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BUG: KASAN: use-after-free in tls_write_space+0x228/0x290 net/tls/tls_main.c:222
Read of size 1 at addr ffff88808bd40470 by task syz-executor.5/11847

CPU: 1 PID: 11847 Comm: syz-executor.5 Not tainted 4.14.184-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+0x1b2/0x283 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1dc mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report mm/kasan/report.c:409 [inline]
 kasan_report.cold+0xa9/0x2b9 mm/kasan/report.c:393
 tls_write_space+0x228/0x290 net/tls/tls_main.c:222
 tcp_new_space net/ipv4/tcp_input.c:5103 [inline]
 tcp_check_space+0x395/0x640 net/ipv4/tcp_input.c:5114
 tcp_data_snd_check net/ipv4/tcp_input.c:5124 [inline]
 tcp_rcv_established+0x62b/0x15e0 net/ipv4/tcp_input.c:5570
 tcp_v6_do_rcv+0xc7e/0x11b0 net/ipv6/tcp_ipv6.c:1301
 sk_backlog_rcv include/net/sock.h:917 [inline]
 __release_sock+0x12a/0x350 net/core/sock.c:2267
 release_sock+0x54/0x1b0 net/core/sock.c:2782
 tls_sk_proto_close+0x54f/0x7f0 net/tls/tls_main.c:294
 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+0x113/0x190 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: 0033:0x416721
RSP: 002b:00007ffe22267450 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000416721
RDX: 0000000000000000 RSI: ffffffff8640008a RDI: 0000000000000004
RBP: 0000000000000001 R08: ffffffff8120d527 R09: 0000000080682160
R10: 00007ffe22267540 R11: 0000000000000293 R12: 000000000078c900
R13: 000000000078c900 R14: ffffffffffffffff R15: 000000000078bf0c

Allocated by task 11856:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc.part.0+0x4f/0xd0 mm/kasan/kasan.c:551
 kmem_cache_alloc_trace+0x14d/0x3f0 mm/slab.c:3618
 kmalloc include/linux/slab.h:488 [inline]
 kzalloc include/linux/slab.h:661 [inline]
 tls_init+0xb1/0x4e0 net/tls/tls_main.c:518
 tcp_set_ulp+0x18f/0x493 net/ipv4/tcp_ulp.c:127
 do_tcp_setsockopt.isra.0+0x1f6/0x1c70 net/ipv4/tcp.c:2544
 tcp_setsockopt+0xa7/0xc0 net/ipv4/tcp.c:2830
 SYSC_setsockopt net/socket.c:1865 [inline]
 SyS_setsockopt+0x110/0x1e0 net/socket.c:1844
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb

Freed by task 11847:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0xaf/0x190 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3496 [inline]
 kfree+0xcb/0x260 mm/slab.c:3815
 tls_ctx_free net/tls/tls_main.c:252 [inline]
 tls_ctx_free net/tls/tls_main.c:246 [inline]
 tls_sk_proto_close+0x542/0x7f0 net/tls/tls_main.c:290
 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+0x113/0x190 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

The buggy address belongs to the object at ffff88808bd40400
 which belongs to the cache kmalloc-192 of size 192
The buggy address is located 112 bytes inside of
 192-byte region [ffff88808bd40400, ffff88808bd404c0)
The buggy address belongs to the page:
page:ffffea00022f5000 count:1 mapcount:0 mapping:ffff88808bd40000 index:0xffff88808bd40100
flags: 0xfffe0000000100(slab)
raw: 00fffe0000000100 ffff88808bd40000 ffff88808bd40100 0000000100000005
raw: ffffea0002322460 ffffea00021c69e0 ffff8880aa800040 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88808bd40300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88808bd40380: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff88808bd40400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                             ^
 ffff88808bd40480: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff88808bd40500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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