commit 29b3dd1c054e8dda464c046c701d6946f53434fa Author: George Kadianakis desnacked@riseup.net Date: Thu Aug 3 13:24:50 2017 +0300

Fix 32-bit bug when writing address to descriptor.

We used to sizeof() a pointer. Let's just use asprintf to avoid having to be smart. --- src/or/hs_service.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/src/or/hs_service.c b/src/or/hs_service.c index 6fa714e5e..30f693108 100644 --- a/src/or/hs_service.c +++ b/src/or/hs_service.c @@ -62,9 +62,9 @@ #define FOR_EACH_DESCRIPTOR_END } STMT_END ;

/* Onion service directory file names. */ -static const char *fname_keyfile_prefix = "hs_ed25519"; -static const char *fname_hostname = "hostname"; -static const char *address_tld = "onion"; +static const char fname_keyfile_prefix[] = "hs_ed25519"; +static const char fname_hostname[] = "hostname"; +static const char address_tld[] = "onion";

/* Staging list of service object. When configuring service, we add them to * this list considered a staging area and they will get added to our global @@ -817,20 +817,17 @@ write_address_to_file(const hs_service_t *service, const char *fname_) { int ret = -1; char *fname = NULL; - /* Length of an address plus the sizeof the address tld (onion) which counts - * the NUL terminated byte so we keep it for the "." and the newline. */ - char buf[HS_SERVICE_ADDR_LEN_BASE32 + sizeof(address_tld) + 1]; + char *addr_buf = NULL;

tor_assert(service); tor_assert(fname_);

/* Construct the full address with the onion tld and write the hostname file * to disk. */ - tor_snprintf(buf, sizeof(buf), "%s.%s\n", service->onion_address, - address_tld); + tor_asprintf(&addr_buf, "%s.%s\n", service->onion_address, address_tld); /* Notice here that we use the given "fname_". */ fname = hs_path_from_filename(service->config.directory_path, fname_); - if (write_str_to_file(fname, buf, 0) < 0) { + if (write_str_to_file(fname, addr_buf, 0) < 0) { log_warn(LD_REND, "Could not write onion address to hostname file %s", escaped(fname)); goto end; @@ -850,6 +847,7 @@ write_address_to_file(const hs_service_t *service, const char *fname_) ret = 0; end: tor_free(fname); + tor_free(addr_buf); return ret; }