diff options
Diffstat (limited to 'src/lib/err/backtrace.c')
| -rw-r--r-- | src/lib/err/backtrace.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/src/lib/err/backtrace.c b/src/lib/err/backtrace.c index a4d8269c6a..8606f42177 100644 --- a/src/lib/err/backtrace.c +++ b/src/lib/err/backtrace.c @@ -276,11 +276,23 @@ configure_backtrace_handler(const char *tor_version) char version[128] = "Tor\0"; if (tor_version) { - snprintf(version, sizeof(version), "Tor %s", tor_version); + int snp_rv = 0; + /* We can't use strlcat() here, because it is defined in + * string/compat_string.h on some platforms, and string uses torerr. */ + snp_rv = snprintf(version, sizeof(version), "Tor %s", tor_version); + /* It's safe to call raw_assert() here, because raw_assert() does not + * call configure_backtrace_handler(). */ + raw_assert(snp_rv < (int)sizeof(version)); + raw_assert(snp_rv >= 0); } - strncpy(bt_version, version, sizeof(bt_version) - 1); + char *str_rv = NULL; + /* We can't use strlcpy() here, see the note about strlcat() above. */ + str_rv = strncpy(bt_version, version, sizeof(bt_version) - 1); + /* We must terminate bt_version, then raw_assert(), because raw_assert() + * uses bt_version. */ bt_version[sizeof(bt_version) - 1] = 0; + raw_assert(str_rv == bt_version); return install_bt_handler(); } |