Re: [PATCH net-next] ppp: update channel locking comment and doc
From: Qingfang Deng <hidden>
Date: 2026-08-10 01:20:01
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On 2026/8/7 14:01, Qingfang Deng wrote:
Commit ec4215683e47 ("ppp: defer channel free to an RCU grace period to
fix pppol2tp RX UAF") defers freeing generic channel state to an RCU
grace period via call_rcu().
Update the SMP locking notes comment in include/linux/ppp_channel.h and
Documentation/networking/ppp_generic.rst to reflect that in-flight RCU
readers can complete safely after ppp_unregister_channel().
Reported by Sashiko.
Signed-off-by: Qingfang Deng <redacted>Sashiko pointed out more issues. I should keep the comments for now. --- pw-bot: cr