From 4b74a905a67e0587ffa6f75d76eb8112e6aa8eed Mon Sep 17 00:00:00 2001 From: Zhilong Liu Date: Tue, 5 Sep 2017 17:41:36 +0800 Subject: [PATCH] mdadm/grow: Component size must be larger than chunk size Git-commit: 4b74a905a67e0587ffa6f75d76eb8112e6aa8eed Patch-mainline: mdadm-4.0+ References: bsc#1069165, bsc#1069167, bsc#1068030 Grow: Changing component size must be larger than current chunk size against stripe raids, otherwise Grow_reshape() would set s->size to '0'. Signed-off-by: Zhilong Liu Signed-off-by: Jes Sorensen Signed-off-by: Coly Li --- Grow.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Grow.c b/Grow.c index 267b06f..bab1eec 100644 --- a/Grow.c +++ b/Grow.c @@ -1816,6 +1816,12 @@ int Grow_reshape(char *devname, int fd, return 1; } + if (array.level > 1 && + (array.chunk_size / 1024) > (int)s->size) { + pr_err("component size must be larger than chunk size.\n"); + return 1; + } + st = super_by_fd(fd, &subarray); if (!st) { pr_err("Unable to determine metadata format for %s\n", devname); -- 2.13.6