[SRU][J/F][PATCH v2 0/1] CVE-2024-44940

[Bethany Jamison]

[Impact]

Drop the WARN_ON_ONCE inn gue_gro_receive if the encapsulated type is
not known or does not have a GRO handler. Such a packet is easily 
constructed. Syzbot generates them and sets off this warning. Remove 
the warning as it is expected and not actionable.

[Fix]

Noble:	applied via stable team
Jammy:	Clean cherry-pick from linux-6.1.y
Focal:	Backport from linux-6.1.y - kept 'goto out_unlock' instead of 
	'goto out', avoided adding commit 
	fc1ca3348a74a1afaa7ffebc2b2f2cc149e11278
Bionic:	pending (4.15.0-230.242)
Xenial:	pending (4.4.0-260.294)
Trusty:	not-affected

[Test Case]

Compile and boot tested.

[Where problems could occur]

This fix affects those who use FOU (Foo-over-UDP), an issue with this
fix would be visible to the user via continued excessive warnings from
'gue_gro_recieve'.

v2: My Jammy patch in v1 was incorrect, I believed that Jammy was missing
    commit fc1ca3348a74a1afaa7ffebc2b2f2cc149e11278 like Focal, and so I
    manually backported 'goto out_unlock' instead of using 'goto out'. 
    Additionally, between v1 and v2 the fix commit was applied to Noble
    via the stable team, so I did not include a patch for Noble in v2.

Willem de Bruijn (1):
  fou: remove warn in gue_gro_receive on unsupported protocol

 net/ipv4/fou.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.34.1