Description

In the Linux kernel, the following vulnerability has been resolved: coresight: trbe: Return NULL pointer for allocation failures When the TRBE driver fails to allocate a buffer, it currently returns the error code "-ENOMEM". However, the caller etm_setup_aux() only checks for a NULL pointer, so it misses the error. As a result, the driver continues and eventually causes a kernel panic. Fix this by returning a NULL pointer from arm_trbe_alloc_buffer() on allocation failures. This allows that the callers can properly handle the failure.

References 6

• git.kernel.org https://git.kernel.org/stable/c/296da78494633e1ab5e2e74173a9c8683b04aa6b
• git.kernel.org https://git.kernel.org/stable/c/8a55c161f7f9c1aa1c70611b39830d51c83ef36d
• git.kernel.org https://git.kernel.org/stable/c/9768536f82600a05ce901e31ccfabd92c027ff71
• git.kernel.org https://git.kernel.org/stable/c/cef047e0a55cb07906fcaae99170f19a9c0bb6c2
• git.kernel.org https://git.kernel.org/stable/c/f505a165f1c7cd37b4cb6952042a5984693a4067
• git.kernel.org https://git.kernel.org/stable/c/fe53a726d5edf864e80b490780cc135fc1adece9

Remediation