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arch_bpf_trampoline_size() allocates a buffer to get actual size required for a trampoline. This buffer must be in the module address space because __arch_prepare_bpf_trampoline() calculates rel32 offsets relatively to that buffer. In preparation for enabling ROX mode for EXECMEM_BPF make sure that the allocated memory is writable. Add bpf_jit_alloc_exec_rw() wrapper for execmem_alloc_rw() and use it for buffer allocation in arch_bpf_trampoline_size(). Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Acked-by: Song Liu <song@kernel.org> Link: https://lore.kernel.org/bpf/20260716-execmem-x86-rox-bpf-v0-v3-4-4e76158c01c5@kernel.org Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> |
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