linux-kernel - [PATCH v2] net/smc: Replace use of strncpy on NUL-terminated string with strscpy

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Message-ID: <20250901030512.80099-1-bold.zone2373@fastmail.com>
Date: Sun, 31 Aug 2025 20:04:59 -0700
From: James Flowers <bold.zone2373@...tmail.com>
To: alibuda@...ux.alibaba.com,
	dust.li@...ux.alibaba.com,
	sidraya@...ux.ibm.com,
	wenjia@...ux.ibm.com,
	mjambigi@...ux.ibm.com,
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	edumazet@...gle.com,
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	pabeni@...hat.com,
	horms@...nel.org,
	skhan@...uxfoundation.org
Cc: James Flowers <bold.zone2373@...tmail.com>,
	linux-rdma@...r.kernel.org,
	linux-s390@...r.kernel.org,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-kernel-mentees@...ts.linux.dev
Subject: [PATCH v2] net/smc: Replace use of strncpy on NUL-terminated string with strscpy

strncpy is deprecated for use on NUL-terminated strings, as indicated in
Documentation/process/deprecated.rst. strncpy NUL-pads the destination
buffer and doesn't guarantee the destination buffer will be NUL
terminated.

Signed-off-by: James Flowers <bold.zone2373@...tmail.com>
---
V1 -> V2: Replaced with two argument version of strscpy
Note: this has only been compile tested.

 net/smc/smc_pnet.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/smc/smc_pnet.c b/net/smc/smc_pnet.c
index 76ad29e31d60..b90337f86e83 100644
--- a/net/smc/smc_pnet.c
+++ b/net/smc/smc_pnet.c
@@ -450,7 +450,7 @@ static int smc_pnet_add_ib(struct smc_pnettable *pnettable, char *ib_name,
 		return -ENOMEM;
 	new_pe->type = SMC_PNET_IB;
 	memcpy(new_pe->pnet_name, pnet_name, SMC_MAX_PNETID_LEN);
-	strncpy(new_pe->ib_name, ib_name, IB_DEVICE_NAME_MAX);
+	strscpy(new_pe->ib_name, ib_name);
 	new_pe->ib_port = ib_port;
 
 	new_ibdev = true;
-- 
2.50.1