Warning: Permanently added '10.128.10.39' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   39.161624] 
[   39.163387] ======================================================
[   39.169681] [ INFO: possible circular locking dependency detected ]
[   39.176063] 4.4.162+ #117 Not tainted
[   39.179836] -------------------------------------------------------
[   39.186216] syz-executor023/2087 is trying to acquire lock:
[   39.191902]  (sel_mutex){+.+.+.}, at: [<ffffffff81963767>] sel_commit_bools_write+0x87/0x250
[   39.200949] 
[   39.200949] but task is already holding lock:
[   39.206894]  (&pipe->mutex/1){+.+.+.}, at: [<ffffffff814a9afe>] pipe_lock+0x5e/0x70
[   39.215302] 
[   39.215302] which lock already depends on the new lock.
[   39.215302] 
[   39.223594] 
[   39.223594] the existing dependency chain (in reverse order) is:
[   39.231263] 
-> #7 (&pipe->mutex/1){+.+.+.}:
[   39.236454]        [<ffffffff81202cde>] lock_acquire+0x15e/0x450
[   39.242775]        [<ffffffff826fad9b>] mutex_lock_nested+0xbb/0x8d0
[   39.249423]        [<ffffffff814aca0c>] fifo_open+0x15c/0x9e0
[   39.255407]        [<ffffffff8148ba0d>] do_dentry_open+0x38d/0xbd0
[   39.261900]        [<ffffffff8148f17a>] vfs_open+0x12a/0x210
[   39.267808]        [<ffffffff814bed5c>] path_openat+0x50c/0x39a0
[   39.274052]        [<ffffffff814c5e87>] do_filp_open+0x197/0x270
[   39.280316]        [<ffffffff814a1eef>] do_open_execat+0x10f/0x6f0
[   39.286739]        [<ffffffff814a74a1>] do_execveat_common.isra.14+0x6a1/0x1f00
[   39.294290]        [<ffffffff814a9672>] SyS_execve+0x42/0x50
[   39.300206]        [<ffffffff827065f5>] return_from_execve+0x0/0x23
[   39.306720] 
-> #6 (&sig->cred_guard_mutex){+.+.+.}:
[   39.312387]        [<ffffffff81202cde>] lock_acquire+0x15e/0x450
[   39.318763]        [<ffffffff826fbf4c>] mutex_lock_killable_nested+0xcc/0xa10
[   39.326140]        [<ffffffff815e2b54>] lock_trace+0x44/0xc0
[   39.332050]        [<ffffffff815e33a9>] proc_pid_syscall+0xa9/0x260
[   39.338616]        [<ffffffff815daffd>] proc_single_show+0xfd/0x170
[   39.345114]        [<ffffffff81501656>] seq_read+0x4b6/0x12b0
[   39.351095]        [<ffffffff8149084c>] __vfs_read+0x11c/0x3d0
[   39.357162]        [<ffffffff81492520>] vfs_read+0x130/0x360
[   39.363056]        [<ffffffff81494d49>] SyS_read+0xd9/0x1c0
[   39.368863]        [<ffffffff827062e1>] entry_SYSCALL_64_fastpath+0x1e/0x9a
[   39.376067] 
-> #5 (&p->lock){+.+.+.}:
[   39.380490]        [<ffffffff81202cde>] lock_acquire+0x15e/0x450
[   39.386736]        [<ffffffff826fad9b>] mutex_lock_nested+0xbb/0x8d0
[   39.393330]        [<ffffffff8150127d>] seq_read+0xdd/0x12b0
[   39.399279]        [<ffffffff81491378>] do_loop_readv_writev+0x148/0x1e0
[   39.406215]        [<ffffffff814931b1>] do_readv_writev+0x581/0x6f0
[   39.412715]        [<ffffffff81493398>] vfs_readv+0x78/0xb0
[   39.418526]        [<ffffffff8152f53f>] default_file_splice_read+0x50f/0x8f0
[   39.425816]        [<ffffffff8152b417>] do_splice_to+0xf7/0x140
[   39.431974]        [<ffffffff8152b6a2>] splice_direct_to_actor+0x242/0x830
[   39.439183]        [<ffffffff8152be33>] do_splice_direct+0x1a3/0x270
[   39.445781]        [<ffffffff814945d4>] do_sendfile+0x4e4/0xb80
[   39.452010]        [<ffffffff814965c3>] SyS_sendfile64+0xc3/0x150
[   39.458343]        [<ffffffff827062e1>] entry_SYSCALL_64_fastpath+0x1e/0x9a
[   39.465558] 
-> #4 (sb_writers#4){.+.+.+}:
[   39.470506]        [<ffffffff81202cde>] lock_acquire+0x15e/0x450
[   39.476747]        [<ffffffff81498cae>] __sb_start_write+0x1ae/0x310
[   39.483340]        [<ffffffff816bafc7>] ext4_lazyinit_thread+0x1a7/0x750
[   39.490276]        [<ffffffff81133e18>] kthread+0x268/0x300
[   39.496083]        [<ffffffff827066c5>] ret_from_fork+0x55/0x80
[   39.502238] 
-> #3 (&eli->li_list_mtx){+.+...}:
[   39.507449]        [<ffffffff81202cde>] lock_acquire+0x15e/0x450
[   39.513790]        [<ffffffff826fad9b>] mutex_lock_nested+0xbb/0x8d0
[   39.520381]        [<ffffffff816c50c4>] ext4_register_li_request+0x304/0x7a0
[   39.527782]        [<ffffffff816c68c8>] ext4_remount+0x1368/0x1bb0
[   39.534198]        [<ffffffff8149bf58>] do_remount_sb2+0x428/0x7d0
[   39.540668]        [<ffffffff814fbe9e>] do_mount+0x101e/0x2a10
[   39.546804]        [<ffffffff814fe3e1>] SyS_mount+0x191/0x1c0
[   39.552778]        [<ffffffff827062e1>] entry_SYSCALL_64_fastpath+0x1e/0x9a
[   39.559978] 
-> #2 (&ext4_li_mtx){+.+.+.}:
[   39.564745]        [<ffffffff81202cde>] lock_acquire+0x15e/0x450
[   39.570983]        [<ffffffff826fad9b>] mutex_lock_nested+0xbb/0x8d0
[   39.577575]        [<ffffffff816c4e47>] ext4_register_li_request+0x87/0x7a0
[   39.584766]        [<ffffffff816c68c8>] ext4_remount+0x1368/0x1bb0
[   39.591229]        [<ffffffff8149bf58>] do_remount_sb2+0x428/0x7d0
[   39.597659]        [<ffffffff814fbe9e>] do_mount+0x101e/0x2a10
[   39.603730]        [<ffffffff814fe3e1>] SyS_mount+0x191/0x1c0
[   39.609718]        [<ffffffff827062e1>] entry_SYSCALL_64_fastpath+0x1e/0x9a
[   39.616920] 
-> #1 (&type->s_umount_key#34){++++++}:
[   39.622684]        [<ffffffff81202cde>] lock_acquire+0x15e/0x450
[   39.628961]        [<ffffffff82701312>] down_read+0x42/0x60
[   39.634775]        [<ffffffff8149b671>] iterate_supers+0xe1/0x260
[   39.641149]        [<ffffffff8199e104>] selinux_complete_init+0x2f/0x31
[   39.647997]        [<ffffffff8198fd56>] security_load_policy+0x886/0x9b0
[   39.654932]        [<ffffffff81965c81>] sel_write_load+0x191/0xfc0
[   39.661406]        [<ffffffff81490c1c>] __vfs_write+0x11c/0x3e0
[   39.667566]        [<ffffffff814928ce>] vfs_write+0x17e/0x4e0
[   39.673545]        [<ffffffff81494f09>] SyS_write+0xd9/0x1c0
[   39.679430]        [<ffffffff827062e1>] entry_SYSCALL_64_fastpath+0x1e/0x9a
[   39.686628] 
-> #0 (sel_mutex){+.+.+.}:
[   39.691140]        [<ffffffff811ff0fc>] __lock_acquire+0x3e6c/0x5f10
[   39.697725]        [<ffffffff81202cde>] lock_acquire+0x15e/0x450
[   39.703964]        [<ffffffff826fad9b>] mutex_lock_nested+0xbb/0x8d0
[   39.710550]        [<ffffffff81963767>] sel_commit_bools_write+0x87/0x250
[   39.717565]        [<ffffffff81490c1c>] __vfs_write+0x11c/0x3e0
[   39.723717]        [<ffffffff81490fea>] __kernel_write+0x10a/0x350
[   39.730155]        [<ffffffff8152c05d>] write_pipe_buf+0x15d/0x1f0
[   39.736573]        [<ffffffff8152cef4>] __splice_from_pipe+0x364/0x790
[   39.743338]        [<ffffffff8152ffb9>] splice_from_pipe+0xf9/0x170
[   39.749909]        [<ffffffff815300bc>] default_file_splice_write+0x3c/0x80
[   39.757111]        [<ffffffff81531181>] SyS_splice+0xde1/0x1430
[   39.763259]        [<ffffffff827062e1>] entry_SYSCALL_64_fastpath+0x1e/0x9a
[   39.770462] 
[   39.770462] other info that might help us debug this:
[   39.770462] 
[   39.778580] Chain exists of:
  sel_mutex --> &sig->cred_guard_mutex --> &pipe->mutex/1

[   39.787706]  Possible unsafe locking scenario:
[   39.787706] 
[   39.793839]        CPU0                    CPU1
[   39.798477]        ----                    ----
[   39.803112]   lock(&pipe->mutex/1);
[   39.807064]                                lock(&sig->cred_guard_mutex);
[   39.814106]                                lock(&pipe->mutex/1);
[   39.820571]   lock(sel_mutex);
[   39.823969] 
[   39.823969]  *** DEADLOCK ***
[   39.823969] 
[   39.830001] 2 locks held by syz-executor023/2087:
[   39.834812]  #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff8153134a>] SyS_splice+0xfaa/0x1430
[   39.844077]  #1:  (&pipe->mutex/1){+.+.+.}, at: [<ffffffff814a9afe>] pipe_lock+0x5e/0x70
[   39.853044] 
[   39.853044] stack backtrace:
[   39.857515] CPU: 0 PID: 2087 Comm: syz-executor023 Not tainted 4.4.162+ #117
[   39.864671]  0000000000000000 3f5b8160f0f4f9e9 ffff8801d3f4f5f8 ffffffff81a994bd
[   39.872654]  ffffffff83aae4c0 ffffffff83ab50c0 ffffffff83ab0680 ffff8801d5d4e810
[   39.880730]  ffff8801d5d4df00 ffff8801d3f4f640 ffffffff813a834a 0000000000000002
[   39.888800] Call Trace:
[   39.891366]  [<ffffffff81a994bd>] dump_stack+0xc1/0x124
[   39.896705]  [<ffffffff813a834a>] print_circular_bug.cold.34+0x2f7/0x432
[   39.903517]  [<ffffffff811ff0fc>] __lock_acquire+0x3e6c/0x5f10
[   39.909470]  [<ffffffff811fb290>] ? trace_hardirqs_on+0x10/0x10
[   39.915503]  [<ffffffff81202cde>] lock_acquire+0x15e/0x450
[   39.921103]  [<ffffffff81963767>] ? sel_commit_bools_write+0x87/0x250
[   39.927657]  [<ffffffff81963767>] ? sel_commit_bools_write+0x87/0x250
[   39.934212]  [<ffffffff826fad9b>] mutex_lock_nested+0xbb/0x8d0
[   39.940157]  [<ffffffff81963767>] ? sel_commit_bools_write+0x87/0x250
[   39.946713]  [<ffffffff812abe1a>] ? is_module_text_address+0x2a/0x50
[   39.953234]  [<ffffffff8112f14b>] ? __kernel_text_address+0x6b/0xa0
[   39.959643]  [<ffffffff826face0>] ? mutex_trylock+0x3e0/0x3e0
[   39.965508]  [<ffffffff81012d44>] ? dump_trace+0x184/0x360
[   39.971108]  [<ffffffff81963767>] sel_commit_bools_write+0x87/0x250
[   39.977490]  [<ffffffff819636e0>] ? sel_read_mls+0xc0/0xc0
[   39.983090]  [<ffffffff811f7e29>] ? add_lock_to_list.isra.8.constprop.24+0x149/0x280
[   39.990946]  [<ffffffff81490c1c>] __vfs_write+0x11c/0x3e0
[   39.996454]  [<ffffffff819636e0>] ? sel_read_mls+0xc0/0xc0
[   40.002050]  [<ffffffff81490b00>] ? __vfs_read+0x3d0/0x3d0
[   40.007651]  [<ffffffff811fb290>] ? trace_hardirqs_on+0x10/0x10
[   40.013684]  [<ffffffff81490fea>] __kernel_write+0x10a/0x350
[   40.019458]  [<ffffffff8152c05d>] write_pipe_buf+0x15d/0x1f0
[   40.025237]  [<ffffffff811fb07b>] ? trace_hardirqs_on_caller+0x38b/0x590
[   40.032056]  [<ffffffff8152bf00>] ? do_splice_direct+0x270/0x270
[   40.038181]  [<ffffffff8152cac8>] ? splice_from_pipe_next.part.3+0x248/0x310
[   40.045343]  [<ffffffff8152cef4>] __splice_from_pipe+0x364/0x790
[   40.051463]  [<ffffffff8152bf00>] ? do_splice_direct+0x270/0x270
[   40.057581]  [<ffffffff8152ffb9>] splice_from_pipe+0xf9/0x170
[   40.063439]  [<ffffffff8152bf00>] ? do_splice_direct+0x270/0x270
[   40.069558]  [<ffffffff8152fec0>] ? splice_shrink_spd+0x60/0x60
[   40.075587]  [<ffffffff815300bc>] default_file_splice_write+0x3c/0x80
[   40.082138]  [<ffffffff81530080>] ? generic_splice_sendpage+0x50/0x50
[   40.088736]  [<ffffffff81531181>] SyS_splice+0xde1/0x1430
[   40.094257]  [<ffffffff812949ae>] ? SyS_futex+0x24e/0x360
[   40.099770]  [<ffffffff81492a36>] ? vfs_write+0x2e6/0x4e0
[   40.105663]  [<ffffffff815303a0>] ? compat_SyS_vmsplice+0x160/0x160
[   40.112045]  [<ffffffff810022d4>] ? lockdep_sys_exit_thunk+0x12/0x14
[   40.118513]  [<ffffffff827062e1>] entry_SYSCALL_64_fastpath+0x1e/0x9a
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