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| author | Namjae Jeon <linkinjeon@kernel.org> | 2023-11-07 21:04:31 +0900 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2023-11-07 18:54:25 -0600 |
| commit | 5a5409d90bd05f87fe5623a749ccfbf3f7c7d400 (patch) | |
| tree | f39eaec78fe1e2fcc08124bcd140fe83cf3a6716 | |
| parent | f6049712e520287ad695e9d4f1572ab76807fa0c (diff) | |
| download | wpan-5a5409d90bd05f87fe5623a749ccfbf3f7c7d400.tar.gz | |
ksmbd: handle malformed smb1 message
If set_smb1_rsp_status() is not implemented, It will cause NULL pointer
dereferece error when client send malformed smb1 message.
This patch add set_smb1_rsp_status() to ignore malformed smb1 message.
Cc: stable@vger.kernel.org
Reported-by: Robert Morris <rtm@csail.mit.edu>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
| -rw-r--r-- | fs/smb/server/smb_common.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/smb/server/smb_common.c b/fs/smb/server/smb_common.c index e6ba1e9b8589aa..6691ae68af0c09 100644 --- a/fs/smb/server/smb_common.c +++ b/fs/smb/server/smb_common.c @@ -366,11 +366,22 @@ static int smb1_allocate_rsp_buf(struct ksmbd_work *work) return 0; } +/** + * set_smb1_rsp_status() - set error type in smb response header + * @work: smb work containing smb response header + * @err: error code to set in response + */ +static void set_smb1_rsp_status(struct ksmbd_work *work, __le32 err) +{ + work->send_no_response = 1; +} + static struct smb_version_ops smb1_server_ops = { .get_cmd_val = get_smb1_cmd_val, .init_rsp_hdr = init_smb1_rsp_hdr, .allocate_rsp_buf = smb1_allocate_rsp_buf, .check_user_session = smb1_check_user_session, + .set_rsp_status = set_smb1_rsp_status, }; static int smb1_negotiate(struct ksmbd_work *work) |