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| author | Christoph Böhmwalder <christoph.boehmwalder@linbit.com> | 2023-09-06 15:30:34 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-09-06 15:33:03 +0200 |
| commit | 4b9c2edaf7282d60e069551b4b28abc2932cd3e3 (patch) | |
| tree | c7d7c9f7ae6d82b44a030ca7a3f82654898675ad /drivers/block/drbd/drbd_main.c | |
| parent | block: fix pin count management when merging same-page segments (diff) | |
| download | linux-4b9c2edaf7282d60e069551b4b28abc2932cd3e3.tar.xz linux-4b9c2edaf7282d60e069551b4b28abc2932cd3e3.zip | |
drbd: swap bvec_set_page len and offset
bvec_set_page has the following signature:
static inline void bvec_set_page(struct bio_vec *bv, struct page *page,
unsigned int len, unsigned int offset)
However, the usage in DRBD swaps the len and offset parameters. This
leads to a bvec with length=0 instead of the intended length=4096, which
causes sock_sendmsg to return -EIO.
This leaves DRBD unable to transmit any pages and thus completely
broken.
Swapping the parameters fixes the regression.
Fixes: eeac7405c735 ("drbd: Use sendmsg(MSG_SPLICE_PAGES) rather than sendpage()")
Reported-by: Serguei Ivantsov <manowar@gsc-game.com>
Link: https://lore.kernel.org/regressions/CAKH+VT3YLmAn0Y8=q37UTDShqxDLsqPcQ4hBMzY7HPn7zNx+RQ@mail.gmail.com/
Cc: stable@vger.kernel.org
Signed-off-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com>
Link: https://lore.kernel.org/r/20230906133034.948817-1-christoph.boehmwalder@linbit.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/drbd/drbd_main.c')
| -rw-r--r-- | drivers/block/drbd/drbd_main.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index 79ab532aabaf..6bc86106c7b2 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -1557,7 +1557,7 @@ static int _drbd_send_page(struct drbd_peer_device *peer_device, struct page *pa do { int sent; - bvec_set_page(&bvec, page, offset, len); + bvec_set_page(&bvec, page, len, offset); iov_iter_bvec(&msg.msg_iter, ITER_SOURCE, &bvec, 1, len); sent = sock_sendmsg(socket, &msg); |