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Rabin Vincent authored
commit 229394e8 upstream. On ARM64, a BUG() is triggered in the eBPF JIT if a filter with a constant shift that can't be encoded in the immediate field of the UBFM/SBFM instructions is passed to the JIT. Since these shifts amounts, which are negative or >= regsize, are invalid, reject them in the eBPF verifier and the classic BPF filter checker, for all architectures. Signed-off-by:
Rabin Vincent <rabin@rab.in> Acked-by:
Alexei Starovoitov <ast@kernel.org> Acked-by:
Daniel Borkmann <daniel@iogearbox.net> Signed-off-by:
David S. Miller <davem@davemloft.net> [ luis: backported to 3.16: - drop changes to eBPF verifier, only added in 3.18 kernel - function rename: bpf_check_classic() -> sk_chk_filter() ] Signed-off-by:
Luis Henriques <luis.henriques@canonical.com>
48d9ee84