==================================================================
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 ffff8880926aa138 by task syz-executor.5/10863

CPU: 1 PID: 10863 Comm: syz-executor.5 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: 0033:0x7f6749ad7afb
RSP: 002b:00007ffc3f845b30 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f6749ad7afb
RDX: 0000000000000000 RSI: 0000001b2d827994 RDI: 0000000000000003
RBP: 00007f6749c39960 R08: 0000000000000000 R09: 00000000c99e030c
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000002d092
R13: 00007ffc3f845c30 R14: 00007f6749c38030 R15: 0000000000000032

Allocated by task 10868:
 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]
 tls_set_sw_offload+0x88/0xcd0 net/tls/tls_sw.c:683
 do_tls_setsockopt_tx net/tls/tls_main.c:443 [inline]
 do_tls_setsockopt net/tls/tls_main.c:468 [inline]
 tls_setsockopt+0x216/0x3f0 net/tls/tls_main.c:486
 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 9474:
 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
 skb_free_head net/core/skbuff.c:563 [inline]
 skb_release_data+0x5f6/0x820 net/core/skbuff.c:583
 skb_release_all net/core/skbuff.c:640 [inline]
 __kfree_skb net/core/skbuff.c:654 [inline]
 consume_skb+0xe0/0x380 net/core/skbuff.c:714
 tun_do_read drivers/net/tun.c:1797 [inline]
 tun_do_read drivers/net/tun.c:1771 [inline]
 tun_chr_read_iter+0x16b/0x320 drivers/net/tun.c:1816
 call_read_iter include/linux/fs.h:1774 [inline]
 new_sync_read fs/read_write.c:401 [inline]
 __vfs_read+0x449/0x620 fs/read_write.c:413
 vfs_read+0x139/0x340 fs/read_write.c:447
 SYSC_read fs/read_write.c:574 [inline]
 SyS_read+0xf2/0x210 fs/read_write.c:567
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb

The buggy address belongs to the object at ffff8880926aa140
 which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 8 bytes to the left of
 2048-byte region [ffff8880926aa140, ffff8880926aa940)
The buggy address belongs to the page:
page:ffffea000249aa80 count:1 mapcount:0 mapping:ffff8880926aa140 index:0xffff8880926aa9c0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffff8880926aa140 ffff8880926aa9c0 0000000100000002
raw: ffffea0002492c20 ffffea0002cc65a0 ffff88813fe74c40 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880926aa000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880926aa080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880926aa100: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
                                        ^
 ffff8880926aa180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880926aa200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================