diff options
| author | Naveen N. Rao <[email protected]> | 2019-08-21 19:23:58 +0000 |
|---|---|---|
| committer | Daniel Borkmann <[email protected]> | 2019-08-26 21:05:01 +0000 |
| commit | ede7c460b1da5be7b8ef4efe47f1687babf06408 (patch) | |
| tree | e5263710f10a78a6a58716b01eda99dfae0c561a /tools/testing/selftests/tc-testing/plugin-lib/nsPlugin.py | |
| parent | nfp: bpf: fix latency bug when updating stack index register (diff) | |
| download | kernel-ede7c460b1da5be7b8ef4efe47f1687babf06408.tar.gz kernel-ede7c460b1da5be7b8ef4efe47f1687babf06408.zip | |
bpf: handle 32-bit zext during constant blinding
Since BPF constant blinding is performed after the verifier pass, the
ALU32 instructions inserted for doubleword immediate loads don't have a
corresponding zext instruction. This is causing a kernel oops on powerpc
and can be reproduced by running 'test_cgroup_storage' with
bpf_jit_harden=2.
Fix this by emitting BPF_ZEXT during constant blinding if
prog->aux->verifier_zext is set.
Fixes: a4b1d3c1ddf6cb ("bpf: verifier: insert zero extension according to analysis result")
Reported-by: Michael Ellerman <[email protected]>
Signed-off-by: Naveen N. Rao <[email protected]>
Reviewed-by: Jiong Wang <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
Diffstat (limited to 'tools/testing/selftests/tc-testing/plugin-lib/nsPlugin.py')
0 files changed, 0 insertions, 0 deletions