INFO: task udevd:10693 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:22232 pid:10693 tgid:10693 ppid:5283   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x1550/0x5060
 schedule+0x164/0x360
 io_schedule+0x7f/0xd0
 folio_wait_bit_common+0x6d8/0xbc0
 do_read_cache_folio+0x1ad/0x590
 read_part_sector+0xb6/0x2b0
 adfspart_check_POWERTEC+0x92/0xef0
 bdev_disk_changed+0x765/0x14c0
 blkdev_get_whole+0x380/0x510
 bdev_open+0x31e/0xd30
 blkdev_open+0x470/0x610
 do_dentry_open+0x7ce/0x1420
 vfs_open+0x3b/0x340
 path_openat+0x3486/0x3e20
 do_filp_open+0x22d/0x490
 do_sys_openat2+0x12f/0x220
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xf0/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc192b169a4
RSP: 002b:00007fff5b1e7190 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000056547a5dac30 RCX: 00007fc192b169a4
RDX: 00000000000a0800 RSI: 000056547a5b4310 RDI: 00000000ffffff9c
RBP: 000056547a5b4310 R08: 0000000000000001 R09: 3fffffffffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 000056547a5c7800 R14: 0000000000000001 R15: 000056547a5b3910
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: ffffffff8e341aa0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5664:
 #0: ffff8881761aa0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0
1 lock held by udevd/10693:
 #0: ffff888109eeb358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xe0/0xd30
1 lock held by udevd/14937:
 #0: ffff88810a02b358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xe0/0xd30
5 locks held by syz.5.6162/26930:
2 locks held by syz.5.6162/26931:
1 lock held by syz.3.6176/26966:
 #0: ffffffff8f717ea8 (bpf_dispatcher_xdp.mutex){+.+.}-{4:4}, at: bpf_dispatcher_change_prog+0xc6/0xd70
2 locks held by syz.5.6177/26967:
 #0: ffff8881195eb808 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}, at: sock_close+0x9b/0x240
 #1: ffffffff8e3475f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3f2/0x7e0

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 35 Comm: khungtaskd Not tainted syzkaller #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+0x1a9/0x280
 nmi_cpu_backtrace+0x3a9/0x3e0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xf90/0xfe0
 kthread+0x726/0x8b0
 ret_from_fork+0x5b0/0xb20
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 26931 Comm: syz.5.6162 Not tainted syzkaller #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:rcu_is_watching+0x74/0xb0
Code: 92 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 34 8b 03 65 ff 0d 69 f4 16 11 74 11 83 e0 04 c1 e8 02 5b 41 5e 41 5f <e9> c7 33 d1 09 cc e8 51 be 8a ff eb e8 48 c7 c7 40 78 34 8e 48 89
RSP: 0018:ffffc9000572e620 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffffff8233c179 RCX: 84b7a4cc6d1fbb00
RDX: 00000000eccb0cf8 RSI: ffffffff8be08d40 RDI: ffffffff8be08d00
RBP: 0000000000000cc0 R08: ffffffff8233c179 R09: ffffffff8e341aa0
R10: dffffc0000000000 R11: fffffbfff1f849ef R12: ffffea00063e3c88
R13: dffffc0000000000 R14: ffff888175895e90 R15: 0000000000000000
FS:  00007f094ae6c6c0(0000) GS:ffff8882a9a22000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f58eede8400 CR3: 0000000034516000 CR4: 00000000000006f0
DR0: 0000200000000140 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 percpu_ref_put+0xb5/0x180
 __mem_cgroup_charge+0x56/0x80
 shmem_alloc_and_add_folio+0x7d0/0xf80
 shmem_get_folio_gfp+0x5a9/0x1670
 shmem_write_begin+0x16c/0x330
 generic_perform_write+0x2e2/0x8f0
 shmem_file_write_iter+0xf8/0x120
 __kernel_write_iter+0x41e/0x880
 dump_user_range+0x8ba/0xc70
 elf_core_dump+0x34c2/0x3ad0
 coredump_write+0x11de/0x1980
 vfs_coredump+0x369e/0x4270
 get_signal+0x1107/0x1330
 arch_do_signal_or_restart+0xbc/0x830
 irqentry_exit+0x175/0x610
 exc_general_protection+0x169/0x1f0
 asm_exc_general_protection+0x26/0x30
RIP: 0033:0x7f0949f9acc1
Code: 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 48 3d 01 f0 ff ff 73 01 <c3> 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:00002000000002a0 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f094a205fa0 RCX: 00007f0949f9acb9
RDX: 0000200000000000 RSI: 00002000000002a0 RDI: 0000000084040400
RBP: 00007f094a008bf7 R08: 00002000000002c0 R09: 00002000000002c0
R10: 00002000000001c0 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f094a206038 R14: 00007f094a205fa0 R15: 00007ffce6e92bb8
 </TASK>
