a4778555c5
Bugzilla: https://bugzilla.redhat.com/2120968 commit 34d4ef5775f776ec4b0d53a02d588bf3195cada6 Author: Joanne Koong <joannelkoong@gmail.com> Date: Mon May 23 14:07:11 2022 -0700 bpf: Add dynptr data slices This patch adds a new helper function void *bpf_dynptr_data(struct bpf_dynptr *ptr, u32 offset, u32 len); which returns a pointer to the underlying data of a dynptr. *len* must be a statically known value. The bpf program may access the returned data slice as a normal buffer (eg can do direct reads and writes), since the verifier associates the length with the returned pointer, and enforces that no out of bounds accesses occur. Signed-off-by: Joanne Koong <joannelkoong@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20220523210712.3641569-6-joannelkoong@gmail.com Signed-off-by: Yauheni Kaliuta <ykaliuta@redhat.com> |
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