diff options
| author | Alexei Starovoitov <[email protected]> | 2017-10-03 15:37:20 -0700 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2017-10-03 16:04:44 -0700 |
| commit | 90caccdd8cc0215705f18b92771b449b01e2474a (patch) | |
| tree | 8d091b5f97b4c15bf8127a48edd6bc4151374dac /tools/perf/scripts/python/stackcollapse.py | |
| parent | 05946876f0c16f6fe1db692d575aba42b25f0811 (diff) | |
bpf: fix bpf_tail_call() x64 JIT
- bpf prog_array just like all other types of bpf array accepts 32-bit index.
Clarify that in the comment.
- fix x64 JIT of bpf_tail_call which was incorrectly loading 8 instead of 4 bytes
- tighten corresponding check in the interpreter to stay consistent
The JIT bug can be triggered after introduction of BPF_F_NUMA_NODE flag
in commit 96eabe7a40aa in 4.14. Before that the map_flags would stay zero and
though JIT code is wrong it will check bounds correctly.
Hence two fixes tags. All other JITs don't have this problem.
Signed-off-by: Alexei Starovoitov <[email protected]>
Fixes: 96eabe7a40aa ("bpf: Allow selecting numa node during map creation")
Fixes: b52f00e6a715 ("x86: bpf_jit: implement bpf_tail_call() helper")
Acked-by: Daniel Borkmann <[email protected]>
Acked-by: Martin KaFai Lau <[email protected]>
Reviewed-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions