From: Sasha Levin <sashal@kernel.org>
To: stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>,
bigeasy@linutronix.de, willemb@google.com,
kerneljasonxing@gmail.com, edumazet@google.com,
pabeni@redhat.com, lulie@linux.alibaba.com, davem@davemloft.net,
kuba@kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, dust.li@linux.alibaba.com,
heiko.stuebner@cherry.de
Subject: Re: [PATCH 5.10.y] net: Drop the lock in skb_may_tx_timestamp()
Date: Mon, 13 Jul 2026 16:34:04 -0400 [thread overview]
Message-ID: <20260713131907.agent5-0004@kernel.org> (raw)
In-Reply-To: <20260713025017.38079-1-lulie@linux.alibaba.com>
> commit 983512f3a87fd8dc4c94dfa6b596b6e57df5aad7 upstream.
>
> skb_may_tx_timestamp() may acquire sock::sk_callback_lock. The lock must
> not be taken in IRQ context, only softirq is okay. A few drivers receive
> the timestamp via a dedicated interrupt and complete the TX timestamp
> from that handler. This will lead to a deadlock if the lock is already
> write-locked on the same CPU.
Queued for 5.10.y, thanks.
--
Thanks,
Sasha
prev parent reply other threads:[~2026-07-13 20:34 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-13 2:50 [PATCH 5.10.y] net: Drop the lock in skb_may_tx_timestamp() Philo Lu
2026-07-13 20:34 ` Sasha Levin [this message]
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