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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2022-04-11 21:07:51 +0300
committerWolfram Sang <wsa@kernel.org>2022-04-15 23:23:22 +0200
commit993eb48fa199b5f476df8204e652eff63dd19361 (patch)
treefc22bac6211f200a76fcc1f4944000e78495b41a /drivers
parentc60bd968c74749a85c71dfed5fabd3e36d487d54 (diff)
i2c: dev: check return value when calling dev_set_name()
If dev_set_name() fails, the dev_name() is null, check the return value of dev_set_name() to avoid the null-ptr-deref. Fixes: 1413ef638aba ("i2c: dev: Fix the race between the release of i2c_dev and cdev") Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/i2c/i2c-dev.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c
index cf5d049342ea..6fd2b6718b08 100644
--- a/drivers/i2c/i2c-dev.c
+++ b/drivers/i2c/i2c-dev.c
@@ -668,16 +668,21 @@ static int i2cdev_attach_adapter(struct device *dev, void *dummy)
i2c_dev->dev.class = i2c_dev_class;
i2c_dev->dev.parent = &adap->dev;
i2c_dev->dev.release = i2cdev_dev_release;
- dev_set_name(&i2c_dev->dev, "i2c-%d", adap->nr);
+
+ res = dev_set_name(&i2c_dev->dev, "i2c-%d", adap->nr);
+ if (res)
+ goto err_put_i2c_dev;
res = cdev_device_add(&i2c_dev->cdev, &i2c_dev->dev);
- if (res) {
- put_i2c_dev(i2c_dev, false);
- return res;
- }
+ if (res)
+ goto err_put_i2c_dev;
pr_debug("adapter [%s] registered as minor %d\n", adap->name, adap->nr);
return 0;
+
+err_put_i2c_dev:
+ put_i2c_dev(i2c_dev, false);
+ return res;
}
static int i2cdev_detach_adapter(struct device *dev, void *dummy)