Warning: Permanently added '10.128.1.20' (ECDSA) to the list of known hosts.
[   46.526865] random: sshd: uninitialized urandom read (32 bytes read)
[   46.634015] audit: type=1400 audit(1569022540.938:7): avc:  denied  { map } for  pid=1793 comm="syz-executor794" path="/root/syz-executor794635907" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
executing program
[   47.421281] ==================================================================
[   47.428759] BUG: KASAN: use-after-free in tcp_init_tso_segs+0x19d/0x1f0
[   47.435499] Read of size 2 at addr ffff8881cf1022b0 by task syz-executor794/1794
[   47.443096] 
[   47.444725] CPU: 1 PID: 1794 Comm: syz-executor794 Not tainted 4.14.145+ #0
[   47.451799] Call Trace:
[   47.454383]  dump_stack+0xca/0x134
[   47.457919]  ? tcp_init_tso_segs+0x19d/0x1f0
[   47.462318]  ? tcp_init_tso_segs+0x19d/0x1f0
[   47.466726]  print_address_description+0x60/0x226
[   47.471553]  ? tcp_init_tso_segs+0x19d/0x1f0
[   47.475956]  ? tcp_init_tso_segs+0x19d/0x1f0
[   47.480353]  __kasan_report.cold+0x1a/0x41
[   47.484583]  ? kvm_guest_cpu_init+0x220/0x220
[   47.489055]  ? tcp_init_tso_segs+0x19d/0x1f0
[   47.493489]  tcp_init_tso_segs+0x19d/0x1f0
[   47.497723]  ? tcp_tso_segs+0x7b/0x1c0
[   47.501600]  tcp_write_xmit+0x15a/0x4730
[   47.505646]  ? memset+0x20/0x40
[   47.508914]  __tcp_push_pending_frames+0xa0/0x230
[   47.513792]  tcp_send_fin+0x154/0xbc0
[   47.517632]  tcp_close+0xc62/0xf40
[   47.521330]  inet_release+0xe9/0x1c0
[   47.525030]  __sock_release+0xd2/0x2c0
[   47.528957]  ? __sock_release+0x2c0/0x2c0
[   47.533087]  sock_close+0x15/0x20
[   47.536532]  __fput+0x25e/0x710
[   47.539824]  task_work_run+0x125/0x1a0
[   47.543702]  do_exit+0x9cb/0x2a20
[   47.547144]  ? mm_update_next_owner+0x610/0x610
[   47.551804]  do_group_exit+0x100/0x2e0
[   47.555685]  SyS_exit_group+0x19/0x20
[   47.559476]  ? do_group_exit+0x2e0/0x2e0
[   47.563524]  do_syscall_64+0x19b/0x520
[   47.567404]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   47.572584] RIP: 0033:0x440618
[   47.575814] RSP: 002b:00007fff861f7b98 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   47.583652] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000440618
[   47.590912] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001
[   47.598175] RBP: 00000000004c6970 R08: 00000000000000e7 R09: ffffffffffffffd0
[   47.605438] R10: 0000000020000802 R11: 0000000000000246 R12: 0000000000000001
[   47.612698] R13: 00000000006d95e0 R14: 0000000000000000 R15: 0000000000000000
[   47.619978] 
[   47.621588] Allocated by task 1794:
[   47.625299]  __kasan_kmalloc.part.0+0x53/0xc0
[   47.629775]  kmem_cache_alloc+0xee/0x360
[   47.634292]  __alloc_skb+0xea/0x5c0
[   47.637900]  sk_stream_alloc_skb+0xf4/0x8a0
[   47.642213]  tcp_sendmsg_locked+0xf11/0x2f50
[   47.646612]  tcp_sendmsg+0x2b/0x40
[   47.650147]  inet_sendmsg+0x15b/0x520
[   47.653943]  sock_sendmsg+0xb7/0x100
[   47.657654]  SyS_sendto+0x1de/0x2f0
[   47.661260]  do_syscall_64+0x19b/0x520
[   47.665127]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   47.670305]  0xffffffffffffffff
[   47.673564] 
[   47.675269] Freed by task 1794:
[   47.678552]  __kasan_slab_free+0x164/0x210
[   47.682860]  kmem_cache_free+0xd7/0x3b0
[   47.686815]  kfree_skbmem+0x84/0x110
[   47.690688]  tcp_remove_empty_skb+0x264/0x320
[   47.695171]  tcp_sendmsg_locked+0x1c09/0x2f50
[   47.699655]  tcp_sendmsg+0x2b/0x40
[   47.703176]  inet_sendmsg+0x15b/0x520
[   47.707042]  sock_sendmsg+0xb7/0x100
[   47.710734]  SyS_sendto+0x1de/0x2f0
[   47.714351]  do_syscall_64+0x19b/0x520
[   47.718238]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   47.723424]  0xffffffffffffffff
[   47.726685] 
[   47.728354] The buggy address belongs to the object at ffff8881cf102280
[   47.728354]  which belongs to the cache skbuff_fclone_cache of size 456
[   47.741879] The buggy address is located 48 bytes inside of
[   47.741879]  456-byte region [ffff8881cf102280, ffff8881cf102448)
[   47.753658] The buggy address belongs to the page:
[   47.758639] page:ffffea00073c4080 count:1 mapcount:0 mapping:          (null) index:0x0 compound_mapcount: 0
[   47.768594] flags: 0x4000000000010200(slab|head)
[   47.773509] raw: 4000000000010200 0000000000000000 0000000000000000 00000001800c000c
[   47.782121] raw: dead000000000100 dead000000000200 ffff8881dab70400 0000000000000000
[   47.790111] page dumped because: kasan: bad access detected
[   47.795994] 
[   47.797616] Memory state around the buggy address:
[   47.802661]  ffff8881cf102180: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
[   47.810141]  ffff8881cf102200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   47.817548] >ffff8881cf102280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   47.824922]                                      ^
[   47.829848]  ffff8881cf102300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   47.837203]  ffff8881cf102380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   47.844551] ==================================================================
[   47.851888] Disabling lock debugging due to kernel taint
[   47.859261] Kernel panic - not syncing: panic_on_warn set ...
[   47.859261] 
[   47.866655] CPU: 1 PID: 1794 Comm: syz-executor794 Tainted: G    B           4.14.145+ #0
[   47.875152] Call Trace:
[   47.877814]  dump_stack+0xca/0x134
[   47.881341]  panic+0x1ea/0x3d3
[   47.884523]  ? add_taint.cold+0x16/0x16
[   47.888476]  ? tcp_init_tso_segs+0x19d/0x1f0
[   47.892873]  ? ___preempt_schedule+0x16/0x18
[   47.897257]  ? tcp_init_tso_segs+0x19d/0x1f0
[   47.901734]  end_report+0x43/0x49
[   47.905169]  ? tcp_init_tso_segs+0x19d/0x1f0
[   47.909641]  __kasan_report.cold+0xd/0x41
[   47.913768]  ? kvm_guest_cpu_init+0x220/0x220
[   47.918244]  ? tcp_init_tso_segs+0x19d/0x1f0
[   47.922646]  tcp_init_tso_segs+0x19d/0x1f0
[   47.926857]  ? tcp_tso_segs+0x7b/0x1c0
[   47.930738]  tcp_write_xmit+0x15a/0x4730
[   47.934781]  ? memset+0x20/0x40
[   47.938063]  __tcp_push_pending_frames+0xa0/0x230
[   47.942899]  tcp_send_fin+0x154/0xbc0
[   47.946682]  tcp_close+0xc62/0xf40
[   47.950219]  inet_release+0xe9/0x1c0
[   47.953917]  __sock_release+0xd2/0x2c0
[   47.957781]  ? __sock_release+0x2c0/0x2c0
[   47.961906]  sock_close+0x15/0x20
[   47.965361]  __fput+0x25e/0x710
[   47.968620]  task_work_run+0x125/0x1a0
[   47.972493]  do_exit+0x9cb/0x2a20
[   47.975927]  ? mm_update_next_owner+0x610/0x610
[   47.980580]  do_group_exit+0x100/0x2e0
[   47.984540]  SyS_exit_group+0x19/0x20
[   47.988339]  ? do_group_exit+0x2e0/0x2e0
[   47.992379]  do_syscall_64+0x19b/0x520
[   47.996247]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   48.001430] RIP: 0033:0x440618
[   48.004599] RSP: 002b:00007fff861f7b98 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   48.012545] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000440618
[   48.019892] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001
[   48.027151] RBP: 00000000004c6970 R08: 00000000000000e7 R09: ffffffffffffffd0
[   48.034415] R10: 0000000020000802 R11: 0000000000000246 R12: 0000000000000001
[   48.041801] R13: 00000000006d95e0 R14: 0000000000000000 R15: 0000000000000000
[   48.049923] Kernel Offset: 0xbc00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[   48.060758] Rebooting in 86400 seconds..