diff options
| author | Yonghong Song <yhs@fb.com> | 2018-03-20 21:19:17 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-03-21 01:08:52 +0300 |
| commit | f005afede992e265bb98534b86912bb669ccd0d2 (patch) | |
| tree | c77bf0158253ff4fbd927bad98dee46c1b6e273b /kernel/bpf | |
| parent | 52fda36d63bfc8c8e8ae5eda8eb5ac6f52cd67ed (diff) | |
| download | linux-f005afede992e265bb98534b86912bb669ccd0d2.tar.xz | |
trace/bpf: remove helper bpf_perf_prog_read_value from tracepoint type programs
Commit 4bebdc7a85aa ("bpf: add helper bpf_perf_prog_read_value")
added helper bpf_perf_prog_read_value so that perf_event type program
can read event counter and enabled/running time.
This commit, however, introduced a bug which allows this helper
for tracepoint type programs. This is incorrect as bpf_perf_prog_read_value
needs to access perf_event through its bpf_perf_event_data_kern type context,
which is not available for tracepoint type program.
This patch fixed the issue by separating bpf_func_proto between tracepoint
and perf_event type programs and removed bpf_perf_prog_read_value
from tracepoint func prototype.
Fixes: 4bebdc7a85aa ("bpf: add helper bpf_perf_prog_read_value")
Reported-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'kernel/bpf')
0 files changed, 0 insertions, 0 deletions