diff options
| author | Pu Lehui <[email protected]> | 2024-06-22 03:04:35 +0000 |
|---|---|---|
| committer | Daniel Borkmann <[email protected]> | 2024-07-01 17:10:46 +0200 |
| commit | d1a426171d76b2cdf3dea5d52f6266090e4aa254 (patch) | |
| tree | a96c498ba0067e8966e1c9cc8ebb9cae0df7c829 | |
| parent | 5b747c23f17d791e08fdf4baa7e14b704625518c (diff) | |
bpf: Use precise image size for struct_ops trampoline
For trampoline using bpf_prog_pack, we need to generate a rw_image
buffer with size of (image_end - image). For regular trampoline, we use
the precise image size generated by arch_bpf_trampoline_size to allocate
rw_image. But for struct_ops trampoline, we allocate rw_image directly
using close to PAGE_SIZE size. We do not need to allocate for that much,
as the patch size is usually much smaller than PAGE_SIZE. Let's use
precise image size for it too.
Signed-off-by: Pu Lehui <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
Tested-by: Björn Töpel <[email protected]> #riscv
Acked-by: Song Liu <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
| -rw-r--r-- | kernel/bpf/bpf_struct_ops.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/bpf/bpf_struct_ops.c b/kernel/bpf/bpf_struct_ops.c index a2cf31b14be4..0d515ec57aa5 100644 --- a/kernel/bpf/bpf_struct_ops.c +++ b/kernel/bpf/bpf_struct_ops.c @@ -573,7 +573,7 @@ int bpf_struct_ops_prepare_trampoline(struct bpf_tramp_links *tlinks, } size = arch_prepare_bpf_trampoline(NULL, image + image_off, - image + PAGE_SIZE, + image + image_off + size, model, flags, tlinks, stub_func); if (size <= 0) { if (image != *_image) |