Warning: Permanently added '10.128.0.53' (ECDSA) to the list of known hosts.
[   48.365113] random: sshd: uninitialized urandom read (32 bytes read)
executing program
[   48.462071] audit: type=1400 audit(1569025203.847:7): avc:  denied  { map } for  pid=1789 comm="syz-executor253" path="/root/syz-executor253496592" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
[   48.474529] ==================================================================
[   48.495830] BUG: KASAN: use-after-free in tcp_init_tso_segs+0x19d/0x1f0
[   48.502573] Read of size 2 at addr ffff8881cf383430 by task syz-executor253/1789
[   48.510079] 
[   48.511687] CPU: 1 PID: 1789 Comm: syz-executor253 Not tainted 4.14.145+ #0
[   48.518768] Call Trace:
[   48.521338]  dump_stack+0xca/0x134
[   48.524857]  ? tcp_init_tso_segs+0x19d/0x1f0
[   48.529242]  ? tcp_init_tso_segs+0x19d/0x1f0
[   48.533631]  print_address_description+0x60/0x226
[   48.538461]  ? tcp_init_tso_segs+0x19d/0x1f0
[   48.542858]  ? tcp_init_tso_segs+0x19d/0x1f0
[   48.547240]  __kasan_report.cold+0x1a/0x41
[   48.551468]  ? kvm_guest_cpu_init+0x220/0x220
[   48.555939]  ? tcp_init_tso_segs+0x19d/0x1f0
[   48.560325]  tcp_init_tso_segs+0x19d/0x1f0
[   48.564536]  ? tcp_tso_segs+0x7b/0x1c0
[   48.568400]  tcp_write_xmit+0x15a/0x4730
[   48.572439]  ? ip6_mtu+0x206/0x330
[   48.575956]  ? lock_downgrade+0x5d0/0x5d0
[   48.580082]  ? lock_acquire+0x12b/0x360
[   48.584040]  __tcp_push_pending_frames+0xa0/0x230
[   48.588859]  tcp_send_fin+0x154/0xbc0
[   48.592638]  tcp_close+0xc62/0xf40
[   48.596154]  ? lock_acquire+0x12b/0x360
[   48.600106]  ? __sock_release+0x86/0x2c0
[   48.604144]  inet_release+0xe9/0x1c0
[   48.607835]  inet6_release+0x4c/0x70
[   48.611524]  __sock_release+0xd2/0x2c0
[   48.615387]  ? __sock_release+0x2c0/0x2c0
[   48.619512]  sock_close+0x15/0x20
[   48.622943]  __fput+0x25e/0x710
[   48.626216]  task_work_run+0x125/0x1a0
[   48.630101]  do_exit+0x9cb/0x2a20
[   48.633536]  ? mm_update_next_owner+0x610/0x610
[   48.638199]  do_group_exit+0x100/0x2e0
[   48.642075]  SyS_exit_group+0x19/0x20
[   48.645858]  ? do_group_exit+0x2e0/0x2e0
[   48.649901]  do_syscall_64+0x19b/0x520
[   48.653772]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   48.658937] RIP: 0033:0x43ee58
[   48.662109] RSP: 002b:00007ffff76770e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   48.669795] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ee58
[   48.677042] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[   48.684296] RBP: 00000000004be668 R08: 00000000000000e7 R09: ffffffffffffffd0
[   48.691545] R10: 0000000020004008 R11: 0000000000000246 R12: 0000000000000001
[   48.698823] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000
[   48.706080] 
[   48.707685] Allocated by task 1789:
[   48.711306]  __kasan_kmalloc.part.0+0x53/0xc0
[   48.715779]  kmem_cache_alloc+0xee/0x360
[   48.719817]  __alloc_skb+0xea/0x5c0
[   48.723420]  sk_stream_alloc_skb+0xf4/0x8a0
[   48.727724]  tcp_sendmsg_locked+0xf11/0x2f50
[   48.732106]  tcp_sendmsg+0x2b/0x40
[   48.735629]  inet_sendmsg+0x15b/0x520
[   48.739421]  sock_sendmsg+0xb7/0x100
[   48.743123]  SyS_sendto+0x1de/0x2f0
[   48.746725]  do_syscall_64+0x19b/0x520
[   48.750586]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   48.755759]  0xffffffffffffffff
[   48.759009] 
[   48.760611] Freed by task 1789:
[   48.763877]  __kasan_slab_free+0x164/0x210
[   48.768085]  kmem_cache_free+0xd7/0x3b0
[   48.772036]  kfree_skbmem+0x84/0x110
[   48.775737]  tcp_remove_empty_skb+0x264/0x320
[   48.780207]  tcp_sendmsg_locked+0x1c09/0x2f50
[   48.784675]  tcp_sendmsg+0x2b/0x40
[   48.788208]  inet_sendmsg+0x15b/0x520
[   48.791994]  sock_sendmsg+0xb7/0x100
[   48.795686]  SyS_sendto+0x1de/0x2f0
[   48.799298]  do_syscall_64+0x19b/0x520
[   48.803173]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   48.808354]  0xffffffffffffffff
[   48.811620] 
[   48.813232] The buggy address belongs to the object at ffff8881cf383400
[   48.813232]  which belongs to the cache skbuff_fclone_cache of size 456
[   48.826556] The buggy address is located 48 bytes inside of
[   48.826556]  456-byte region [ffff8881cf383400, ffff8881cf3835c8)
[   48.838317] The buggy address belongs to the page:
[   48.843221] page:ffffea00073ce080 count:1 mapcount:0 mapping:          (null) index:0x0 compound_mapcount: 0
[   48.853425] flags: 0x4000000000010200(slab|head)
[   48.858162] raw: 4000000000010200 0000000000000000 0000000000000000 00000001800c000c
[   48.866019] raw: dead000000000100 dead000000000200 ffff8881d6770400 0000000000000000
[   48.873875] page dumped because: kasan: bad access detected
[   48.879555] 
[   48.881157] Memory state around the buggy address:
[   48.886060]  ffff8881cf383300: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
[   48.893393]  ffff8881cf383380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   48.900724] >ffff8881cf383400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   48.908070]                                      ^
[   48.912973]  ffff8881cf383480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   48.920307]  ffff8881cf383500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   48.927638] ==================================================================
[   48.934972] Disabling lock debugging due to kernel taint
[   48.941090] Kernel panic - not syncing: panic_on_warn set ...
[   48.941090] 
[   48.948470] CPU: 1 PID: 1789 Comm: syz-executor253 Tainted: G    B           4.14.145+ #0
[   48.956762] Call Trace:
[   48.959339]  dump_stack+0xca/0x134
[   48.962861]  panic+0x1ea/0x3d3
[   48.966046]  ? add_taint.cold+0x16/0x16
[   48.969998]  ? tcp_init_tso_segs+0x19d/0x1f0
[   48.974472]  ? ___preempt_schedule+0x16/0x18
[   48.978859]  ? tcp_init_tso_segs+0x19d/0x1f0
[   48.983251]  end_report+0x43/0x49
[   48.986695]  ? tcp_init_tso_segs+0x19d/0x1f0
[   48.991078]  __kasan_report.cold+0xd/0x41
[   48.995205]  ? kvm_guest_cpu_init+0x220/0x220
[   48.999674]  ? tcp_init_tso_segs+0x19d/0x1f0
[   49.004058]  tcp_init_tso_segs+0x19d/0x1f0
[   49.008280]  ? tcp_tso_segs+0x7b/0x1c0
[   49.012152]  tcp_write_xmit+0x15a/0x4730
[   49.016190]  ? ip6_mtu+0x206/0x330
[   49.019716]  ? lock_downgrade+0x5d0/0x5d0
[   49.023836]  ? lock_acquire+0x12b/0x360
[   49.027787]  __tcp_push_pending_frames+0xa0/0x230
[   49.032604]  tcp_send_fin+0x154/0xbc0
[   49.036390]  tcp_close+0xc62/0xf40
[   49.039907]  ? lock_acquire+0x12b/0x360
[   49.043865]  ? __sock_release+0x86/0x2c0
[   49.047903]  inet_release+0xe9/0x1c0
[   49.051595]  inet6_release+0x4c/0x70
[   49.055297]  __sock_release+0xd2/0x2c0
[   49.059177]  ? __sock_release+0x2c0/0x2c0
[   49.063299]  sock_close+0x15/0x20
[   49.066738]  __fput+0x25e/0x710
[   49.069997]  task_work_run+0x125/0x1a0
[   49.073867]  do_exit+0x9cb/0x2a20
[   49.077303]  ? mm_update_next_owner+0x610/0x610
[   49.081952]  do_group_exit+0x100/0x2e0
[   49.085981]  SyS_exit_group+0x19/0x20
[   49.089768]  ? do_group_exit+0x2e0/0x2e0
[   49.093807]  do_syscall_64+0x19b/0x520
[   49.097685]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   49.102851] RIP: 0033:0x43ee58
[   49.106018] RSP: 002b:00007ffff76770e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   49.113712] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ee58
[   49.120965] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[   49.128211] RBP: 00000000004be668 R08: 00000000000000e7 R09: ffffffffffffffd0
[   49.135470] R10: 0000000020004008 R11: 0000000000000246 R12: 0000000000000001
[   49.142752] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000
[   49.150800] Kernel Offset: 0x35000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[   49.161702] Rebooting in 86400 seconds..