When calculating the end byte for the sync we preform an addition which might result in an overflow, which is undefined. Avoid it by doing unsigned addition. Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx> --- fs/sync.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/sync.c b/fs/sync.c index 6ccfc38..f9cb38f 100644 --- a/fs/sync.c +++ b/fs/sync.c @@ -286,7 +286,7 @@ SYSCALL_DEFINE4(sync_file_range, int, fd, loff_t, offset, loff_t, nbytes, if (flags & ~VALID_FLAGS) goto out; - endbyte = offset + nbytes; + endbyte = offset + (u64)nbytes; if ((s64)offset < 0) goto out; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
