[SRU][N][PATCH 0/1] CVE-2024-46800

[Bethany Jamison]

[Impact]

If netem_dequeue() enqueues packet to inner qdisc and that qdisc
returns __NET_XMIT_STOLEN. The packet is dropped but
qdisc_tree_reduce_backlog() is not called to update the parent's
q.qlen, leading to a use-after-free.

[Fix]

Noble:	Clean cherry-pick from linux-6.10.y
Jammy:	pending (5.15.0-125.135)
Focal:	pending (5.4.0-200.220)
Bionic:	fix sent to esm ML
Xenial:	fix sent to esm ML
Trusty:	won't fix

[Test Case]

Compile and boot tested.

[Where problems could occur]

This fix affects those who use the sched Network Emulation Queuer,
an issue with this would be visible to the user via unexpected 
system behavior or a system crash.

Stephen Hemminger (1):
  sch/netem: fix use after free in netem_dequeue

 net/sched/sch_netem.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

-- 
2.34.1