Files
linux/include/net
Sabrina Dubroca d87f8bc47f xfrm: avoid RCU warnings around the per-netns netlink socket
net->xfrm.nlsk is used in 2 types of contexts:
 - fully under RCU, with rcu_read_lock + rcu_dereference and a NULL check
 - in the netlink handlers, with requests coming from a userspace socket

In the 2nd case, net->xfrm.nlsk is guaranteed to stay non-NULL and the
object is alive, since we can't enter the netns destruction path while
the user socket holds a reference on the netns.

After adding the __rcu annotation to netns_xfrm.nlsk (which silences
sparse warnings in the RCU users and __net_init code), we need to tell
sparse that the 2nd case is safe. Add a helper for that.

Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
2026-03-12 07:16:02 +01:00
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