Description
In the Linux kernel, the following vulnerability has been resolved: net: rfkill: gpio: Fix crash due to dereferencering uninitialized pointer Since commit 7d5e9737efda ("net: rfkill: gpio: get the name and type from device property") rfkill_find_type() gets called with the possibly uninitialized "const char *type_name;" local variable. On x86 systems when rfkill-gpio binds to a "BCM4752" or "LNV4752" acpi_device, the rfkill->type is set based on the ACPI acpi_device_id: rfkill->type = (unsigned)id->driver_data; and there is no "type" property so device_property_read_string() will fail and leave type_name uninitialized, leading to a potential crash. rfkill_find_type() does accept a NULL pointer, fix the potential crash by initializing type_name to NULL. Note likely sofar this has not been caught because: 1. Not many x86 machines actually have a "BCM4752"/"LNV4752" acpi_device 2. The stack happened to contain NULL where type_name is stored
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
7d5e9737efda16535e5b54bd627ef4881d11d31f to < 184f608a68f96794e8fe58cd5535014d53622cdeaffected7d5e9737efda16535e5b54bd627ef4881d11d31f to < 8793e7a8e1b60131a825457174ed6398111daeb7affected7d5e9737efda16535e5b54bd627ef4881d11d31f to < ada2282259243387e6b6e89239aeb4897e62f051affected7d5e9737efda16535e5b54bd627ef4881d11d31f to < 47ade5f9d70b23a119ec20b1c6504864b2543a79affected7d5e9737efda16535e5b54bd627ef4881d11d31f to < 689aee35ce671aab752f159e5c8e66d7685e6887affected7d5e9737efda16535e5b54bd627ef4881d11d31f to < 21ba85d9d508422ca9e6698463ff9357c928c22daffected7d5e9737efda16535e5b54bd627ef4881d11d31f to < 21a39b958b4bcf44f7674bfbbe1bbb8cad0d842daffected7d5e9737efda16535e5b54bd627ef4881d11d31f to < b6f56a44e4c1014b08859dcf04ed246500e310e5affected
Linux Linux
Default version status: affected
4.6affected0 to < 4.6unaffected5.4.300 to ≤ 5.4.*unaffected5.10.245 to ≤ 5.10.*unaffected5.15.194 to ≤ 5.15.*unaffected6.1.154 to ≤ 6.1.*unaffected6.6.108 to ≤ 6.6.*unaffected6.12.49 to ≤ 6.12.*unaffected6.16.9 to ≤ 6.16.*unaffected6.17 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/184f608a68f96794e8fe58cd5535014d53622cde ↗
- https://git.kernel.org/stable/c/8793e7a8e1b60131a825457174ed6398111daeb7 ↗
- https://git.kernel.org/stable/c/ada2282259243387e6b6e89239aeb4897e62f051 ↗
- https://git.kernel.org/stable/c/47ade5f9d70b23a119ec20b1c6504864b2543a79 ↗
- https://git.kernel.org/stable/c/689aee35ce671aab752f159e5c8e66d7685e6887 ↗
- https://git.kernel.org/stable/c/21ba85d9d508422ca9e6698463ff9357c928c22d ↗
- https://git.kernel.org/stable/c/21a39b958b4bcf44f7674bfbbe1bbb8cad0d842d ↗
- https://git.kernel.org/stable/c/b6f56a44e4c1014b08859dcf04ed246500e310e5 ↗