Both offset and len are signed integers who's overflow isn't defined. Use unsigned addition to avoid the issue.
Signed-off-by: Sasha Levin <[email protected]> --- mm/fadvise.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/fadvise.c b/mm/fadvise.c index 3bcfd81d..762cb63 100644 --- a/mm/fadvise.c +++ b/mm/fadvise.c @@ -67,7 +67,7 @@ SYSCALL_DEFINE4(fadvise64_64, int, fd, loff_t, offset, loff_t, len, int, advice) } /* Careful about overflows. Len == 0 means "as much as possible" */ - endbyte = offset + len; + endbyte = offset + (u64)len; if (!len || endbyte < len) endbyte = -1; else -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
