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| author | Namjae Jeon <linkinjeon@kernel.org> | 2021-10-11 13:15:25 +0300 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2021-10-14 07:37:19 +0300 |
| commit | dbad63001eac3abeeb2b66ddf71504e8ab128c5c (patch) | |
| tree | 2fd6e5b6bef3eab9eab3820f0e226ae1aedc872e /fs/ksmbd | |
| parent | 9a63b999ae5435d82a5c353c6b1467100f857742 (diff) | |
| download | linux-dbad63001eac3abeeb2b66ddf71504e8ab128c5c.tar.xz | |
ksmbd: validate compound response buffer
Add the check to validate compound response buffer.
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/ksmbd')
| -rw-r--r-- | fs/ksmbd/smb2pdu.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index 7b4689f2df49..89c187aa8db2 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -449,6 +449,12 @@ bool is_chained_smb2_message(struct ksmbd_work *work) return false; } + if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE > + work->response_sz) { + pr_err("next response offset exceeds response buffer size\n"); + return false; + } + ksmbd_debug(SMB, "got SMB2 chained command\n"); init_chained_smb2_rsp(work); return true; |