From: Pavel Shilovsky pshilov@microsoft.com
[ Upstream commit bb1bccb60c2ebd9a6f895507d1d48d5ed773814e ]
There are a couple places where we still account for 4 bytes in the beginning of SMB2 packet which is not true in the current code. Fix this to use a header preamble size where possible.
Signed-off-by: Pavel Shilovsky pshilov@microsoft.com Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/cifs/cifssmb.c | 7 ++++--- fs/cifs/smb2ops.c | 6 +++--- 2 files changed, 7 insertions(+), 6 deletions(-)
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 86a54b809c484..8b9471904f67e 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -1521,9 +1521,10 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid)
/* set up first two iov for signature check and to get credits */ rdata->iov[0].iov_base = buf; - rdata->iov[0].iov_len = 4; - rdata->iov[1].iov_base = buf + 4; - rdata->iov[1].iov_len = server->total_read - 4; + rdata->iov[0].iov_len = server->vals->header_preamble_size; + rdata->iov[1].iov_base = buf + server->vals->header_preamble_size; + rdata->iov[1].iov_len = + server->total_read - server->vals->header_preamble_size; cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", rdata->iov[0].iov_base, rdata->iov[0].iov_len); cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n", diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c index f0d966da7f378..6fc16329ceb45 100644 --- a/fs/cifs/smb2ops.c +++ b/fs/cifs/smb2ops.c @@ -3000,10 +3000,10 @@ handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
/* set up first two iov to get credits */ rdata->iov[0].iov_base = buf; - rdata->iov[0].iov_len = 4; - rdata->iov[1].iov_base = buf + 4; + rdata->iov[0].iov_len = 0; + rdata->iov[1].iov_base = buf; rdata->iov[1].iov_len = - min_t(unsigned int, buf_len, server->vals->read_rsp_size) - 4; + min_t(unsigned int, buf_len, server->vals->read_rsp_size); cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", rdata->iov[0].iov_base, rdata->iov[0].iov_len); cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",