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rnbd-srv: Zero the rsp buffer before using it

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[ Upstream commit 69d26698e4 ]

Before using the data buffer to send back the response message, zero it
completely. This prevents any stray bytes to be picked up by the client
side when there the message is exchanged between different protocol
versions.

Signed-off-by: Md Haris Iqbal <haris.iqbal@ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Grzegorz Prajsner <grzegorz.prajsner@ionos.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Md Haris Iqbal
2026-03-04 07:19:34 -05:00
committed by Sasha Levin
parent fd51d47fca
commit c94ede3c43
1 changed files with 3 additions and 0 deletions
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drivers/block/rnbd/rnbd-srv.c
+3
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@@ -551,6 +551,8 @@ static void rnbd_srv_fill_msg_open_rsp(struct rnbd_msg_open_rsp *rsp,
{
struct block_device *bdev = file_bdev(sess_dev->bdev_file);
memset(rsp, 0, sizeof(*rsp));
rsp->hdr.type = cpu_to_le16(RNBD_MSG_OPEN_RSP);
rsp->device_id = cpu_to_le32(sess_dev->device_id);
rsp->nsectors = cpu_to_le64(bdev_nr_sectors(bdev));
@@ -657,6 +659,7 @@ static void process_msg_sess_info(struct rnbd_srv_session *srv_sess,
trace_process_msg_sess_info(srv_sess, sess_info_msg);
memset(rsp, 0, sizeof(*rsp));
rsp->hdr.type = cpu_to_le16(RNBD_MSG_SESS_INFO_RSP);
rsp->ver = srv_sess->ver;
}