INFO: task kworker/u8:14:4421 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:kworker/u8:14   state:D stack:20520 pid:4421  tgid:4421  ppid:2      task_flags:0x4248060 flags:0x00080000
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x1b2a/0x59a0 kernel/sched/core.c:7232
 __schedule_loop kernel/sched/core.c:7309 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7324
 io_schedule+0x7f/0xd0 kernel/sched/core.c:8152
 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:3032 [inline]
 blk_mq_submit_bio+0x1522/0x2a40 block/blk-mq.c:3170
 __submit_bio_noacct_mq block/blk-core.c:756 [inline]
 submit_bio_noacct_nocheck+0x2f4/0xa40 block/blk-core.c:790
 blk_crypto_submit_bio include/linux/blk-crypto.h:212 [inline]
 ext4_io_submit fs/ext4/page-io.c:396 [inline]
 io_submit_add_bh fs/ext4/page-io.c:452 [inline]
 ext4_bio_write_folio+0xf90/0x1780 fs/ext4/page-io.c:547
 mpage_process_page_bufs+0x6bd/0x8a0 fs/ext4/inode.c:2201
 mpage_prepare_extent_to_map+0xf92/0x1890 fs/ext4/inode.c:2743
 ext4_do_writepages+0xb8a/0x4770 fs/ext4/inode.c:2884
 ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3032
 do_writepages+0x338/0x560 mm/page-writeback.c:2560
 __writeback_single_inode+0x136/0x1220 fs/fs-writeback.c:1788
 writeback_sb_inodes+0x9de/0x1b00 fs/fs-writeback.c:2099
 __writeback_inodes_wb+0x114/0x240 fs/fs-writeback.c:2175
 wb_writeback+0x42f/0xad0 fs/fs-writeback.c:2286
 wb_check_old_data_flush fs/fs-writeback.c:2390 [inline]
 wb_do_writeback fs/fs-writeback.c:2469 [inline]
 wb_workfn+0xc92/0x10f0 fs/fs-writeback.c:2497
 process_one_work kernel/workqueue.c:3375 [inline]
 process_scheduled_works+0xc4e/0x1630 kernel/workqueue.c:3458
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3539
 kthread+0x388/0x470 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/sda1-8:4951 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:25008 pid:4951  tgid:4951  ppid:2      task_flags:0x240040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x1b2a/0x59a0 kernel/sched/core.c:7232
 __schedule_loop kernel/sched/core.c:7309 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7324
 io_schedule+0x7f/0xd0 kernel/sched/core.c:8152
 bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:250
 __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:418 [inline]
 jbd2_journal_commit_transaction+0x2f1d/0x5b70 fs/jbd2/commit.c:834
 kjournald2+0x3bc/0x750 fs/jbd2/journal.c:200
 kthread+0x388/0x470 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:5606 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:22408 pid:5606  tgid:5606  ppid:5605   task_flags:0x440100 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x1b2a/0x59a0 kernel/sched/core.c:7232
 __schedule_loop kernel/sched/core.c:7309 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7324
 io_schedule+0x7f/0xd0 kernel/sched/core.c:8152
 bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:250
 __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:105 [inline]
 do_get_write_access+0x662/0x1070 fs/jbd2/transaction.c:1113
 jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263
 __ext4_journal_get_write_access+0xf1/0x620 fs/ext4/ext4_jbd2.c:249
 ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:6509
 __ext4_mark_inode_dirty+0x146/0x7b0 fs/ext4/inode.c:6694
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6731
 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2729
 generic_update_time fs/inode.c:2254 [inline]
 file_update_time_flags+0x399/0x440 fs/inode.c:2484
 ext4_page_mkwrite+0x224/0x1140 fs/ext4/inode.c:6897
 do_page_mkwrite+0x147/0x310 mm/memory.c:3816
 wp_page_shared mm/memory.c:4217 [inline]
 do_wp_page+0x1a9c/0x4b80 mm/memory.c:4440
 handle_pte_fault mm/memory.c:6583 [inline]
 __handle_mm_fault mm/memory.c:6708 [inline]
 handle_mm_fault+0x15d7/0x3750 mm/memory.c:6877
 do_user_addr_fault+0xa4d/0x1340 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: 0033:0x7fd949e7c662
RSP: 002b:00007fff90a9c0b0 EFLAGS: 00010202
RAX: 00007fd948004000 RBX: 0000555558b78540 RCX: 0000000000000003
RDX: 0000000000000039 RSI: 0000555558be56a8 RDI: 0000000000000008
RBP: 00007fff90a9c5b0 R08: 0000555558be5780 R09: 00000000000000a1
R10: 0000000000000000 R11: 0000000000000202 R12: 00007fff90a9c3f0
R13: 00007fff90a9c1e0 R14: 585858582e7a7973 R15: 00007fff90a9c130
 </TASK>
INFO: task syz.9.5451:20753 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.9.5451      state:D stack:25608 pid:20753 tgid:20753 ppid:18813  task_flags:0x440040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x1b2a/0x59a0 kernel/sched/core.c:7232
 __schedule_loop kernel/sched/core.c:7309 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7324
 io_schedule+0x7f/0xd0 kernel/sched/core.c:8152
 bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:250
 __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:105 [inline]
 do_get_write_access+0x662/0x1070 fs/jbd2/transaction.c:1113
 jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263
 __ext4_journal_get_write_access+0xf1/0x620 fs/ext4/ext4_jbd2.c:249
 ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:6509
 __ext4_mark_inode_dirty+0x146/0x7b0 fs/ext4/inode.c:6694
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6731
 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2729
 generic_update_time fs/inode.c:2254 [inline]
 file_update_time_flags+0x399/0x440 fs/inode.c:2484
 ext4_page_mkwrite+0x224/0x1140 fs/ext4/inode.c:6897
 do_page_mkwrite+0x147/0x310 mm/memory.c:3816
 do_shared_fault mm/memory.c:6077 [inline]
 do_fault mm/memory.c:6139 [inline]
 do_pte_missing+0x757/0x34b0 mm/memory.c:4700
 handle_pte_fault mm/memory.c:6559 [inline]
 __handle_mm_fault mm/memory.c:6708 [inline]
 handle_mm_fault+0x1a53/0x3750 mm/memory.c:6877
 do_user_addr_fault+0xa4d/0x1340 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: 0033:0x7f0c2f272eb2
RSP: 002b:00007ffdc96d0000 EFLAGS: 00010202
RAX: 000000000000a008 RBX: 00007f0c30155720 RCX: 0000000000000000
RDX: 0000001b33f1a000 RSI: 0000000000000008 RDI: 00007f0c30155720
RBP: 0000000000000237 R08: 00007f0c2f610000 R09: 00007f0c2f626128
R10: 0000000000000001 R11: 0000000000000002 R12: ffffffff820b96a0
R13: 00007f0c2f626128 R14: 00000000000001ba R15: ffffffffffff6000
 </TASK>
INFO: task syz.8.5459:20770 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.8.5459      state:D stack:25608 pid:20770 tgid:20770 ppid:15749  task_flags:0x440040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x1b2a/0x59a0 kernel/sched/core.c:7232
 __schedule_loop kernel/sched/core.c:7309 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7324
 io_schedule+0x7f/0xd0 kernel/sched/core.c:8152
 bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:250
 __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:105 [inline]
 do_get_write_access+0x662/0x1070 fs/jbd2/transaction.c:1113
 jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263
 __ext4_journal_get_write_access+0xf1/0x620 fs/ext4/ext4_jbd2.c:249
 ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:6509
 __ext4_mark_inode_dirty+0x146/0x7b0 fs/ext4/inode.c:6694
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6731
 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2729
 generic_update_time fs/inode.c:2254 [inline]
 file_update_time_flags+0x399/0x440 fs/inode.c:2484
 ext4_page_mkwrite+0x224/0x1140 fs/ext4/inode.c:6897
 do_page_mkwrite+0x147/0x310 mm/memory.c:3816
 do_shared_fault mm/memory.c:6077 [inline]
 do_fault mm/memory.c:6139 [inline]
 do_pte_missing+0x757/0x34b0 mm/memory.c:4700
 handle_pte_fault mm/memory.c:6559 [inline]
 __handle_mm_fault mm/memory.c:6708 [inline]
 handle_mm_fault+0x1a53/0x3750 mm/memory.c:6877
 do_user_addr_fault+0xa4d/0x1340 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: 0033:0x7f940a072729
RSP: 002b:00007fff3c102260 EFLAGS: 00010202
RAX: 0000001b34d24000 RBX: ffffffff825498ba RCX: 0000001b34d23ff8
RDX: 00000000005ffde8 RSI: 00000000005ffde8 RDI: 00007f940af55700
RBP: 0000000000000001 R08: 0000000000000000 R09: 00007f940a412000
R10: 00007f940af55700 R11: 0000000000000000 R12: 00007f940a426038
R13: 0000000000000000 R14: ffffffff825491d0 R15: 00007f940af55720
 </TASK>
INFO: task syz.3.5460:20772 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.3.5460      state:D stack:25608 pid:20772 tgid:20772 ppid:5621   task_flags:0x440040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x1b2a/0x59a0 kernel/sched/core.c:7232
 __schedule_loop kernel/sched/core.c:7309 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7324
 io_schedule+0x7f/0xd0 kernel/sched/core.c:8152
 bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:250
 __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:105 [inline]
 do_get_write_access+0x662/0x1070 fs/jbd2/transaction.c:1113
 jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263
 __ext4_journal_get_write_access+0xf1/0x620 fs/ext4/ext4_jbd2.c:249
 ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:6509
 __ext4_mark_inode_dirty+0x146/0x7b0 fs/ext4/inode.c:6694
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6731
 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2729
 generic_update_time fs/inode.c:2254 [inline]
 file_update_time_flags+0x399/0x440 fs/inode.c:2484
 ext4_page_mkwrite+0x224/0x1140 fs/ext4/inode.c:6897
 do_page_mkwrite+0x147/0x310 mm/memory.c:3816
 do_shared_fault mm/memory.c:6077 [inline]
 do_fault mm/memory.c:6139 [inline]
 do_pte_missing+0x757/0x34b0 mm/memory.c:4700
 handle_pte_fault mm/memory.c:6559 [inline]
 __handle_mm_fault mm/memory.c:6708 [inline]
 handle_mm_fault+0x1a53/0x3750 mm/memory.c:6877
 do_user_addr_fault+0xa4d/0x1340 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: 0033:0x7fcddc672789
RSP: 002b:00007ffdfc519190 EFLAGS: 00010202
RAX: 0000001b34024000 RBX: 0000000000000000 RCX: 00000000005ffde8
RDX: 0000001b34023ffc RSI: 00000000005ffde8 RDI: 00007fcddd555700
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fcddca12000
R10: 00007fcddd555700 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000009503 R14: ffffffff816d4aae R15: 00007fcddd555720
 </TASK>
INFO: task syz.4.5462:20780 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.4.5462      state:D stack:26088 pid:20780 tgid:20780 ppid:19675  task_flags:0x440040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x1b2a/0x59a0 kernel/sched/core.c:7232
 __schedule_loop kernel/sched/core.c:7309 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7324
 io_schedule+0x7f/0xd0 kernel/sched/core.c:8152
 bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:250
 __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:105 [inline]
 do_get_write_access+0x662/0x1070 fs/jbd2/transaction.c:1113
 jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263
 __ext4_journal_get_write_access+0xf1/0x620 fs/ext4/ext4_jbd2.c:249
 ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:6509
 __ext4_mark_inode_dirty+0x146/0x7b0 fs/ext4/inode.c:6694
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6731
 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2729
 generic_update_time fs/inode.c:2254 [inline]
 file_update_time_flags+0x399/0x440 fs/inode.c:2484
 ext4_page_mkwrite+0x224/0x1140 fs/ext4/inode.c:6897
 do_page_mkwrite+0x147/0x310 mm/memory.c:3816
 do_shared_fault mm/memory.c:6077 [inline]
 do_fault mm/memory.c:6139 [inline]
 do_pte_missing+0x757/0x34b0 mm/memory.c:4700
 handle_pte_fault mm/memory.c:6559 [inline]
 __handle_mm_fault mm/memory.c:6708 [inline]
 handle_mm_fault+0x1a53/0x3750 mm/memory.c:6877
 do_user_addr_fault+0xa4d/0x1340 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: 0033:0x7fc16226ba23
RSP: 002b:00007ffcd15c5ac0 EFLAGS: 00010246
RAX: 00000000005ffde8 RBX: 0000000000000000 RCX: 0000001b32064000
RDX: 0000001b32024000 RSI: 0000000000600000 RDI: 00007fc1625e0708
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffcd15c5d50
 </TASK>
INFO: task syz.1.5463:20783 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.1.5463      state:D stack:27256 pid:20783 tgid:20783 ppid:5624   task_flags:0x440040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x1b2a/0x59a0 kernel/sched/core.c:7232
 __schedule_loop kernel/sched/core.c:7309 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7324
 io_schedule+0x7f/0xd0 kernel/sched/core.c:8152
 bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:250
 __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:105 [inline]
 do_get_write_access+0x662/0x1070 fs/jbd2/transaction.c:1113
 jbd2_journal_get_write_access+0x1d7/0x230 fs/jbd2/transaction.c:1263
 __ext4_journal_get_write_access+0xf1/0x620 fs/ext4/ext4_jbd2.c:249
 ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:6509
 __ext4_mark_inode_dirty+0x146/0x7b0 fs/ext4/inode.c:6694
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6731
 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2729
 generic_update_time fs/inode.c:2254 [inline]
 touch_atime+0x565/0x670 fs/inode.c:2329
 file_accessed include/linux/fs.h:2278 [inline]
 ext4_file_mmap_prepare+0x277/0x450 fs/ext4/file.c:901
 vfs_mmap_prepare include/linux/fs.h:2070 [inline]
 call_mmap_prepare mm/vma.c:2805 [inline]
 __mmap_region mm/vma.c:2901 [inline]
 mmap_region+0xe8b/0x2460 mm/vma.c:3002
 do_mmap+0xe0a/0x1300 mm/mmap.c:573
 vm_mmap_pgoff+0x272/0x4e0 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+0x166/0x510 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f45e179de42
RSP: 002b:00007ffe479bc8f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000001b33864000 RCX: 00007f45e179de42
RDX: 0000000000000003 RSI: 00000000005c0000 RDI: 0000001b33864000
RBP: 0000000000100001 R08: 0000000000000004 R09: 0000000000040000
R10: 0000000000100001 R11: 0000000000000206 R12: 0000000000000489
R13: 00000000000927c0 R14: 00000000000bd76f R15: 00007ffe479bcbd0
 </TASK>

Showing all locks held in the system:
locks held by pr/ttyS0/16: 2, last CPU#1:
 #0: ffffffff8ea36278 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:314 [inline]
 #0: ffffffff8ea36278 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:439 [inline]
 #0: ffffffff8ea36278 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x30/0x60 kernel/printk/printk.c:291
 #1: ffffffff9aafec18 (&port_lock_key){-.-.}-{3:3}, at: __uart_port_lock_irqsave include/linux/serial_core.h:613 [inline]
 #1: ffffffff9aafec18 (&port_lock_key){-.-.}-{3:3}, at: univ8250_console_device_lock+0x67/0xc0 drivers/tty/serial/8250/8250_core.c:413
locks held by khungtaskd/31: 1, last CPU#0:
 #0: ffffffff8eb5c6a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #0: ffffffff8eb5c6a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8eb5c6a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6837
locks held by kworker/u8:14/4421: 4, on CPU#1:
 #0: ffff88801fed2940 ((wq_completion)writeback){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #0: ffff88801fed2940 ((wq_completion)writeback){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffff88801fed2940 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3340 [inline]
 #0: ffff88801fed2940 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x97e/0x1630 kernel/workqueue.c:3458
 #1: ffffc9000e317c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #1: ffffc9000e317c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #1: ffffc9000e317c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3340 [inline]
 #1: ffffc9000e317c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x97e/0x1630 kernel/workqueue.c:3458
 #2: ffff88807fc180e8 (&type->s_umount_key#34){++++}-{4:4}, at: super_trylock_shared+0x23/0xf0 fs/super.c:688
 #3: ffff88807fc26c98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: percpu_down_read include/linux/percpu-rwsem.h:77 [inline]
 #3: ffff88807fc26c98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages_down_read fs/ext4/ext4.h:1887 [inline]
 #3: ffff88807fc26c98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages+0x205/0x3b0 fs/ext4/inode.c:3031
locks held by klogd/4978: 2, last CPU#0:
 #0: ffffffff8eca4af0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:198 [inline]
 #0: ffffffff8eca4af0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock+0x27/0x60 include/linux/srcu.h:305
 #1: ffffffff8eb5c6a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #1: ffffffff8eb5c6a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #1: ffffffff8eb5c6a0 (rcu_read_lock){....}-{1:3}, at: class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
 #1: ffffffff8eb5c6a0 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame+0x8f/0x2550 arch/x86/kernel/unwind_orc.c:495
locks held by syz-executor/5606: 3, on CPU#1:
 #0: ffff88807d3136c8 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:310
 #1: ffff88807fc18558 (sb_pagefaults){++++}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
 #1: ffff88807fc18558 (sb_pagefaults){++++}-{0:0}, at: __sb_start_write include/linux/fs/super.h:19 [inline]
 #1: ffff88807fc18558 (sb_pagefaults){++++}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
 #1: ffff88807fc18558 (sb_pagefaults){++++}-{0:0}, at: ext4_page_mkwrite+0x202/0x1140 fs/ext4/inode.c:6896
 #2: ffff88807fc24938 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fbf/0x2200 fs/jbd2/transaction.c:444
locks held by getty/11487: 2, on CPU#1:
 #0: ffff8880290ec0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000357b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360 drivers/tty/n_tty.c:2211
locks held by syz.9.5451/20753: 3, on CPU#1:
 #0: ffff888025b5f1c8 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:310
 #1: ffff88807fc18558 (sb_pagefaults){++++}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
 #1: ffff88807fc18558 (sb_pagefaults){++++}-{0:0}, at: __sb_start_write include/linux/fs/super.h:19 [inline]
 #1: ffff88807fc18558 (sb_pagefaults){++++}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
 #1: ffff88807fc18558 (sb_pagefaults){++++}-{0:0}, at: ext4_page_mkwrite+0x202/0x1140 fs/ext4/inode.c:6896
 #2: ffff88807fc24938 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fbf/0x2200 fs/jbd2/transaction.c:444
locks held by syz.8.5459/20770: 3, on CPU#1:
 #0: ffff888035688448 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:310
 #1: ffff88807fc18558 (sb_pagefaults){++++}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
 #1: ffff88807fc18558 (sb_pagefaults){++++}-{0:0}, at: __sb_start_write include/linux/fs/super.h:19 [inline]
 #1: ffff88807fc18558 (sb_pagefaults){++++}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
 #1: ffff88807fc18558 (sb_pagefaults){++++}-{0:0}, at: ext4_page_mkwrite+0x202/0x1140 fs/ext4/inode.c:6896
 #2: ffff88807fc24938 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fbf/0x2200 fs/jbd2/transaction.c:444
locks held by syz.3.5460/20772: 3, on CPU#1:
 #0: ffff88807f57ed08 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:310
 #1: ffff88807fc18558 (sb_pagefaults){++++}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
 #1: ffff88807fc18558 (sb_pagefaults){++++}-{0:0}, at: __sb_start_write include/linux/fs/super.h:19 [inline]
 #1: ffff88807fc18558 (sb_pagefaults){++++}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
 #1: ffff88807fc18558 (sb_pagefaults){++++}-{0:0}, at: ext4_page_mkwrite+0x202/0x1140 fs/ext4/inode.c:6896
 #2: ffff88807fc24938 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fbf/0x2200 fs/jbd2/transaction.c:444
locks held by syz.4.5462/20780: 3, on CPU#1:
 #0: ffff88806f81d588 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:310
 #1: ffff88807fc18558 (sb_pagefaults){++++}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
 #1: ffff88807fc18558 (sb_pagefaults){++++}-{0:0}, at: __sb_start_write include/linux/fs/super.h:19 [inline]
 #1: ffff88807fc18558 (sb_pagefaults){++++}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
 #1: ffff88807fc18558 (sb_pagefaults){++++}-{0:0}, at: ext4_page_mkwrite+0x202/0x1140 fs/ext4/inode.c:6896
 #2: ffff88807fc24938 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fbf/0x2200 fs/jbd2/transaction.c:444
locks held by syz.1.5463/20783: 3, on CPU#1:
 #0: ffff88807cd31d38 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:562 [inline]
 #0: ffff88807cd31d38 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x1dd/0x4e0 mm/util.c:579
 #1: ffff88807fc18460 (sb_writers#4){++++}-{0:0}, at: file_accessed include/linux/fs.h:2278 [inline]
 #1: ffff88807fc18460 (sb_writers#4){++++}-{0:0}, at: ext4_file_mmap_prepare+0x277/0x450 fs/ext4/file.c:901
 #2: ffff88807fc24938 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fbf/0x2200 fs/jbd2/transaction.c:444

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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+0x17a/0x380 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:353 [inline]
 watchdog+0xfd7/0x1030 kernel/hung_task.c:561
 kthread+0x388/0x470 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: 16 Comm: pr/ttyS0 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:io_serial_in+0x77/0xc0 drivers/tty/serial/8250/8250_port.c:409
Code: e8 fe 10 5b 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 9f d4 c9 fc 41 03 1e 89 da ec <0f> b6 c0 5b 41 5c 41 5e 41 5f c3 cc cc cc cc cc 44 89 f9 80 e1 07
RSP: 0018:ffffc900001578b8 EFLAGS: 00000002
RAX: 1ffffffff355fd00 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: 0000000000000000 RDI: 0000000000000020
RBP: dffffc0000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: ffffffff856c73b0 R12: dffffc0000000000
R13: 0000000000000000 R14: ffffffff9aafec40 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88812500c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005595e0b9e168 CR3: 0000000012384000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 serial_in drivers/tty/serial/8250/8250.h:128 [inline]
 serial_lsr_in drivers/tty/serial/8250/8250.h:150 [inline]
 wait_for_lsr+0x184/0x2f0 drivers/tty/serial/8250/8250_port.c:2013
 serial8250_fifo_wait_for_lsr_thre drivers/tty/serial/8250/8250_port.c:3270 [inline]
 __serial8250_console_fifo_write+0xcd/0x3e0 drivers/tty/serial/8250/8250_port.c:3345
 serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3378 [inline]
 __serial8250_console_write drivers/tty/serial/8250/8250_port.c:3429 [inline]
 serial8250_console_write+0xaa1/0x1200 drivers/tty/serial/8250/8250_port.c:3493
 nbcon_emit_next_record+0xef5/0x1a90 kernel/printk/nbcon.c:-1
 nbcon_emit_one kernel/printk/nbcon.c:1157 [inline]
 nbcon_kthread_func+0x679/0x880 kernel/printk/nbcon.c:1271
 kthread+0x388/0x470 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>