commit 1d617e3ed0a6c380d1bde9654a518c8a83d21db3 Author: Nick Mathewson nickm@torproject.org Date: Mon Mar 27 10:40:15 2017 +0200

Check and cast st_size to size_t in storagedir code

This prevents an i386 compilation warning and fixes bug 21828. Bug not in any released Tor. --- src/common/storagedir.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/common/storagedir.c b/src/common/storagedir.c index b7d43dd..e28a66f 100644 --- a/src/common/storagedir.c +++ b/src/common/storagedir.c @@ -205,8 +205,11 @@ storage_dir_read(storage_dir_t *d, const char *fname, int bin, size_t *sz_out) tor_asprintf(&path, "%s/%s", d->directory, fname); struct stat st; char *contents = read_file_to_str(path, flags, &st); - if (contents && sz_out) - *sz_out = st.st_size; + if (contents && sz_out) { + // it fits in RAM, so we know its size is less than SIZE_MAX + tor_assert((uint64_t)st.st_size <= SIZE_MAX); + *sz_out = (size_t) st.st_size; + }

tor_free(path); return (uint8_t *) contents;