From ec2ab4bc695981aac49a33317c9d8b541f2babd1 Mon Sep 17 00:00:00 2001 From: Michal Schmidt Date: Mon, 2 Jun 2014 18:25:02 +0200 Subject: netlink: rate-limit leftover bytes warning and print process name [ 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 Signed-off-by: David S. Miller Signed-off-by: Jiri Slaby --- lib/nlattr.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/lib/nlattr.c b/lib/nlattr.c index fc6754720ce..10ad042d01b 100644 --- a/lib/nlattr.c +++ b/lib/nlattr.c @@ -201,8 +201,8 @@ int nla_parse(struct nlattr **tb, int maxtype, const struct nlattr *head, } 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: -- cgit v1.2.3-18-g5258