diff --git a/fs/smb/client/cifssmb.c b/fs/smb/client/cifssmb.c
index 1f77512252e7..f5aad5f61dce 100644
--- a/fs/smb/client/cifssmb.c
+++ b/fs/smb/client/cifssmb.c
@@ -615,6 +615,11 @@ CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
 		tcon->tid = smb_buffer_response->Tid;
 		bcc_ptr = pByteArea(smb_buffer_response);
 		bytes_left = get_bcc(smb_buffer_response);
+		if (bytes_left < 2) {
+			rc = smb_EIO2(smb_eio_trace_tcon_bcc_too_small,
+				      bytes_left, 2);
+			goto out;
+		}
 		length = strnlen(bcc_ptr, bytes_left - 2);
 		if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
 			is_unicode = true;
@@ -670,6 +675,7 @@ CIFSTCon(const unsigned int xid, struct cifs_ses *ses,
 			reset_cifs_unix_caps(xid, tcon, NULL, NULL);
 		}
 	}
+out:
 	cifs_buf_release(smb_buffer);
 	return rc;
 }
diff --git a/fs/smb/client/trace.h b/fs/smb/client/trace.h
index 5b21ad3c15fb..12241abb8e2e 100644
--- a/fs/smb/client/trace.h
+++ b/fs/smb/client/trace.h
@@ -133,6 +133,7 @@
 	EM(smb_eio_trace_sym_slash,			"sym_slash") \
 	EM(smb_eio_trace_sym_target_len,		"sym_target_len") \
 	EM(smb_eio_trace_symlink_file_size,		"symlink_file_size") \
+	EM(smb_eio_trace_tcon_bcc_too_small,		"tcon_bcc_too_small") \
 	EM(smb_eio_trace_tdis_in_reconnect,		"tdis_in_reconnect") \
 	EM(smb_eio_trace_tx_chained_async,		"tx_chained_async") \
 	EM(smb_eio_trace_tx_compress_failed,		"tx_compress_failed") \
@@ -213,7 +214,7 @@
 #define EM(a, b) a,
 #define E_(a, b) a
 
-enum smb_eio_trace		{ smb_eio_traces } __mode(byte);
+enum smb_eio_trace		{ smb_eio_traces };
 enum smb3_rw_credits_trace	{ smb3_rw_credits_traces } __mode(byte);
 enum smb3_tcon_ref_trace	{ smb3_tcon_ref_traces } __mode(byte);