linux/tools
Ido Schimmel d5082d386e ipv4: Fix route deletion when nexthop info is not specified
When the kernel receives a route deletion request from user space it
tries to delete a route that matches the route attributes specified in
the request.

If only prefix information is specified in the request, the kernel
should delete the first matching FIB alias regardless of its associated
FIB info. However, an error is currently returned when the FIB info is
backed by a nexthop object:

 # ip nexthop add id 1 via 192.0.2.2 dev dummy10
 # ip route add 198.51.100.0/24 nhid 1
 # ip route del 198.51.100.0/24
 RTNETLINK answers: No such process

Fix by matching on such a FIB info when legacy nexthop attributes are
not specified in the request. An earlier check already covers the case
where a nexthop ID is specified in the request.

Add tests that cover these flows. Before the fix:

 # ./fib_nexthops.sh -t ipv4_fcnal
 ...
 TEST: Delete route when not specifying nexthop attributes           [FAIL]

 Tests passed:  11
 Tests failed:   1

After the fix:

 # ./fib_nexthops.sh -t ipv4_fcnal
 ...
 TEST: Delete route when not specifying nexthop attributes           [ OK ]

 Tests passed:  12
 Tests failed:   0

No regressions in other tests:

 # ./fib_nexthops.sh
 ...
 Tests passed: 228
 Tests failed:   0

 # ./fib_tests.sh
 ...
 Tests passed: 186
 Tests failed:   0

Cc: stable@vger.kernel.org
Reported-by: Jonas Gorski <jonas.gorski@gmail.com>
Tested-by: Jonas Gorski <jonas.gorski@gmail.com>
Fixes: 493ced1ac4 ("ipv4: Allow routes to use nexthop objects")
Fixes: 6bf92d70e6 ("net: ipv4: fix route with nexthop object delete warning")
Fixes: 61b91eb33a ("ipv4: Handle attempt to delete multipath route when fib_info contains an nh reference")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20221124210932.2470010-1-idosch@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-11-28 16:56:04 -08:00
..
accounting
arch x86/cpu: Restore AMD's DE_CFG MSR after resume 2022-11-15 10:15:58 -08:00
bootconfig
bpf bpftool: Fix NULL pointer dereference when pin {PROG, MAP, LINK} without FILE 2022-11-02 12:05:42 +01:00
build perf bpf: Fix build with libbpf 0.7.0 by checking if bpf_program__set_insns() is available 2022-10-25 17:40:48 -03:00
certs
cgroup iocost_monitor: reorder BlkgIterator 2022-09-23 16:57:10 -10:00
counter
debugging tools: Add new "test" taint to kernel-chktaint 2022-09-07 14:51:12 -06:00
edid
firewire
firmware
gpio
hv tools: hv: kvp: remove unnecessary (void*) conversions 2022-09-05 16:55:20 +00:00
iio tools: iio: iio_utils: fix digit calculation 2022-10-17 08:51:26 +01:00
include bpf-for-netdev 2022-11-03 19:51:02 -07:00
io_uring
kvm/kvm_stat tools/kvm_stat: update exit reasons for vmx/svm/aarch64/userspace 2022-11-09 12:26:52 -05:00
laptop
leds
lib libperf: Do not include non-UAPI linux/compiler.h header 2022-10-14 10:44:20 -03:00
memory-model
objtool - Yu Zhao's Multi-Gen LRU patches are here. They've been under test in 2022-10-10 17:53:04 -07:00
pci
pcmcia
perf perf tools: Add the include/perf/ directory to .gitignore 2022-11-08 18:54:41 -03:00
power pm-graph v5.10 2022-10-25 17:46:15 +02:00
rcu
scripts
spi
testing ipv4: Fix route deletion when nexthop info is not specified 2022-11-28 16:56:04 -08:00
thermal
time
tracing
usb
verification rv/dot2c: Make automaton definition static 2022-10-20 16:02:45 -04:00
virtio virtio_test: fixup for vq reset 2022-09-27 18:30:49 -04:00
vm tools/vm/page_owner_sort: fix -f option 2022-09-11 20:25:51 -07:00
wmi
Makefile