Offering: HULK hulk inclusion category: bugfix bugzilla: 188733, https://gitee.com/openeuler/kernel/issues/I81XCK
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When idr_alloc fails and goes the out_cleanup_disk error path, we get a null pointer dereference problem because dev->gd has not been assigned a value at this time.
Fix this problem by changing dev->gd to gd.
Fixes: 2bf50d42f3a4 ("UBI: block: Dynamically allocate minor numbers") Signed-off-by: Zhong Jinghua zhongjinghua@huawei.com --- drivers/mtd/ubi/block.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mtd/ubi/block.c b/drivers/mtd/ubi/block.c index 669b53244096..9e71a7803224 100644 --- a/drivers/mtd/ubi/block.c +++ b/drivers/mtd/ubi/block.c @@ -462,7 +462,7 @@ int ubiblock_create(struct ubi_volume_info *vi) out_remove_minor: idr_remove(&ubiblock_minor_idr, gd->first_minor); out_cleanup_disk: - blk_cleanup_disk(dev->gd); + blk_cleanup_disk(gd); out_free_tags: blk_mq_free_tag_set(&dev->tag_set); out_free_dev: