Re: [PATCH net] seg6: Fix validation of nexthop addresses

On 6/4/25 5:32 AM, Ido Schimmel wrote:

The kernel currently validates that the length of the provided nexthop
address does not exceed the specified length. This can lead to the
kernel reading uninitialized memory if user space provided a shorter
length than the specified one.

Fix by validating that the provided length exactly matches the specified
one.

Fixes: d1df6fd8a1d2 ("ipv6: sr: define core operations for seg6local lightweight tunnel")
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
---
Noticed this while extending End.X behavior with oif support.
---
 net/ipv6/seg6_local.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

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