diff options
| -rw-r--r-- | libbb/read.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libbb/read.c b/libbb/read.c index 1c2945f45..b3648b4d7 100644 --- a/libbb/read.c +++ b/libbb/read.c @@ -86,7 +86,8 @@ char *reads(int fd, char *buffer, size_t size) if (p) { off_t offset; *p++ = '\0'; - offset = (p-buffer) - size; + // avoid incorrect (unsigned) widening + offset = (off_t)(p-buffer) - (off_t)size; // set fd position the right after the \n if (offset && lseek(fd, offset, SEEK_CUR) == (off_t)-1) return NULL; |