diff options
| author | Cheng-Min Chiang <chmnchiang@gmail.com> | 2020-12-02 22:58:40 +0800 |
|---|---|---|
| committer | Dmitry Vyukov <dvyukov@google.com> | 2020-12-07 12:16:42 +0100 |
| commit | b6cd37e38acccec1421055549f46948d667f0e60 (patch) | |
| tree | 3cda0604897ad2355898d389ee8749f3d67f7d3c /sys/linux/test/bpf_cgroup | |
| parent | 1190297f0bb22bd80fe3edea697e11150d2ada40 (diff) | |
sys/linux/test: add a test for bpf_cgroup_sysctl
- Add a test for BPF_PROG_TYPE_CGROUP_SYSCTL. This could be used as a
corpus.
- Remove an unnecessary file sys/linux/bpf_lsm.txt.const.
Diffstat (limited to 'sys/linux/test/bpf_cgroup')
| -rw-r--r-- | sys/linux/test/bpf_cgroup | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/sys/linux/test/bpf_cgroup b/sys/linux/test/bpf_cgroup new file mode 100644 index 000000000..026470f3d --- /dev/null +++ b/sys/linux/test/bpf_cgroup @@ -0,0 +1,25 @@ +# First, write to an entry of /proc/sys. It should work fine. + +r0 = openat$tcp_congestion(AUTO, &AUTO='/proc/sys/net/ipv4/tcp_congestion_control', AUTO, AUTO) + +r1 = write$tcp_congestion(r0, &AUTO='reno\x00', AUTO) + +# Now, load a BPF_PROG_TYPE_CGROUP_SYSCTL that simply returns 0, which will block all writes to /proc/sys + +r2 = bpf$PROG_LOAD(AUTO, &AUTO={0x17, AUTO, &AUTO=@framed={{AUTO, AUTO, AUTO, AUTO, 0x0, AUTO, AUTO, AUTO, 0x0}, [], {AUTO, AUTO, AUTO, AUTO}}, &AUTO='GPL\x00', 0x0, 0x0, 0x0, 0x0, 0x0, [0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0], 0x0, 0x12, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x78) + +r3 = openat(0xffffffffffffff9c, &AUTO='./cgroup\x00', 0x0, 0x0) + +r4 = bpf$BPF_PROG_ATTACH(AUTO, &AUTO={@cgroup=r3, r2, 0x12, 0x0, 0x0}, AUTO) + +# It should fail now. + +r5 = write$tcp_congestion(r0, &AUTO='reno\x00', AUTO) # EPERM + +# Detach the BPF program. + +r6 = bpf$BPF_PROG_DETACH(AUTO, &AUTO={@cgroup=r3, r2, 0x12, 0x0}, AUTO) + +# It should work again. + +r7 = write$tcp_congestion(r0, &AUTO='reno\x00', AUTO) |