In the Linux kernel, the following vulnerability has been resolved:
bpf: Clear buf on error in __bpf_get_task_stack
Both bpf_get_task_stack and bpf_get_task_stack_sleepable helpers that
use __bpf_get_task_stack have buf defined as ARG_PTR_TO_UNINIT_MEM
argument and we should initialize the buf on every return path.
Adding missing buf memset for __bpf_get_task_stack fail paths. This
provides deterministic buffer contents, which is useful when the buffer
is used directly as a map key.
References 3
https://git.kernel.org/stable/c/f523359c4789bb0396d2d642464a6e2fd4f2299d
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/f5d242825ca417bb6afe35fde6e8880f97ca43fb
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/1f0f61573ba4cb899105b5cef65be3ca02205f93
416baaa9-dc9f-4396-8d5f-8c081fb06d67