kernel: powerpc/powernv: Add a null pointer check to scom_debug_init_one()

In the Linux kernel, the following vulnerability has been resolved: powerpc/powernv: Add a null pointer check to scomdebuginitone The Linux kernel CVE team has assigned CVE-2023-52690 to this issue. Upstream advisory: https://lore.kernel.org/linux-cve-announce/2024051753-CVE-2023-52690-f225@gregk...

BELL-CVE-2023-52690

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CVE-2023-52690 powerpc/powernv: Add a null pointer check to scom_debug_init_one()

In the Linux kernel, the following vulnerability has been resolved: powerpc/powernv: Add a null pointer check to scomdebuginitone kasprintf returns a pointer to dynamically allocated memory which can be NULL upon failure. Add a null pointer check, and release 'ent' to avoid memory leaks...