diff options
| -rw-r--r-- | executor/common_test.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/executor/common_test.h b/executor/common_test.h index f5f54d9ee..148f11f86 100644 --- a/executor/common_test.h +++ b/executor/common_test.h @@ -118,9 +118,13 @@ static long syz_compare_zlib(volatile long data, volatile long size, volatile lo struct stat statbuf; if (fstat(fd, &statbuf)) return -1; - void* uncompressed = mmap(0, statbuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0); - if (uncompressed == MAP_FAILED) - return -1; + void* uncompressed = NULL; + if (statbuf.st_size > 0) { + // We cannot mmap 0 bytes. + uncompressed = mmap(0, statbuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0); + if (uncompressed == MAP_FAILED) + return -1; + } return syz_compare(data, size, (long)uncompressed, statbuf.st_size); } #endif |