From: patchwork-bot+netdevbpf@kernel.org
To: Herve Codina <herve.codina@bootlin.com>
Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
pabeni@redhat.com, andriy.shevchenko@linux.intel.com,
christophe.leroy@csgroup.eu, netdev@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
thomas.petazzoni@bootlin.com, stable@vger.kernel.org
Subject: Re: [PATCH net v1] net: wan: fsl_qmc_hdlc: Convert carrier_lock spinlock to a mutex
Date: Thu, 01 Aug 2024 01:10:37 +0000 [thread overview]
Message-ID: <172247463718.20901.3118468784661815872.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20240730063104.179553-1-herve.codina@bootlin.com>
Hello:
This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@kernel.org>:
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!
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prev parent reply other threads:[~2024-08-01 1:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-30 6:31 [PATCH net v1] net: wan: fsl_qmc_hdlc: Convert carrier_lock spinlock to a mutex Herve Codina
2024-07-31 8:45 ` Simon Horman
2024-07-31 9:23 ` [PATCH net] " Markus Elfring
2024-08-01 1:10 ` patchwork-bot+netdevbpf [this message]
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