diff options
| author | Haoxiang Li <haoxiang_li2024@163.com> | 2025-02-17 15:20:38 +0800 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2025-02-20 12:10:39 -0600 |
| commit | 860ca5e50f73c2a1cef7eefc9d39d04e275417f7 (patch) | |
| tree | 215088b8f37ec0065d81d85357ae5df77816a8b6 | |
| parent | e9a8cac0bf895efe0bc7b11d174e8dae9b195da8 (diff) | |
smb: client: Add check for next_buffer in receive_encrypted_standard()
Add check for the return value of cifs_buf_get() and cifs_small_buf_get()
in receive_encrypted_standard() to prevent null pointer dereference.
Fixes: eec04ea11969 ("smb: client: fix OOB in receive_encrypted_standard()")
Cc: stable@vger.kernel.org
Signed-off-by: Haoxiang Li <haoxiang_li2024@163.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
| -rw-r--r-- | fs/smb/client/smb2ops.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c index 23e0c8be7fb5..4dd11eafb69d 100644 --- a/fs/smb/client/smb2ops.c +++ b/fs/smb/client/smb2ops.c @@ -4965,6 +4965,10 @@ one_more: next_buffer = (char *)cifs_buf_get(); else next_buffer = (char *)cifs_small_buf_get(); + if (!next_buffer) { + cifs_server_dbg(VFS, "No memory for (large) SMB response\n"); + return -1; + } memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd); } |