Warning: Permanently added '10.128.0.155' (ECDSA) to the list of known hosts.
[   35.387018] random: sshd: uninitialized urandom read (32 bytes read)
[   35.486356] audit: type=1400 audit(1569014643.611:7): avc:  denied  { map } for  pid=1786 comm="syz-executor803" path="/root/syz-executor803020462" 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
[   36.351189] ==================================================================
[   36.358659] BUG: KASAN: use-after-free in tcp_init_tso_segs+0x19d/0x1f0
[   36.365667] Read of size 2 at addr ffff8881cfea4a30 by task syz-executor803/1787
[   36.373808] 
[   36.375445] CPU: 0 PID: 1787 Comm: syz-executor803 Not tainted 4.14.145+ #0
[   36.383084] Call Trace:
[   36.385788]  dump_stack+0xca/0x134
[   36.389312]  ? tcp_init_tso_segs+0x19d/0x1f0
[   36.393790]  ? tcp_init_tso_segs+0x19d/0x1f0
[   36.398195]  print_address_description+0x60/0x226
[   36.403026]  ? tcp_init_tso_segs+0x19d/0x1f0
[   36.407592]  ? tcp_init_tso_segs+0x19d/0x1f0
[   36.412028]  __kasan_report.cold+0x1a/0x41
[   36.416385]  ? kvm_guest_cpu_init+0x220/0x220
[   36.421055]  ? tcp_init_tso_segs+0x19d/0x1f0
[   36.425454]  tcp_init_tso_segs+0x19d/0x1f0
[   36.429681]  ? tcp_tso_segs+0x7b/0x1c0
[   36.433652]  tcp_write_xmit+0x15a/0x4730
[   36.437754]  ? memset+0x20/0x40
[   36.441044]  __tcp_push_pending_frames+0xa0/0x230
[   36.445901]  tcp_send_fin+0x154/0xbc0
[   36.449706]  tcp_close+0xc62/0xf40
[   36.453259]  inet_release+0xe9/0x1c0
[   36.456978]  __sock_release+0xd2/0x2c0
[   36.461036]  ? __sock_release+0x2c0/0x2c0
[   36.465187]  sock_close+0x15/0x20
[   36.468626]  __fput+0x25e/0x710
[   36.471929]  task_work_run+0x125/0x1a0
[   36.475923]  do_exit+0x9cb/0x2a20
[   36.479377]  ? mm_update_next_owner+0x610/0x610
[   36.484064]  do_group_exit+0x100/0x2e0
[   36.487971]  SyS_exit_group+0x19/0x20
[   36.491770]  ? do_group_exit+0x2e0/0x2e0
[   36.495817]  do_syscall_64+0x19b/0x520
[   36.499695]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   36.504952] RIP: 0033:0x440b48
[   36.508123] RSP: 002b:00007ffcab5a28a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   36.516039] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000440b48
[   36.523572] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001
[   36.530846] RBP: 00000000004c6fd0 R08: 00000000000000e7 R09: ffffffffffffffd0
[   36.538106] R10: 0000000020000800 R11: 0000000000000246 R12: 0000000000000001
[   36.545522] R13: 00000000006d95e0 R14: 0000000000000000 R15: 0000000000000000
[   36.553493] 
[   36.555138] Allocated by task 1787:
[   36.558772]  __kasan_kmalloc.part.0+0x53/0xc0
[   36.563266]  kmem_cache_alloc+0xee/0x360
[   36.567310]  __alloc_skb+0xea/0x5c0
[   36.572138]  sk_stream_alloc_skb+0xf4/0x8a0
[   36.576454]  tcp_sendmsg_locked+0xf11/0x2f50
[   36.580991]  tcp_sendmsg+0x2b/0x40
[   36.584522]  inet_sendmsg+0x15b/0x520
[   36.588314]  sock_sendmsg+0xb7/0x100
[   36.592009]  SyS_sendto+0x1de/0x2f0
[   36.595618]  do_syscall_64+0x19b/0x520
[   36.599491]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   36.604661]  0xffffffffffffffff
[   36.607916] 
[   36.609538] Freed by task 1787:
[   36.612845]  __kasan_slab_free+0x164/0x210
[   36.617074]  kmem_cache_free+0xd7/0x3b0
[   36.621124]  kfree_skbmem+0x84/0x110
[   36.624832]  tcp_remove_empty_skb+0x264/0x320
[   36.629370]  tcp_sendmsg_locked+0x1c09/0x2f50
[   36.633893]  tcp_sendmsg+0x2b/0x40
[   36.637421]  inet_sendmsg+0x15b/0x520
[   36.641200]  sock_sendmsg+0xb7/0x100
[   36.644895]  SyS_sendto+0x1de/0x2f0
[   36.648513]  do_syscall_64+0x19b/0x520
[   36.652394]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   36.657564]  0xffffffffffffffff
[   36.660823] 
[   36.662431] The buggy address belongs to the object at ffff8881cfea4a00
[   36.662431]  which belongs to the cache skbuff_fclone_cache of size 456
[   36.676056] The buggy address is located 48 bytes inside of
[   36.676056]  456-byte region [ffff8881cfea4a00, ffff8881cfea4bc8)
[   36.688420] The buggy address belongs to the page:
[   36.693532] page:ffffea00073fa900 count:1 mapcount:0 mapping:          (null) index:0x0 compound_mapcount: 0
[   36.703498] flags: 0x4000000000010200(slab|head)
[   36.708336] raw: 4000000000010200 0000000000000000 0000000000000000 00000001800c000c
[   36.716216] raw: dead000000000100 dead000000000200 ffff8881dab70400 0000000000000000
[   36.724344] page dumped because: kasan: bad access detected
[   36.730035] 
[   36.731640] Memory state around the buggy address:
[   36.736550]  ffff8881cfea4900: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
[   36.743892]  ffff8881cfea4980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   36.752362] >ffff8881cfea4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   36.759718]                                      ^
[   36.764649]  ffff8881cfea4a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   36.772012]  ffff8881cfea4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   36.779713] ==================================================================
[   36.787085] Disabling lock debugging due to kernel taint
[   36.792698] Kernel panic - not syncing: panic_on_warn set ...
[   36.792698] 
[   36.800080] CPU: 0 PID: 1787 Comm: syz-executor803 Tainted: G    B           4.14.145+ #0
[   36.808386] Call Trace:
[   36.810968]  dump_stack+0xca/0x134
[   36.814542]  panic+0x1ea/0x3d3
[   36.818034]  ? add_taint.cold+0x16/0x16
[   36.822489]  ? tcp_init_tso_segs+0x19d/0x1f0
[   36.827576]  ? ___preempt_schedule+0x16/0x18
[   36.832056]  ? tcp_init_tso_segs+0x19d/0x1f0
[   36.836575]  end_report+0x43/0x49
[   36.840167]  ? tcp_init_tso_segs+0x19d/0x1f0
[   36.844717]  __kasan_report.cold+0xd/0x41
[   36.848930]  ? kvm_guest_cpu_init+0x220/0x220
[   36.853437]  ? tcp_init_tso_segs+0x19d/0x1f0
[   36.857854]  tcp_init_tso_segs+0x19d/0x1f0
[   36.862983]  ? tcp_tso_segs+0x7b/0x1c0
[   36.867003]  tcp_write_xmit+0x15a/0x4730
[   36.871436]  ? memset+0x20/0x40
[   36.874708]  __tcp_push_pending_frames+0xa0/0x230
[   36.880051]  tcp_send_fin+0x154/0xbc0
[   36.884043]  tcp_close+0xc62/0xf40
[   36.888124]  inet_release+0xe9/0x1c0
[   36.892341]  __sock_release+0xd2/0x2c0
[   36.896582]  ? __sock_release+0x2c0/0x2c0
[   36.900783]  sock_close+0x15/0x20
[   36.904249]  __fput+0x25e/0x710
[   36.907742]  task_work_run+0x125/0x1a0
[   36.911630]  do_exit+0x9cb/0x2a20
[   36.915202]  ? mm_update_next_owner+0x610/0x610
[   36.919876]  do_group_exit+0x100/0x2e0
[   36.923757]  SyS_exit_group+0x19/0x20
[   36.927667]  ? do_group_exit+0x2e0/0x2e0
[   36.931876]  do_syscall_64+0x19b/0x520
[   36.935994]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   36.941256] RIP: 0033:0x440b48
[   36.944449] RSP: 002b:00007ffcab5a28a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   36.952328] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000440b48
[   36.959601] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001
[   36.966983] RBP: 00000000004c6fd0 R08: 00000000000000e7 R09: ffffffffffffffd0
[   36.974514] R10: 0000000020000800 R11: 0000000000000246 R12: 0000000000000001
[   36.982721] R13: 00000000006d95e0 R14: 0000000000000000 R15: 0000000000000000
[   36.991285] Kernel Offset: 0x1f600000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[   37.002320] Rebooting in 86400 seconds..