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 <mschmidt@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -201,8 +201,8 @@ int nla_parse(struct nlattr **tb, int maxtype, const struct nlattr *head,
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}
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if (unlikely(rem > 0))
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printk(KERN_WARNING "netlink: %d bytes leftover after parsing "
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"attributes.\n", rem);
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pr_warn_ratelimited("netlink: %d bytes leftover after parsing attributes in process `%s'.\n",
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rem, current->comm);
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err = 0;
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errout:
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