Against the raids which chunk_size is meaningful, the component_size must be >= chunk_size when require resize. If "new_size < chunk_size" has required, the "mddev->pers->resize" will set sectors as '0', and then the raids isn't meaningful any more due to mddev->dev_sectors is '0'. Cc: Neil Brown <neilb@xxxxxxxx> Signed-off-by: Zhilong Liu <zlliu@xxxxxxxx> --- drivers/md/raid10.c | 2 ++ drivers/md/raid5.c | 2 ++ 2 files changed, 4 insertions(+) diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 374df57..f3891f6 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -3871,6 +3871,8 @@ static int raid10_resize(struct mddev *mddev, sector_t sectors) oldsize = raid10_size(mddev, 0, 0); size = raid10_size(mddev, sectors, 0); + if (size == 0) + return -EINVAL; if (mddev->external_size && mddev->array_sectors > size) return -EINVAL; diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 928e24a..768767c 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -7725,6 +7725,8 @@ static int raid5_resize(struct mddev *mddev, sector_t sectors) if (conf->log || raid5_has_ppl(conf)) return -EINVAL; sectors &= ~((sector_t)conf->chunk_sectors - 1); + if (sectors == 0) + return -EINVAL; newsize = raid5_size(mddev, sectors, mddev->raid_disks); if (mddev->external_size && mddev->array_sectors > newsize) -- 2.6.6 -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
