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Message-Id: <20140624154724.603756154@linuxfoundation.org>
Date: Tue, 24 Jun 2014 11:50:34 -0400
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Michal Schmidt <mschmidt@...hat.com>,
"David S. Miller" <davem@...emloft.net>
Subject: [PATCH 3.14 15/68] netlink: rate-limit leftover bytes warning and print process name
3.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Michal Schmidt <mschmidt@...hat.com>
[ Upstream commit bfc5184b69cf9eeb286137640351c650c27f118a ]
Any process is able to send netlink messages with leftover bytes.
Make the warning rate-limited to prevent too much log spam.
The warning is supposed to help find userspace bugs, so print the
triggering command name to implicate the buggy program.
[v2: Use pr_warn_ratelimited instead of printk_ratelimited.]
Signed-off-by: Michal Schmidt <mschmidt@...hat.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
lib/nlattr.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/lib/nlattr.c
+++ b/lib/nlattr.c
@@ -201,8 +201,8 @@ int nla_parse(struct nlattr **tb, int ma
}
if (unlikely(rem > 0))
- printk(KERN_WARNING "netlink: %d bytes leftover after parsing "
- "attributes.\n", rem);
+ pr_warn_ratelimited("netlink: %d bytes leftover after parsing attributes in process `%s'.\n",
+ rem, current->comm);
err = 0;
errout:
--
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