INFO: task syz.5.10161:28851 blocked for more than 143 seconds.
      Not tainted 6.16.0-syzkaller-11113-gf3af62b6cee8 #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.10161     state:D stack:25896 pid:28851 tgid:28850 ppid:25359  task_flags:0x40054c flags:0x00004002
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x872/0xfe0
 down_write+0x1ab/0x1f0
 exit_mmap+0x28e/0xb50
 __mmput+0x118/0x430
 exit_mm+0x1da/0x2c0
 do_exit+0x648/0x2300
 do_group_exit+0x21c/0x2d0
 get_signal+0x1286/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 exit_to_user_mode_loop+0x75/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd94f38eb69
RSP: 002b:00007fd94d1f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: 0000000000000006 RBX: 00007fd94f5b5fa0 RCX: 00007fd94f38eb69
RDX: 0000000000000018 RSI: 00002000000003c0 RDI: 0000000000000011
RBP: 00007fd94f411df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd94f5b5fa0 R15: 00007ffcbebff2a8
 </TASK>

Showing all locks held in the system:
4 locks held by kworker/u8:0/12:
1 lock held by rcu_exp_gp_kthr/18:
1 lock held by khungtaskd/34:
 #0: ffffffff8e139e60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5669:
 #0: ffff88810fa080a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
1 lock held by syz-executor/5832:
1 lock held by syz.5.10161/28851:
 #0: ffff888107eface0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x28e/0xb50
2 locks held by syz-executor/3308:
 #0: ffffffff8ed734c0 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250
 #1: ffffffff8f5327c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8db/0x1c70
2 locks held by syz-executor/3317:
 #0: ffffffff8eca2e60 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250
 #1: ffffffff8f5327c8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8db/0x1c70
1 lock held by syz.0.12950/3345:
 #0: ffffffff8f5327c8 (rtnl_mutex){+.+.}-{4:4}, at: __tun_chr_ioctl+0x37a/0x1df0
1 lock held by syz.0.12950/3346:
 #0: ffffffff8f5327c8 (rtnl_mutex){+.+.}-{4:4}, at: __tun_chr_ioctl+0x37a/0x1df0

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: khungtaskd Not tainted 6.16.0-syzkaller-11113-gf3af62b6cee8 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5830 Comm: sshd Not tainted 6.16.0-syzkaller-11113-gf3af62b6cee8 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:error_entry+0x66/0x140
Code: ed 45 31 f6 45 31 ff f6 84 24 90 00 00 00 03 74 4e 0f 01 f8 0f 1f 00 66 90 0f 20 d8 0f 1f 44 00 00 48 25 ff e7 ff ff 0f 22 d8 <eb> 15 b9 48 00 00 00 65 48 8b 15 cb 75 9f 11 89 d0 48 c1 ea 20 0f
RSP: 0000:fffffe0000002f50 EFLAGS: 00000006
RAX: 0000000028094000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f6067cf3000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f60682c9800(0000) GS:ffff8880b862a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6067cf3000 CR3: 0000000028094000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <ENTRY_TRAMPOLINE>
RIP: 0033:0x7f6067f2e92f
RSP: 002b:00007ffe5d0fe108 EFLAGS: 00010246 ORIG_RAX: 0000000000000006
RAX: 0000000000000000 RBX: 00007ffe5d0fe2c0 RCX: 000000000011ac10
RDX: ffffffffffffffff RSI: 00000000002dac00 RDI: 00007f6067cf3000
RBP: 000056439acd4450 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 000056439acd32e0
R13: 0000564379a2c937 R14: 000056439acce1c0 R15: 000056439acd42e0
 </ENTRY_TRAMPOLINE>
