IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 8021q: adding VLAN 0 to HW filter on device team0 hrtimer: interrupt took 27554 ns ================================================================== BUG: KASAN: use-after-free in ccid_hc_tx_delete+0xe0/0x100 net/dccp/ccid.c:188 Read of size 8 at addr ffff8801aaaf7700 by task syz-executor0/4491 CPU: 1 PID: 4491 Comm: syz-executor0 Not tainted 4.19.0-rc1+ #115 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:__sanitizer_cov_trace_pc+0x0/0x50 kernel/kcov.c:146 Code: 14 dd 28 00 00 00 4d 39 d0 72 1b 49 83 c1 01 4a 89 7c 10 e0 4a 89 74 10 e8 4a 89 54 10 f0 4a 89 4c d8 20 4c 89 08 5d c3 66 90 <55> 65 48 8b 04 25 40 ee 01 00 65 8b 15 3f 2d 85 7e 48 89 e5 81 e2 RSP: 0018:ffff8801d90cf190 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff8801a8a836f0 RCX: ffffffff820f4dfc RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff8801d90cf3a0 R08: ffff8801acb18300 R09: ffffed0035150754 R10: ffffed0035150754 R11: ffff8801a8a83aa3 R12: 0000000000000000 R13: 00000000000000a0 R14: ffff8801ccfbe780 R15: 0000000000000000 ext4_orphan_del+0x8d3/0xee0 fs/ext4/namei.c:2896 ext4_evict_inode+0xa0e/0x19b0 fs/ext4/inode.c:319 evict+0x4ae/0x990 fs/inode.c:558 iput_final fs/inode.c:1547 [inline] iput+0x5fa/0xa00 fs/inode.c:1573 dentry_unlink_inode+0x461/0x5e0 fs/dcache.c:374 d_delete+0x1d7/0x220 fs/dcache.c:2370 vfs_rmdir+0x38b/0x470 fs/namei.c:3893 do_rmdir+0x537/0x630 fs/namei.c:3941 __do_sys_rmdir fs/namei.c:3959 [inline] __se_sys_rmdir fs/namei.c:3957 [inline] __ia32_sys_rmdir+0x35/0x40 fs/namei.c:3957 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7f6eca9 Code: 55 08 8b 88 64 cd ff ff 8b 98 68 cd ff ff 89 c8 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 1c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000ffec0afc EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00000000ffec1be0 RCX: 000000000812368c RDX: 00000000ffec1be0 RSI: 0000000000000065 RDI: 00000000080d7747 RBP: 00000000ffec0b8c R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 4774: 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_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 Freed by task 4775: 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 ffff8801aaaf7700 which belongs to the cache ccid2_hc_tx_sock of size 1240 The buggy address is located 0 bytes inside of 1240-byte region [ffff8801aaaf7700, ffff8801aaaf7bd8) The buggy address belongs to the page: page:ffffea0006aabd80 count:1 mapcount:0 mapping:ffff8801cd855080 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffffea00075c7c08 ffff8801cd856448 ffff8801cd855080 raw: 0000000000000000 ffff8801aaaf6100 0000000100000005 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801aaaf7600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801aaaf7680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8801aaaf7700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801aaaf7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801aaaf7800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================