binder_alloc: 24401: binder_alloc_buf, no vma
binder: 24401:24473 transaction failed 29189/-3, size 0-0 line 3133
binder_alloc: 24401: binder_alloc_buf, no vma
binder: 24401:24469 transaction failed 29189/-3, size 0-0 line 3133
binder: send failed reply for transaction 429, target dead
INFO: task kworker/u4:3:1613 blocked for more than 120 seconds.
      Not tainted 4.9.96-g320d53a #7
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u4:3    D25160  1613      2 0x00000000
Workqueue: events_unbound flush_to_ldisc
 ffff8801cfa28000 0000000000000000 ffff8801c8edf480 ffff8801d412b000
 ffff8801db321b98 ffff8801cfa376c8 ffffffff839e240d ffffffff81233817
 0000000000000000 ffff8801cfa288c0 0000000600000007 ffff8801db322468
Call Trace:
 [<ffffffff839e3a0f>] schedule+0x7f/0x1b0 kernel/sched/core.c:3557
 [<ffffffff839ef048>] __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:526 [inline]
 [<ffffffff839ef048>] rwsem_down_write_failed+0x598/0x990 kernel/locking/rwsem-xadd.c:555
 [<ffffffff81ee4e77>] call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105
 [<ffffffff839ece1c>] __down_write arch/x86/include/asm/rwsem.h:125 [inline]
 [<ffffffff839ece1c>] down_write+0x5c/0xa0 kernel/locking/rwsem.c:54
 [<ffffffff8211a88d>] isig+0xbd/0x4c0 drivers/tty/n_tty.c:1100
 [<ffffffff8211b332>] n_tty_receive_signal_char+0x22/0xf0 drivers/tty/n_tty.c:1212
 [<ffffffff8211f561>] n_tty_receive_char_special+0x10e1/0x2860 drivers/tty/n_tty.c:1258
 [<ffffffff82122c2a>] n_tty_receive_buf_fast drivers/tty/n_tty.c:1579 [inline]
 [<ffffffff82122c2a>] __receive_buf drivers/tty/n_tty.c:1613 [inline]
 [<ffffffff82122c2a>] n_tty_receive_buf_common+0x18ea/0x2300 drivers/tty/n_tty.c:1711
 [<ffffffff82123673>] n_tty_receive_buf2+0x33/0x40 drivers/tty/n_tty.c:1746
 [<ffffffff8212917f>] tty_ldisc_receive_buf+0xaf/0x190 drivers/tty/tty_buffer.c:455
 [<ffffffff8212a183>] receive_buf drivers/tty/tty_buffer.c:474 [inline]
 [<ffffffff8212a183>] flush_to_ldisc+0x253/0x370 drivers/tty/tty_buffer.c:533
 [<ffffffff8118ae31>] process_one_work+0x7e1/0x1500 kernel/workqueue.c:2092
 [<ffffffff8118bc26>] worker_thread+0xd6/0x10a0 kernel/workqueue.c:2226
 [<ffffffff8119ad5d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff839f34dc>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373

Showing all locks held in the system:
2 locks held by khungtaskd/517:
 #0:  (rcu_read_lock){......}, at: [<ffffffff813646ec>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff813646ec>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff81423ce0>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
5 locks held by kworker/u4:3/1613:
 #0:  ("events_unbound"){.+.+.+}, at: [<ffffffff8118ad3e>] work_static include/linux/workqueue.h:186 [inline]
 #0:  ("events_unbound"){.+.+.+}, at: [<ffffffff8118ad3e>] set_work_data kernel/workqueue.c:617 [inline]
 #0:  ("events_unbound"){.+.+.+}, at: [<ffffffff8118ad3e>] set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
 #0:  ("events_unbound"){.+.+.+}, at: [<ffffffff8118ad3e>] process_one_work+0x6ee/0x1500 kernel/workqueue.c:2085
 #1:  ((&buf->work)){+.+...}, at: [<ffffffff8118ad78>] process_one_work+0x728/0x1500 kernel/workqueue.c:2089
 #2:  (&tty->ldisc_sem){++++++}, at: [<ffffffff82127940>] tty_ldisc_ref+0x20/0x80 drivers/tty/tty_ldisc.c:297
 #3:  (&port->buf.lock/1){+.+...}, at: [<ffffffff82129fb6>] flush_to_ldisc+0x86/0x370 drivers/tty/tty_buffer.c:505
 #4:  (&o_tty->termios_rwsem/1){++++..}, at: [<ffffffff8211a88d>] isig+0xbd/0x4c0 drivers/tty/n_tty.c:1100
2 locks held by getty/3773:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff839f14b2>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+.+.}, at: [<ffffffff8211c792>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2133

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 517 Comm: khungtaskd Not tainted 4.9.96-g320d53a #7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d9267d08 ffffffff81eb0b69 0000000000000000 0000000000000000
 0000000000000000 0000000000000001 ffffffff810b7d60 ffff8801d9267d40
 ffffffff81ebbe97 0000000000000000 0000000000000000 0000000000000002
Call Trace:
 [<ffffffff81eb0b69>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb0b69>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81ebbe97>] nmi_cpu_backtrace.cold.2+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81ebbe2a>] nmi_trigger_cpumask_backtrace+0x12a/0x14f lib/nmi_backtrace.c:60
 [<ffffffff810b7e64>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff81364c84>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff81364c84>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff81364c84>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff81364c84>] watchdog+0x6b4/0xa20 kernel/hung_task.c:239
 [<ffffffff8119ad5d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff839f34dc>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 24429 Comm: syz-executor2 Not tainted 4.9.96-g320d53a #7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88019bb63000 task.stack: ffff8801cb368000
RIP: 0010:[<ffffffff82118652>] 
c [<ffffffff82118652>] echo_buf drivers/tty/n_tty.c:146 [inline]
RIP: 0010:[<ffffffff82118652>] 
c [<ffffffff82118652>] __process_echoes+0x5e2/0x780 drivers/tty/n_tty.c:734
RSP: 0000:ffff8801cb36f8a8  EFLAGS: 00000202
RAX: 0000000000000fb6 RBX: ffffc90000210000 RCX: ffffc90000947000
RDX: ffffc90000212216 RSI: ffffffff8211863f RDI: ffffc90000212216
RBP: ffff8801cb36f910 R08: ffff88019bb63938 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000714b4ffb6
R13: 0000000000000127 R14: dffffc0000000000 R15: 0000000714b4ffb6
FS:  00007fee4b6d6700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbec760b000 CR3: 00000001cc8a0000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffc90000212270
c 0000000000001103
c ffffc90000212278
c ffffed0039b576d5
c
 ffff8801cdabb6ac
c ffffc90000210020
c 0000000000001f00
c ffff8801cdabb300
c
 ffffc90000210000
c ffff8801cdabb300
c 0000000000000127
c ffffc90000212300
c
Call Trace:
 [<ffffffff82119f87>] commit_echoes+0x147/0x1b0 drivers/tty/n_tty.c:766
 [<ffffffff8211f1e4>] n_tty_receive_char_special+0xd64/0x2860 drivers/tty/n_tty.c:1286
 [<ffffffff82122c2a>] n_tty_receive_buf_fast drivers/tty/n_tty.c:1579 [inline]
 [<ffffffff82122c2a>] __receive_buf drivers/tty/n_tty.c:1613 [inline]
 [<ffffffff82122c2a>] n_tty_receive_buf_common+0x18ea/0x2300 drivers/tty/n_tty.c:1711
 [<ffffffff821236b0>] n_tty_receive_buf+0x30/0x40 drivers/tty/n_tty.c:1740
 [<ffffffff82113aef>] tiocsti drivers/tty/tty_io.c:2314 [inline]
 [<ffffffff82113aef>] tty_ioctl+0xc8f/0x2270 drivers/tty/tty_io.c:2905
 [<ffffffff815b051c>] vfs_ioctl fs/ioctl.c:43 [inline]
 [<ffffffff815b051c>] file_ioctl fs/ioctl.c:493 [inline]
 [<ffffffff815b051c>] do_vfs_ioctl+0x1ac/0x11a0 fs/ioctl.c:677
 [<ffffffff815b159f>] SYSC_ioctl fs/ioctl.c:694 [inline]
 [<ffffffff815b159f>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:685
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839f3313>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 
cff 
c4c 
c89 
ce8 
c4c 
c29 
ce0 
c48 
c3d 
cdf 
c0e 
c00 
c00 
c0f 
c86 
ced 
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cff 
cff 
ce8 
cc1 
c43 
c24 
cff 
c4c 
c89 
ce0 
c25 
cff 
c0f 
c00 
c00 
c48 
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cbc 
c03 
c60 
c12 
c00 
c00 
c48 
c89 
cfa 
c<48> 
c89 
cf9 
c48 
cc1 
cea 
c03 
c83 
ce1 
c07 
c42 
c0f 
cb6 
c14 
c32 
c38 
cca 
c7f 
c08 
c84 
cd2 
c