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Toke Høiland-Jørgensen 382778edc8 xdp: check prog type before updating BPF link 
The bpf_xdp_link_update() function didn't check the program type before
updating the program, which made it possible to install any program type as
an XDP program, which is obviously not good. Syzbot managed to trigger this
by swapping in an LWT program on the XDP hook which would crash in a helper
call.

Fix this by adding a check and bailing out if the types don't match.

Fixes: 026a4c28e1db ("bpf, xdp: Implement LINK_UPDATE for BPF XDP link")
Reported-by: syzbot+983941aa85af6ded1fd9@syzkaller.appspotmail.com
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/r/20220107221115.326171-1-toke@redhat.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2022-01-11 09:44:06 -08:00
..
bpf_sk_storage.c
bpf: Allow bpf_local_storage to be used by sleepable programs
2021-12-29 17:54:40 -08:00
datagram.c
net: avoid double accounting for pure zerocopy skbs
2021-11-03 11:19:49 +00:00
datagram.h
…
dev_addr_lists_test.c
net: kunit: add a test for dev_addr_lists
2021-11-20 12:25:57 +00:00
dev_addr_lists.c
dev_addr_list: put the first addr on the tree
2021-11-20 12:25:57 +00:00
dev_ioctl.c
net_tstamp: add new flag HWTSTAMP_FLAG_BONDED_PHC_INDEX
2021-12-14 12:28:24 +00:00
dev.c
xdp: check prog type before updating BPF link
2022-01-11 09:44:06 -08:00
devlink.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
2021-12-31 14:35:40 +00:00
drop_monitor.c
net: skb: introduce kfree_skb_reason()
2022-01-09 16:30:34 -08:00
dst_cache.c
wireguard: device: reset peer src endpoint when netns exits
2021-11-29 19:50:45 -08:00
dst.c
net: dst: add net device refcount tracking to dst_entry
2021-12-06 16:05:10 -08:00
failover.c
net: failover: add net device refcount tracker
2021-12-06 16:06:02 -08:00
fib_notifier.c
…
fib_rules.c
fib: expand fib_rule_policy
2021-12-16 07:18:35 -08:00
filter.c
xdp: Add xdp_do_redirect_frame() for pre-computed xdp_frames
2022-01-05 19:46:32 -08:00
flow_dissector.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
2021-12-31 14:35:40 +00:00
flow_offload.c
flow_offload: add reoffload process to update hw_count
2021-12-19 14:08:48 +00:00
gen_estimator.c
net: sched: Remove Qdisc::running sequence counter
2021-10-18 12:54:41 +01:00
gen_stats.c
net: stats: Read the statistics in ___gnet_stats_copy_basic() instead of adding.
2021-10-21 12:47:56 +01:00
gro_cells.c
gro_cells: reduce number of synchronize_net() calls
2020-11-25 11:28:12 -08:00
gro.c
gro: add ability to control gro max packet size
2022-01-06 12:27:05 +00:00
hwbm.c
…
link_watch.c
net: linkwatch: be more careful about dev->linkwatch_dev_tracker
2021-12-14 18:45:58 -08:00
lwt_bpf.c
net: Don't include filter.h from net/sock.h
2021-12-29 08:48:14 -08:00
lwtunnel.c
lwtunnel: Validate RTA_ENCAP_TYPE attribute length
2021-12-31 14:31:59 +00:00
Makefile
net: kunit: add a test for dev_addr_lists
2021-11-20 12:25:57 +00:00
neighbour.c
net: Enable neighbor sysctls that is save for userns root
2021-12-12 12:34:38 +00:00
net_namespace.c
net: add networking namespace refcount tracker
2021-12-10 06:38:26 -08:00
net-procfs.c
Revert "net: procfs: add seq_puts() statement for dev_mcast"
2021-10-13 17:24:38 -07:00
net-sysfs.c
net-sysfs: warn if new queue objects are being created during device unregistration
2021-12-08 18:36:32 -08:00
net-sysfs.h
net-sysfs: add netdev_change_owner()
2020-02-26 20:07:25 -08:00
net-traces.c
tcp: add tracepoint for checksum errors
2021-05-14 15:26:03 -07:00
netclassid_cgroup.c
bpf, cgroups: Fix cgroup v2 fallback on v1/v2 mixed mode
2021-09-13 16:35:58 -07:00
netevent.c
net: core: Correct function name netevent_unregister_notifier() in the kerneldoc
2021-03-28 17:56:56 -07:00
netpoll.c
netpoll: add net device refcount tracker to struct netpoll
2021-12-06 16:06:02 -08:00
netprio_cgroup.c
bpf, cgroups: Fix cgroup v2 fallback on v1/v2 mixed mode
2021-09-13 16:35:58 -07:00
of_net.c
of: net: support NVMEM cells with MAC in text format
2021-12-29 11:32:58 +00:00
page_pool.c
page_pool: remove spinlock in page_pool_refill_alloc_cache()
2022-01-09 16:45:27 -08:00
pktgen.c
Revert "pktgen: use min() to make code cleaner"
2021-12-14 12:53:41 +00:00
ptp_classifier.c
bpf: Refactor BPF_PROG_RUN into a function
2021-08-17 00:45:07 +02:00
request_sock.c
…
rtnetlink.c
gro: add ability to control gro max packet size
2022-01-06 12:27:05 +00:00
scm.c
memcg: enable accounting for scm_fp_list objects
2021-07-20 06:00:38 -07:00
secure_seq.c
net: align static siphash keys
2021-11-16 19:07:54 -08:00
selftests.c
net: core: constify mac addrs in selftests
2021-10-24 13:59:44 +01:00
skbuff.c
net: skb: introduce kfree_skb_reason()
2022-01-09 16:30:34 -08:00
skmsg.c
bpf, sockmap: Re-evaluate proto ops when psock is removed from sockmap
2021-11-20 00:56:24 +01:00
sock_destructor.h
skb_expand_head() adjust skb->truesize incorrectly
2021-10-22 12:35:51 -07:00
sock_diag.c
net: Don't include filter.h from net/sock.h
2021-12-29 08:48:14 -08:00
sock_map.c
bpf, sockmap: Fix double bpf_prog_put on error case in map_link
2022-01-05 20:43:08 +01:00
sock_reuseport.c
tcp: Add stats for socket migration.
2021-06-23 12:56:08 -07:00
sock.c
sock: Use sock_owned_by_user_nocheck() instead of sk_lock.owned.
2021-12-10 19:43:00 -08:00
stream.c
net: stream: don't purge sk_error_queue in sk_stream_kill_queues()
2021-10-16 09:06:09 +01:00
sysctl_net_core.c
net: Don't include filter.h from net/sock.h
2021-12-29 08:48:14 -08:00
timestamping.c
net: Introduce a new MII time stamping interface.
2019-12-25 19:51:33 -08:00
tso.c
net: tso: add UDP segmentation support
2020-06-18 20:46:23 -07:00
utils.c
net: Fix skb->csum update in inet_proto_csum_replace16().
2020-01-24 20:54:30 +01:00
xdp.c
page_pool: Store the XDP mem id
2022-01-05 19:46:32 -08:00