linux-kernel - [PATCH][next] bnxt_en: ensure len is ininitialized to zero

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20180112174633.28719-1-colin.king@canonical.com>
Date:   Fri, 12 Jan 2018 17:46:33 +0000
From:   Colin King <colin.king@...onical.com>
To:     Michael Chan <michael.chan@...adcom.com>, netdev@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][next] bnxt_en: ensure len is ininitialized to zero

From: Colin Ian King <colin.king@...onical.com>

In the case where cmp_type == CMP_TYPE_RX_L2_TPA_START_CMP the
exit return path is via label next_rx_no_prod and cpr->rx_bytes
is being updated by an uninitialized value from len. Fix this by
initializing len to zero.

Detected by CoverityScan, CID#1463807 ("Uninitialized scalar variable")

Fixes: 6a8788f25625 ("bnxt_en: add support for software dynamic interrupt moderation")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index cf6ebf1e324b..5b5c4f266f1b 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -1482,7 +1482,7 @@ static int bnxt_rx_pkt(struct bnxt *bp, struct bnxt_napi *bnapi, u32 *raw_cons,
 	u32 tmp_raw_cons = *raw_cons;
 	u16 cfa_code, cons, prod, cp_cons = RING_CMP(tmp_raw_cons);
 	struct bnxt_sw_rx_bd *rx_buf;
-	unsigned int len;
+	unsigned int len = 0;
 	u8 *data_ptr, agg_bufs, cmp_type;
 	dma_addr_t dma_addr;
 	struct sk_buff *skb;
-- 
2.15.1