binder: undelivered TRANSACTION_ERROR: 29189
binder: send failed reply for transaction 13, target dead
INFO: task syz-executor5:3884 blocked for more than 140 seconds.
      Not tainted 4.9.120-gf85543b #24
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor5   D28184  3884      1 0x00000004
 ffff8801cd516000 ffff8801c3fe0a80 ffff8801c3fe0fc0 ffff8801b79cc800
 ffff8801db221c18 ffff8801a57af4e0 ffffffff839eedcd ffffffff81237347
 0000000000000000 ffff8801cd5168c0 0000000600000007 ffff8801db2224e8
Call Trace:
 [<ffffffff839f03cf>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
 [<ffffffff839fa7f4>] rwsem_down_read_failed+0x1e4/0x320 kernel/locking/rwsem-xadd.c:260
 [<ffffffff81eec308>] call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
 [<ffffffff839f9722>] __down_read arch/x86/include/asm/rwsem.h:65 [inline]
 [<ffffffff839f9722>] down_read+0x52/0xb0 kernel/locking/rwsem.c:24
 [<ffffffff81597c61>] inode_lock_shared include/linux/fs.h:776 [inline]
 [<ffffffff81597c61>] lookup_slow+0x141/0x470 fs/namei.c:1645
 [<ffffffff815a42e6>] walk_component+0x716/0x1bb0 fs/namei.c:1784
 [<ffffffff815a6009>] link_path_walk+0x889/0x1200 fs/namei.c:2120
 [<ffffffff815a707d>] path_openat+0x1ad/0x3590 fs/namei.c:3533
 [<ffffffff815ae727>] do_filp_open+0x197/0x270 fs/namei.c:3568
 [<ffffffff81570efd>] do_sys_open+0x30d/0x5c0 fs/open.c:1072
 [<ffffffff815711dd>] SYSC_open fs/open.c:1090 [inline]
 [<ffffffff815711dd>] SyS_open+0x2d/0x40 fs/open.c:1085
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839ffcd3>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

Showing all locks held in the system:
2 locks held by khungtaskd/519:
 #0:  (rcu_read_lock){......}, at: [<ffffffff813684dc>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff813684dc>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff81427d48>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
2 locks held by rs:main Q:Reg/3679:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff815db00c>] __fdget_pos+0xac/0xd0 fs/file.c:781
 #1:  (sb_writers#3){.+.+.+}, at: [<ffffffff81575c7e>] file_start_write include/linux/fs.h:2640 [inline]
 #1:  (sb_writers#3){.+.+.+}, at: [<ffffffff81575c7e>] vfs_write+0x3ae/0x530 fs/read_write.c:556
2 locks held by getty/3777:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff839fde72>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+.+.}, at: [<ffffffff82123d42>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142
1 lock held by syz-executor5/3884:
 #0:  (&sb->s_type->i_mutex_key#23){++++++}, at: [<ffffffff81597c61>] inode_lock_shared include/linux/fs.h:776 [inline]
 #0:  (&sb->s_type->i_mutex_key#23){++++++}, at: [<ffffffff81597c61>] lookup_slow+0x141/0x470 fs/namei.c:1645
2 locks held by syz-executor5/15086:
 #0:  (sb_writers#18){.+.+.+}, at: [<ffffffff815e38ef>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#18){.+.+.+}, at: [<ffffffff815e38ef>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&sb->s_type->i_mutex_key#23){++++++}, at: [<ffffffff815a7da5>] inode_lock include/linux/fs.h:766 [inline]
 #1:  (&sb->s_type->i_mutex_key#23){++++++}, at: [<ffffffff815a7da5>] do_last fs/namei.c:3312 [inline]
 #1:  (&sb->s_type->i_mutex_key#23){++++++}, at: [<ffffffff815a7da5>] path_openat+0xed5/0x3590 fs/namei.c:3534

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

NMI backtrace for cpu 0
CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.120-gf85543b #24
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d85afd08 ffffffff81eb8049 0000000000000000 0000000000000000
 0000000000000000 0000000000000001 ffffffff810b9fa0 ffff8801d85afd40
 ffffffff81ec3357 0000000000000000 0000000000000000 0000000000000003
Call Trace:
 [<ffffffff81eb8049>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb8049>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81ec3357>] nmi_cpu_backtrace.cold.2+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81ec32ea>] nmi_trigger_cpumask_backtrace+0x12a/0x14f lib/nmi_backtrace.c:60
 [<ffffffff810ba0a4>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff81368a74>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff81368a74>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff81368a74>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff81368a74>] watchdog+0x6b4/0xa20 kernel/hung_task.c:239
 [<ffffffff8119ee0d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff839ffe9c>] 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: 15081 Comm: syz-executor5 Not tainted 4.9.120-gf85543b #24
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff880198334800 task.stack: ffff8801d8190000
RIP: 0010:[<ffffffff812813b7>] 
c [<ffffffff812813b7>] __read_once_size include/linux/compiler.h:243 [inline]
RIP: 0010:[<ffffffff812813b7>] 
c [<ffffffff812813b7>] atomic_read arch/x86/include/asm/atomic.h:26 [inline]
RIP: 0010:[<ffffffff812813b7>] 
c [<ffffffff812813b7>] __rcu_is_watching kernel/rcu/tree.c:1053 [inline]
RIP: 0010:[<ffffffff812813b7>] 
c [<ffffffff812813b7>] rcu_is_watching+0x67/0xa0 kernel/rcu/tree.c:1067
RSP: 0018:ffff8801d81971d8  EFLAGS: 00000202
RAX: 0000000000000007 RBX: ffff8801db31a71c RCX: 1ffffffff0886881
RDX: 0000000000000000 RSI: ffffffff81f1fa9b RDI: ffffffff84434408
RBP: ffff8801d81971e8 R08: ffff880198335160 R09: 0000000000000001
R10: ffff880198334800 R11: 1ffff10033066a27 R12: 0000000000000007
R13: dffffc0000000000 R14: 0000000002420848 R15: ffff8801d9c16548
FS:  00007f6b2171d700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000002042000 CR3: 00000001c8492000 CR4: 00000000001606f0
Stack:
 ffff8801d81971e8
c ffff8801d9c16548
c ffff8801d8197250
c ffffffff8143af4e
c
 ffffffff8143aba0
c ffffffff816270f3
c ffff8801d9c16414
c 0000000000000008
c
 ffff8801d9c161c0
c 000000000000000f
c 0000000000000003
c 0000000000000007
c
Call Trace:
 [<ffffffff8143af4e>] rcu_read_lock include/linux/rcupdate.h:876 [inline]
 [<ffffffff8143af4e>] find_get_entry+0x3ae/0x540 mm/filemap.c:1090
 [<ffffffff8143c01b>] pagecache_get_page+0x4b/0x720 mm/filemap.c:1201
 [<ffffffff816283c9>] find_or_create_page include/linux/pagemap.h:309 [inline]
 [<ffffffff816283c9>] grow_dev_page fs/buffer.c:1005 [inline]
 [<ffffffff816283c9>] grow_buffers fs/buffer.c:1078 [inline]
 [<ffffffff816283c9>] __getblk_slow fs/buffer.c:1105 [inline]
 [<ffffffff816283c9>] __getblk_gfp+0x249/0x710 fs/buffer.c:1386
 [<ffffffff8162bcad>] __bread_gfp+0x2d/0x270 fs/buffer.c:1420
 [<ffffffff818bad48>] sb_bread include/linux/buffer_head.h:300 [inline]
 [<ffffffff818bad48>] fat__get_entry+0x4c8/0x8f0 fs/fat/dir.c:100
 [<ffffffff818c2b47>] fat_get_entry fs/fat/dir.c:128 [inline]
 [<ffffffff818c2b47>] fat_search_long+0x277/0x1180 fs/fat/dir.c:477
 [<ffffffff818dd0b4>] vfat_find+0x134/0x180 fs/fat/namei_vfat.c:708
 [<ffffffff818dd891>] vfat_lookup+0xe1/0x530 fs/fat/namei_vfat.c:731
 [<ffffffff8159e15d>] lookup_open+0x63d/0x1930 fs/namei.c:3203
 [<ffffffff815a7dc8>] do_last fs/namei.c:3315 [inline]
 [<ffffffff815a7dc8>] path_openat+0xef8/0x3590 fs/namei.c:3534
 [<ffffffff815ae727>] do_filp_open+0x197/0x270 fs/namei.c:3568
 [<ffffffff81570efd>] do_sys_open+0x30d/0x5c0 fs/open.c:1072
 [<ffffffff81571220>] SYSC_openat fs/open.c:1099 [inline]
 [<ffffffff81571220>] SyS_openat+0x30/0x40 fs/open.c:1093
 [<ffffffff81006316>] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282
 [<ffffffff839ffcd3>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 
c54 
c48 
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c48 
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c00 
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c00 
c00 
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cdf 
c48 
c89 
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cc1 
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c14 
c02 
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ce0 
c07 
c83 
cc0 
c03 
c38 
cd0 
c7c 
c04 
c<84> 
cd2 
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ce0 
c01 
c65 
cff 
c0d 
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cd9 
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cc4 
c