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fuzz: add fuzzer for parsing .link files

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This also renames load_link() to link_load_one()
This commit is contained in:
Yu Watanabe 2019-02-22 14:28:08 +09:00
parent 7cd1f60df0
commit a378400b3f
4 changed files with 40 additions and 4 deletions
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11
src/udev/meson.build
View File

@ -197,3 +197,14 @@ configure_file(
meson.add_install_script('sh', '-c',
mkdir_p.format(join_paths(sysconfdir, 'udev/rules.d')))
fuzzers += [
[['src/udev/net/fuzz-link-parser.c',
'src/fuzz/fuzz.h'],
[libudev_core,
libudev_static,
libsystemd_network,
libshared],
[threads,
libacl]]
]

25
src/udev/net/fuzz-link-parser.c Normal file
View File

@ -0,0 +1,25 @@
/* SPDX-License-Identifier: LGPL-2.1+ */
#include "fd-util.h"
#include "fs-util.h"
#include "fuzz.h"
#include "link-config.h"
#include "tmpfile-util.h"
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
_cleanup_(link_config_ctx_freep) link_config_ctx *ctx = NULL;
_cleanup_(unlink_tempfilep) char filename[] = "/tmp/fuzz-link-config.XXXXXX";
_cleanup_fclose_ FILE *f = NULL;
if (!getenv("SYSTEMD_LOG_LEVEL"))
log_set_max_level(LOG_CRIT);
assert_se(fmkostemp_safe(filename, "r+", &f) == 0);
if (size != 0)
assert_se(fwrite(data, size, 1, f) == 1);
fflush(f);
assert_se(link_config_ctx_new(&ctx) >= 0);
(void) link_load_one(ctx, filename);
return 0;
}

6
src/udev/net/link-config.c
View File

@ -94,8 +94,6 @@ void link_config_ctx_free(link_config_ctx *ctx) {
return;
}
DEFINE_TRIVIAL_CLEANUP_FUNC(link_config_ctx*, link_config_ctx_free);
int link_config_ctx_new(link_config_ctx **ret) {
_cleanup_(link_config_ctx_freep) link_config_ctx *ctx = NULL;
@ -117,7 +115,7 @@ int link_config_ctx_new(link_config_ctx **ret) {
return 0;
}
static int load_link(link_config_ctx *ctx, const char *filename) {
int link_load_one(link_config_ctx *ctx, const char *filename) {
_cleanup_(link_config_freep) link_config *link = NULL;
_cleanup_fclose_ FILE *file = NULL;
_cleanup_free_ char *name = NULL;
@ -224,7 +222,7 @@ int link_config_load(link_config_ctx *ctx) {
return log_error_errno(r, "failed to enumerate link files: %m");
STRV_FOREACH_BACKWARDS(f, files) {
r = load_link(ctx, *f);
r = link_load_one(ctx, *f);
if (r < 0)
log_error_errno(r, "Failed to load %s, ignoring: %m", *f);
}

2
src/udev/net/link-config.h
View File

@ -67,7 +67,9 @@ struct link_config {
int link_config_ctx_new(link_config_ctx **ret);
void link_config_ctx_free(link_config_ctx *ctx);
DEFINE_TRIVIAL_CLEANUP_FUNC(link_config_ctx*, link_config_ctx_free);
int link_load_one(link_config_ctx *ctx, const char *filename);
int link_config_load(link_config_ctx *ctx);
bool link_config_should_reload(link_config_ctx *ctx);