linux-kernel - [PATCH] drivers/firewire: use struct

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: <20220128080336.1211525-1-chi.minghao@zte.com.cn>
Date:   Fri, 28 Jan 2022 08:03:36 +0000
From:   cgel.zte@...il.com
To:     stefanr@...6.in-berlin.de
Cc:     linux1394-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, Minghao Chi <chi.minghao@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: [PATCH] drivers/firewire: use struct_size over open coded arithmetic

From: Minghao Chi (CGEL ZTE) <chi.minghao@....com.cn>

Replace zero-length array with flexible-array member and make use
of the struct_size() helper in kmalloc(). For example:

struct fw_request {
	...
	u32 data[];
}

Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes.

Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Minghao Chi (CGEL ZTE) <chi.minghao@....com.cn>
---
 drivers/firewire/core-transaction.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/firewire/core-transaction.c b/drivers/firewire/core-transaction.c
index ac487c96bb71..2e9dd988ed0e 100644
--- a/drivers/firewire/core-transaction.c
+++ b/drivers/firewire/core-transaction.c
@@ -777,7 +777,7 @@ static struct fw_request *allocate_request(struct fw_card *card,
 		return NULL;
 	}
 
-	request = kmalloc(sizeof(*request) + length, GFP_ATOMIC);
+	request = kmalloc(struct_size(*request, data, length), GFP_ATOMIC);
 	if (request == NULL)
 		return NULL;
 
-- 
2.25.1