From: Michal Schmidt Date: Mon, 2 Jun 2014 16:25:02 +0000 (+0200) Subject: netlink: rate-limit leftover bytes warning and print process name X-Git-Tag: firefly_0821_release~176^2~3836^2~10 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=bfc5184b69cf9eeb286137640351c650c27f118a;p=firefly-linux-kernel-4.4.55.git netlink: rate-limit leftover bytes warning and print process name 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 --- diff --git a/lib/nlattr.c b/lib/nlattr.c index fc6754720ced..10ad042d01be 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: