diff options
| author | Paulo Alcantara <pc@manguebit.com> | 2024-01-30 03:04:44 +0300 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2024-02-01 21:15:51 +0300 |
| commit | 11d4d1dba3315f73d2d1d386f5bf4811a8241d45 (patch) | |
| tree | 895581c1b90b00b98e249951732d451aaed6e8c9 /fs | |
| parent | 6aac002bcfd554aff6d3ebb55e1660d078d70ab0 (diff) | |
| download | linux-11d4d1dba3315f73d2d1d386f5bf4811a8241d45.tar.xz | |
smb: client: increase number of PDUs allowed in a compound request
With the introduction of SMB2_OP_QUERY_WSL_EA, the client may now send
5 commands in a single compound request in order to query xattrs from
potential WSL reparse points, which should be fine as we currently
allow up to 5 PDUs in a single compound request. However, if
encryption is enabled (e.g. 'seal' mount option) or enforced by the
server, current MAX_COMPOUND(5) won't be enough as we require an extra
PDU for the transform header.
Fix this by increasing MAX_COMPOUND to 7 and, while we're at it, add
an WARN_ON_ONCE() and return -EIO instead of -ENOMEM in case we
attempt to send a compound request that couldn't include the extra
transform header.
Signed-off-by: Paulo Alcantara <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/smb/client/cifsglob.h | 2 | ||||
| -rw-r--r-- | fs/smb/client/transport.c | 4 |
2 files changed, 3 insertions, 3 deletions
diff --git a/fs/smb/client/cifsglob.h b/fs/smb/client/cifsglob.h index 9093c507042f..c86a72c9d9ec 100644 --- a/fs/smb/client/cifsglob.h +++ b/fs/smb/client/cifsglob.h @@ -87,7 +87,7 @@ #define SMB_INTERFACE_POLL_INTERVAL 600 /* maximum number of PDUs in one compound */ -#define MAX_COMPOUND 5 +#define MAX_COMPOUND 7 /* * Default number of credits to keep available for SMB3. diff --git a/fs/smb/client/transport.c b/fs/smb/client/transport.c index e00278fcfa4f..994d70193432 100644 --- a/fs/smb/client/transport.c +++ b/fs/smb/client/transport.c @@ -435,8 +435,8 @@ smb_send_rqst(struct TCP_Server_Info *server, int num_rqst, if (!(flags & CIFS_TRANSFORM_REQ)) return __smb_send_rqst(server, num_rqst, rqst); - if (num_rqst > MAX_COMPOUND - 1) - return -ENOMEM; + if (WARN_ON_ONCE(num_rqst > MAX_COMPOUND - 1)) + return -EIO; if (!server->ops->init_transform_rq) { cifs_server_dbg(VFS, "Encryption requested but transform callback is missing\n"); |