diff options
Diffstat (limited to 'arch/sandbox/cpu/os.c')
| -rw-r--r-- | arch/sandbox/cpu/os.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c index 5e66304e2b9..9e93a0fa571 100644 --- a/arch/sandbox/cpu/os.c +++ b/arch/sandbox/cpu/os.c @@ -166,7 +166,7 @@ int os_write_file(const char *fname, const void *buf, int size) return 0; } -int os_filesize(int fd) +off_t os_filesize(int fd) { off_t size; @@ -218,7 +218,7 @@ err: int os_map_file(const char *pathname, int os_flags, void **bufp, int *sizep) { void *ptr; - int size; + off_t size; int ifd; ifd = os_open(pathname, os_flags); @@ -231,6 +231,10 @@ int os_map_file(const char *pathname, int os_flags, void **bufp, int *sizep) printf("Cannot get file size of '%s'\n", pathname); return -EIO; } + if ((unsigned long long)size > (unsigned long long)SIZE_MAX) { + printf("File '%s' too large to map\n", pathname); + return -EIO; + } ptr = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, ifd, 0); if (ptr == MAP_FAILED) { |