Eric Dumazet e7be569263 net: sched: fix use-after-free in tc_new_tfilter() ... commit 04c2a47ffb upstream. Whenever tc_new_tfilter() jumps back to replay: label, we need to make sure @q and @chain local variables are cleared again, or risk use-after-free as in [1] For consistency, apply the same fix in tc_ctl_chain() BUG: KASAN: use-after-free in mini_qdisc_pair_swap+0x1b9/0x1f0 net/sched/sch_generic.c:1581 Write of size 8 at addr ffff8880985c4b08 by task syz-executor.4/1945 CPU: 0 PID: 1945 Comm: syz-executor.4 Not tainted 5.17.0-rc1-syzkaller-00495-gff58831fa02d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0x8d/0x336 mm/kasan/report.c:255 __kasan_report mm/kasan/report.c:442 [inline] kasan_report.cold+0x83/0xdf mm/kasan/report.c:459 mini_qdisc_pair_swap+0x1b9/0x1f0 net/sched/sch_generic.c:1581 tcf_chain_head_change_item net/sched/cls_api.c:372 [inline] tcf_chain0_head_change.isra.0+0xb9/0x120 net/sched/cls_api.c:386 tcf_chain_tp_insert net/sched/cls_api.c:1657 [inline] tcf_chain_tp_insert_unique net/sched/cls_api.c:1707 [inline] tc_new_tfilter+0x1e67/0x2350 net/sched/cls_api.c:2086 rtnetlink_rcv_msg+0x80d/0xb80 net/core/rtnetlink.c:5583 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x539/0x7e0 net/netlink/af_netlink.c:1343 netlink_sendmsg+0x904/0xe00 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:725 ____sys_sendmsg+0x331/0x810 net/socket.c:2413 ___sys_sendmsg+0xf3/0x170 net/socket.c:2467 __sys_sendmmsg+0x195/0x470 net/socket.c:2553 __do_sys_sendmmsg net/socket.c:2582 [inline] __se_sys_sendmmsg net/socket.c:2579 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2579 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f2647172059 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2645aa5168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f2647285100 RCX: 00007f2647172059 RDX: 040000000000009f RSI: 00000000200002c0 RDI: 0000000000000006 RBP: 00007f26471cc08d R08: 0000000000000000 R09: 0000000000000000 R10: 9e00000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffb3f7f02f R14: 00007f2645aa5300 R15: 0000000000022000 </TASK> Allocated by task 1944: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] ____kasan_kmalloc mm/kasan/common.c:515 [inline] ____kasan_kmalloc mm/kasan/common.c:474 [inline] __kasan_kmalloc+0xa9/0xd0 mm/kasan/common.c:524 kmalloc_node include/linux/slab.h:604 [inline] kzalloc_node include/linux/slab.h:726 [inline] qdisc_alloc+0xac/0xa10 net/sched/sch_generic.c:941 qdisc_create.constprop.0+0xce/0x10f0 net/sched/sch_api.c:1211 tc_modify_qdisc+0x4c5/0x1980 net/sched/sch_api.c:1660 rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5592 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x539/0x7e0 net/netlink/af_netlink.c:1343 netlink_sendmsg+0x904/0xe00 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:725 ____sys_sendmsg+0x331/0x810 net/socket.c:2413 ___sys_sendmsg+0xf3/0x170 net/socket.c:2467 __sys_sendmmsg+0x195/0x470 net/socket.c:2553 __do_sys_sendmmsg net/socket.c:2582 [inline] __se_sys_sendmmsg net/socket.c:2579 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2579 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 3609: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:45 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free+0x130/0x160 mm/kasan/common.c:328 kasan_slab_free include/linux/kasan.h:236 [inline] slab_free_hook mm/slub.c:1728 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1754 slab_free mm/slub.c:3509 [inline] kfree+0xcb/0x280 mm/slub.c:4562 rcu_do_batch kernel/rcu/tree.c:2527 [inline] rcu_core+0x7b8/0x1540 kernel/rcu/tree.c:2778 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 Last potentially related work creation: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 __kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348 __call_rcu kernel/rcu/tree.c:3026 [inline] call_rcu+0xb1/0x740 kernel/rcu/tree.c:3106 qdisc_put_unlocked+0x6f/0x90 net/sched/sch_generic.c:1109 tcf_block_release+0x86/0x90 net/sched/cls_api.c:1238 tc_new_tfilter+0xc0d/0x2350 net/sched/cls_api.c:2148 rtnetlink_rcv_msg+0x80d/0xb80 net/core/rtnetlink.c:5583 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x539/0x7e0 net/netlink/af_netlink.c:1343 netlink_sendmsg+0x904/0xe00 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:725 ____sys_sendmsg+0x331/0x810 net/socket.c:2413 ___sys_sendmsg+0xf3/0x170 net/socket.c:2467 __sys_sendmmsg+0x195/0x470 net/socket.c:2553 __do_sys_sendmmsg net/socket.c:2582 [inline] __se_sys_sendmmsg net/socket.c:2579 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2579 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff8880985c4800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 776 bytes inside of 1024-byte region [ffff8880985c4800, ffff8880985c4c00) The buggy address belongs to the page: page:ffffea0002617000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x985c0 head:ffffea0002617000 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888010c41dc0 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 1941, ts 1038999441284, free_ts 1033444432829 prep_new_page mm/page_alloc.c:2434 [inline] get_page_from_freelist+0xa72/0x2f50 mm/page_alloc.c:4165 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5389 alloc_pages+0x1aa/0x310 mm/mempolicy.c:2271 alloc_slab_page mm/slub.c:1799 [inline] allocate_slab mm/slub.c:1944 [inline] new_slab+0x28a/0x3b0 mm/slub.c:2004 ___slab_alloc+0x87c/0xe90 mm/slub.c:3018 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3105 slab_alloc_node mm/slub.c:3196 [inline] slab_alloc mm/slub.c:3238 [inline] __kmalloc+0x2fb/0x340 mm/slub.c:4420 kmalloc include/linux/slab.h:586 [inline] kzalloc include/linux/slab.h:715 [inline] __register_sysctl_table+0x112/0x1090 fs/proc/proc_sysctl.c:1335 neigh_sysctl_register+0x2c8/0x5e0 net/core/neighbour.c:3787 devinet_sysctl_register+0xb1/0x230 net/ipv4/devinet.c:2618 inetdev_init+0x286/0x580 net/ipv4/devinet.c:278 inetdev_event+0xa8a/0x15d0 net/ipv4/devinet.c:1532 notifier_call_chain+0xb5/0x200 kernel/notifier.c:84 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1919 call_netdevice_notifiers_extack net/core/dev.c:1931 [inline] call_netdevice_notifiers net/core/dev.c:1945 [inline] register_netdevice+0x1073/0x1500 net/core/dev.c:9698 veth_newlink+0x59c/0xa90 drivers/net/veth.c:1722 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1352 [inline] free_pcp_prepare+0x374/0x870 mm/page_alloc.c:1404 free_unref_page_prepare mm/page_alloc.c:3325 [inline] free_unref_page+0x19/0x690 mm/page_alloc.c:3404 release_pages+0x748/0x1220 mm/swap.c:956 tlb_batch_pages_flush mm/mmu_gather.c:50 [inline] tlb_flush_mmu_free mm/mmu_gather.c:243 [inline] tlb_flush_mmu+0xe9/0x6b0 mm/mmu_gather.c:250 zap_pte_range mm/memory.c:1441 [inline] zap_pmd_range mm/memory.c:1490 [inline] zap_pud_range mm/memory.c:1519 [inline] zap_p4d_range mm/memory.c:1540 [inline] unmap_page_range+0x1d1d/0x2a30 mm/memory.c:1561 unmap_single_vma+0x198/0x310 mm/memory.c:1606 unmap_vmas+0x16b/0x2f0 mm/memory.c:1638 exit_mmap+0x201/0x670 mm/mmap.c:3178 __mmput+0x122/0x4b0 kernel/fork.c:1114 mmput+0x56/0x60 kernel/fork.c:1135 exit_mm kernel/exit.c:507 [inline] do_exit+0xa3c/0x2a30 kernel/exit.c:793 do_group_exit+0xd2/0x2f0 kernel/exit.c:935 __do_sys_exit_group kernel/exit.c:946 [inline] __se_sys_exit_group kernel/exit.c:944 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:944 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae Memory state around the buggy address: ffff8880985c4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880985c4a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880985c4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880985c4b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880985c4c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc Fixes: 470502de5b ("net: sched: unlock rules update API") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Vlad Buslov <vladbu@mellanox.com> Cc: Jiri Pirko <jiri@mellanox.com> Cc: Cong Wang <xiyou.wangcong@gmail.com> Reported-by: syzbot <syzkaller@googlegroups.com> Link: https://lore.kernel.org/r/20220131172018.3704490-1-eric.dumazet@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-02-05 12:37:56 +01:00
..
6lowpan	6lowpan: iphc: Fix an off-by-one check of array index	2021-09-15 09:50:34 +02:00
9p	9p/net: fix missing error check in p9_check_errors	2021-11-18 14:04:29 +01:00
802	net/802/garp: fix memleak in garp_request_join()	2021-07-31 08:16:11 +02:00
8021q	net: vlan: fix underflow for the real_dev refcnt	2021-12-01 09:19:08 +01:00
appletalk	appletalk: Fix skb allocation size in loopback case	2021-04-07 15:00:08 +02:00
atm
ax25	ax25: uninitialized variable in ax25_setsockopt()	2022-01-27 10:54:03 +01:00
batman-adv	batman-adv: allow netlink usage in unprivileged containers	2022-01-27 10:54:11 +01:00
bluetooth	Bluetooth: refactor malicious adv data check	2022-02-01 17:25:38 +01:00
bpf	bpf, test, cgroup: Use sk_{alloc,free} for test cases	2021-10-27 09:56:56 +02:00
bpfilter	bpfilter: Specify the log level for the kmsg message	2021-07-14 16:56:29 +02:00
bridge	net: bridge: vlan: fix memory leak in __allowed_ingress	2022-02-01 17:25:48 +01:00
caif	net-caif: avoid user-triggerable WARN_ON(1)	2021-09-22 12:27:56 +02:00
can	can: isotp: convert struct tpcon::{idx,len} to unsigned int	2022-01-16 09:14:23 +01:00
ceph
core	net-procfs: show net devices bound packet types	2022-02-01 17:25:44 +01:00
dcb
dccp	tcp: switch orphan_count to bare per-cpu counters	2021-11-18 14:04:08 +01:00
decnet	net: decnet: Fix sleeping inside in af_decnet	2021-07-28 14:35:38 +02:00
dns_resolver
dsa	net: dsa: don't allocate the slave_mii_bus using devres	2021-09-30 10:11:02 +02:00
ethernet
ethtool	ethtool: do not perform operations on net devices being unregistered	2021-12-17 10:14:41 +01:00
hsr	net: hsr: fix mac_len checks	2021-06-03 09:00:50 +02:00
ieee802154	net: Fix memory leak in ieee802154_raw_deliver	2021-08-18 08:59:12 +02:00
ife
ipv4	ipv4: tcp: send zero IPID in SYNACK messages	2022-02-01 17:25:47 +01:00
ipv6	Revert "ipv6: Honor all IPv6 PIO Valid Lifetime values"	2022-02-01 17:25:47 +01:00
iucv	net/af_iucv: remove WARN_ONCE on malformed RX packets	2021-03-07 12:34:05 +01:00
kcm
key
l2tp	net/l2tp: Fix reference count leak in l2tp_udp_recv_core	2021-09-22 12:27:56 +02:00
l3mdev
lapb
llc	net: llc: fix skb_over_panic	2021-08-04 12:46:43 +02:00
mac80211	mac80211: allow non-standard VHT MCS-10/11	2022-01-27 10:54:19 +01:00
mac802154	net: mac802154: Fix general protection fault	2021-04-14 08:42:13 +02:00
mpls	net: mpls: Fix notifications when deleting a device	2021-12-08 09:03:23 +01:00
mptcp	mptcp: clear 'kern' flag from fallback sockets	2021-12-22 09:30:54 +01:00
ncsi	net/ncsi: check for error return from call to nla_put_u32	2022-01-05 12:40:32 +01:00
netfilter	netfilter: conntrack: don't increment invalid counter on NF_REPEAT	2022-02-01 17:25:45 +01:00
netlabel	net: fix NULL pointer reference in cipso_v4_doi_free	2021-09-18 13:40:35 +02:00
netlink	net: netlink: af_netlink: Prevent empty skb by adding a check on len.	2021-12-17 10:14:40 +01:00
netrom	netrom: fix api breakage in nr_setsockopt()	2022-01-27 10:54:03 +01:00
nfc	nfc: llcp: fix NULL error pointer dereference on sendmsg() after failed bind()	2022-01-27 10:53:41 +01:00
nsh
openvswitch	ovs: clear skb->tstamp in forwarding path	2021-08-26 08:35:50 -04:00
packet	net: fix information leakage in /proc/net/ptype	2022-02-01 17:25:43 +01:00
phonet	phonet: refcount leak in pep_sock_accep	2022-01-11 15:25:01 +01:00
psample	net: psample: Fix netlink skb length with tunnel info	2021-03-07 12:34:07 +01:00
qrtr	net: qrtr: fix another OOB Read in qrtr_endpoint_post	2021-09-03 10:09:21 +02:00
rds	rds: memory leak in __rds_conn_create()	2021-12-22 09:30:54 +01:00
rfkill
rose
rxrpc	rxrpc: Adjust retransmission backoff	2022-02-01 17:25:46 +01:00
sched	net: sched: fix use-after-free in tc_new_tfilter()	2022-02-05 12:37:56 +01:00
sctp	sctp: use call_rcu to free endpoint	2022-01-05 12:40:30 +01:00
smc	net/smc: Fix hung_task when removing SMC-R devices	2022-01-27 10:54:32 +01:00
strparser	bpf: sockmap, strparser, and tls are reusing qdisc_skb_cb and colliding	2021-11-18 14:04:27 +01:00
sunrpc	fsnotify: fix fsnotify hooks in pseudo filesystems	2022-02-01 17:25:39 +01:00
switchdev
tipc	tipc: check for null after calling kmemdup	2021-11-26 10:39:19 +01:00
tls	net/tls: Fix authentication failure in CCM mode	2021-12-08 09:03:29 +01:00
unix	af_unix: annote lockless accesses to unix_tot_inflight & gc_in_progress	2022-01-27 10:54:31 +01:00
vmw_vsock	virtio/vsock: fix the transport to work with VMADDR_CID_ANY	2021-12-22 09:30:52 +01:00
wimax
wireless	cfg80211: call cfg80211_stop_ap when switch from P2P_GO type	2021-11-26 10:39:20 +01:00
x25	net/x25: Return the correct errno code	2021-06-18 10:00:06 +02:00
xdp	Revert "xsk: Do not sleep in poll() when need_wakeup set"	2021-12-22 09:30:59 +01:00
xfrm	xfrm: Don't accidentally set RTO_ONLINK in decode_session4()	2022-01-27 10:54:33 +01:00
compat.c	net: Return the correct errno code	2021-06-18 10:00:06 +02:00
devres.c
Kconfig
Makefile
socket.c	ethtool: improve compat ioctl handling	2021-09-18 13:40:21 +02:00
sysctl_net.c