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| author |   Lee Jones <lee@kernel.org> | 2022-09-12 14:38:55 +0100 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2022-09-16 18:00:52 +0200 |
| commit | 83c10cc362d91c0d8d25e60779ee52fdbbf3894d (patch) | |
| tree | 98b9cf773986ab7052dd7874ddb663d07dc2dd25 /tools/include/uapi/linux | |
| parent | bpf: btf: fix truncated last_member_type_id in btf_struct_resolve (diff) | |
| download | linux-dev-83c10cc362d91c0d8d25e60779ee52fdbbf3894d.tar.xz linux-dev-83c10cc362d91c0d8d25e60779ee52fdbbf3894d.zip | |
bpf: Ensure correct locking around vulnerable function find_vpid()
The documentation for find_vpid() clearly states:
"Must be called with the tasklist_lock or rcu_read_lock() held."
Presently we do neither for find_vpid() instance in bpf_task_fd_query().
Add proper rcu_read_lock/unlock() to fix the issue.
Fixes: 41bdc4b40ed6f ("bpf: introduce bpf subcommand BPF_TASK_FD_QUERY")
Signed-off-by: Lee Jones <lee@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20220912133855.1218900-1-lee@kernel.org
Diffstat (limited to 'tools/include/uapi/linux')
0 files changed, 0 insertions, 0 deletions