Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski [off-list ref]:

On Tue, 19 May 2026 10:26:33 -0700 you wrote:

The networking receive path is usually run from softirq context, but
protocols that take the socket lock may have packets stored in the
backlog and processed later from process context. In that case
release_sock() -> __release_sock() drops the slock with spin_unlock_bh()
and then calls sk->sk_backlog_rcv() with bottom halves enabled.

Typical sk_backlog_rcv handlers process the socket whose backlog is
being drained, so the BH state at entry is irrelevant for the slocks
they touch. pep_do_rcv() is different: when the inbound skb targets an
existing PEP pipe, it forwards the skb to a different *child* socket
via sk_receive_skb(). That helper takes the child slock with
bh_lock_sock_nested(), which is just spin_lock_nested() and assumes BH
is already off. The same child slock therefore ends up acquired with
BH on (process path) and with BH off (softirq path):

[...]

Here is the summary with links:
  - [net] phonet/pep: disable BH around forwarded sk_receive_skb()
    https://git.kernel.org/netdev/net/c/dbc81608e3a6

You are awesome, thank you!
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