crypt_write_io_submit(io, 0);
io->sector = sector;
}
dec:
crypt_dec_pending(io);