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| author | Hou Tao <houtao1@huawei.com> | 2022-03-09 20:33:20 +0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2022-03-16 15:13:36 -0700 |
| commit | d2a3b7c5becc3992f8e7d2b9bf5eacceeedb9a48 (patch) | |
| tree | c70bd9195500322ed9bbf0e4b783e9038dc3ffee /tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c | |
| parent | 73e14451f39e54f83ea3badb6d6b8a423f901845 (diff) | |
| download | linux-d2a3b7c5becc3992f8e7d2b9bf5eacceeedb9a48.tar.gz linux-d2a3b7c5becc3992f8e7d2b9bf5eacceeedb9a48.tar.bz2 linux-d2a3b7c5becc3992f8e7d2b9bf5eacceeedb9a48.zip | |
bpf: Fix net.core.bpf_jit_harden race
It is the bpf_jit_harden counterpart to commit 60b58afc96c9 ("bpf: fix
net.core.bpf_jit_enable race"). bpf_jit_harden will be tested twice
for each subprog if there are subprogs in bpf program and constant
blinding may increase the length of program, so when running
"./test_progs -t subprogs" and toggling bpf_jit_harden between 0 and 2,
jit_subprogs may fail because constant blinding increases the length
of subprog instructions during extra passs.
So cache the value of bpf_jit_blinding_enabled() during program
allocation, and use the cached value during constant blinding, subprog
JITing and args tracking of tail call.
Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20220309123321.2400262-4-houtao1@huawei.com
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c')
0 files changed, 0 insertions, 0 deletions