TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
==================================================================
BUG: KASAN: slab-out-of-bounds in sg_mark_end include/linux/scatterlist.h:190 [inline]
BUG: KASAN: slab-out-of-bounds in tls_push_record+0x10cc/0x1270 net/tls/tls_sw.c:255
Read of size 8 at addr ffff8880957b56b8 by task syz-executor.3/11009

CPU: 1 PID: 11009 Comm: syz-executor.3 Not tainted 4.14.262-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351
 kasan_report mm/kasan/report.c:409 [inline]
 __asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430
 sg_mark_end include/linux/scatterlist.h:190 [inline]
 tls_push_record+0x10cc/0x1270 net/tls/tls_sw.c:255
 tls_handle_open_record net/tls/tls_main.c:158 [inline]
 tls_sk_proto_close+0x6f0/0x8b0 net/tls/tls_main.c:270
 inet_release+0xdf/0x1b0 net/ipv4/af_inet.c:425
 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:450
 __sock_release+0xcd/0x2b0 net/socket.c:602
 sock_close+0x15/0x20 net/socket.c:1139
 __fput+0x25f/0x7a0 fs/file_table.c:210
 task_work_run+0x11f/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f09ad779c2b
RSP: 002b:00007fff2e70f910 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007f09ad779c2b
RDX: 0000000000000000 RSI: 0000001b2ed27388 RDI: 0000000000000004
RBP: 00007f09ad8db960 R08: 0000000000000000 R09: 00000000496180d2
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000002b8f3
R13: 00007fff2e70fa10 R14: 00007f09ad8da030 R15: 0000000000000032

Allocated by task 10540:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
 kmem_cache_alloc_trace+0x131/0x3d0 mm/slab.c:3618
 kmalloc include/linux/slab.h:488 [inline]
 kzalloc include/linux/slab.h:661 [inline]
 perf_event_alloc.part.0+0x5b/0x2640 kernel/events/core.c:9554
 perf_event_alloc kernel/events/core.c:10022 [inline]
 SYSC_perf_event_open kernel/events/core.c:10126 [inline]
 SyS_perf_event_open+0x67f/0x24b0 kernel/events/core.c:10012
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb

Freed by task 7:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3496 [inline]
 kfree+0xc9/0x250 mm/slab.c:3815
 __rcu_reclaim kernel/rcu/rcu.h:195 [inline]
 rcu_do_batch kernel/rcu/tree.c:2699 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2962 [inline]
 __rcu_process_callbacks kernel/rcu/tree.c:2929 [inline]
 rcu_process_callbacks+0x780/0x1180 kernel/rcu/tree.c:2946
 __do_softirq+0x24d/0x9ff kernel/softirq.c:288

The buggy address belongs to the object at ffff8880957b4e40
 which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 120 bytes to the right of
 2048-byte region [ffff8880957b4e40, ffff8880957b5640)
The buggy address belongs to the page:
page:ffffea000255ed00 count:1 mapcount:0 mapping:ffff8880957b45c0 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffff8880957b45c0 0000000000000000 0000000100000003
raw: ffffea00025ea520 ffffea000236a820 ffff88813fe74c40 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880957b5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8880957b5600: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff8880957b5680: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
                                        ^
 ffff8880957b5700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880957b5780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
EXT4-fs error (device sda1): mb_free_blocks:1464: group 6, inode 13934: block 212992:freeing already freed block (bit 16384); block bitmap corrupt.
EXT4-fs error (device sda1): ext4_mb_generate_buddy:754: group 6, block bitmap and bg descriptor inconsistent: 32736 vs 32737 free clusters
EXT4-fs (sda1): pa ffff88809e0e2700: logic 0, phys. 212992, len 32
EXT4-fs error (device sda1): ext4_mb_release_inode_pa:3892: group 6, free 16, pa_free 15