diff options
Diffstat (limited to 'executor')
| -rw-r--r-- | executor/executor_bsd.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/executor/executor_bsd.h b/executor/executor_bsd.h index d3ef16bce..65617d6b1 100644 --- a/executor/executor_bsd.h +++ b/executor/executor_bsd.h @@ -26,7 +26,13 @@ static void os_init(int argc, char** argv, void* data, size_t data_size) int prot = PROT_READ | PROT_WRITE | PROT_EXEC; #endif - if (mmap(data, data_size, prot, MAP_ANON | MAP_PRIVATE | MAP_FIXED, -1, 0) != data) + int flags = MAP_ANON | MAP_PRIVATE | MAP_FIXED; +#if GOOS_freebsd + // Fail closed if the chosen data offset conflicts with an existing mapping. + flags |= MAP_EXCL; +#endif + + if (mmap(data, data_size, prot, flags, -1, 0) != data) fail("mmap of data segment failed"); // Makes sure the file descriptor limit is sufficient to map control pipes. |