From: Gary Lin glin@suse.com
[ 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 --- 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;