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author | Hou Tao <houtao1@huawei.com> | 2022-08-10 16:05:33 +0800 |
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committer | Alexei Starovoitov <ast@kernel.org> | 2022-08-10 10:12:48 -0700 |
commit | f0d2b2716d71778d0b0c8eaa433c073287d69d93 (patch) | |
tree | 6d2d2bbac610157cdfbeaa0538cb75e0f4b7b217 /net/core/bpf_sk_storage.c | |
parent | 3c5f6e698b5c538bbb23cd453b22e1e4922cffd8 (diff) |
bpf: Acquire map uref in .init_seq_private for sock{map,hash} iterator
sock_map_iter_attach_target() 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 sock_map_iter_detach_target() as part of
bpf_link_release(), or could be released in bpf_map_put_with_uref() as
part of bpf_map_release().
Fixing it by acquiring an extra map uref in .init_seq_private and
releasing it in .fini_seq_private.
Fixes: 0365351524d7 ("net: Allow iterating sockmap and sockhash")
Signed-off-by: Hou Tao <houtao1@huawei.com>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/r/20220810080538.1845898-5-houtao@huaweicloud.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'net/core/bpf_sk_storage.c')
0 files changed, 0 insertions, 0 deletions