[PATCH net 3/4] selftests/tcp_ao: Fix fscanf() call for format-security

[Dmitry Safonov via B4 Relay]

From: Dmitry Safonov <0x7f454c46@xxxxxxxxx>

On my new laptop with packages from nixos-unstable, gcc 12.3.0 produces:
> lib/proc.c: In function ‘netstat_read_type’:
> lib/proc.c:89:9: error: format not a string literal and no format arguments [-Werror=format-security]
>    89 |         if (fscanf(fnetstat, type->header_name) == EOF)
>       |         ^~
> cc1: some warnings being treated as errors

Here the selftests lib parses header name, while expectes non-space word
ending with a column.

Fixes: cfbab37b3da0 ("selftests/net: Add TCP-AO library")
Signed-off-by: Dmitry Safonov <0x7f454c46@xxxxxxxxx>
---
 tools/testing/selftests/net/tcp_ao/lib/proc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/net/tcp_ao/lib/proc.c b/tools/testing/selftests/net/tcp_ao/lib/proc.c
index 2fb6dd8adba6..8b984fa04286 100644
--- a/tools/testing/selftests/net/tcp_ao/lib/proc.c
+++ b/tools/testing/selftests/net/tcp_ao/lib/proc.c
@@ -86,7 +86,7 @@ static void netstat_read_type(FILE *fnetstat, struct netstat **dest, char *line)
 
 	pos = strchr(line, ' ') + 1;
 
-	if (fscanf(fnetstat, type->header_name) == EOF)
+	if (fscanf(fnetstat, "%[^ :]", type->header_name) == EOF)
 		test_error("fscanf(%s)", type->header_name);
 	if (fread(&tmp, 1, 1, fnetstat) != 1 || tmp != ':')
 		test_error("Unexpected netstat format (%c)", tmp);

-- 
2.42.0