[PATCH 2/2] erofs-utils: fix EOD behavior when len is too large

[Gao Xiang]

Otherwise, read_count could be overflow and causes unexpected
behaviors.

Signed-off-by: Gao Xiang <hsiangkao at linux.alibaba.com>
---
 lib/io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/io.c b/lib/io.c
index 9e30b7e..9d718ab 100644
--- a/lib/io.c
+++ b/lib/io.c
@@ -289,7 +289,7 @@ int dev_read(int device_id, void *buf, u64 offset, size_t len)
 				erofs_info("Reach EOF of device - %s:[%" PRIu64 ", %zd].",
 					   erofs_devname, offset, len);
 				memset(buf, 0, len);
-				read_count = len;
+				return 0;
 			} else if (errno != EINTR) {
 				erofs_err("Failed to read data from device - %s:[%" PRIu64 ", %zd].",
 					  erofs_devname, offset, len);
-- 
2.24.4