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Date:   Tue, 13 Aug 2019 22:09:59 -0400
From:   Sasha Levin <>
Cc:     Wang Xiayang <>,
        Marc Kleine-Budde <>,
        Sasha Levin <>,,
Subject: [PATCH AUTOSEL 5.2 075/123] can: sja1000: force the string buffer NULL-terminated

From: Wang Xiayang <>

[ Upstream commit cd28aa2e056cd1ea79fc5f24eed0ce868c6cab5c ]

strncpy() does not ensure NULL-termination when the input string size
equals to the destination buffer size IFNAMSIZ. The output string
'name' is passed to dev_info which relies on NULL-termination.

Use strlcpy() instead.

This issue is identified by a Coccinelle script.

Signed-off-by: Wang Xiayang <>
Signed-off-by: Marc Kleine-Budde <>
Signed-off-by: Sasha Levin <>
 drivers/net/can/sja1000/peak_pcmcia.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/can/sja1000/peak_pcmcia.c b/drivers/net/can/sja1000/peak_pcmcia.c
index 185c7f7d38a4a..5e0d5e8101c86 100644
--- a/drivers/net/can/sja1000/peak_pcmcia.c
+++ b/drivers/net/can/sja1000/peak_pcmcia.c
@@ -479,7 +479,7 @@ static void pcan_free_channels(struct pcan_pccard *card)
 		if (!netdev)
-		strncpy(name, netdev->name, IFNAMSIZ);
+		strlcpy(name, netdev->name, IFNAMSIZ);

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