From f23810da209d3fb4bde156a09a1fa93957c82a49 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= Date: Wed, 24 Jun 2020 13:26:05 +0200 Subject: [PATCH] fuzz-udev-rules: -ENOBUFS should be accepted too In udev_rules_load(), add a debug message. Otherwise there'd be no indication that parsing was aborted. --- src/fuzz/fuzz-udev-rules.c | 7 ++++++- src/udev/udev-rules.c | 7 +++++-- test/fuzz/fuzz-udev-rules/line-too-long | 1 + 3 files changed, 12 insertions(+), 3 deletions(-) create mode 100644 test/fuzz/fuzz-udev-rules/line-too-long diff --git a/src/fuzz/fuzz-udev-rules.c b/src/fuzz/fuzz-udev-rules.c index dd3c403ebb..7530d80bef 100644 --- a/src/fuzz/fuzz-udev-rules.c +++ b/src/fuzz/fuzz-udev-rules.c @@ -13,6 +13,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { _cleanup_(udev_rules_freep) UdevRules *rules = NULL; _cleanup_fclose_ FILE *f = NULL; _cleanup_(unlink_tempfilep) char filename[] = "/tmp/fuzz-udev-rules.XXXXXX"; + int r; if (!getenv("SYSTEMD_LOG_LEVEL")) { log_set_max_level_realm(LOG_REALM_UDEV, LOG_CRIT); @@ -25,7 +26,11 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { fflush(f); assert_se(rules = udev_rules_new(RESOLVE_NAME_EARLY)); - assert_se(udev_rules_parse_file(rules, filename) == 0); + r = udev_rules_parse_file(rules, filename); + log_info_errno(r, "Parsing %s: %m", filename); + assert_se(IN_SET(r, + 0, /* OK */ + -ENOBUFS /* line length exceeded */)); return 0; } diff --git a/src/udev/udev-rules.c b/src/udev/udev-rules.c index 95951bceef..4efafffd40 100644 --- a/src/udev/udev-rules.c +++ b/src/udev/udev-rules.c @@ -1308,8 +1308,11 @@ int udev_rules_load(UdevRules **ret_rules, ResolveNameTiming resolve_name_timing if (r < 0) return log_debug_errno(r, "Failed to enumerate rules files: %m"); - STRV_FOREACH(f, files) - (void) udev_rules_parse_file(rules, *f); + STRV_FOREACH(f, files) { + r = udev_rules_parse_file(rules, *f); + if (r < 0) + log_debug_errno(r, "Failed to read rules file %s, ignoring: %m", *f); + } *ret_rules = TAKE_PTR(rules); return 0; diff --git a/test/fuzz/fuzz-udev-rules/line-too-long b/test/fuzz/fuzz-udev-rules/line-too-long new file mode 100644 index 0000000000..c0b908dbb0 --- /dev/null +++ b/test/fuzz/fuzz-udev-rules/line-too-long @@ -0,0 +1 @@ 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