Thread (4 messages) 4 messages, 4 authors, 2021-01-19

Re: [Patch net-next] net_sched: fix RTNL deadlock again caused by request_module()

From: patchwork-bot+netdevbpf@kernel.org
Date: 2021-01-19 04:36:49

Hello:

This patch was applied to netdev/net-next.git (refs/heads/master):

On Sat, 16 Jan 2021 16:56:57 -0800 you wrote:
From: Cong Wang <redacted>

tcf_action_init_1() loads tc action modules automatically with
request_module() after parsing the tc action names, and it drops RTNL
lock and re-holds it before and after request_module(). This causes a
lot of troubles, as discovered by syzbot, because we can be in the
middle of batch initializations when we create an array of tc actions.

[...]
Here is the summary with links:
  - [net-next] net_sched: fix RTNL deadlock again caused by request_module()
    https://git.kernel.org/netdev/net-next/c/d349f9976868

You are awesome, thank you!
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