From patchwork Wed Oct 23 12:15:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Horman X-Patchwork-Id: 13847005 X-Patchwork-Delegate: kuba@kernel.org Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EBA103FD4; Wed, 23 Oct 2024 12:15:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729685736; cv=none; b=Ohoe1lFMc27KARhyU9/G/h54O0qleHBpkd5VnfxV//RgnhqCksT4UY0FSnjgj1pr2UjI7PhGxDiCtSrrvmr3aful5kviT1N5jWACZ/bSnxWehuF0N4Sfvp2VL9JLsGEs4dJgPilnYKJUDpYBdVG2jSkrS1S6RWQGrHkOnuRLdc8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729685736; c=relaxed/simple; bh=zmEV7kzYjK4FvefIs+qoE3S15A9ktltXHDxx9f+lFC4=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=CN0vgTyKh57swy+GLHZIICsCt9iyl+9zSOOzVFWuguut80r6/rQndRrucow0UnwYeGtEqc5LaOUdsCIr1D6k9PN5/xJHVXpPP8Pv9VG8/D6dsZujDjLYxajDQqWsrRgHWSvGMku6iBnUCUHoebuFPynmPP9Kp21LjRTpaSviUxI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=QODBdm+u; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="QODBdm+u" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EC00AC4CEC6; Wed, 23 Oct 2024 12:15:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1729685735; bh=zmEV7kzYjK4FvefIs+qoE3S15A9ktltXHDxx9f+lFC4=; h=From:Date:Subject:To:Cc:From; b=QODBdm+uAODGHRZP2fHYKCDpUiFMbnIR8jUcCQmizxUAusYQc1tmjeYWYAsFzXOym ++m9Run639Zf6UKyq7evfoQ1MQauQWdwFpsjWDrFxMmcdxPvjg+gil/GPGJo74vhGW 8gSIrdVkxxH04j6r79S823gNXDAC6md7VaJ6lAI/XN63szTW7SEbeALCdhppa/G4+9 1WY4Fss7CwWgFG66jV7kM0MAPFHw0seW6Xhdknb4YdGaVVATMjhFPjz4WRrtYJlvq9 q24NdUlH9vOaClg8cc5aWz8LEfZ6kp7cRj2r8KMofUsbsSWHsY1mrQyHIMDTU/Ptbi MfEgIYmVAWMcw== From: Simon Horman Date: Wed, 23 Oct 2024 13:15:28 +0100 Subject: [PATCH net-next] wwan: core: Pass string literal as format argument of dev_set_name() Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241023-wwan-fmt-v1-1-521b39968639@kernel.org> X-B4-Tracking: v=1; b=H4sIAN/oGGcC/x3MwQpAQBCA4VfRnE2ZReJV5CBmmIOh3Q0l725z/ OrvfyCwVw7QZQ94PjXobgmUZzCtoy2MOieDK1xFhSvxukZD2SK2ROLKphahBlJ+eBa9/1UPxhG N7wjD+36j/2/XZAAAAA== To: Loic Poulain , Sergey Ryazanov , Johannes Berg Cc: Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , netdev@vger.kernel.org, llvm@lists.linux.dev X-Mailer: b4 0.14.0 X-Patchwork-Delegate: kuba@kernel.org Both gcc-14 and clang-18 report that passing a non-string literal as the format argument of dev_set_name() is potentially insecure. E.g. clang-18 says: drivers/net/wwan/wwan_core.c:442:34: warning: format string is not a string literal (potentially insecure) [-Wformat-security] 442 | return dev_set_name(&port->dev, buf); | ^~~ drivers/net/wwan/wwan_core.c:442:34: note: treat the string as an argument to avoid this 442 | return dev_set_name(&port->dev, buf); | ^ | "%s", It is always the case where the contents of mod is safe to pass as the format argument. That is, in my understanding, it never contains any format escape sequences. But, it seems better to be safe than sorry. And, as a bonus, compiler output becomes less verbose by addressing this issue as suggested by clang-18. Compile tested only. No functional change intended. Signed-off-by: Simon Horman --- drivers/net/wwan/wwan_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wwan/wwan_core.c b/drivers/net/wwan/wwan_core.c index 17431f1b1a0c..465e2a0d57a3 100644 --- a/drivers/net/wwan/wwan_core.c +++ b/drivers/net/wwan/wwan_core.c @@ -431,7 +431,7 @@ static int __wwan_port_dev_assign_name(struct wwan_port *port, const char *fmt) return -ENFILE; } - return dev_set_name(&port->dev, buf); + return dev_set_name(&port->dev, "%s", buf); } struct wwan_port *wwan_create_port(struct device *parent,