Pedro Tammela 42018a322b net/sched: tcindex: search key must be 16 bits ... Syzkaller found an issue where a handle greater than 16 bits would trigger a null-ptr-deref in the imperfect hash area update. general protection fault, probably for non-canonical address 0xdffffc0000000015: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000000a8-0x00000000000000af] CPU: 0 PID: 5070 Comm: syz-executor456 Not tainted 6.2.0-rc7-syzkaller-00112-gc68f345b7c42 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 RIP: 0010:tcindex_set_parms+0x1a6a/0x2990 net/sched/cls_tcindex.c:509 Code: 01 e9 e9 fe ff ff 4c 8b bd 28 fe ff ff e8 0e 57 7d f9 48 8d bb a8 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 94 0c 00 00 48 8b 85 f8 fd ff ff 48 8b 9b a8 00 RSP: 0018:ffffc90003d3ef88 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000015 RSI: ffffffff8803a102 RDI: 00000000000000a8 RBP: ffffc90003d3f1d8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff88801e2b10a8 R13: dffffc0000000000 R14: 0000000000030000 R15: ffff888017b3be00 FS: 00005555569af300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056041c6d2000 CR3: 000000002bfca000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> tcindex_change+0x1ea/0x320 net/sched/cls_tcindex.c:572 tc_new_tfilter+0x96e/0x2220 net/sched/cls_api.c:2155 rtnetlink_rcv_msg+0x959/0xca0 net/core/rtnetlink.c:6132 netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2574 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x91b/0xe10 net/netlink/af_netlink.c:1942 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xd3/0x120 net/socket.c:734 ____sys_sendmsg+0x334/0x8c0 net/socket.c:2476 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2530 __sys_sendmmsg+0x18f/0x460 net/socket.c:2616 __do_sys_sendmmsg net/socket.c:2645 [inline] __se_sys_sendmmsg net/socket.c:2642 [inline] __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2642 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 Fixes: ee059170b1 ("net/sched: tcindex: update imperfect hash filters respecting rcu") Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Pedro Tammela <pctammela@mojatatu.com> Reported-by: syzbot <syzkaller@googlegroups.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2023-02-15 10:23:54 +00:00
..
act_api.c
act_bpf.c
act_connmark.c
act_csum.c
act_ct.c
act_ctinfo.c	net/sched: act_ctinfo: use percpu stats	2023-02-13 20:09:01 -08:00
act_gact.c
act_gate.c
act_ife.c
act_ipt.c
act_meta_mark.c
act_meta_skbprio.c
act_meta_skbtcindex.c
act_mirred.c
act_mpls.c	net/sched: act_mpls: Fix warning during failed attribute validation	2023-01-09 19:38:35 -08:00
act_nat.c
act_pedit.c
act_police.c
act_sample.c
act_simple.c
act_skbedit.c
act_skbmod.c
act_tunnel_key.c
act_vlan.c
cls_api.c
cls_basic.c
cls_bpf.c
cls_cgroup.c
cls_flow.c	treewide: Convert del_timer*() to timer_shutdown*()	2022-12-25 13:38:09 -08:00
cls_flower.c
cls_fw.c
cls_matchall.c
cls_route.c
cls_rsvp.c
cls_rsvp.h
cls_rsvp6.c
cls_tcindex.c	net/sched: tcindex: search key must be 16 bits	2023-02-15 10:23:54 +00:00
cls_u32.c
em_canid.c
em_cmp.c
em_ipset.c
em_ipt.c
em_meta.c
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
Kconfig
Makefile
sch_api.c	net: sched: disallow noqueue for qdisc classes	2023-01-10 18:19:32 -08:00
sch_atm.c	net: sched: atm: dont intepret cls results when asked to drop	2023-01-02 13:32:43 +00:00
sch_blackhole.c
sch_cake.c
sch_cbq.c	net: sched: cbq: dont intepret cls results when asked to drop	2023-01-02 13:32:43 +00:00
sch_cbs.c
sch_choke.c
sch_codel.c
sch_drr.c
sch_dsmark.c
sch_etf.c
sch_ets.c
sch_fifo.c
sch_fq.c
sch_fq_codel.c
sch_fq_pie.c
sch_frag.c
sch_generic.c
sch_gred.c	net: sched: gred: prevent races when adding offloads to stats	2023-01-18 20:28:25 -08:00
sch_hfsc.c
sch_hhf.c
sch_htb.c	net: sched: sch: Fix off by one in htb_activate_prios()	2023-02-07 23:38:53 -08:00
sch_ingress.c
sch_mq.c
sch_mqprio.c
sch_multiq.c
sch_netem.c
sch_pie.c
sch_plug.c
sch_prio.c
sch_qfq.c
sch_red.c
sch_sfb.c
sch_sfq.c
sch_skbprio.c
sch_taprio.c	net/sched: sch_taprio: do not schedule in taprio_reset()	2023-01-24 18:17:29 -08:00
sch_tbf.c
sch_teql.c