diff options
Diffstat (limited to 'src/common/compat.c')
| -rw-r--r-- | src/common/compat.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/common/compat.c b/src/common/compat.c index ebf05f59e1..0dbede6bed 100644 --- a/src/common/compat.c +++ b/src/common/compat.c @@ -258,6 +258,12 @@ tor_mmap_file(const char *filename) page_size = getpagesize(); size += (size%page_size) ? page_size-(size%page_size) : 0; + if (st.st_size > SSIZE_T_CEILING || (off_t)size < st.st_size) { + log_warn(LD_FS, "File \"%s\" is too large. Ignoring.",filename); + errno = EFBIG; + close(fd); + return NULL; + } if (!size) { /* Zero-length file. If we call mmap on it, it will succeed but * return NULL, and bad things will happen. So just fail. */ |