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Subject[PATCH v2] mmc: fix use-after-free issue
Date
 The data structure member “rpmb->md” was passed to a call of
the function “mmc_blk_put” after a call of the function “put_device”.
Reorder these function calls to keep the data accesses consistent.

Fixes: 1c87f7357849 ("mmc: block: Fix bug when removing RPMB chardev ")
Signed-off-by: Peng Hao <richard.peng@oppo.com>
---
drivers/mmc/core/block.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index 8499b56..e6e025c 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -2483,8 +2483,8 @@ static int mmc_rpmb_chrdev_release(struct inode *inode, struct file *filp)
struct mmc_rpmb_data *rpmb = container_of(inode->i_cdev,
struct mmc_rpmb_data, chrdev);

-put_device(&rpmb->dev);
mmc_blk_put(rpmb->md);
+put_device(&rpmb->dev);

return 0;
}
--
2.7.4
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