netlink: 8 bytes leftover after parsing attributes in process `syz-executor.0'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.0'.
INFO: task syz-executor.4:28167 blocked for more than 140 seconds.
      Not tainted 4.14.123+ #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D28808 28167   1852 0x80000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3498
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
 rwsem_down_read_failed+0x21f/0x3c0 kernel/locking/rwsem-xadd.c:309
 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:66 [inline]
 down_read+0x45/0xa0 kernel/locking/rwsem.c:26
 exit_mm kernel/exit.c:511 [inline]
 do_exit+0x503/0x2960 kernel/exit.c:861
INFO: task syz-executor.4:28172 blocked for more than 140 seconds.
      Not tainted 4.14.123+ #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D28920 28172   1852 0x80000004
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3498
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
 rwsem_down_read_failed+0x21f/0x3c0 kernel/locking/rwsem-xadd.c:309
 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:66 [inline]
 down_read+0x45/0xa0 kernel/locking/rwsem.c:26
 exit_mm kernel/exit.c:511 [inline]
 do_exit+0x503/0x2960 kernel/exit.c:861

Showing all locks held in the system:
1 lock held by khungtaskd/23:
 #0:  (tasklist_lock){.+.+}, at: [<000000008e614b52>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541
1 lock held by rsyslogd/1629:
 #0:  (&f->f_pos_lock){+.+.}, at: [<00000000a1f64d5d>] __fdget_pos+0xa6/0xc0 fs/file.c:769
2 locks held by getty/1757:
 #0:  (&tty->ldisc_sem){++++}, at: [<0000000052bb5d44>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<000000000732ed28>] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156
1 lock held by syz-executor.4/28167:
 #0:  (&mm->mmap_sem){++++}, at: [<000000006769fec1>] exit_mm kernel/exit.c:511 [inline]
 #0:  (&mm->mmap_sem){++++}, at: [<000000006769fec1>] do_exit+0x503/0x2960 kernel/exit.c:861
1 lock held by syz-executor.4/28172:
 #0:  (&mm->mmap_sem){++++}, at: [<000000006769fec1>] exit_mm kernel/exit.c:511 [inline]
 #0:  (&mm->mmap_sem){++++}, at: [<000000006769fec1>] do_exit+0x503/0x2960 kernel/exit.c:861

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

NMI backtrace for cpu 1
CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.123+ #2
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xb9/0x10e lib/dump_stack.c:53
 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 28175 Comm: syz-executor.4 Not tainted 4.14.123+ #2
task: 00000000bb46ce13 task.stack: 00000000ad8ee18d
RIP: 0010:mark_lock+0x13/0xfa0 kernel/locking/lockdep.c:3157
RSP: 0018:ffff88819fd77878 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff8881d03d377a RCX: 0000000000000002
RDX: 0000000000000002 RSI: ffff8881d03d3758 RDI: ffff8881d03d2f00
RBP: ffff88819fd77a48 R08: 0000000000000001 R09: 00000000000403d6
R10: ffff8881d03d3758 R11: 1ffff1103a07a6ea R12: ffff8881d03d3770
R13: 00000000000003d6 R14: 0000000000000001 R15: 0000000000000002
FS:  00007fc34f5f1700(0000) GS:ffff8881d7600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f28211c6280 CR3: 0000000181e92005 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 mark_irqflags kernel/locking/lockdep.c:3082 [inline]
 __lock_acquire+0xdd3/0x3fa0 kernel/locking/lockdep.c:3444
Code: 5d 41 5e 41 5f c3 4c 89 ff e8 ba 8a 33 00 eb d7 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 57 89 d1 41 89 d7 41 56 <49> 89 fe 41 55 4c 8d 6e 20 4c 89 ea 41 54 41 bc 01 00 00 00 55