From: Gary Lin glin@suse.com
stable inclusion from stable-5.10.50 commit fc2ea819b96efe25b4af369bfbbc885c0c485bf7 bugzilla: 174522 https://gitee.com/openeuler/kernel/issues/I4DNFY
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit a196fa78a26571359740f701cf30d774eb8a72cb ]
Per the kmsg document [0], if we don't specify the log level with a prefix "<N>" in the message string, the default log level will be applied to the message. Since the default level could be warning(4), this would make the log utility such as journalctl treat the message, "Started bpfilter", as a warning. To avoid confusion, this commit adds the prefix "<5>" to make the message always a notice.
[0] https://www.kernel.org/doc/Documentation/ABI/testing/dev-kmsg
Fixes: 36c4357c63f3 ("net: bpfilter: print umh messages to /dev/kmsg") Reported-by: Martin Loviska mloviska@suse.com Signed-off-by: Gary Lin glin@suse.com Signed-off-by: Daniel Borkmann daniel@iogearbox.net Acked-by: Dmitrii Banshchikov me@ubique.spb.ru Link: https://lore.kernel.org/bpf/20210623040918.8683-1-glin@suse.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com Signed-off-by: Chen Jun chenjun102@huawei.com --- net/bpfilter/main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/bpfilter/main.c b/net/bpfilter/main.c index 05e1cfc1e5cd..291a92546246 100644 --- a/net/bpfilter/main.c +++ b/net/bpfilter/main.c @@ -57,7 +57,7 @@ int main(void) { debug_f = fopen("/dev/kmsg", "w"); setvbuf(debug_f, 0, _IOLBF, 0); - fprintf(debug_f, "Started bpfilter\n"); + fprintf(debug_f, "<5>Started bpfilter\n"); loop(); fclose(debug_f); return 0;