Description
In the Linux kernel, the following vulnerability has been resolved: arch_topology: Fix incorrect error check in topology_parse_cpu_capacity() Fix incorrect use of PTR_ERR_OR_ZERO() in topology_parse_cpu_capacity() which causes the code to proceed with NULL clock pointers. The current logic uses !PTR_ERR_OR_ZERO(cpu_clk) which evaluates to true for both valid pointers and NULL, leading to potential NULL pointer dereference in clk_get_rate(). Per include/linux/err.h documentation, PTR_ERR_OR_ZERO(ptr) returns: "The error code within @ptr if it is an error pointer; 0 otherwise." This means PTR_ERR_OR_ZERO() returns 0 for both valid pointers AND NULL pointers. Therefore !PTR_ERR_OR_ZERO(cpu_clk) evaluates to true (proceed) when cpu_clk is either valid or NULL, causing clk_get_rate(NULL) to be called when of_clk_get() returns NULL. Replace with !IS_ERR_OR_NULL(cpu_clk) which only proceeds for valid pointers, preventing potential NULL pointer dereference in clk_get_rate().
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
b8fe128dad8f97cc9af7c55a264d1fc5ab677195 to < 64da320252e43456cc9ec3055ff567f168467b37affectedb8fe128dad8f97cc9af7c55a264d1fc5ab677195 to < 02fbea0864fd4a863671f5d418129258d7159f68affectedb8fe128dad8f97cc9af7c55a264d1fc5ab677195 to < a77f8434954cb1e9c42c3854e40855fdcf5ab235affectedb8fe128dad8f97cc9af7c55a264d1fc5ab677195 to < 3373f263bb647fcc3b5237cfaef757633b9ee25eaffectedb8fe128dad8f97cc9af7c55a264d1fc5ab677195 to < 45379303124487db3a81219af7565d41f498167faffectedb8fe128dad8f97cc9af7c55a264d1fc5ab677195 to < 3a01b2614e84361aa222f67bc628593987e5cdb2affectedb8fe128dad8f97cc9af7c55a264d1fc5ab677195 to < 2eead19334516c8e9927c11b448fbe512b1f18a1affected
Linux Linux
Default version status: affected
5.7affected0 to < 5.7unaffected5.10.246 to ≤ 5.10.*unaffected5.15.196 to ≤ 5.15.*unaffected6.1.158 to ≤ 6.1.*unaffected6.6.115 to ≤ 6.6.*unaffected6.12.56 to ≤ 6.12.*unaffected6.17.6 to ≤ 6.17.*unaffected6.18 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/64da320252e43456cc9ec3055ff567f168467b37 ↗
- https://git.kernel.org/stable/c/02fbea0864fd4a863671f5d418129258d7159f68 ↗
- https://git.kernel.org/stable/c/a77f8434954cb1e9c42c3854e40855fdcf5ab235 ↗
- https://git.kernel.org/stable/c/3373f263bb647fcc3b5237cfaef757633b9ee25e ↗
- https://git.kernel.org/stable/c/45379303124487db3a81219af7565d41f498167f ↗
- https://git.kernel.org/stable/c/3a01b2614e84361aa222f67bc628593987e5cdb2 ↗
- https://git.kernel.org/stable/c/2eead19334516c8e9927c11b448fbe512b1f18a1 ↗