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Message-ID: <7bd60e6d-4b33-4a04-998b-0be163a6fdb0@linux.ibm.com>
Date: Tue, 2 Sep 2025 12:10:01 +0530
From: Mahanta Jambigi <mjambigi@...ux.ibm.com>
To: James Flowers <bold.zone2373@...tmail.com>, alibuda@...ux.alibaba.com,
dust.li@...ux.alibaba.com, sidraya@...ux.ibm.com, wenjia@...ux.ibm.com,
tonylu@...ux.alibaba.com, guwen@...ux.alibaba.com, davem@...emloft.net,
edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
horms@...nel.org, skhan@...uxfoundation.org
Cc: 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: Re: [PATCH v2] net/smc: Replace use of strncpy on NUL-terminated
string with strscpy
On 01/09/25 8:34 am, James Flowers wrote:
> 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);
I tested your changes by creating a Software PNET ID using *smc_pnet*
tool & it works fine. Your changes are similar to ae2402b(net/smc:
replace strncpy with strscpy) commit.
Reviewed-by: Mahanta Jambigi <mjambigi@...ux.ibm.com>
> new_pe->ib_port = ib_port;
>
> new_ibdev = true;
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