3.2.61-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Michal Schmidt <mschmidt@xxxxxxxxxx>
[ 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@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
lib/nlattr.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/lib/nlattr.c
+++ b/lib/nlattr.c
@@ -12,6 +12,7 @@
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/string.h>
+#include <linux/ratelimit.h>
#include <linux/types.h>
#include <net/netlink.h>
@@ -197,8 +198,8 @@ 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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