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author | Hou Tao <houtao1@huawei.com> | 2022-08-10 16:05:32 +0800 |
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committer | Alexei Starovoitov <ast@kernel.org> | 2022-08-10 10:12:48 -0700 |
commit | 3c5f6e698b5c538bbb23cd453b22e1e4922cffd8 (patch) | |
tree | 266aa1abc3e616ba1911890060ae4a8fc4a1e320 /net/core/sock_map.c | |
parent | ef1e93d2eeb58a1f08c37b22a2314b94bc045f15 (diff) |
bpf: Acquire map uref in .init_seq_private for sock local storage map iterator
bpf_iter_attach_map() acquires a map uref, and the uref may be released
before or in the middle of iterating map elements. For example, the uref
could be released in bpf_iter_detach_map() as part of
bpf_link_release(), or could be released in bpf_map_put_with_uref() as
part of bpf_map_release().
So acquiring an extra map uref in bpf_iter_init_sk_storage_map() and
releasing it in bpf_iter_fini_sk_storage_map().
Fixes: 5ce6e77c7edf ("bpf: Implement bpf iterator for sock local storage map")
Signed-off-by: Hou Tao <houtao1@huawei.com>
Acked-by: Yonghong Song <yhs@fb.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/r/20220810080538.1845898-4-houtao@huaweicloud.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'net/core/sock_map.c')
0 files changed, 0 insertions, 0 deletions