linux-kernel - [RFC][PATCH -mm] Fix taskstats size calculation (use the new genetlink utility functions)

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-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20060911074032.26844.3566.sendpatchset@localhost.localdomain>
Date:	Mon, 11 Sep 2006 13:10:32 +0530
From:	Balbir Singh <balbir@...ibm.com>
To:	akpm@...l.org
Cc:	Balbir Singh <balbir@...ibm.com>, Jamal Hadi <hadi@...erus.ca>,
	Thomas Graf <tgraf@...g.ch>, netdev@...r.kernel.org,
	Shailabh Nagar <nagar@...son.ibm.com>,
	linux-kernel@...r.kernel.org
Subject: [RFC][PATCH -mm] Fix taskstats size calculation (use the new genetlink utility functions)



The addition of the CSA patch pushed the size of struct taskstats to 256
bytes. This exposed a problem with prepare_reply(), we were not allocating
space for the netlink and genetlink header. It worked earlier because
alloc_skb() would align the skb to SMP_CACHE_BYTES, which added some additonal
bytes.

Signed-off-by: Balbir Singh <balbir@...ibm.com>
---

 kernel/taskstats.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -puN kernel/taskstats.c~taskstats-fix-msg-size kernel/taskstats.c
--- linux-2.6.18-rc6/kernel/taskstats.c~taskstats-fix-msg-size	2006-09-11 11:42:40.000000000 +0530
+++ linux-2.6.18-rc6-balbir/kernel/taskstats.c	2006-09-11 11:42:55.000000000 +0530
@@ -77,7 +77,7 @@ static int prepare_reply(struct genl_inf
 	/*
 	 * If new attributes are added, please revisit this allocation
 	 */
-	skb = nlmsg_new(size, GFP_KERNEL);
+	skb = nlmsg_new(genlmsg_total_size(size), GFP_KERNEL);
 	if (!skb)
 		return -ENOMEM;
 
_

-- 

	Balbir Singh,
	Linux Technology Center,
	IBM Software Labs
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/