INFO: task kworker/u8:1:14 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/u8:1    state:D stack:20928 pid:14    tgid:14    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/0x5830 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:3056 [inline]
 blk_mq_submit_bio+0x18ae/0x2eb0 block/blk-mq.c:3205
 __submit_bio_noacct_mq block/blk-core.c:757 [inline]
 submit_bio_noacct_nocheck+0x2fe/0xb10 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:2562
 __writeback_single_inode+0x136/0x1220 fs/fs-writeback.c:1809
 writeback_sb_inodes+0x9de/0x1af0 fs/fs-writeback.c:2120
 __writeback_inodes_wb+0x114/0x250 fs/fs-writeback.c:2196
 wb_writeback+0x42f/0xad0 fs/fs-writeback.c:2307
 wb_check_old_data_flush fs/fs-writeback.c:2411 [inline]
 wb_do_writeback fs/fs-writeback.c:2490 [inline]
 wb_workfn+0xc92/0x10f0 fs/fs-writeback.c:2518
 process_one_work kernel/workqueue.c:3505 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3588
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3669
 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/sda1-8:4964 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:25280 pid:4964  tgid:4964  ppid:2      task_flags:0x240040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5583 [inline]
 __schedule+0x17dd/0x5830 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:5618 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:21992 pid:5618  tgid:5618  ppid:5617   task_flags:0x440100 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5583 [inline]
 __schedule+0x17dd/0x5830 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:7451
 __ext4_mark_inode_dirty+0x141/0x7e0 fs/ext4/inode.c:7642
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:7679
 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2751
 generic_update_time fs/inode.c:2264 [inline]
 file_update_time_flags+0x399/0x440 fs/inode.c:2494
 ext4_page_mkwrite+0x21f/0x1470 fs/ext4/inode.c:7864
 do_page_mkwrite+0x147/0x310 mm/memory.c:3856
 wp_page_shared mm/memory.c:4262 [inline]
 do_wp_page+0x1a77/0x4c30 mm/memory.c:4485
 handle_pte_fault mm/memory.c:6659 [inline]
 __handle_mm_fault mm/memory.c:6784 [inline]
 handle_mm_fault+0x19c9/0x2f80 mm/memory.c:6951
 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: 0033:0x00007f1084c71a63
RSP: 002b:00007fffd7ec1240 EFLAGS: 00010216
RAX: 00007f1081ff4a74 RBX: 00007fffd7ec1370 RCX: 0000000000000000
RDX: 00007f1081ff4a70 RSI: 0000000000000008 RDI: 00007fffd7ec1370
RBP: 00000000000003e6 R08: 0000000000000000 R09: 0000000000000000
R10: 00007fffd7ec1350 R11: 0000000000000000 R12: 0000000000000000
R13: 000000000000b58c R14: ffffffffffff4a74 R15: 0000000000000000
 </TASK>
INFO: task syz.3.1877:10543 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.3.1877      state:D stack:24680 pid:10543 tgid:10543 ppid:5633   task_flags:0x440040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5583 [inline]
 __schedule+0x17dd/0x5830 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:7451
 __ext4_mark_inode_dirty+0x141/0x7e0 fs/ext4/inode.c:7642
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:7679
 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2751
 generic_update_time fs/inode.c:2264 [inline]
 file_update_time_flags+0x399/0x440 fs/inode.c:2494
 ext4_page_mkwrite+0x21f/0x1470 fs/ext4/inode.c:7864
 do_page_mkwrite+0x147/0x310 mm/memory.c:3856
 do_shared_fault mm/memory.c:6155 [inline]
 do_fault mm/memory.c:6217 [inline]
 do_pte_missing+0x70f/0x3570 mm/memory.c:4745
 handle_pte_fault mm/memory.c:6632 [inline]
 __handle_mm_fault mm/memory.c:6784 [inline]
 handle_mm_fault+0x1807/0x2f80 mm/memory.c:6951
 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: 0033:0x00007f91fda740b1
RSP: 002b:00007ffe9629db10 EFLAGS: 00010202
RAX: 0000001b34f24000 RBX: ffffffff826039aa RCX: 0000001b34f23ff8
RDX: 00000000005ffde8 RSI: 00000000005ffde8 RDI: 00007f91fe955700
RBP: 0000000000000001 R08: 0000000000000000 R09: 00007f91fde12000
R10: 00007f91fe955700 R11: 0000000000000000 R12: 00007f91fde26038
R13: 0000000000000000 R14: ffffffff826030c0 R15: 00007f91fe955720
 </TASK>
INFO: task syz.1.1883:10559 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.1.1883      state:D stack:24488 pid:10559 tgid:10559 ppid:5637   task_flags:0x440040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5583 [inline]
 __schedule+0x17dd/0x5830 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:7451
 __ext4_mark_inode_dirty+0x141/0x7e0 fs/ext4/inode.c:7642
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:7679
 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2751
 generic_update_time fs/inode.c:2264 [inline]
 file_update_time_flags+0x399/0x440 fs/inode.c:2494
 ext4_page_mkwrite+0x21f/0x1470 fs/ext4/inode.c:7864
 do_page_mkwrite+0x147/0x310 mm/memory.c:3856
 do_shared_fault mm/memory.c:6155 [inline]
 do_fault mm/memory.c:6217 [inline]
 do_pte_missing+0x70f/0x3570 mm/memory.c:4745
 handle_pte_fault mm/memory.c:6632 [inline]
 __handle_mm_fault mm/memory.c:6784 [inline]
 handle_mm_fault+0x1807/0x2f80 mm/memory.c:6951
 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: 0033:0x00007f06ca8740b1
RSP: 002b:00007ffc483bb2e0 EFLAGS: 00010202
RAX: 0000001b34c1e000 RBX: ffffffff8c05422e RCX: 0000001b34c1dff8
RDX: 0000001b3462421c RSI: 0000000000000008 RDI: 00007f06cb755720
RBP: 00000000000000ab R08: 00007f06cac10000 R09: 00007f06cac12000
R10: 000000008c054232 R11: 0000000000000003 R12: 00007f06cac26128
R13: 000000000000033c R14: ffffffff8c054da2 R15: 00007f06cb755720
 </TASK>
INFO: task syz.2.1884:10561 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.2.1884      state:D stack:24680 pid:10561 tgid:10561 ppid:5632   task_flags:0x440040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5583 [inline]
 __schedule+0x17dd/0x5830 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:7451
 __ext4_mark_inode_dirty+0x141/0x7e0 fs/ext4/inode.c:7642
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:7679
 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2751
 generic_update_time fs/inode.c:2264 [inline]
 file_update_time_flags+0x399/0x440 fs/inode.c:2494
 ext4_page_mkwrite+0x21f/0x1470 fs/ext4/inode.c:7864
 do_page_mkwrite+0x147/0x310 mm/memory.c:3856
 do_shared_fault mm/memory.c:6155 [inline]
 do_fault mm/memory.c:6217 [inline]
 do_pte_missing+0x70f/0x3570 mm/memory.c:4745
 handle_pte_fault mm/memory.c:6632 [inline]
 __handle_mm_fault mm/memory.c:6784 [inline]
 handle_mm_fault+0x1807/0x2f80 mm/memory.c:6951
 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: 0033:0x00007f96ed074111
RSP: 002b:00007ffdc52960f0 EFLAGS: 00010202
RAX: 0000001b34b24000 RBX: 0000000000000000 RCX: 00000000003ffde8
RDX: 0000001b34b23ffc RSI: 00000000003ffde8 RDI: 00007f96edf55700
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007f96ed412000
R10: 00007f96edf55700 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000005084 R14: ffffffff816ddefe R15: 00007f96edf55720
 </TASK>
INFO: task syz.4.1885:10564 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.4.1885      state:D stack:26936 pid:10564 tgid:10564 ppid:5634   task_flags:0x440040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5583 [inline]
 __schedule+0x17dd/0x5830 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:7451
 __ext4_mark_inode_dirty+0x141/0x7e0 fs/ext4/inode.c:7642
 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:7679
 __mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2751
 generic_update_time fs/inode.c:2264 [inline]
 touch_atime+0x568/0x670 fs/inode.c:2339
 file_accessed include/linux/fs.h:2283 [inline]
 ext4_file_mmap_prepare+0x277/0x450 fs/ext4/file.c:919
 vfs_mmap_prepare include/linux/fs.h:2075 [inline]
 call_mmap_prepare mm/vma.c:2986 [inline]
 __mmap_region mm/vma.c:3103 [inline]
 mmap_region+0x1191/0x2820 mm/vma.c:3201
 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+0x16a/0x530 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x00007fc2e339f882
RSP: 002b:00007fffdab49078 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000001b34a64000 RCX: 00007fc2e339f882
RDX: 0000000000000003 RSI: 00000000003c0000 RDI: 0000001b34a64000
RBP: 0000000000100001 R08: 0000000000000004 R09: 0000000000040000
R10: 0000000000100001 R11: 0000000000000206 R12: 0000000000000166
R13: 00000000000927c0 R14: 000000000003b78c R15: 00007fffdab49350
 </TASK>

Showing all locks held in the system:
locks held by kworker/u8:1/14: 4, on CPU#0:
 #0: ffff888021abd950 ((wq_completion)writeback){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #0: ffff888021abd950 ((wq_completion)writeback){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffff888021abd950 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline]
 #0: ffff888021abd950 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3588
 #1: ffffc90000137c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #1: ffffc90000137c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #1: ffffc90000137c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline]
 #1: ffffc90000137c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3588
 #2: ffff888035d9c100 (&type->s_umount_key#34){++++}-{4:4}, at: super_trylock_shared+0x23/0xf0 fs/super.c:642
 #3: ffff8880375e0cd8 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages+0x1f1/0x4e0 fs/ext4/inode.c:3170
locks held by khungtaskd/34: 1, last CPU#0:
 #0: ffffffff9015a560 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #0: ffffffff9015a560 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff9015a560 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6871
locks held by syz-executor/5618: 3, on CPU#0:
 #0: ffff88807aa43088 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:339
 #1: ffff888035d9c570 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
 #1: ffff888035d9c570 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x1fe/0x1470 fs/ext4/inode.c:7863
 #2: ffff888035d9a950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
locks held by syz.3.1877/10543: 3, on CPU#0:
 #0: ffff88807711f6c8 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:339
 #1: ffff888035d9c570 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
 #1: ffff888035d9c570 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x1fe/0x1470 fs/ext4/inode.c:7863
 #2: ffff888035d9a950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
locks held by syz.1.1883/10559: 3, on CPU#1:
 #0: ffff88807cc66d08 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:339
 #1: ffff888035d9c570 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
 #1: ffff888035d9c570 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x1fe/0x1470 fs/ext4/inode.c:7863
 #2: ffff888035d9a950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
locks held by syz.2.1884/10561: 3, on CPU#1:
 #0: ffff88803701d088 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:339
 #1: ffff888035d9c570 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
 #1: ffff888035d9c570 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x1fe/0x1470 fs/ext4/inode.c:7863
 #2: ffff888035d9a950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
locks held by syz.4.1885/10564: 3, on CPU#1:
 #0: ffff888036d0d900 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:566 [inline]
 #0: ffff888036d0d900 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x1ed/0x520 mm/util.c:579
 #1: ffff888035d9c478 (sb_writers#4){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2283 [inline]
 #1: ffff888035d9c478 (sb_writers#4){.+.+}-{0:0}, at: ext4_file_mmap_prepare+0x277/0x450 fs/ext4/file.c:919
 #2: ffff888035d9a950 (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: 34 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
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: 0 Comm: swapper/1 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: fa 8e 02 e9 43 17 03 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d a3 2a 20 00 fb f4 <c3> cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffc900001c7e40 EFLAGS: 00000246
RAX: 00000000000c12e1 RBX: ffffffff819cb8f0 RCX: 8000000000000001
RDX: 0000000000000001 RSI: ffffffff8e6ae1c1 RDI: ffffffff8c8eba80
RBP: ffffc900001c7f10 R08: ffff8880b8333d9b R09: 1ffff110170667b3
R10: dffffc0000000000 R11: ffffed10170667b4 R12: 0000000000000000
R13: 1ffff11003ed73e8 R14: 1ffff92000038fd0 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881234f9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd425a7de9c CR3: 000000000ff48000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/kernel/process.c:767 [inline]
 default_idle+0x9/0x20 arch/x86/kernel/process.c:768
 default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:199 [inline]
 do_idle+0x2e0/0x540 kernel/sched/idle.c:355
 cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:458
 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
 common_startup_64+0x13e/0x157
 </TASK>