netlink: 41 bytes leftover after parsing attributes in process `syz-executor0'.
netlink: 41 bytes leftover after parsing attributes in process `syz-executor0'.
INFO: task syz-executor1:3724 blocked for more than 140 seconds.
      Not tainted 4.14.71+ #8
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor1   D29272  3724  30068 0x00000004
Call Trace:
 schedule+0x7f/0x1b0 kernel/sched/core.c:3490
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:565 [inline]
 rwsem_down_write_failed+0x390/0x730 kernel/locking/rwsem-xadd.c:594
 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105
 __down_write arch/x86/include/asm/rwsem.h:126 [inline]
 down_write+0x4f/0x90 kernel/locking/rwsem.c:56
 inode_lock include/linux/fs.h:713 [inline]
 ext4_file_write_iter+0x1fd/0xe20 fs/ext4/file.c:233
 call_write_iter include/linux/fs.h:1782 [inline]
 new_sync_write fs/read_write.c:471 [inline]
 __vfs_write+0x417/0x5c0 fs/read_write.c:484
 vfs_write+0x17f/0x4d0 fs/read_write.c:546
 SYSC_write fs/read_write.c:593 [inline]
 SyS_write+0xc2/0x1a0 fs/read_write.c:585
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x457679
RSP: 002b:00007f663b5f5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f663b5f66d4 RCX: 0000000000457679
RDX: 0000000000000015 RSI: 0000000020000080 RDI: 0000000000000004
RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d8b90 R14: 00000000004c540d R15: 0000000000000002

Showing all locks held in the system:
1 lock held by khungtaskd/23:
 #0:  (tasklist_lock){.+.+}, at: [<ffffffff93201e67>] debug_show_all_locks+0x74/0x20f kernel/locking/lockdep.c:4541
3 locks held by rs:main Q:Reg/1630:
 #0:  (&f->f_pos_lock){+.+.}, at: [<ffffffff935bd162>] __fdget_pos+0xa2/0xc0 fs/file.c:768
 #1:  (sb_writers#4){.+.+}, at: [<ffffffff9355ba57>] file_start_write include/linux/fs.h:2722 [inline]
 #1:  (sb_writers#4){.+.+}, at: [<ffffffff9355ba57>] vfs_write+0x3d7/0x4d0 fs/read_write.c:545
 #2:  (&sb->s_type->i_mutex_key#10){++++}, at: [<ffffffff93714f59>] inode_trylock include/linux/fs.h:733 [inline]
 #2:  (&sb->s_type->i_mutex_key#10){++++}, at: [<ffffffff93714f59>] ext4_file_write_iter+0x1b9/0xe20 fs/ext4/file.c:230
2 locks held by getty/1760:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff93d245e0>] tty_ldisc_ref_wait+0x20/0x80 drivers/tty/tty_ldisc.c:275
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff93d1fb5f>] n_tty_read+0x1ff/0x15e0 drivers/tty/n_tty.c:2142
2 locks held by syz-fuzzer/1784:
 #0:  (&mm->mmap_sem){++++}, at: [<ffffffff930b3a1d>] __do_page_fault+0x26d/0xb60 arch/x86/mm/fault.c:1354
 #1:  (sb_pagefaults){.+.+}, at: [<ffffffff9375fb57>] sb_start_pagefault include/linux/fs.h:1572 [inline]
 #1:  (sb_pagefaults){.+.+}, at: [<ffffffff9375fb57>] ext4_page_mkwrite+0x167/0xf40 fs/ext4/inode.c:6084
2 locks held by syz-fuzzer/1790:
 #0:  (&mm->mmap_sem){++++}, at: [<ffffffff930b3a1d>] __do_page_fault+0x26d/0xb60 arch/x86/mm/fault.c:1354
 #1:  (sb_pagefaults){.+.+}, at: [<ffffffff9375fb57>] sb_start_pagefault include/linux/fs.h:1572 [inline]
 #1:  (sb_pagefaults){.+.+}, at: [<ffffffff9375fb57>] ext4_page_mkwrite+0x167/0xf40 fs/ext4/inode.c:6084
2 locks held by syz-executor4/1849:
 #0:  (&type->i_mutex_dir_key){++++}, at: [<ffffffff93597189>] inode_lock_shared include/linux/fs.h:723 [inline]
 #0:  (&type->i_mutex_dir_key){++++}, at: [<ffffffff93597189>] iterate_dir+0xb9/0x5e0 fs/readdir.c:41
 #1:  (sb_writers#4){.+.+}, at: [<ffffffff935b7674>] sb_start_write_trylock include/linux/fs.h:1548 [inline]
 #1:  (sb_writers#4){.+.+}, at: [<ffffffff935b7674>] touch_atime+0x144/0x270 fs/inode.c:1723
3 locks held by syz-executor3/1850:
 #0:  (sb_writers#4){.+.+}, at: [<ffffffff935c53ea>] sb_start_write include/linux/fs.h:1543 [inline]
 #0:  (sb_writers#4){.+.+}, at: [<ffffffff935c53ea>] mnt_want_write+0x3a/0xa0 fs/namespace.c:387
 #1:  (&type->i_mutex_dir_key/1){+.+.}, at: [<ffffffff9358f223>] inode_lock_nested include/linux/fs.h:748 [inline]
 #1:  (&type->i_mutex_dir_key/1){+.+.}, at: [<ffffffff9358f223>] do_unlinkat+0x273/0x650 fs/namei.c:4083
 #2:  (&sb->s_type->i_mutex_key#10){++++}, at: [<ffffffff9357c505>] inode_lock include/linux/fs.h:713 [inline]
 #2:  (&sb->s_type->i_mutex_key#10){++++}, at: [<ffffffff9357c505>] vfs_unlink2+0xc5/0x470 fs/namei.c:4017
2 locks held by syz-executor2/1851:
 #0:  (&type->i_mutex_dir_key){++++}, at: [<ffffffff93597189>] inode_lock_shared include/linux/fs.h:723 [inline]
 #0:  (&type->i_mutex_dir_key){++++}, at: [<ffffffff93597189>] iterate_dir+0xb9/0x5e0 fs/readdir.c:41
 #1:  (sb_writers#4){.+.+}, at: [<ffffffff935b7674>] sb_start_write_trylock include/linux/fs.h:1548 [inline]
 #1:  (sb_writers#4){.+.+}, at: [<ffffffff935b7674>] touch_atime+0x144/0x270 fs/inode.c:1723
4 locks held by kworker/u4:6/2513:
 #0:  ("writeback"){+.+.}, at: [<ffffffff931275d7>] process_one_work+0x787/0x15c0 kernel/workqueue.c:2085
 #1:  ((&(&wb->dwork)->work)){+.+.}, at: [<ffffffff9312760f>] process_one_work+0x7bf/0x15c0 kernel/workqueue.c:2089
 #2:  (&type->s_umount_key#34){++++}, at: [<ffffffff935628fa>] trylock_super+0x1a/0xe0 fs/super.c:402
 #3:  (&sbi->s_journal_flag_rwsem){++++}, at: [<ffffffff93453770>] do_writepages+0xe0/0x270 mm/page-writeback.c:2341
2 locks held by syz-executor5/7018:
 #0:  (&type->i_mutex_dir_key){++++}, at: [<ffffffff93597189>] inode_lock_shared include/linux/fs.h:723 [inline]
 #0:  (&type->i_mutex_dir_key){++++}, at: [<ffffffff93597189>] iterate_dir+0xb9/0x5e0 fs/readdir.c:41
 #1:  (sb_writers#4){.+.+}, at: [<ffffffff935b7674>] sb_start_write_trylock include/linux/fs.h:1548 [inline]
 #1:  (sb_writers#4){.+.+}, at: [<ffffffff935b7674>] touch_atime+0x144/0x270 fs/inode.c:1723
2 locks held by syz-executor2/8958:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff93d245e0>] tty_ldisc_ref_wait+0x20/0x80 drivers/tty/tty_ldisc.c:275
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff93d1fb5f>] n_tty_read+0x1ff/0x15e0 drivers/tty/n_tty.c:2142
2 locks held by syz-executor0/22285:
 #0:  (&type->i_mutex_dir_key){++++}, at: [<ffffffff93597189>] inode_lock_shared include/linux/fs.h:723 [inline]
 #0:  (&type->i_mutex_dir_key){++++}, at: [<ffffffff93597189>] iterate_dir+0xb9/0x5e0 fs/readdir.c:41
 #1:  (sb_writers#4){.+.+}, at: [<ffffffff935b7674>] sb_start_write_trylock include/linux/fs.h:1548 [inline]
 #1:  (sb_writers#4){.+.+}, at: [<ffffffff935b7674>] touch_atime+0x144/0x270 fs/inode.c:1723
2 locks held by syz-executor4/23039:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff93d245e0>] tty_ldisc_ref_wait+0x20/0x80 drivers/tty/tty_ldisc.c:275
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff93d1fb5f>] n_tty_read+0x1ff/0x15e0 drivers/tty/n_tty.c:2142
2 locks held by syz-executor5/29170:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff93d245e0>] tty_ldisc_ref_wait+0x20/0x80 drivers/tty/tty_ldisc.c:275
 #1:  (&tty->atomic_write_lock){+.+.}, at: [<ffffffff93d0a16b>] tty_write_lock+0x1b/0x60 drivers/tty/tty_io.c:883
1 lock held by syz-executor1/31316:
 #0:  (&pipe->mutex/1){+.+.}, at: [<ffffffff935726d8>] pipe_lock_nested fs/pipe.c:67 [inline]
 #0:  (&pipe->mutex/1){+.+.}, at: [<ffffffff935726d8>] pipe_lock+0x58/0x70 fs/pipe.c:75
3 locks held by syz-executor1/3720:
 #0:  (sb_writers#4){.+.+}, at: [<ffffffff935c55ea>] sb_start_write include/linux/fs.h:1543 [inline]
 #0:  (sb_writers#4){.+.+}, at: [<ffffffff935c55ea>] mnt_want_write_file+0xfa/0x300 fs/namespace.c:498
 #1:  (&journal->j_barrier){+.+.}, at: [<ffffffff93825e69>] jbd2_journal_lock_updates+0x2e9/0x4b0 fs/jbd2/transaction.c:761
 #2:  (&journal->j_checkpoint_mutex){+.+.}, at: [<ffffffff93849690>] jbd2_journal_flush+0x140/0x4f0 fs/jbd2/journal.c:1987
2 locks held by syz-executor1/3723:
 #0:  (sb_writers#4){.+.+}, at: [<ffffffff935c53ea>] sb_start_write include/linux/fs.h:1543 [inline]
 #0:  (sb_writers#4){.+.+}, at: [<ffffffff935c53ea>] mnt_want_write+0x3a/0xa0 fs/namespace.c:387
 #1:  (&sb->s_type->i_mutex_key#10){++++}, at: [<ffffffff9355084d>] inode_lock include/linux/fs.h:713 [inline]
 #1:  (&sb->s_type->i_mutex_key#10){++++}, at: [<ffffffff9355084d>] do_truncate2+0xfd/0x1c0 fs/open.c:61
3 locks held by syz-executor1/3724:
 #0:  (&f->f_pos_lock){+.+.}, at: [<ffffffff935bd162>] __fdget_pos+0xa2/0xc0 fs/file.c:768
 #1:  (sb_writers#4){.+.+}, at: [<ffffffff9355ba57>] file_start_write include/linux/fs.h:2722 [inline]
 #1:  (sb_writers#4){.+.+}, at: [<ffffffff9355ba57>] vfs_write+0x3d7/0x4d0 fs/read_write.c:545
 #2:  (&sb->s_type->i_mutex_key#10){++++}, at: [<ffffffff93714f9d>] inode_lock include/linux/fs.h:713 [inline]
 #2:  (&sb->s_type->i_mutex_key#10){++++}, at: [<ffffffff93714f9d>] ext4_file_write_iter+0x1fd/0xe20 fs/ext4/file.c:233

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

NMI backtrace for cpu 0
CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.71+ #8
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xb9/0x11b lib/dump_stack.c:53
 nmi_cpu_backtrace.cold.0+0x47/0x85 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x121/0x146 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:196 [inline]
 watchdog+0x574/0xa70 kernel/hung_task.c:252
 kthread+0x348/0x420 kernel/kthread.c:232
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3358 Comm: syz-executor3 Not tainted 4.14.71+ #8
task: ffff8801a067c680 task.stack: ffff8801a43b8000
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60
RSP: 0018:ffff8801a43bff00 EFLAGS: 00000282
RAX: ffffffffffffffff RBX: ffff8801a43bff58 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff969d3aa0
RBP: ffffffffffffffff R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801a067c680
R13: ffff8801a43bffd0 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fb7c90c1700(0000) GS:ffff8801db900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe26df2fc8 CR3: 00000001a6848005 CR4: 00000000001606a0
Call Trace:
 do_syscall_64+0x79/0x4b0 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x457679
RSP: 002b:00007fb7c90c0cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffff001 RBX: 000000000072bf08 RCX: 0000000000457679
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000072bf08
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000072bf0c
R13: 00007fff6484317f R14: 00007fb7c90c19c0 R15: 0000000000000000
Code: ff ff 48 89 df e8 b1 f8 21 00 e9 9f fe ff ff 4c 89 e7 e8 a4 f8 21 00 e9 2c fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <65> 48 8b 04 25 c0 de 01 00 48 85 c0 74 1a 65 8b 15 2b 25 d1 6c