| Age | Commit message (Collapse) | Author | Files | Lines | |
|---|---|---|---|---|---|
| 2023-03-03 | bpf: Rename __kptr_ref -> __kptr and __kptr -> __kptr_untrusted. | Alexei Starovoitov | 1 | -1/+1 | |
| __kptr meant to store PTR_UNTRUSTED kernel pointers inside bpf maps. The concept felt useful, but didn't get much traction, since bpf_rdonly_cast() was added soon after and bpf programs received a simpler way to access PTR_UNTRUSTED kernel pointers without going through restrictive __kptr usage. Rename __kptr_ref -> __kptr and __kptr -> __kptr_untrusted to indicate its intended usage. The main goal of __kptr_untrusted was to read/write such pointers directly while bpf_kptr_xchg was a mechanism to access refcnted kernel pointers. The next patch will allow RCU protected __kptr access with direct read. At that point __kptr_untrusted will be deprecated. Signed-off-by: Alexei Starovoitov <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: David Vernet <[email protected]> Link: https://lore.kernel.org/bpf/[email protected] | |||||
| 2022-08-09 | selftests/bpf: Add test for prealloc_lru_pop bug | Kumar Kartikeya Dwivedi | 1 | -0/+49 | |
| Add a regression test to check against invalid check_and_init_map_value call inside prealloc_lru_pop. The kptr should not be reset to NULL once we set it after deleting the map element. Hence, we trigger a program that updates the element causing its reuse, and checks whether the unref kptr is reset or not. If it is, prealloc_lru_pop does an incorrect check_and_init_map_value call and the test fails. Acked-by: Yonghong Song <[email protected]> Signed-off-by: Kumar Kartikeya Dwivedi <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Alexei Starovoitov <[email protected]> | |||||