diff options
| -rw-r--r-- | applypatch/bspatch.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/applypatch/bspatch.c b/applypatch/bspatch.c index 2e80f81..1dc7ab1 100644 --- a/applypatch/bspatch.c +++ b/applypatch/bspatch.c @@ -205,6 +205,11 @@ int ApplyBSDiffPatchMem(const unsigned char* old_data, ssize_t old_size, ctrl[1] = offtin(buf+8); ctrl[2] = offtin(buf+16); + if (ctrl[0] < 0 || ctrl[1] < 0) { + printf("corrupt patch (negative byte counts)\n"); + return 1; + } + // Sanity check if (newpos + ctrl[0] > *new_size) { printf("corrupt patch (new file overrun)\n"); |