[net v2 0/2] Fix rcu_read_lock issues in netdev-genl

[Joe Damato <jdamato@fastly.com>]

Greetings:

Paolo reported a splat [1] when running the new selftest for busy poll.
I confirmed and reproduced this splat locally.

This series proposes 2 patches:
  - Patch 1:
    - Fixes a similar issue in an older commit and CCs stable as this
      fix could be backported.
  - Patch 2:
    - Fixes the issue Paolo hit while running the selftest

I retested locally after applying this series and confirmed that the
splat is fixed.

Thanks,
Joe

[1]: https://lore.kernel.org/netdev/719083c2-e277-447b-b6ea-ca3acb293a03@redhat.com/

v2:
  - Removed the helper and simplified to just add a rcu_read_lock /
    unlock in both patches instead.

rfc: https://lore.kernel.org/lkml/20241112181401.9689-1-jdamato@fastly.com/

Joe Damato (2):
  netdev-genl: Hold rcu_read_lock in napi_get
  netdev-genl: Hold rcu_read_lock in napi_set

 net/core/netdev-genl.c | 4 ++++
 1 file changed, 4 insertions(+)


base-commit: a58f00ed24b849d449f7134fd5d86f07090fe2f5
-- 
2.25.1