On 9/1/25 2:30 AM, Ido Schimmel wrote:

When generating ICMP error messages, the kernel will prefer a source IP
that is on the same subnet as the destination IP (see
inet_select_addr()). Test this behavior by invoking traceroute with
different source IPs and checking that the ICMP error message is
generated with a source IP in the same subnet.

Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
---
 tools/testing/selftests/net/traceroute.sh | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

Reviewed-by: David Ahern <dsahern@kernel.org>