Number of failed disks MUST be half of initial number of disks.
If number of failed disks is different we should not update
metadata- data corruption may occur after array reassemlation.
Signed-off-by: Krzysztof Wojcik <krzysztof.wojcik@xxxxxxxxx>
---
super-intel.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/super-intel.c b/super-intel.c
index e284a4a..b25d4fb 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -5835,6 +5835,10 @@ static int apply_takeover_update(struct imsm_update_takeover *u,
map = get_imsm_map(dev, 0);
if (u->direction == R10_TO_R0) {
+ /* Number of failed disks must be half of initial disk number */
+ if (imsm_count_failed(super, dev) != (map->num_members / 2))
+ return 0;
+
/* iterate through devices to mark removed disks as spare */
for (dm = super->disks; dm; dm = dm->next) {
if (dm->disk.status & FAILED_DISK) {
--
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