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BUG: KASAN: use-after-free in tls_write_space+0x14b/0x170 net/tls/tls_main.c:239
Read of size 1 at addr ffff88808345ddaa by task ksoftirqd/1/16

CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.2.0-rc5+ #47
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+0x172/0x1f0 lib/dump_stack.c:113
 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:188
 __kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317
 kasan_report+0x12/0x20 mm/kasan/common.c:614
 __asan_report_load1_noabort+0x14/0x20 mm/kasan/generic_report.c:129
 tls_write_space+0x14b/0x170 net/tls/tls_main.c:239
 tcp_new_space net/ipv4/tcp_input.c:5147 [inline]
 tcp_check_space+0x430/0x720 net/ipv4/tcp_input.c:5158
 tcp_data_snd_check net/ipv4/tcp_input.c:5168 [inline]
 tcp_rcv_state_process+0xe24/0x4de3 net/ipv4/tcp_input.c:6299
 tcp_v6_do_rcv+0x7d7/0x12c0 net/ipv6/tcp_ipv6.c:1376
 tcp_v6_rcv+0x2c76/0x3570 net/ipv6/tcp_ipv6.c:1583
 ip6_protocol_deliver_rcu+0x2fe/0x16c0 net/ipv6/ip6_input.c:397
 ip6_input_finish+0x84/0x170 net/ipv6/ip6_input.c:438
 NF_HOOK include/linux/netfilter.h:305 [inline]
 NF_HOOK include/linux/netfilter.h:299 [inline]
 ip6_input+0xe4/0x3f0 net/ipv6/ip6_input.c:447
 dst_input include/net/dst.h:439 [inline]
 ip6_rcv_finish+0x1de/0x310 net/ipv6/ip6_input.c:76
 NF_HOOK include/linux/netfilter.h:305 [inline]
 NF_HOOK include/linux/netfilter.h:299 [inline]
 ipv6_rcv+0x10e/0x420 net/ipv6/ip6_input.c:272
 __netif_receive_skb_one_core+0x113/0x1a0 net/core/dev.c:5009
 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5123
 process_backlog+0x206/0x750 net/core/dev.c:5934
 napi_poll net/core/dev.c:6357 [inline]
 net_rx_action+0x4f5/0x1070 net/core/dev.c:6423
 __do_softirq+0x25c/0x94c kernel/softirq.c:292
 run_ksoftirqd kernel/softirq.c:603 [inline]
 run_ksoftirqd+0x8e/0x110 kernel/softirq.c:595
 smpboot_thread_fn+0x6a3/0xa30 kernel/smpboot.c:165
 kthread+0x354/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Allocated by task 29339:
 save_stack+0x23/0x90 mm/kasan/common.c:71
 set_track mm/kasan/common.c:79 [inline]
 __kasan_kmalloc mm/kasan/common.c:489 [inline]
 __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:462
 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:503
 kmem_cache_alloc_trace+0x151/0x750 mm/slab.c:3555
 kmalloc include/linux/slab.h:547 [inline]
 kzalloc include/linux/slab.h:742 [inline]
 create_ctx+0x46/0x1f0 net/tls/tls_main.c:601
 tls_init net/tls/tls_main.c:787 [inline]
 tls_init+0x11d/0x510 net/tls/tls_main.c:769
 __tcp_set_ulp net/ipv4/tcp_ulp.c:126 [inline]
 tcp_set_ulp+0x330/0x640 net/ipv4/tcp_ulp.c:147
 do_tcp_setsockopt.isra.0+0x363/0x2430 net/ipv4/tcp.c:2804
 tcp_setsockopt+0xbe/0xe0 net/ipv4/tcp.c:3131
 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3130
 __sys_setsockopt+0x17a/0x280 net/socket.c:2072
 __do_sys_setsockopt net/socket.c:2083 [inline]
 __se_sys_setsockopt net/socket.c:2080 [inline]
 __x64_sys_setsockopt+0xbe/0x150 net/socket.c:2080
 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 29331:
 save_stack+0x23/0x90 mm/kasan/common.c:71
 set_track mm/kasan/common.c:79 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/common.c:451
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:459
 __cache_free mm/slab.c:3432 [inline]
 kfree+0xcf/0x220 mm/slab.c:3755
 tls_ctx_free.part.0+0x3a/0x40 net/tls/tls_main.c:261
 tls_ctx_free net/tls/tls_main.c:256 [inline]
 tls_sk_proto_close+0x3f3/0x750 net/tls/tls_main.c:307
 inet_release+0xe0/0x1f0 net/ipv4/af_inet.c:427
 inet6_release+0x53/0x80 net/ipv6/af_inet6.c:470
 __sock_release+0xce/0x2a0 net/socket.c:601
 sock_close+0x1b/0x30 net/socket.c:1273
 __fput+0x2ff/0x890 fs/file_table.c:280
 ____fput+0x16/0x20 fs/file_table.c:313
 task_work_run+0x145/0x1c0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:185 [inline]
 exit_to_usermode_loop+0x273/0x2c0 arch/x86/entry/common.c:168
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:279 [inline]
 do_syscall_64+0x58e/0x680 arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff88808345dd40
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 106 bytes inside of
 512-byte region [ffff88808345dd40, ffff88808345df40)
The buggy address belongs to the page:
page:ffffea00020d1740 refcount:1 mapcount:0 mapping:ffff8880aa400940 index:0xffff88808345d340
flags: 0x1fffc0000000200(slab)
raw: 01fffc0000000200 ffffea0002933108 ffffea000207a488 ffff8880aa400940
raw: ffff88808345d340 ffff88808345d0c0 0000000100000002 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88808345dc80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff88808345dd00: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
>ffff88808345dd80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff88808345de00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88808345de80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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