diff options
| author | Rabin Vincent <rabin@rab.in> | 2016-01-12 20:17:08 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-01-12 17:06:53 -0500 |
| commit | 229394e8e62a4191d592842cf67e80c62a492937 (patch) | |
| tree | b16b3b389afb1bb660373bab3ec2f986d99a6e13 /lib | |
| parent | 7aaed57c5c2890634cfadf725173c7c68ea4cb4f (diff) | |
| download | linux-229394e8e62a4191d592842cf67e80c62a492937.tar.bz2 | |
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>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions