diff options
| author | Song Liu <song@kernel.org> | 2022-05-20 16:57:51 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2022-05-23 23:07:29 +0200 |
| commit | d88bb5eed04ce50cc20e7f9282977841728be798 (patch) | |
| tree | 699971170d11656aa2f2a15d9fce780edb856500 /scripts/bpf_doc.py | |
| parent | f9a3eca4bc0452a7079282d1ad87d65cb3463f0a (diff) | |
| download | linux-d88bb5eed04ce50cc20e7f9282977841728be798.tar.gz linux-d88bb5eed04ce50cc20e7f9282977841728be798.tar.bz2 linux-d88bb5eed04ce50cc20e7f9282977841728be798.zip | |
bpf: Fill new bpf_prog_pack with illegal instructions
bpf_prog_pack enables sharing huge pages among multiple BPF programs.
These pages are marked as executable before the JIT engine fill it with
BPF programs. To make these pages safe, fill the hole bpf_prog_pack with
illegal instructions before making it executable.
Fixes: 57631054fae6 ("bpf: Introduce bpf_prog_pack allocator")
Fixes: 33c9805860e5 ("bpf: Introduce bpf_jit_binary_pack_[alloc|finalize|free]")
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220520235758.1858153-2-song@kernel.org
Diffstat (limited to 'scripts/bpf_doc.py')
0 files changed, 0 insertions, 0 deletions