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authorDan Carpenter <dan.carpenter@oracle.com>2016-05-28 08:01:46 +0300
committerWolfram Sang <wsa@the-dreams.de>2016-05-28 17:37:42 +0200
commite6be18f6d62c1d3b331ae020b76a29c2ccf6b0bf (patch)
tree2ce62107bbfa2312926f4e1e49ef1300ad67b79d
parented2608faa0f701b1dbc65277a9e5c7ff7118bfd4 (diff)
downloadlinux-stericsson-e6be18f6d62c1d3b331ae020b76a29c2ccf6b0bf.tar.gz
i2c: dev: use after free in detach
The call to put_i2c_dev() frees "i2c_dev" so there is a use after free when we call cdev_del(&i2c_dev->cdev). Fixes: d6760b14d4a1 ('i2c: dev: switch from register_chrdev to cdev API') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
-rw-r--r--drivers/i2c/i2c-dev.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c
index 89593dcb79f0..6ecfd76270f2 100644
--- a/drivers/i2c/i2c-dev.c
+++ b/drivers/i2c/i2c-dev.c
@@ -592,9 +592,9 @@ static int i2cdev_detach_adapter(struct device *dev, void *dummy)
if (!i2c_dev) /* attach_adapter must have failed */
return 0;
+ cdev_del(&i2c_dev->cdev);
put_i2c_dev(i2c_dev);
device_destroy(i2c_dev_class, MKDEV(I2C_MAJOR, adap->nr));
- cdev_del(&i2c_dev->cdev);
pr_debug("i2c-dev: adapter [%s] unregistered\n", adap->name);
return 0;