Description
In the Linux kernel, the following vulnerability has been resolved: rtc: pcf8563: fix clock provider leak on unbind pcf8563_clkout_register_clk() registers the CLKOUT clock provider with of_clk_add_provider(), but nothing ever unwinds it: there is no of_clk_del_provider() call and the driver has no remove callback. Each of_clk_add_provider() allocates a struct of_clk_provider, takes a reference on the OF node and adds an entry to the global of_clk_providers list, none of which is released when the device is unbound. Every bind/unbind (or module reload) therefore leaks a provider structure and an of_node reference. The clock itself is already device-managed (devm_clk_register()); only the provider registration was not. Use devm_of_clk_add_hw_provider() so the provider is removed automatically on unbind. Tie it to the parent i2c device, whose OF node carries the #clock-cells and clock-output-names properties (the RTC class device has no OF node of its own).
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
a39a6405d5f949bc651694028a55d74c514ef1f9 to < 2b5622cf4ee218b6f98d31dbf3fbd44b9b6bd675affecteda39a6405d5f949bc651694028a55d74c514ef1f9 to < 36cb00c33bd83e7ce31b5a9f1f7c70db0cb7776caffecteda39a6405d5f949bc651694028a55d74c514ef1f9 to < 30b7c63af50fe1464e7582a37de1ca4bd030ecc1affecteda39a6405d5f949bc651694028a55d74c514ef1f9 to < 7afb8db47c4f107bce89cfe5115fb31ba7c94665affecteda39a6405d5f949bc651694028a55d74c514ef1f9 to < 97edf3fd9a46ea89a167966991c0449cfa07b36faffecteda39a6405d5f949bc651694028a55d74c514ef1f9 to < 08a59c28c2bdbcd655e99526c86a41dc83834283affecteda39a6405d5f949bc651694028a55d74c514ef1f9 to < 6218c0533a72235ec9c5f41b812c63d963bd4a3eaffecteda39a6405d5f949bc651694028a55d74c514ef1f9 to < 9c48a53685040bb0de45a640b34055cbbfc69d4faffected
Linux Linux
Default version status: affected
4.4affected0 to < 4.4unaffected5.10.270 to ≤ 5.10.*unaffected5.15.221 to ≤ 5.15.*unaffected6.1.188 to ≤ 6.1.*unaffected6.6.157 to ≤ 6.6.*unaffected6.12.110 to ≤ 6.12.*unaffected6.18.52 to ≤ 6.18.*unaffected7.2.6 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/2b5622cf4ee218b6f98d31dbf3fbd44b9b6bd675 ↗
- https://git.kernel.org/stable/c/36cb00c33bd83e7ce31b5a9f1f7c70db0cb7776c ↗
- https://git.kernel.org/stable/c/30b7c63af50fe1464e7582a37de1ca4bd030ecc1 ↗
- https://git.kernel.org/stable/c/7afb8db47c4f107bce89cfe5115fb31ba7c94665 ↗
- https://git.kernel.org/stable/c/97edf3fd9a46ea89a167966991c0449cfa07b36f ↗
- https://git.kernel.org/stable/c/08a59c28c2bdbcd655e99526c86a41dc83834283 ↗
- https://git.kernel.org/stable/c/6218c0533a72235ec9c5f41b812c63d963bd4a3e ↗
- https://git.kernel.org/stable/c/9c48a53685040bb0de45a640b34055cbbfc69d4f ↗