diff options
| author | Matteo Croce <teknoraver@meta.com> | 2024-10-10 04:56:52 +0100 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2024-10-10 08:52:36 -0700 |
| commit | 5bd48a3a14df4b3ee1be0757efcc0f40d4f57b35 (patch) | |
| tree | 65e2ea6fdecffdfec494ec9b8ee4cd985d136d42 /include/uapi/linux/bpf.h | |
| parent | 4073213488be542f563eb4b2457ab4cbcfc2b738 (diff) | |
bpf: fix argument type in bpf_loop documentation
The `index` argument to bpf_loop() is threaded as an u64.
This lead in a subtle verifier denial where clang cloned the argument
in another register[1].
[1] https://github.com/systemd/systemd/pull/34650#issuecomment-2401092895
Signed-off-by: Matteo Croce <teknoraver@meta.com>
Link: https://lore.kernel.org/r/20241010035652.17830-1-technoboy85@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include/uapi/linux/bpf.h')
| -rw-r--r-- | include/uapi/linux/bpf.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index 8ab4d8184b9d..874af0186fe8 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -5371,7 +5371,7 @@ union bpf_attr { * Currently, the **flags** must be 0. Currently, nr_loops is * limited to 1 << 23 (~8 million) loops. * - * long (\*callback_fn)(u32 index, void \*ctx); + * long (\*callback_fn)(u64 index, void \*ctx); * * where **index** is the current index in the loop. The index * is zero-indexed. |