From: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
Date: Sun, 25 Mar 2018 20:11:44 +0000 (+0200)
Subject: fuzz-unit-file: adjust check for ListenNetlink yet again
X-Git-Tag: v239~470^2~6
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=483ed8a6a00a00fbd7ef76e304ee265131207ce8;p=thirdparty%2Fsystemd.git

fuzz-unit-file: adjust check for ListenNetlink yet again

The test for ListenNetlink would abort the loop if a line longer then LINE_MAX
was encountered (read_line() returns -ENOBUFS in that case). Let's use the
the line length limit that the unit file parses uses.

https://oss-fuzz.com/v2/issue/5546208027213824/7094.
---

diff --git a/src/fuzz/fuzz-unit-file.c b/src/fuzz/fuzz-unit-file.c
index 4865653f5bf..a5cd9b4aa9c 100644
--- a/src/fuzz/fuzz-unit-file.c
+++ b/src/fuzz/fuzz-unit-file.c
@@ -43,15 +43,17 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
                 _cleanup_free_ char *l = NULL;
                 const char *ll;
 
-                if (read_line(f, LINE_MAX, &l) <= 0)
+                if (read_line(f, LONG_LINE_MAX, &l) <= 0)
                         break;
 
                 ll = l + strspn(l, WHITESPACE);
 
-                if (startswith(ll, "ListenNetlink="))
+                if (startswith(ll, "ListenNetlink=")) {
                         /* ListenNetlink causes a false positive in msan,
                          * let's skip this for now. */
+                        log_notice("Skipping test because ListenNetlink= is present");
                         return 0;
+                }
         }
 
         assert_se(fseek(f, offset, SEEK_SET) == 0);