netdev - Re: [patch net v2] dpll: fix possible deadlock during netlink dump operation

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Date: Fri, 09 Feb 2024 02:40:26 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Jiri Pirko <jiri@...nulli.us>
Cc: netdev@...r.kernel.org, vadim.fedorenko@...ux.dev,
 arkadiusz.kubalewski@...el.com, kuba@...nel.org
Subject: Re: [patch net v2] dpll: fix possible deadlock during netlink dump
 operation

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Wed,  7 Feb 2024 12:59:02 +0100 you wrote:
> From: Jiri Pirko <jiri@...dia.com>
> 
> Recently, I've been hitting following deadlock warning during dpll pin
> dump:
> 
> [52804.637962] ======================================================
> [52804.638536] WARNING: possible circular locking dependency detected
> [52804.639111] 6.8.0-rc2jiri+ #1 Not tainted
> [52804.639529] ------------------------------------------------------
> [52804.640104] python3/2984 is trying to acquire lock:
> [52804.640581] ffff88810e642678 (nlk_cb_mutex-GENERIC){+.+.}-{3:3}, at: netlink_dump+0xb3/0x780
> [52804.641417]
>                but task is already holding lock:
> [52804.642010] ffffffff83bde4c8 (dpll_lock){+.+.}-{3:3}, at: dpll_lock_dumpit+0x13/0x20
> [52804.642747]
>                which lock already depends on the new lock.
> 
> [...]

Here is the summary with links:
  - [net,v2] dpll: fix possible deadlock during netlink dump operation
    https://git.kernel.org/netdev/net/c/53c0441dd2c4

You are awesome, thank you!
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