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Eric Dumazet f1a3b283f8 net_sched: sch_fq: better validate TCA_FQ_WEIGHTS and TCA_FQ_PRIOMAP 
syzbot was able to trigger the following report while providing
too small TCA_FQ_WEIGHTS attribute [1]

Fix is to use NLA_POLICY_EXACT_LEN() to ensure user space
provided correct sizes.

Apply the same fix to TCA_FQ_PRIOMAP.

[1]
BUG: KMSAN: uninit-value in fq_load_weights net/sched/sch_fq.c:960 [inline]
BUG: KMSAN: uninit-value in fq_change+0x1348/0x2fe0 net/sched/sch_fq.c:1071
fq_load_weights net/sched/sch_fq.c:960 [inline]
fq_change+0x1348/0x2fe0 net/sched/sch_fq.c:1071
fq_init+0x68e/0x780 net/sched/sch_fq.c:1159
qdisc_create+0x12f3/0x1be0 net/sched/sch_api.c:1326
tc_modify_qdisc+0x11ef/0x2c20
rtnetlink_rcv_msg+0x16a6/0x1840 net/core/rtnetlink.c:6558
netlink_rcv_skb+0x371/0x650 net/netlink/af_netlink.c:2545
rtnetlink_rcv+0x34/0x40 net/core/rtnetlink.c:6576
netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline]
netlink_unicast+0xf47/0x1250 net/netlink/af_netlink.c:1368
netlink_sendmsg+0x1238/0x13d0 net/netlink/af_netlink.c:1910
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
____sys_sendmsg+0x9c2/0xd60 net/socket.c:2588
___sys_sendmsg+0x28d/0x3c0 net/socket.c:2642
__sys_sendmsg net/socket.c:2671 [inline]
__do_sys_sendmsg net/socket.c:2680 [inline]
__se_sys_sendmsg net/socket.c:2678 [inline]
__x64_sys_sendmsg+0x307/0x490 net/socket.c:2678
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x63/0x6b

Uninit was created at:
slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768
slab_alloc_node mm/slub.c:3478 [inline]
kmem_cache_alloc_node+0x5e9/0xb10 mm/slub.c:3523
kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:560
__alloc_skb+0x318/0x740 net/core/skbuff.c:651
alloc_skb include/linux/skbuff.h:1286 [inline]
netlink_alloc_large_skb net/netlink/af_netlink.c:1214 [inline]
netlink_sendmsg+0xb34/0x13d0 net/netlink/af_netlink.c:1885
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
____sys_sendmsg+0x9c2/0xd60 net/socket.c:2588
___sys_sendmsg+0x28d/0x3c0 net/socket.c:2642
__sys_sendmsg net/socket.c:2671 [inline]
__do_sys_sendmsg net/socket.c:2680 [inline]
__se_sys_sendmsg net/socket.c:2678 [inline]
__x64_sys_sendmsg+0x307/0x490 net/socket.c:2678
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x63/0x6b

CPU: 1 PID: 5001 Comm: syz-executor300 Not tainted 6.6.0-syzkaller-12401-g8f6f76a6a29f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023

Fixes: 29f834aa32 ("net_sched: sch_fq: add 3 bands and WRR scheduling")
Fixes: 49e7265fd0 ("net_sched: sch_fq: add TCA_FQ_WEIGHTS attribute")
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Jamal Hadi Salim<jhs@mojatatu.com>
Link: https://lore.kernel.org/r/20231107160440.1992526-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 		2023-11-08 18:30:21 -08:00
..
Kconfig bpf: Add fd-based tcx multi-prog infra with link support 2023-07-19 10:07:27 -07:00
Makefile net/sched: Retire rsvp classifier 2023-02-16 09:27:07 +01:00
act_api.c net, sched: Fix SKB_NOT_DROPPED_YET splat under debug config 2023-11-06 08:56:25 +00:00
act_bpf.c net/sched: avoid indirect act functions on retpoline kernels 2022-12-09 09:18:07 +00:00
act_connmark.c net/sched: act_connmark: handle errno on tcf_idr_check_alloc 2023-03-01 08:19:09 +00:00
act_csum.c net: skbuff: hide csum_not_inet when CONFIG_IP_SCTP not set 2023-04-19 13:04:30 +01:00
act_ct.c net/sched: act_ct: Always fill offloading tuple iifidx 2023-11-08 17:47:08 -08:00
act_ctinfo.c net/sched: act_ctinfo: use percpu stats 2023-02-13 20:09:01 -08:00
act_gact.c Networking changes for 6.2. 2022-12-13 15:47:48 -08:00
act_gate.c net: sched: Fill in MODULE_DESCRIPTION for act_gate 2023-11-01 21:49:08 -07:00
act_ife.c net/sched: avoid indirect act functions on retpoline kernels 2022-12-09 09:18:07 +00:00
act_ipt.c net/sched: act_ipt: zero skb->cb before calling target 2023-06-29 12:10:37 +02:00
act_meta_mark.c
…
act_meta_skbprio.c
…
act_meta_skbtcindex.c
…
act_mirred.c net/sched: act_mirred: Add carrier check 2023-05-01 07:26:10 +01:00
act_mpls.c net/sched: remove two skb_mac_header() uses 2023-03-22 22:43:23 -07:00
act_nat.c net/sched: act_nat: transition to percpu stats and rcu 2023-02-16 10:39:28 +01:00
act_pedit.c net/sched: act_pedit: Add size check for TCA_PEDIT_PARMS_EX 2023-07-04 10:31:38 +02:00
act_police.c net: move gso declarations and functions to their own files 2023-06-10 00:11:41 -07:00
act_sample.c net/sched: act_sample: fix action bind logic 2023-02-26 18:27:45 +00:00
act_simple.c net/sched: avoid indirect act functions on retpoline kernels 2022-12-09 09:18:07 +00:00
act_skbedit.c net/sched: avoid indirect act functions on retpoline kernels 2022-12-09 09:18:07 +00:00
act_skbmod.c net/sched: avoid indirect act functions on retpoline kernels 2022-12-09 09:18:07 +00:00
act_tunnel_key.c net/sched: act_tunnel_key: add support for "don't fragment" 2023-03-30 23:24:24 -07:00
act_vlan.c net/sched: avoid indirect act functions on retpoline kernels 2022-12-09 09:18:07 +00:00
cls_api.c net, sched: Fix SKB_NOT_DROPPED_YET splat under debug config 2023-11-06 08:56:25 +00:00
cls_basic.c net: sched: Fill in missing MODULE_DESCRIPTION for classifiers 2023-11-01 21:49:09 -07:00
cls_bpf.c net: sched: cls_bpf: Undo tcf_bind_filter in case of an error 2023-07-17 07:33:39 +01:00
cls_cgroup.c net: sched: Fill in missing MODULE_DESCRIPTION for classifiers 2023-11-01 21:49:09 -07:00
cls_flow.c treewide: Convert del_timer*() to timer_shutdown*() 2022-12-25 13:38:09 -08:00
cls_flower.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2023-08-03 14:34:37 -07:00
cls_fw.c net: sched: Fill in missing MODULE_DESCRIPTION for classifiers 2023-11-01 21:49:09 -07:00
cls_matchall.c net: sched: cls_matchall: Undo tcf_bind_filter in case of failure after mall_set_parms 2023-07-17 07:33:38 +01:00
cls_route.c net: sched: Fill in missing MODULE_DESCRIPTION for classifiers 2023-11-01 21:49:09 -07:00
cls_u32.c net: sched: Fill in missing MODULE_DESCRIPTION for classifiers 2023-11-01 21:49:09 -07:00
em_canid.c
…
em_cmp.c
…
em_ipset.c
…
em_ipt.c
…
em_meta.c net: implement lockless SO_PRIORITY 2023-10-01 19:09:54 +01:00
em_nbyte.c
…
em_text.c
…
em_u32.c
…
ematch.c net_sched: reject TCF_EM_SIMPLE case for complex ematch module 2022-12-19 09:43:18 +00:00
sch_api.c net/sched: fix a qdisc modification with ambiguous command request 2023-08-23 09:44:48 +01:00
sch_blackhole.c
…
sch_cake.c net: move gso declarations and functions to their own files 2023-06-10 00:11:41 -07:00
sch_cbs.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_choke.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_codel.c net: sched: remove redundant NULL check in change hook function 2022-09-01 08:06:45 +02:00
sch_drr.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_etf.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_ets.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_fifo.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_fq.c net_sched: sch_fq: better validate TCA_FQ_WEIGHTS and TCA_FQ_PRIOMAP 2023-11-08 18:30:21 -08:00
sch_fq_codel.c Revert "net: sched: fq_codel: remove redundant resource cleanup in fq_codel_init()" 2022-10-19 13:47:09 +01:00
sch_fq_pie.c netlink: make range pointers in policies const 2023-10-26 16:24:09 -07:00
sch_frag.c net: dst: remove unnecessary input parameter in dst_alloc and dst_init 2023-09-12 11:42:25 +02:00
sch_generic.c net_sched: export pfifo_fast prio2band[] 2023-10-05 13:27:31 +02:00
sch_gred.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_hfsc.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_hhf.c net: sched: remove redundant NULL check in change hook function 2022-09-01 08:06:45 +02:00
sch_htb.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_ingress.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_mq.c net: sched: add rcu annotations around qdisc->qdisc_sleeping 2023-06-07 10:25:39 +01:00
sch_mqprio.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_mqprio_lib.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_mqprio_lib.h net/sched: mqprio: allow per-TC user input of FP adminStatus 2023-04-13 22:22:10 -07:00
sch_multiq.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_netem.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_pie.c net: sched: add rcu annotations around qdisc->qdisc_sleeping 2023-06-07 10:25:39 +01:00
sch_plug.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_prio.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_qfq.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_red.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_sfb.c Networking fixes for 6.1-rc2, including fixes from netfilter 2022-10-20 17:24:59 -07:00
sch_sfq.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_skbprio.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_taprio.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_tbf.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00
sch_teql.c net: sched: Fill in missing MODULE_DESCRIPTION for qdiscs 2023-11-01 21:49:09 -07:00