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author | Guillaume Nault <gnault@redhat.com> | 2022-02-04 16:58:16 +0300 |
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committer | Jakub Kicinski <kuba@kernel.org> | 2022-02-08 07:12:46 +0300 |
commit | f55fbb6afb8d701e3185e31e73f5ea9503a66744 (patch) | |
tree | 884a144830e7b98ccf4fdf1e138b73aaff01e40a /net/ipv4/fib_semantics.c | |
parent | 563f8e97e054451d167327336a53b7381517a998 (diff) | |
download | linux-f55fbb6afb8d701e3185e31e73f5ea9503a66744.tar.xz |
ipv4: Reject routes specifying ECN bits in rtm_tos
Use the new dscp_t type to replace the fc_tos field of fib_config, to
ensure IPv4 routes aren't influenced by ECN bits when configured with
non-zero rtm_tos.
Before this patch, IPv4 routes specifying an rtm_tos with some of the
ECN bits set were accepted. However they wouldn't work (never match) as
IPv4 normally clears the ECN bits with IPTOS_RT_MASK before doing a FIB
lookup (although a few buggy code paths don't).
After this patch, IPv4 routes specifying an rtm_tos with any ECN bit
set is rejected.
Note: IPv6 routes ignore rtm_tos altogether, any rtm_tos is accepted,
but treated as if it were 0.
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Acked-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv4/fib_semantics.c')
0 files changed, 0 insertions, 0 deletions