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authorRabin Vincent <rabin@rab.in>2016-01-12 20:17:08 +0100
committerDavid S. Miller <davem@davemloft.net>2016-01-12 15:55:39 -0500
commit06928b3870d213cb42b00e2949419f2d44b9d45f (patch)
treed1427c587b190b02f7d2e5b842c1804f38386128 /net/netlink
parent03d84a5f83a67e692af00a3d3901e7820e3e84d5 (diff)
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net: bpf: reject invalid shifts
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>
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