From: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
Date: Tue, 10 May 2022 09:55:37 +0000 (+0200)
Subject: fuzz-bootspec: limit input size
X-Git-Tag: v251-rc3~22
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=82544241bade82d0740378fa099d0d6c3dcfaeb0;p=thirdparty%2Fsystemd.git

fuzz-bootspec: limit input size

https://oss-fuzz.com/testcase-detail/5680508182331392 has the
first timeout with 811kb of input. As in the other cases, the code
is known to be slow with lots of repeated entries and we're fine with
that.
---

diff --git a/src/fuzz/fuzz-bootspec.c b/src/fuzz/fuzz-bootspec.c
index b59e67c24e3..fa9e3f06e04 100644
--- a/src/fuzz/fuzz-bootspec.c
+++ b/src/fuzz/fuzz-bootspec.c
@@ -84,6 +84,9 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
         _cleanup_(boot_config_free) BootConfig config = BOOT_CONFIG_NULL;
         int r;
 
+        if (size > 65535)
+                return 0;
+
         /* Disable most logging if not running standalone */
         if (!getenv("SYSTEMD_LOG_LEVEL"))
                 log_set_max_level(LOG_CRIT);
diff --git a/src/fuzz/fuzz-bootspec.options b/src/fuzz/fuzz-bootspec.options
new file mode 100644
index 00000000000..0824b19fab4
--- /dev/null
+++ b/src/fuzz/fuzz-bootspec.options
@@ -0,0 +1,2 @@
+[libfuzzer]
+max_len = 65535