I cannot test this kernel.
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https://bugs.launchpad.net/bugs/1988809
Title:
ip/nexthop: fix default address selection for connected nexthop
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Focal:
Fix Released
Status in linux source package in Jammy:
Fix Released
Bug description:
[Impact]
Packets sent by userland apps are rejected/dropped if the source
address is not specified and the corresponding route is using a
connected nexthop object.
This bug exists since linux v5.3 and has been fixed in v5.19 by the following
upstream commits:
- 747c14307214 ("ip: fix dflt addr selection for connected nexthop")
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=747c14307214
- cd72e61bad14 ("selftests/net: test nexthop without gw")
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cd72e61bad14
- eb55dc09b5dd ("ip: fix triggering of 'icmp redirect'")
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eb55dc09b5dd
The last commit (v6.0) fixes a regression introduced by the first
commit.
[Test Case]
A detailed test case is explained in the first commit and a self-test
is added in the second commit.
[Regression Potential]
The patch modifies some internal routing states. It has been living in the
upstream trees for 2 months and the reported regression about icmp redirects
has been fixed.
The risk of regression should be contained.
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