Hello:
This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@xxxxxxxxxx>:
On Tue, 30 Jul 2024 08:31:04 +0200 you wrote:
> The carrier_lock spinlock protects the carrier detection. While it is
> hold, framer_get_status() is called witch in turn takes a mutex.
> This is not correct and can lead to a deadlock.
>
> A run with PROVE_LOCKING enabled detected the issue:
> [ BUG: Invalid wait context ]
> ...
> c204ddbc (&framer->mutex){+.+.}-{3:3}, at: framer_get_status+0x40/0x78
> other info that might help us debug this:
> context-{4:4}
> 2 locks held by ifconfig/146:
> #0: c0926a38 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x12c/0x664
> #1: c2006a40 (&qmc_hdlc->carrier_lock){....}-{2:2}, at: qmc_hdlc_framer_set_carrier+0x30/0x98
>
> [...]
Here is the summary with links:
- [net,v1] net: wan: fsl_qmc_hdlc: Convert carrier_lock spinlock to a mutex
https://git.kernel.org/netdev/net/c/c4d6a347ba7b
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html
