netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'.
==================================================================
BUG: KASAN: use-after-free in tls_write_space+0x2b2/0x310 net/tls/tls_main.c:220
Read of size 1 at addr ffff888058e86ba0 by task syz-executor.1/15435

CPU: 1 PID: 15435 Comm: syz-executor.1 Not tainted 4.19.49 #21
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __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:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report mm/kasan/report.c:412 [inline]
 kasan_report.cold+0x8c/0x2ba mm/kasan/report.c:396
 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:430
 tls_write_space+0x2b2/0x310 net/tls/tls_main.c:220
 tcp_new_space net/ipv4/tcp_input.c:5141 [inline]
 tcp_check_space+0x430/0x720 net/ipv4/tcp_input.c:5152
 tcp_data_snd_check net/ipv4/tcp_input.c:5162 [inline]
 tcp_rcv_established+0x9e9/0x1f10 net/ipv4/tcp_input.c:5653
 tcp_v4_do_rcv+0x616/0x8d0 net/ipv4/tcp_ipv4.c:1535
 tcp_v4_rcv+0x2d8e/0x3820 net/ipv4/tcp_ipv4.c:1820
 ip_local_deliver_finish+0x27e/0xc60 net/ipv4/ip_input.c:215
 NF_HOOK include/linux/netfilter.h:289 [inline]
 NF_HOOK include/linux/netfilter.h:283 [inline]
 ip_local_deliver+0x1e9/0x520 net/ipv4/ip_input.c:256
 dst_input include/net/dst.h:450 [inline]
 ip_rcv_finish+0x1d9/0x2f0 net/ipv4/ip_input.c:414
 NF_HOOK include/linux/netfilter.h:289 [inline]
 NF_HOOK include/linux/netfilter.h:283 [inline]
 ip_rcv+0xe8/0x3f0 net/ipv4/ip_input.c:524
 __netif_receive_skb_one_core+0x113/0x1a0 net/core/dev.c:4932
 __netif_receive_skb+0x2c/0x1d0 net/core/dev.c:5044
 process_backlog+0x206/0x750 net/core/dev.c:5855
 napi_poll net/core/dev.c:6278 [inline]
 net_rx_action+0x4f5/0x1070 net/core/dev.c:6344
 __do_softirq+0x25c/0x921 kernel/softirq.c:292
 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1067
 </IRQ>
 do_softirq.part.0+0x11a/0x170 kernel/softirq.c:336
 do_softirq kernel/softirq.c:328 [inline]
 __local_bh_enable_ip+0x211/0x270 kernel/softirq.c:189
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline]
 _raw_spin_unlock_bh+0x31/0x40 kernel/locking/spinlock.c:200
 spin_unlock_bh include/linux/spinlock.h:374 [inline]
 release_sock+0x156/0x1c0 net/core/sock.c:2864
 tls_sk_proto_close+0x691/0xa20 net/tls/tls_main.c:309
 inet_release+0xff/0x1e0 net/ipv4/af_inet.c:428
 __sock_release+0x1f4/0x2a0 net/socket.c:579
 sock_release+0x18/0x20 net/socket.c:599
 smc_release+0x2c1/0x810 net/smc/af_smc.c:156
 __sock_release+0xce/0x2a0 net/socket.c:579
 sock_close+0x1b/0x30 net/socket.c:1140
 __fput+0x2dd/0x8b0 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x145/0x1c0 kernel/task_work.c:113
 get_signal+0x1baa/0x1fc0 kernel/signal.c:2385
 do_signal+0x95/0x1960 arch/x86/kernel/signal.c:821
 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459279
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa421872c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: 0000000000004000 RBX: 0000000000000003 RCX: 0000000000459279
RDX: 000000000000fdef RSI: 00000000200000c0 RDI: 0000000000000005
RBP: 000000000075bfc0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa4218736d4
R13: 00000000004c9164 R14: 00000000004e00f8 R15: 00000000ffffffff

Allocated by task 15435:
 save_stack+0x45/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc mm/kasan/kasan.c:553 [inline]
 kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:531
 kmem_cache_alloc_trace+0x152/0x760 mm/slab.c:3625
 kmalloc include/linux/slab.h:515 [inline]
 kzalloc include/linux/slab.h:709 [inline]
 create_ctx+0x46/0x1f0 net/tls/tls_main.c:550
 tls_init+0x158/0x7a0 net/tls/tls_main.c:683
 tcp_set_ulp+0x216/0x5f0 net/ipv4/tcp_ulp.c:155
 do_tcp_setsockopt.isra.0+0x321/0x2320 net/ipv4/tcp.c:2750
 tcp_setsockopt+0xbe/0xe0 net/ipv4/tcp.c:3064
 sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3044
 smc_setsockopt+0xcb/0x790 net/smc/af_smc.c:1652
 __sys_setsockopt+0x17a/0x280 net/socket.c:1901
 __do_sys_setsockopt net/socket.c:1912 [inline]
 __se_sys_setsockopt net/socket.c:1909 [inline]
 __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1909
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 15435:
 save_stack+0x45/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521
 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
 __cache_free mm/slab.c:3503 [inline]
 kfree+0xcf/0x220 mm/slab.c:3822
 tls_ctx_free.part.0+0x32/0x40 net/tls/tls_main.c:251
 tls_ctx_free net/tls/tls_main.c:246 [inline]
 tls_sk_proto_close+0x684/0xa20 net/tls/tls_main.c:304
 inet_release+0xff/0x1e0 net/ipv4/af_inet.c:428
 __sock_release+0x1f4/0x2a0 net/socket.c:579
 sock_release+0x18/0x20 net/socket.c:599
 smc_release+0x2c1/0x810 net/smc/af_smc.c:156
 __sock_release+0xce/0x2a0 net/socket.c:579
 sock_close+0x1b/0x30 net/socket.c:1140
 __fput+0x2dd/0x8b0 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x145/0x1c0 kernel/task_work.c:113
 get_signal+0x1baa/0x1fc0 kernel/signal.c:2385
 do_signal+0x95/0x1960 arch/x86/kernel/signal.c:821
 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x53d/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff888058e86ac0
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 224 bytes inside of
 512-byte region [ffff888058e86ac0, ffff888058e86cc0)
The buggy address belongs to the page:
page:ffffea000163a180 count:1 mapcount:0 mapping:ffff88812c3f0940 index:0xffff888058e86340
flags: 0x1fffc0000000100(slab)
raw: 01fffc0000000100 ffffea00014a6788 ffffea0002294688 ffff88812c3f0940
raw: ffff888058e86340 ffff888058e860c0 0000000100000002 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888058e86a80: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
 ffff888058e86b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888058e86b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                               ^
 ffff888058e86c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888058e86c80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
==================================================================