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smb/server: fix minimum SMB2 PDU size

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The minimum SMB2 PDU size should be updated to the size of
`struct smb2_pdu` (that is, the size of `struct smb2_hdr` + 2).

Suggested-by: David Howells <dhowells@redhat.com>
Suggested-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Reviewed-by: David Howells <dhowells@redhat.com>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
ChenXiaoSong
2025-12-20 21:25:51 +08:00
committed by Steve French
parent 3b9c30eb8f
commit 4c7d8eb9a7
1 changed files with 2 additions and 2 deletions
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4
fs/smb/server/connection.c
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@@ -297,7 +297,7 @@ bool ksmbd_conn_alive(struct ksmbd_conn *conn)
/* "+2" for BCC field (ByteCount, 2 bytes) */
#define SMB1_MIN_SUPPORTED_PDU_SIZE (sizeof(struct smb_hdr) + 2)
#define SMB2_MIN_SUPPORTED_HEADER_SIZE (sizeof(struct smb2_hdr) + 4)
#define SMB2_MIN_SUPPORTED_PDU_SIZE (sizeof(struct smb2_pdu))
/**
* ksmbd_conn_handler_loop() - session thread to listen on new smb requests
@@ -397,7 +397,7 @@ int ksmbd_conn_handler_loop(void *p)
if (((struct smb2_hdr *)smb_get_msg(conn->request_buf))->ProtocolId ==
SMB2_PROTO_NUMBER) {
if (pdu_size < SMB2_MIN_SUPPORTED_HEADER_SIZE)
if (pdu_size < SMB2_MIN_SUPPORTED_PDU_SIZE)
break;
}