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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 ffff88808ace25ea by task syz-executor.3/4619

CPU: 1 PID: 4619 Comm: syz-executor.3 Not tainted 5.2.0+ #69
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+0xd4/0x306 /mm/kasan/report.c:351
 __kasan_report.cold+0x1b/0x36 /mm/kasan/report.c:482
 kasan_report+0x12/0x17 /mm/kasan/common.c:612
 __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:5151 [inline]
 tcp_check_space+0x191/0x760 /net/ipv4/tcp_input.c:5162
 tcp_data_snd_check /net/ipv4/tcp_input.c:5172 [inline]
 tcp_rcv_established+0x9c1/0x1e70 /net/ipv4/tcp_input.c:5663
 tcp_v6_do_rcv+0x41e/0x12c0 /net/ipv6/tcp_ipv6.c:1356
 sk_backlog_rcv /./include/net/sock.h:945 [inline]
 __release_sock+0x129/0x390 /net/core/sock.c:2418
 release_sock+0x59/0x1c0 /net/core/sock.c:2934
 tls_sk_proto_close+0x282/0x6b0 /net/tls/tls_main.c:313
 inet_release+0xed/0x200 /net/ipv4/af_inet.c:427
 inet6_release+0x53/0x80 /net/ipv6/af_inet6.c:470
 __sock_release+0xce/0x280 /net/socket.c:586
 sock_close+0x1e/0x30 /net/socket.c:1264
 __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:188 [inline]
 exit_to_usermode_loop+0x316/0x380 /arch/x86/entry/common.c:163
 prepare_exit_to_usermode /arch/x86/entry/common.c:194 [inline]
 syscall_return_slowpath /arch/x86/entry/common.c:274 [inline]
 do_syscall_64+0x5a9/0x6a0 /arch/x86/entry/common.c:299
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x413501
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 1b 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007ffc8da91c80 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000413501
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: ffffffffffffffff R09: ffffffffffffffff
R10: 00007ffc8da91d60 R11: 0000000000000293 R12: 000000000075bfc8
R13: 00000000000afe0a R14: 00000000007607f8 R15: ffffffffffffffff

Allocated by task 4625:
 save_stack+0x23/0x90 /mm/kasan/common.c:69
 set_track /mm/kasan/common.c:77 [inline]
 __kasan_kmalloc /mm/kasan/common.c:487 [inline]
 __kasan_kmalloc.constprop.0+0xcf/0xe0 /mm/kasan/common.c:460
 kasan_kmalloc+0x9/0x10 /mm/kasan/common.c:501
 kmem_cache_alloc_trace+0x158/0x790 /mm/slab.c:3550
 kmalloc /./include/linux/slab.h:552 [inline]
 kzalloc /./include/linux/slab.h:748 [inline]
 create_ctx+0x46/0x1f0 /net/tls/tls_main.c:602
 tls_init /net/tls/tls_main.c:788 [inline]
 tls_init+0x11d/0x510 /net/tls/tls_main.c:770
 __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+0x363/0x2480 /net/ipv4/tcp.c:2806
 tcp_setsockopt+0xbe/0xe0 /net/ipv4/tcp.c:3133
 sock_common_setsockopt+0x94/0xd0 /net/core/sock.c:3130
 __sys_setsockopt+0x261/0x4c0 /net/socket.c:2080
 __do_sys_setsockopt /net/socket.c:2096 [inline]
 __se_sys_setsockopt /net/socket.c:2093 [inline]
 __x64_sys_setsockopt+0xbe/0x150 /net/socket.c:2093
 do_syscall_64+0xfd/0x6a0 /arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 4619:
 save_stack+0x23/0x90 /mm/kasan/common.c:69
 set_track /mm/kasan/common.c:77 [inline]
 __kasan_slab_free+0x102/0x150 /mm/kasan/common.c:449
 kasan_slab_free+0xe/0x10 /mm/kasan/common.c:457
 __cache_free /mm/slab.c:3425 [inline]
 kfree+0x10a/0x2c0 /mm/slab.c:3756
 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+0x275/0x6b0 /net/tls/tls_main.c:308
 inet_release+0xed/0x200 /net/ipv4/af_inet.c:427
 inet6_release+0x53/0x80 /net/ipv6/af_inet6.c:470
 __sock_release+0xce/0x280 /net/socket.c:586
 sock_close+0x1e/0x30 /net/socket.c:1264
 __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:188 [inline]
 exit_to_usermode_loop+0x316/0x380 /arch/x86/entry/common.c:163
 prepare_exit_to_usermode /arch/x86/entry/common.c:194 [inline]
 syscall_return_slowpath /arch/x86/entry/common.c:274 [inline]
 do_syscall_64+0x5a9/0x6a0 /arch/x86/entry/common.c:299
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff88808ace2580
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 106 bytes inside of
 512-byte region [ffff88808ace2580, ffff88808ace2780)
The buggy address belongs to the page:
page:ffffea00022b3880 refcount:1 mapcount:0 mapping:ffff8880aa400a80 index:0x0
flags: 0x1fffc0000000200(slab)
raw: 01fffc0000000200 ffffea0002a3e248 ffffea00028fe948 ffff8880aa400a80
raw: 0000000000000000 ffff88808ace2080 0000000100000006 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88808ace2480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88808ace2500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88808ace2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                          ^
 ffff88808ace2600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88808ace2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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