INFO: task kworker/u8:2:33 blocked in I/O wait for more than 143 seconds.
      Tainted: G             L       syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this messag
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:2    state:D stack:20520 pid:33    tgid:33    ppid:2      task_flags:0x4248060 flags:0x00080000
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5583 [inline]
 __schedule+0x17dd/0x5820 kernel/sched/core.c:7382
 __schedule_loop kernel/sched/core.c:7459 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7474
 io_schedule+0x7f/0xd0 kernel/sched/core.c:8146
 rq_qos_wait+0x266/0x360 block/blk-rq-qos.c:307
 __wbt_wait block/blk-wbt.c:598 [inline]
 wbt_wait+0x326/0x550 block/blk-wbt.c:658
 __rq_qos_throttle+0x6b/0xb0 block/blk-rq-qos.c:66
 rq_qos_throttle block/blk-rq-qos.h:164 [inline]
 blk_mq_get_new_requests block/blk-mq.c:3046 [inline]
 blk_mq_submit_bio+0x1697/0x2c40 block/blk-mq.c:3188
 __submit_bio_noacct_mq block/blk-core.c:757 [inline]
 submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:791
 blk_crypto_submit_bio include/linux/blk-crypto.h:212 [inline]
 ext4_io_submit fs/ext4/page-io.c:399 [inline]
 io_submit_add_bh fs/ext4/page-io.c:455 [inline]
 ext4_bio_write_folio+0x101a/0x18c0 fs/ext4/page-io.c:550
 mpage_process_page_bufs+0x6bd/0x8a0 fs/ext4/inode.c:2327
 mpage_prepare_extent_to_map+0xf8d/0x1880 fs/ext4/inode.c:2875
 ext4_do_writepages+0xc08/0x44a0 fs/ext4/inode.c:3023
 ext4_writepages+0x1fe/0x4e0 fs/ext4/inode.c:3171
 do_writepages+0x338/0x560 mm/page-writeback.c:2560
 __writeback_single_inode+0x136/0x1220 fs/fs-writeback.c:1800
 writeback_sb_inodes+0x9de/0x1af0 fs/fs-writeback.c:2111
 __writeback_inodes_wb+0x114/0x240 fs/fs-writeback.c:2187
 wb_writeback+0x42f/0xad0 fs/fs-writeback.c:2298
 wb_check_start_all fs/fs-writeback.c:2424 [inline]
 wb_do_writeback fs/fs-writeback.c:2471 [inline]
 wb_workfn+0x980/0x10f0 fs/fs-writeback.c:2509
 process_one_work kernel/workqueue.c:3495 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
INFO: task jbd2/sda1-8:4941 blocked in I/O wait for more than 143 seconds.
      Tainted: G             L       syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jbd2/sda1-8     state:D stack:25288 pid:4941  tgid:4941  ppid:2      task_flags:0x240040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5583 [inline]
 __schedule+0x17dd/0x5820 kernel/sched/core.c:7382
 __schedule_loop kernel/sched/core.c:7459 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7474
 io_schedule+0x7f/0xd0 kernel/sched/core.c:8146
 bit_wait_io+0x13/0x110 kernel/sched/wait_bit.c:258
 __wait_on_bit+0xac/0x300 kernel/sched/wait_bit.c:52
 out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
 wait_on_buffer include/linux/buffer_head.h:476 [inline]
 jbd2_journal_commit_transaction+0x2f6e/0x5c80 fs/jbd2/commit.c:834
 kjournald2+0x3bc/0x740 fs/jbd2/journal.c:200
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
INFO: task syz-executor:5599 blocked in I/O wait for more than 143 seconds.
      Tainted: G             L       syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:22088 pid:5599  tgid:5599  ppid:5598   task_flags:0x440100 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5583 [inline]
 __schedule+0x17dd/0x5820 kernel/sched/core.c:7382
 __schedule_loop kernel/sched/core.c:7459 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7474
 io_schedule+0x7f/0xd0 kernel/sched/core.c:8146
 bit_wait_io+0x13/0x110 kernel/sched/wait_bit.c:258
 __wait_on_bit+0xac/0x300 kernel/sched/wait_bit.c:52
 out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
 wait_on_bit_io include/linux/wait_bit.h:106 [inline]
 do_get_write_access+0x658/0x10c0 fs/jbd2/transaction.c:1113
 jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263
 __ext4_journal_get_write_access+0xec/0x620 fs/ext4/ext4_jbd2.c:253
 ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:7445
 __ext4_mark_inode_dirty+0x141/0x7e0 fs/ext4/inode.c:7636
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:7673
 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2741
 generic_update_time fs/inode.c:2253 [inline]
 file_update_time_flags+0x399/0x440 fs/inode.c:2483
 ext4_page_mkwrite+0x21f/0x1470 fs/ext4/inode.c:7858
 do_page_mkwrite+0x147/0x310 mm/memory.c:3878
 wp_page_shared mm/memory.c:4279 [inline]
 do_wp_page+0x1a85/0x4b60 mm/memory.c:4502
 handle_pte_fault mm/memory.c:6672 [inline]
 __handle_mm_fault mm/memory.c:6797 [inline]
 handle_mm_fault+0x15c1/0x3540 mm/memory.c:6964
 do_user_addr_fault+0xb35/0x1480 arch/x86/mm/fault.c:1343
 handle_page_fault arch/x86/mm/fault.c:1483 [inline]
 exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7f1c5147dae2
RSP: 002b:00007ffd8ff08de0 EFLAGS: 00010202
RAX: 00007f1c4f5b8000 RBX: 0000555559e17d10 RCX: 0000000000000004
RDX: 0000000000000390 RSI: 0000555559e7d028 RDI: 0000000000000010
RBP: 00007ffd8ff092e0 R08: 0000555559e7d508 R09: 00000000000000a3
R10: 0000000000008000 R11: 0000000000000001 R12: 00007ffd8ff09120
R13: 00007ffd8ff08f10 R14: 585858582e7a7973 R15: 00007ffd8ff08e60
 </TASK>
INFO: task syz.2.1562:10532 blocked in I/O wait for more than 143 seconds.
      Tainted: G             L       syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.1562      state:D stack:25576 pid:10532 tgid:10532 ppid:5615   task_flags:0x440040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5583 [inline]
 __schedule+0x17dd/0x5820 kernel/sched/core.c:7382
 __schedule_loop kernel/sched/core.c:7459 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7474
 io_schedule+0x7f/0xd0 kernel/sched/core.c:8146
 bit_wait_io+0x13/0x110 kernel/sched/wait_bit.c:258
 __wait_on_bit+0xac/0x300 kernel/sched/wait_bit.c:52
 out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
 wait_on_bit_io include/linux/wait_bit.h:106 [inline]
 do_get_write_access+0x658/0x10c0 fs/jbd2/transaction.c:1113
 jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263
 __ext4_journal_get_write_access+0xec/0x620 fs/ext4/ext4_jbd2.c:253
 ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:7445
 __ext4_mark_inode_dirty+0x141/0x7e0 fs/ext4/inode.c:7636
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:7673
 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2741
 generic_update_time fs/inode.c:2253 [inline]
 file_update_time_flags+0x399/0x440 fs/inode.c:2483
 ext4_page_mkwrite+0x21f/0x1470 fs/ext4/inode.c:7858
 do_page_mkwrite+0x147/0x310 mm/memory.c:3878
 do_shared_fault mm/memory.c:6171 [inline]
 do_fault mm/memory.c:6233 [inline]
 do_pte_missing+0x70f/0x3570 mm/memory.c:4762
 handle_pte_fault mm/memory.c:6648 [inline]
 __handle_mm_fault mm/memory.c:6797 [inline]
 handle_mm_fault+0x1a2a/0x3540 mm/memory.c:6964
 do_user_addr_fault+0xb35/0x1480 arch/x86/mm/fault.c:1343
 handle_page_fault arch/x86/mm/fault.c:1483 [inline]
 exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7f8661473c09
RSP: 002b:00007ffe95a1b7a0 EFLAGS: 00010202
RAX: 0000001b33c24000 RBX: 0000000000000000 RCX: 00000000003ffde8
RDX: 0000001b33c23ffc RSI: 00000000003ffde8 RDI: 00007f8662355700
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007f8661812000
R10: 00007f8662355700 R11: 0000000000000000 R12: 0000000000000000
R13: 000000000000d268 R14: ffffffff816db810 R15: 00007f8662355720
 </TASK>
INFO: task syz.3.1571:10550 blocked in I/O wait for more than 143 seconds.
      Tainted: G             L       syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.1571      state:D stack:24552 pid:10550 tgid:10550 ppid:5616   task_flags:0x440040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5583 [inline]
 __schedule+0x17dd/0x5820 kernel/sched/core.c:7382
 __schedule_loop kernel/sched/core.c:7459 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7474
 io_schedule+0x7f/0xd0 kernel/sched/core.c:8146
 bit_wait_io+0x13/0x110 kernel/sched/wait_bit.c:258
 __wait_on_bit+0xac/0x300 kernel/sched/wait_bit.c:52
 out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
 wait_on_bit_io include/linux/wait_bit.h:106 [inline]
 do_get_write_access+0x658/0x10c0 fs/jbd2/transaction.c:1113
 jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263
 __ext4_journal_get_write_access+0xec/0x620 fs/ext4/ext4_jbd2.c:253
 ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:7445
 __ext4_mark_inode_dirty+0x141/0x7e0 fs/ext4/inode.c:7636
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:7673
 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2741
 generic_update_time fs/inode.c:2253 [inline]
 file_update_time_flags+0x399/0x440 fs/inode.c:2483
 ext4_page_mkwrite+0x21f/0x1470 fs/ext4/inode.c:7858
 do_page_mkwrite+0x147/0x310 mm/memory.c:3878
 do_shared_fault mm/memory.c:6171 [inline]
 do_fault mm/memory.c:6233 [inline]
 do_pte_missing+0x70f/0x3570 mm/memory.c:4762
 handle_pte_fault mm/memory.c:6648 [inline]
 __handle_mm_fault mm/memory.c:6797 [inline]
 handle_mm_fault+0x1a2a/0x3540 mm/memory.c:6964
 do_user_addr_fault+0xb35/0x1480 arch/x86/mm/fault.c:1343
 handle_page_fault arch/x86/mm/fault.c:1483 [inline]
 exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7fb7dd073ba9
RSP: 002b:00007ffee53a9590 EFLAGS: 00010202
RAX: 0000001b33f22000 RBX: ffffffff8bf6b599 RCX: 0000001b33f21ff8
RDX: 0000001b3392421c RSI: 0000000000000008 RDI: 00007fb7ddf55720
RBP: 000000000000017d R08: 00007fb7dd410000 R09: 00007fb7dd412000
R10: 000000008bf6b59d R11: 0000000000000003 R12: 00007fb7dd426038
R13: 000000000000027b R14: ffffffff8bf6bded R15: 00007fb7ddf55720
 </TASK>
INFO: task syz.1.1570:10553 blocked in I/O wait for more than 143 seconds.
      Tainted: G             L       syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.1570      state:D stack:25576 pid:10553 tgid:10553 ppid:5617   task_flags:0x440040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5583 [inline]
 __schedule+0x17dd/0x5820 kernel/sched/core.c:7382
 __schedule_loop kernel/sched/core.c:7459 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7474
 io_schedule+0x7f/0xd0 kernel/sched/core.c:8146
 bit_wait_io+0x13/0x110 kernel/sched/wait_bit.c:258
 __wait_on_bit+0xac/0x300 kernel/sched/wait_bit.c:52
 out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
 wait_on_bit_io include/linux/wait_bit.h:106 [inline]
 do_get_write_access+0x658/0x10c0 fs/jbd2/transaction.c:1113
 jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263
 __ext4_journal_get_write_access+0xec/0x620 fs/ext4/ext4_jbd2.c:253
 ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:7445
 __ext4_mark_inode_dirty+0x141/0x7e0 fs/ext4/inode.c:7636
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:7673
 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2741
 generic_update_time fs/inode.c:2253 [inline]
 file_update_time_flags+0x399/0x440 fs/inode.c:2483
 ext4_page_mkwrite+0x21f/0x1470 fs/ext4/inode.c:7858
 do_page_mkwrite+0x147/0x310 mm/memory.c:3878
 do_shared_fault mm/memory.c:6171 [inline]
 do_fault mm/memory.c:6233 [inline]
 do_pte_missing+0x70f/0x3570 mm/memory.c:4762
 handle_pte_fault mm/memory.c:6648 [inline]
 __handle_mm_fault mm/memory.c:6797 [inline]
 handle_mm_fault+0x1a2a/0x3540 mm/memory.c:6964
 do_user_addr_fault+0xb35/0x1480 arch/x86/mm/fault.c:1343
 handle_page_fault arch/x86/mm/fault.c:1483 [inline]
 exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7f8f11673ba9
RSP: 002b:00007ffdca6fb5e0 EFLAGS: 00010202
RAX: 0000001b33d24000 RBX: ffffffff817970f2 RCX: 0000001b33d23ff8
RDX: 00000000005ffde8 RSI: 00000000005ffde8 RDI: 00007f8f12555700
RBP: 0000000000000001 R08: 0000000000000000 R09: 00007f8f11a12000
R10: 00007f8f12555700 R11: 0000000000000000 R12: 00007f8f11a26038
R13: 0000000000000000 R14: ffffffff81797998 R15: 00007f8f12555720
 </TASK>
INFO: task syz.0.1573:10555 blocked in I/O wait for more than 143 seconds.
      Tainted: G             L       syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.1573      state:D stack:26696 pid:10555 tgid:10555 ppid:5619   task_flags:0x440040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5583 [inline]
 __schedule+0x17dd/0x5820 kernel/sched/core.c:7382
 __schedule_loop kernel/sched/core.c:7459 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7474
 io_schedule+0x7f/0xd0 kernel/sched/core.c:8146
 bit_wait_io+0x13/0x110 kernel/sched/wait_bit.c:258
 __wait_on_bit+0xac/0x300 kernel/sched/wait_bit.c:52
 out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
 wait_on_bit_io include/linux/wait_bit.h:106 [inline]
 do_get_write_access+0x658/0x10c0 fs/jbd2/transaction.c:1113
 jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263
 __ext4_journal_get_write_access+0xec/0x620 fs/ext4/ext4_jbd2.c:253
 ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:7445
 __ext4_mark_inode_dirty+0x141/0x7e0 fs/ext4/inode.c:7636
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:7673
 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2741
 generic_update_time fs/inode.c:2253 [inline]
 touch_atime+0x568/0x670 fs/inode.c:2328
 file_accessed include/linux/fs.h:2281 [inline]
 ext4_file_mmap_prepare+0x277/0x450 fs/ext4/file.c:919
 vfs_mmap_prepare include/linux/fs.h:2073 [inline]
 call_mmap_prepare mm/vma.c:2916 [inline]
 __mmap_region mm/vma.c:3033 [inline]
 mmap_region+0xef9/0x2840 mm/vma.c:3131
 do_mmap+0xe0a/0x1300 mm/mmap.c:573
 vm_mmap_pgoff+0x27a/0x520 mm/util.c:581
 ksys_mmap_pgoff+0x4dc/0x760 mm/mmap.c:619
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f50d7d9f2c2
RSP: 002b:00007fff817bb5c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000001b33664000 RCX: 00007f50d7d9f2c2
RDX: 0000000000000003 RSI: 00000000005c0000 RDI: 0000001b33664000
RBP: 0000000000100001 R08: 0000000000000004 R09: 0000000000040000
R10: 0000000000100001 R11: 0000000000000206 R12: 0000000000000136
R13: 00000000000927c0 R14: 000000000004f500 R15: 00007fff817bb8a0
 </TASK>
INFO: task syz.4.1574:10556 blocked in I/O wait for more than 143 seconds.
      Tainted: G             L       syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.1574      state:D stack:25208 pid:10556 tgid:10556 ppid:5618   task_flags:0x440040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5583 [inline]
 __schedule+0x17dd/0x5820 kernel/sched/core.c:7382
 __schedule_loop kernel/sched/core.c:7459 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7474
 io_schedule+0x7f/0xd0 kernel/sched/core.c:8146
 bit_wait_io+0x13/0x110 kernel/sched/wait_bit.c:258
 __wait_on_bit+0xac/0x300 kernel/sched/wait_bit.c:52
 out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
 wait_on_bit_io include/linux/wait_bit.h:106 [inline]
 do_get_write_access+0x658/0x10c0 fs/jbd2/transaction.c:1113
 jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263
 __ext4_journal_get_write_access+0xec/0x620 fs/ext4/ext4_jbd2.c:253
 ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:7445
 __ext4_mark_inode_dirty+0x141/0x7e0 fs/ext4/inode.c:7636
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:7673
 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2741
 generic_update_time fs/inode.c:2253 [inline]
 touch_atime+0x568/0x670 fs/inode.c:2328
 file_accessed include/linux/fs.h:2281 [inline]
 ext4_file_mmap_prepare+0x277/0x450 fs/ext4/file.c:919
 vfs_mmap_prepare include/linux/fs.h:2073 [inline]
 call_mmap_prepare mm/vma.c:2916 [inline]
 __mmap_region mm/vma.c:3033 [inline]
 mmap_region+0xef9/0x2840 mm/vma.c:3131
 do_mmap+0xe0a/0x1300 mm/mmap.c:573
 vm_mmap_pgoff+0x27a/0x520 mm/util.c:581
 ksys_mmap_pgoff+0x4dc/0x760 mm/mmap.c:619
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb70839f2c2
RSP: 002b:00007ffef89fc5a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000001b33a64000 RCX: 00007fb70839f2c2
RDX: 0000000000000003 RSI: 00000000005c0000 RDI: 0000001b33a64000
RBP: 0000000000100001 R08: 0000000000000004 R09: 0000000000040000
R10: 0000000000100001 R11: 0000000000000206 R12: 0000000000000137
R13: 00000000000927c0 R14: 000000000004f52d R15: 00007ffef89fc880
 </TASK>

Showing all locks held in the system:
locks held by kworker/u8:2/33: 4, on CPU#0:
 #0: ffff888021abc148 ((wq_completion)writeback){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #0: ffff888021abc148 ((wq_completion)writeback){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffff888021abc148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
 #0: ffff888021abc148 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
 #1: ffffc90000a97c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #1: ffffc90000a97c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #1: ffffc90000a97c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
 #1: ffffc90000a97c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
 #2: ffff888034e0a0e8 (&type->s_umount_key#34){++++}-{4:4}, at: super_trylock_shared+0x23/0xf0 fs/super.c:670
 #3: ffff888034daccd8 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages+0x1f1/0x4e0 fs/ext4/inode.c:3170
locks held by pr/ttyS0/34: 2, last CPU#1:
 #0: ffffffff8fc33f58 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:314 [inline]
 #0: ffffffff8fc33f58 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:493 [inline]
 #0: ffffffff8fc33f58 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x30/0x60 kernel/printk/printk.c:291
 #1: ffffffff9bd9f6b8 (&port_lock_key){-...}-{3:3}, at: __uart_port_lock_irqsave include/linux/serial_core.h:613 [inline]
 #1: ffffffff9bd9f6b8 (&port_lock_key){-...}-{3:3}, at: univ8250_console_device_lock+0x67/0xc0 drivers/tty/serial/8250/8250_core.c:413
locks held by khungtaskd/35: 1, last CPU#0:
 #0: ffffffff8fd5a4a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #0: ffffffff8fd5a4a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8fd5a4a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6871
locks held by getty/5372: 2, on CPU#1:
 #0: ffff888036cfd0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900032362e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360 drivers/tty/n_tty.c:2211
locks held by syz-executor/5599: 3, on CPU#0:
 #0: ffff8880740736c8 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:337
 #1: ffff888034e0a558 (sb_pagefaults){++++}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
 #1: ffff888034e0a558 (sb_pagefaults){++++}-{0:0}, at: ext4_page_mkwrite+0x1fe/0x1470 fs/ext4/inode.c:7857
 #2: ffff888034e08950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
locks held by syz.2.1562/10532: 3, on CPU#0:
 #0: ffff88807df641c8 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:337
 #1: ffff888034e0a558 (sb_pagefaults){++++}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
 #1: ffff888034e0a558 (sb_pagefaults){++++}-{0:0}, at: ext4_page_mkwrite+0x1fe/0x1470 fs/ext4/inode.c:7857
 #2: ffff888034e08950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
locks held by syz.3.1571/10550: 3, on CPU#0:
 #0: ffff88807aff3a88 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:337
 #1: ffff888034e0a558 (sb_pagefaults){++++}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
 #1: ffff888034e0a558 (sb_pagefaults){++++}-{0:0}, at: ext4_page_mkwrite+0x1fe/0x1470 fs/ext4/inode.c:7857
 #2: ffff888034e08950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
locks held by syz.1.1570/10553: 3, on CPU#1:
 #0: ffff88807dab2808 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:337
 #1: ffff888034e0a558 (sb_pagefaults){++++}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
 #1: ffff888034e0a558 (sb_pagefaults){++++}-{0:0}, at: ext4_page_mkwrite+0x1fe/0x1470 fs/ext4/inode.c:7857
 #2: ffff888034e08950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
locks held by syz.0.1573/10555: 3, on CPU#0:
 #0: ffff88802a3d0340 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:550 [inline]
 #0: ffff88802a3d0340 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x1ed/0x520 mm/util.c:579
 #1: ffff888034e0a460 (sb_writers#4){++++}-{0:0}, at: file_accessed include/linux/fs.h:2281 [inline]
 #1: ffff888034e0a460 (sb_writers#4){++++}-{0:0}, at: ext4_file_mmap_prepare+0x277/0x450 fs/ext4/file.c:919
 #2: ffff888034e08950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
locks held by syz.4.1574/10556: 3, on CPU#1:
 #0: ffff88807fd74080 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:550 [inline]
 #0: ffff88807fd74080 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x1ed/0x520 mm/util.c:579
 #1: ffff888034e0a460 (sb_writers#4){++++}-{0:0}, at: file_accessed include/linux/fs.h:2281 [inline]
 #1: ffff888034e0a460 (sb_writers#4){++++}-{0:0}, at: ext4_file_mmap_prepare+0x277/0x450 fs/ext4/file.c:919
 #2: ffff888034e08950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 35 Comm: khungtaskd Tainted: G             L       syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:123
 nmi_trigger_cpumask_backtrace+0x17d/0x390 lib/nmi_backtrace.c:66
 trigger_all_cpu_backtrace include/linux/nmi.h:164 [inline]
 __sys_info lib/sys_info.c:157 [inline]
 sys_info+0x135/0x170 lib/sys_info.c:165
 check_hung_uninterruptible_tasks kernel/hung_task.c:377 [inline]
 watchdog+0x1073/0x10f0 kernel/hung_task.c:598
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: pr/ttyS0 Tainted: G             L       syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:io_serial_in+0x77/0xc0 drivers/tty/serial/8250/8250_port.c:425
Code: e8 8e 83 45 fc 44 89 f9 d3 e3 49 83 c6 40 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 0f fb bb fc 41 03 1e 89 da ec <0f> b6 c0 5b 41 5c 41 5e 41 5f e9 9a b5 78 06 cc 44 89 f9 80 e1 07
RSP: 0018:ffffc90000aa78b8 EFLAGS: 00000002
RAX: 1ffffffff37b3e00 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: 0000000000000000 RDI: 0000000000000020
RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: ffffffff85836340 R12: dffffc0000000000
R13: 0000000000000000 R14: ffffffff9bd9f6e0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888123b6f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b34097c660 CR3: 000000000fb48000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 serial_in drivers/tty/serial/8250/8250.h:134 [inline]
 serial_lsr_in drivers/tty/serial/8250/8250.h:156 [inline]
 wait_for_lsr+0x184/0x2f0 drivers/tty/serial/8250/8250_port.c:2036
 serial8250_fifo_wait_for_lsr_thre drivers/tty/serial/8250/8250_port.c:3294 [inline]
 __serial8250_console_fifo_write+0xcd/0x3e0 drivers/tty/serial/8250/8250_port.c:3369
 serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3402 [inline]
 __serial8250_console_write drivers/tty/serial/8250/8250_port.c:3456 [inline]
 serial8250_console_write+0xa7e/0x1200 drivers/tty/serial/8250/8250_port.c:3520
 nbcon_emit_next_record+0xef5/0x1a90 kernel/printk/nbcon.c:-1
 nbcon_emit_one kernel/printk/nbcon.c:1157 [inline]
 nbcon_kthread_func+0x6d9/0x8d0 kernel/printk/nbcon.c:1271
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>