From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 4 Jul 2018 09:52:36 +0000 (+0300)
Subject: qed: off by one in qed_parse_mcp_trace_buf()
X-Git-Tag: v4.17.19~132
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=412a5ef3396406d1312d4494c7dffce9687f5259;p=thirdparty%2Fkernel%2Fstable.git

qed: off by one in qed_parse_mcp_trace_buf()

[ Upstream commit 0df8adbb88db8283f102a2afa91610a502245cb2 ]

If format_idx == s_mcp_trace_meta.formats_num then we read one element
beyond the end of the s_mcp_trace_meta.formats[] array.

Fixes: 50bc60cb155c ("qed*: Utilize FW 8.33.11.0")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Tomer Tayar <Tomer.Tayar@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/net/ethernet/qlogic/qed/qed_debug.c b/drivers/net/ethernet/qlogic/qed/qed_debug.c
index 4926c5532fbaa..13641096a0025 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_debug.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_debug.c
@@ -6663,7 +6663,7 @@ static enum dbg_status qed_parse_mcp_trace_buf(u8 *trace_buf,
 		format_idx = header & MFW_TRACE_EVENTID_MASK;
 
 		/* Skip message if its index doesn't exist in the meta data */
-		if (format_idx > s_mcp_trace_meta.formats_num) {
+		if (format_idx >= s_mcp_trace_meta.formats_num) {
 			u8 format_size =
 				(u8)((header & MFW_TRACE_PRM_SIZE_MASK) >>
 				     MFW_TRACE_PRM_SIZE_SHIFT);