bpf: Fix arm64 KASAN false positive after bpf_throw

arm64 passes zero as the stack pointer while walking BPF frames, so
bpf_throw() leaves stale KASAN stack poison after jumping to the
exception callback.

Use the frame pointer as the fallback stack watermark.

Fixes: e74cb1b42213 ("arm64: stacktrace: Implement arch_bpf_stack_walk() for the BPF JIT")
Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Tested-by: Ihor Solodrai <ihor.solodrai@linux.dev>
Link: https://lore.kernel.org/bpf/20260812-hello_world-v1-1-c3c2ddcb362d@meta.com

0 files changed, 0 insertions, 0 deletions