8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device team0 hrtimer: interrupt took 33491 ns ================================================================== BUG: KASAN: use-after-free in ccid_hc_tx_delete+0xe0/0x100 net/dccp/ccid.c:188 Read of size 8 at addr ffff8801abbc3640 by task syz-executor5/6504 CPU: 0 PID: 6504 Comm: syz-executor5 Not tainted 4.19.0-rc1+ #211 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 print_address_description+0x6c/0x20b mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x30d mm/kasan/report.c:412 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 ccid_hc_tx_delete+0xe0/0x100 net/dccp/ccid.c:188 dccp_sk_destruct+0x3c/0x80 net/dccp/proto.c:181 __sk_destruct+0x107/0xa60 net/core/sock.c:1560 __rcu_reclaim kernel/rcu/rcu.h:236 [inline] rcu_do_batch kernel/rcu/tree.c:2576 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2880 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2847 [inline] rcu_process_callbacks+0xf78/0x27c0 kernel/rcu/tree.c:2864 __do_softirq+0x2eb/0xa74 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x1d6/0x210 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x18e/0x6a0 arch/x86/kernel/apic/apic.c:1056 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:864 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:788 [inline] RIP: 0010:slab_alloc mm/slab.c:3385 [inline] RIP: 0010:kmem_cache_alloc+0x270/0x710 mm/slab.c:3552 Code: 4d 85 d2 75 db 65 ff 0d 5e 8a 46 7e e9 ec fe ff ff e8 c4 68 c7 ff 48 83 3d 24 5a 36 06 00 0f 84 35 03 00 00 48 8b 7d d0 57 9d <0f> 1f 44 00 00 e9 7b fe ff ff 31 d2 be a5 01 00 00 48 c7 c7 9d 02 RSP: 0018:ffff8801c4427ac0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 00000000006000c0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000282 RBP: ffff8801c4427b30 R08: ffff8801b5b9e040 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801b3e8d500 R13: ffff8801d954f940 R14: ffff8801d9e6ac00 R15: 00000000006000c0 sock_alloc_inode+0x1d/0x260 net/socket.c:244 alloc_inode+0x63/0x190 fs/inode.c:210 new_inode_pseudo+0x71/0x1a0 fs/inode.c:903 sock_alloc+0x41/0x270 net/socket.c:547 __sock_create+0x175/0x940 net/socket.c:1239 sock_create net/socket.c:1315 [inline] __sys_socket+0x106/0x260 net/socket.c:1345 __do_sys_socket net/socket.c:1354 [inline] __se_sys_socket net/socket.c:1352 [inline] __x64_sys_socket+0x73/0xb0 net/socket.c:1352 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f01336cfc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f01336d06d4 RCX: 0000000000457089 RDX: 0000000000000000 RSI: 0000040000080806 RDI: 000000000000000a RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d5e38 R14: 00000000004c96d7 R15: 0000000000000000 Allocated by task 6468: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490 kmem_cache_alloc+0x12e/0x710 mm/slab.c:3554 ccid_new+0x25b/0x3e0 net/dccp/ccid.c:151 dccp_hdlr_ccid+0x27/0x150 net/dccp/feat.c:44 __dccp_feat_activate+0x184/0x270 net/dccp/feat.c:344 dccp_feat_activate_values+0x3b6/0x839 net/dccp/feat.c:1538 dccp_rcv_request_sent_state_process net/dccp/input.c:472 [inline] dccp_rcv_state_process+0x11dc/0x1a30 net/dccp/input.c:678 dccp_v6_do_rcv+0x26f/0xb80 net/dccp/ipv6.c:638 sk_backlog_rcv include/net/sock.h:931 [inline] __release_sock+0x12f/0x3a0 net/core/sock.c:2336 release_sock+0xad/0x2c0 net/core/sock.c:2849 inet_wait_for_connect net/ipv4/af_inet.c:588 [inline] __inet_stream_connect+0x61f/0x1160 net/ipv4/af_inet.c:680 inet_stream_connect+0x58/0xa0 net/ipv4/af_inet.c:719 __sys_connect+0x37d/0x4c0 net/socket.c:1662 __do_sys_connect net/socket.c:1673 [inline] __se_sys_connect net/socket.c:1670 [inline] __x64_sys_connect+0x73/0xb0 net/socket.c:1670 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 6486: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kmem_cache_free+0x86/0x280 mm/slab.c:3756 ccid_hc_tx_delete+0xc3/0x100 net/dccp/ccid.c:190 dccp_hdlr_ccid+0x7d/0x150 net/dccp/feat.c:53 __dccp_feat_activate+0x184/0x270 net/dccp/feat.c:344 dccp_feat_activate_values+0x3b6/0x839 net/dccp/feat.c:1538 dccp_create_openreq_child+0x47a/0x620 net/dccp/minisocks.c:127 dccp_v6_request_recv_sock+0x253/0x2040 net/dccp/ipv6.c:466 dccp_check_req+0x46e/0x6c0 net/dccp/minisocks.c:196 dccp_v6_rcv+0x88e/0x1d9c net/dccp/ipv6.c:744 ip6_input_finish+0x407/0x1a40 net/ipv6/ip6_input.c:383 NF_HOOK include/linux/netfilter.h:287 [inline] ip6_input+0xe9/0x600 net/ipv6/ip6_input.c:426 dst_input include/net/dst.h:450 [inline] ip6_rcv_finish+0x17a/0x330 net/ipv6/ip6_input.c:76 NF_HOOK include/linux/netfilter.h:287 [inline] ipv6_rcv+0x11e/0x650 net/ipv6/ip6_input.c:271 __netif_receive_skb_one_core+0x14d/0x200 net/core/dev.c:4892 __netif_receive_skb+0x2c/0x1e0 net/core/dev.c:5002 process_backlog+0x219/0x760 net/core/dev.c:5808 napi_poll net/core/dev.c:6228 [inline] net_rx_action+0x799/0x1900 net/core/dev.c:6294 __do_softirq+0x2eb/0xa74 kernel/softirq.c:292 The buggy address belongs to the object at ffff8801abbc3640 which belongs to the cache ccid2_hc_tx_sock of size 1240 The buggy address is located 0 bytes inside of 1240-byte region [ffff8801abbc3640, ffff8801abbc3b18) The buggy address belongs to the page: page:ffffea0006aef080 count:1 mapcount:0 mapping:ffff8801cda01680 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffff8801cd9fb248 ffffea0006d7c708 ffff8801cda01680 raw: 0000000000000000 ffff8801abbc2040 0000000100000005 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801abbc3500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801abbc3580: fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8801abbc3600: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ^ ffff8801abbc3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801abbc3700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================