Thread (4 messages) 4 messages, 4 authors, 2024-09-03

Re: [PATCH net v5] bpf, net: Fix a potential race in do_sock_getsockopt()

From: patchwork-bot+netdevbpf@kernel.org
Date: 2024-09-03 20:10:29
Also in: bpf, linux-arm-kernel, linux-mediatek, lkml

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski [off-list ref]:

On Fri, 30 Aug 2024 16:25:17 +0800 you wrote:
There's a potential race when `cgroup_bpf_enabled(CGROUP_GETSOCKOPT)` is
false during the execution of `BPF_CGROUP_GETSOCKOPT_MAX_OPTLEN`, but
becomes true when `BPF_CGROUP_RUN_PROG_GETSOCKOPT` is called.
This inconsistency can lead to `BPF_CGROUP_RUN_PROG_GETSOCKOPT` receiving
an "-EFAULT" from `__cgroup_bpf_run_filter_getsockopt(max_optlen=0)`.
Scenario shown as below:

[...]
Here is the summary with links:
  - [net,v5] bpf, net: Fix a potential race in do_sock_getsockopt()
    https://git.kernel.org/netdev/net/c/33f339a1ba54

You are awesome, thank you!
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