Warning: Permanently added '10.128.0.50' (ECDSA) to the list of known hosts.
[   46.910485] random: sshd: uninitialized urandom read (32 bytes read)
[   47.001554] audit: type=1400 audit(1569079048.386:8): avc:  denied  { map } for  pid=1791 comm="syz-executor337" path="/root/syz-executor337932787" dev="sda1" ino=16483 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
[   47.730644] ==================================================================
[   47.738066] BUG: KASAN: use-after-free in tcp_init_tso_segs+0x19d/0x1f0
[   47.744802] Read of size 2 at addr ffff8881da222530 by task syz-executor337/1792
[   47.752330] 
[   47.753937] CPU: 1 PID: 1792 Comm: syz-executor337 Not tainted 4.14.145+ #0
[   47.761011] Call Trace:
[   47.763580]  dump_stack+0xca/0x134
[   47.767101]  ? tcp_init_tso_segs+0x19d/0x1f0
[   47.771487]  ? tcp_init_tso_segs+0x19d/0x1f0
[   47.775875]  print_address_description+0x60/0x226
[   47.780694]  ? tcp_init_tso_segs+0x19d/0x1f0
[   47.785080]  ? tcp_init_tso_segs+0x19d/0x1f0
[   47.789475]  __kasan_report.cold+0x1a/0x41
[   47.793693]  ? kvm_guest_cpu_init+0x220/0x220
[   47.798163]  ? tcp_init_tso_segs+0x19d/0x1f0
[   47.802565]  tcp_init_tso_segs+0x19d/0x1f0
[   47.806798]  ? tcp_tso_segs+0x7b/0x1c0
[   47.810679]  tcp_write_xmit+0x15a/0x4730
[   47.814816]  ? memset+0x20/0x40
[   47.818081]  __tcp_push_pending_frames+0xa0/0x230
[   47.822905]  tcp_send_fin+0x154/0xbc0
[   47.826686]  tcp_close+0xc62/0xf40
[   47.830210]  inet_release+0xe9/0x1c0
[   47.833904]  __sock_release+0xd2/0x2c0
[   47.837769]  ? __sock_release+0x2c0/0x2c0
[   47.841892]  sock_close+0x15/0x20
[   47.845322]  __fput+0x25e/0x710
[   47.848585]  task_work_run+0x125/0x1a0
[   47.852454]  do_exit+0x9cb/0x2a20
[   47.855890]  ? mm_update_next_owner+0x610/0x610
[   47.860563]  do_group_exit+0x100/0x2e0
[   47.864478]  SyS_exit_group+0x19/0x20
[   47.868266]  ? do_group_exit+0x2e0/0x2e0
[   47.872305]  do_syscall_64+0x19b/0x520
[   47.876175]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   47.881355] RIP: 0033:0x440618
[   47.884522] RSP: 002b:00007fffa61a1858 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   47.892207] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000440618
[   47.899451] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001
[   47.906709] RBP: 00000000004c6970 R08: 00000000000000e7 R09: ffffffffffffffd0
[   47.913957] R10: 0000000020000802 R11: 0000000000000246 R12: 0000000000000001
[   47.921204] R13: 00000000006d95e0 R14: 0000000000000000 R15: 0000000000000000
[   47.928475] 
[   47.930083] Allocated by task 1792:
[   47.933690]  __kasan_kmalloc.part.0+0x53/0xc0
[   47.938162]  kmem_cache_alloc+0xee/0x360
[   47.942205]  __alloc_skb+0xea/0x5c0
[   47.945807]  sk_stream_alloc_skb+0xf4/0x8a0
[   47.950102]  tcp_sendmsg_locked+0xf11/0x2f50
[   47.954485]  tcp_sendmsg+0x2b/0x40
[   47.958003]  inet_sendmsg+0x15b/0x520
[   47.961781]  sock_sendmsg+0xb7/0x100
[   47.965473]  SyS_sendto+0x1de/0x2f0
[   47.969075]  do_syscall_64+0x19b/0x520
[   47.972940]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   47.978104]  0xffffffffffffffff
[   47.981371] 
[   47.982988] Freed by task 1792:
[   47.986255]  __kasan_slab_free+0x164/0x210
[   47.990467]  kmem_cache_free+0xd7/0x3b0
[   47.994418]  kfree_skbmem+0x84/0x110
[   47.998107]  tcp_remove_empty_skb+0x264/0x320
[   48.002578]  tcp_sendmsg_locked+0x1c09/0x2f50
[   48.007047]  tcp_sendmsg+0x2b/0x40
[   48.010563]  inet_sendmsg+0x15b/0x520
[   48.014337]  sock_sendmsg+0xb7/0x100
[   48.018038]  SyS_sendto+0x1de/0x2f0
[   48.021640]  do_syscall_64+0x19b/0x520
[   48.025509]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   48.030673]  0xffffffffffffffff
[   48.033924] 
[   48.035532] The buggy address belongs to the object at ffff8881da222500
[   48.035532]  which belongs to the cache skbuff_fclone_cache of size 456
[   48.048870] The buggy address is located 48 bytes inside of
[   48.048870]  456-byte region [ffff8881da222500, ffff8881da2226c8)
[   48.060633] The buggy address belongs to the page:
[   48.065542] page:ffffea0007688880 count:1 mapcount:0 mapping:          (null) index:0x0 compound_mapcount: 0
[   48.075488] flags: 0x4000000000010200(slab|head)
[   48.080222] raw: 4000000000010200 0000000000000000 0000000000000000 00000001800c000c
[   48.088084] raw: dead000000000100 dead000000000200 ffff8881dab70400 0000000000000000
[   48.095938] page dumped because: kasan: bad access detected
[   48.101621] 
[   48.103222] Memory state around the buggy address:
[   48.108127]  ffff8881da222400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
[   48.115462]  ffff8881da222480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[   48.122815] >ffff8881da222500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   48.130148]                                      ^
[   48.135053]  ffff8881da222580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   48.142388]  ffff8881da222600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   48.149719] ==================================================================
[   48.157053] Disabling lock debugging due to kernel taint
[   48.164475] Kernel panic - not syncing: panic_on_warn set ...
[   48.164475] 
[   48.171849] CPU: 1 PID: 1792 Comm: syz-executor337 Tainted: G    B           4.14.145+ #0
[   48.180138] Call Trace:
[   48.182705]  dump_stack+0xca/0x134
[   48.186236]  panic+0x1ea/0x3d3
[   48.189405]  ? add_taint.cold+0x16/0x16
[   48.193367]  ? tcp_init_tso_segs+0x19d/0x1f0
[   48.197753]  ? ___preempt_schedule+0x16/0x18
[   48.202137]  ? tcp_init_tso_segs+0x19d/0x1f0
[   48.206521]  end_report+0x43/0x49
[   48.209963]  ? tcp_init_tso_segs+0x19d/0x1f0
[   48.214356]  __kasan_report.cold+0xd/0x41
[   48.218481]  ? kvm_guest_cpu_init+0x220/0x220
[   48.222949]  ? tcp_init_tso_segs+0x19d/0x1f0
[   48.227334]  tcp_init_tso_segs+0x19d/0x1f0
[   48.231542]  ? tcp_tso_segs+0x7b/0x1c0
[   48.235403]  tcp_write_xmit+0x15a/0x4730
[   48.239442]  ? memset+0x20/0x40
[   48.242703]  __tcp_push_pending_frames+0xa0/0x230
[   48.247523]  tcp_send_fin+0x154/0xbc0
[   48.251300]  tcp_close+0xc62/0xf40
[   48.254831]  inet_release+0xe9/0x1c0
[   48.258536]  __sock_release+0xd2/0x2c0
[   48.262401]  ? __sock_release+0x2c0/0x2c0
[   48.266522]  sock_close+0x15/0x20
[   48.269953]  __fput+0x25e/0x710
[   48.273224]  task_work_run+0x125/0x1a0
[   48.277100]  do_exit+0x9cb/0x2a20
[   48.280531]  ? mm_update_next_owner+0x610/0x610
[   48.285183]  do_group_exit+0x100/0x2e0
[   48.289047]  SyS_exit_group+0x19/0x20
[   48.292838]  ? do_group_exit+0x2e0/0x2e0
[   48.296874]  do_syscall_64+0x19b/0x520
[   48.300740]  entry_SYSCALL_64_after_hwframe+0x42/0xb7
[   48.305917] RIP: 0033:0x440618
[   48.309081] RSP: 002b:00007fffa61a1858 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   48.316765] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000440618
[   48.324009] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001
[   48.331253] RBP: 00000000004c6970 R08: 00000000000000e7 R09: ffffffffffffffd0
[   48.338499] R10: 0000000020000802 R11: 0000000000000246 R12: 0000000000000001
[   48.345758] R13: 00000000006d95e0 R14: 0000000000000000 R15: 0000000000000000
[   48.353673] Kernel Offset: 0x11200000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[   48.364571] Rebooting in 86400 seconds..