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| author |   Dan Carpenter <dan.carpenter@oracle.com> | 2016-05-28 08:01:46 +0300 |
|---|---|---|
| committer |   Wolfram Sang <wsa@the-dreams.de> | 2016-05-28 17:37:42 +0200 |
| commit | e6be18f6d62c1d3b331ae020b76a29c2ccf6b0bf (patch) | |
| tree | 2ce62107bbfa2312926f4e1e49ef1300ad67b79d /drivers/i2c/i2c-dev.c | |
| parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input (diff) | |
| download | linux-dev-e6be18f6d62c1d3b331ae020b76a29c2ccf6b0bf.tar.xz linux-dev-e6be18f6d62c1d3b331ae020b76a29c2ccf6b0bf.zip | |
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>
Diffstat (limited to 'drivers/i2c/i2c-dev.c')
| -rw-r--r-- | drivers/i2c/i2c-dev.c | 2 |
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; |