3 Commits

Author	SHA1	Message	Date
T.J. Mercier	6881af27f9	selftests/bpf: Fix OOB read in dmabuf_collector ... Dmabuf name allocations can be less than DMA_BUF_NAME_LEN characters, but bpf_probe_read_kernel always tries to read exactly that many bytes. If a name is less than DMA_BUF_NAME_LEN characters, bpf_probe_read_kernel will read past the end. bpf_probe_read_kernel_str stops at the first NUL terminator so use it instead, like iter_dmabuf_for_each already does. Fixes: ae5d2c59ec ("selftests/bpf: Add test for dmabuf_iter") Reported-by: Jerome Lee <jaewookl@quicinc.com> Signed-off-by: T.J. Mercier <tjmercier@google.com> Link: https://lore.kernel.org/r/20260225003349.113746-1-tjmercier@google.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>	2026-02-26 11:28:04 -08:00
T.J. Mercier	7594dcb71f	selftests/bpf: Add test for open coded dmabuf_iter ... Use the same test buffers as the traditional iterator and a new BPF map to verify the test buffers can be found with the open coded dmabuf iterator. Signed-off-by: T.J. Mercier <tjmercier@google.com> Acked-by: Christian König <christian.koenig@amd.com> Acked-by: Song Liu <song@kernel.org> Link: https://lore.kernel.org/r/20250522230429.941193-6-tjmercier@google.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>	2025-05-27 09:51:26 -07:00
T.J. Mercier	ae5d2c59ec	selftests/bpf: Add test for dmabuf_iter ... This test creates a udmabuf, and a dmabuf from the system dmabuf heap, and uses a BPF program that prints dmabuf metadata with the new dmabuf_iter to verify they can be found. Signed-off-by: T.J. Mercier <tjmercier@google.com> Acked-by: Christian König <christian.koenig@amd.com> Acked-by: Song Liu <song@kernel.org> Link: https://lore.kernel.org/r/20250522230429.941193-5-tjmercier@google.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>	2025-05-27 09:51:26 -07:00