linux-kernel - [PATCH 4.17 193/324] qed: off by one in qed_parse_mcp_trace

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Message-Id: <20180823075005.821088772@linuxfoundation.org>
Date:   Thu, 23 Aug 2018 09:54:19 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Tomer Tayar <Tomer.Tayar@...ium.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.17 193/324] qed: off by one in qed_parse_mcp_trace_buf()

4.17-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@...cle.com>

[ 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@...cle.com>
Acked-by: Tomer Tayar <Tomer.Tayar@...ium.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/qlogic/qed/qed_debug.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 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_tra
 		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);