log: don't create directories for fuzz builds

Fixes: #3730
Fixes: https://github.com/google/oss-fuzz/issues/5509
Suggested-by: Evgeny Vereshchagin <evvers@ya.ru>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

diff --git a/src/lxc/log.c b/src/lxc/log.c
index e1473603a629b2deea5bce970da79759dbe549e4..90a56e26a1b718f943e4c35f0b8803f8bd0910b7 100644 (file)
--- a/src/lxc/log.c
+++ b/src/lxc/log.c
@@ -502,7 +502,11 @@ static int build_dir(const char *name)
                        continue;
                *p = '\0';
 
+#ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
                ret = lxc_unpriv(mkdir(n, 0755));
+#else
+               ret = errno = EEXIST;
+#endif /*!FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION */
                *p = '/';
                if (ret && errno != EEXIST)
                        return log_error_errno(-errno, errno, "Failed to create directory \"%s\"", n);