INFO: task kworker/u8:12:4332 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/u8:12 state:D stack:22696 pid:4332 tgid:4332 ppid:2 task_flags:0x4208160 flags:0x00080000
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
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
__block_write_full_folio+0x80e/0xdb0 fs/buffer.c:1819
blkdev_writepages+0xef/0x1b0 block/fops.c:500
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
INFO: task jbd2/sda1-8:4968 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:25152 pid:4968 tgid:4968 ppid:2 task_flags:0x240040 flags:0x00080000
Call Trace:
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
INFO: task syz-executor:5627 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:22536 pid:5627 tgid:5627 ppid:5626 task_flags:0x440100 flags:0x00080000
Call Trace:
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: 0033:0x00007f4438f6eb07
RSP: 002b:00007ffe2823ab08 EFLAGS: 00010207
RAX: 00007f4432200000 RBX: 000055558bfa8790 RCX: 00007f4432200000
RDX: 00007f44322009cb RSI: 000055558c01cd00 RDI: 00007f4432200020
RBP: 00007ffe2823ab20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000055558bf9e440
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
INFO: task syz.5.379:8006 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.5.379 state:D stack:24680 pid:8006 tgid:8006 ppid:6530 task_flags:0x440040 flags:0x00080002
Call Trace:
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: 0033:0x00007ff7cf6740b1
RSP: 002b:00007ffcc4e84b30 EFLAGS: 00010202
RAX: 0000001b3440c000 RBX: ffffffff8c03feba RCX: 0000001b3440bff8
RDX: 0000001b34024220 RSI: 0000000000000008 RDI: 00007ff7d0555720
RBP: 00000000000000b0 R08: 00007ff7cfa10000 R09: 00007ff7cfa12000
R10: 000000008c03febe R11: 0000000000000000 R12: 00007ff7cfa26038
R13: 00000000000000b5 R14: ffffffff8c03f2c6 R15: 00007ff7d0555720
INFO: task syz.1.382:8010 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.1.382 state:D stack:24680 pid:8010 tgid:8010 ppid:5660 task_flags:0x440040 flags:0x00080002
Call Trace:
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: 0033:0x00007ffa74274111
RSP: 002b:00007ffc331deab0 EFLAGS: 00010202
RAX: 0000001b2d224000 RBX: 0000000000000000 RCX: 00000000003ffde8
RDX: 0000001b2d223ffc RSI: 00000000003ffde8 RDI: 00007ffa75155700
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffa74612000
R10: 00007ffa75155700 R11: 0000000000000000 R12: 0000000000000000
R13: 000000000007ffff R14: ffffffff8216b54b R15: 00007ffa75155720
INFO: task syz.6.381:8012 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.6.381 state:D stack:24472 pid:8012 tgid:8012 ppid:7012 task_flags:0x440040 flags:0x00080002
Call Trace:
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: 0033:0x00007fad59c740b1
RSP: 002b:00007fffe4a04c20 EFLAGS: 00010202
RAX: 0000001b32620000 RBX: ffffffff8268f423 RCX: 0000001b3261fff8
RDX: 0000001b32224220 RSI: 0000000000000008 RDI: 00007fad5ab55720
RBP: 0000000000000038 R08: 00007fad5a010000 R09: 00007fad5a012000
R10: 000000008268f427 R11: 0000000000000000 R12: 00007fad5a026218
R13: 000000000000003b R14: ffffffff8268f553 R15: 00007fad5ab55720
INFO: task syz.2.383:8018 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.2.383 state:D stack:26184 pid:8018 tgid:8018 ppid:5640 task_flags:0x440040 flags:0x00080002
Call Trace:
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: 0033:0x00007feca1c6c7c3
RSP: 002b:00007ffd45d83670 EFLAGS: 00010246
RAX: 000000000003fde8 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000001b2cf24000 RSI: 0000000000040000 RDI: 00007feca1fe8708
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffd45d83900
Showing all locks held in the system:
locks held by khungtaskd/34: 1, last CPU#1:
#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 kworker/u8:12/4332: 3, on CPU#0:
#0: ffff888021ad6150 ((wq_completion)writeback){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#0: ffff888021ad6150 ((wq_completion)writeback){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffff888021ad6150 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline]
#0: ffff888021ad6150 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3588
#1: ffffc9000f70fc40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffc9000f70fc40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffc9000f70fc40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline]
#1: ffffc9000f70fc40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3588
#2: ffff88801dedc100 (&type->s_umount_key#43){.+.+}-{4:4}, at: super_trylock_shared+0x23/0xf0 fs/super.c:642
locks held by getty/5396: 2, on CPU#1:
#0: ffff8880375260a0 (&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/5627: 3, on CPU#0:
#0: ffff88807a7a11c8 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:339
#1: ffff888037902570 (sb_pagefaults){++++}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
#1: ffff888037902570 (sb_pagefaults){++++}-{0:0}, at: ext4_page_mkwrite+0x1fe/0x1470 fs/ext4/inode.c:7863
#2: ffff888037900950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
locks held by syz.5.379/8006: 3, on CPU#0:
#0: ffff8880577e3808 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:339
#1: ffff888037902570 (sb_pagefaults){++++}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
#1: ffff888037902570 (sb_pagefaults){++++}-{0:0}, at: ext4_page_mkwrite+0x1fe/0x1470 fs/ext4/inode.c:7863
#2: ffff888037900950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
locks held by syz.1.382/8010: 3, on CPU#1:
#0: ffff88802b762bc8 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:339
#1: ffff888037902570 (sb_pagefaults){++++}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
#1: ffff888037902570 (sb_pagefaults){++++}-{0:0}, at: ext4_page_mkwrite+0x1fe/0x1470 fs/ext4/inode.c:7863
#2: ffff888037900950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
locks held by syz.6.381/8012: 3, on CPU#0:
#0: ffff88805b63d088 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:339
#1: ffff888037902570 (sb_pagefaults){++++}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
#1: ffff888037902570 (sb_pagefaults){++++}-{0:0}, at: ext4_page_mkwrite+0x1fe/0x1470 fs/ext4/inode.c:7863
#2: ffff888037900950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
locks held by syz.2.383/8018: 3, on CPU#0:
#0: ffff8880775c91c8 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:339
#1: ffff888037902570 (sb_pagefaults){++++}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
#1: ffff888037902570 (sb_pagefaults){++++}-{0:0}, at: ext4_page_mkwrite+0x1fe/0x1470 fs/ext4/inode.c:7863
#2: ffff888037900950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
=============================================
NMI backtrace for cpu 1
CPU: 1 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:
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
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 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 8c 02 e9 83 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 1a 1e 00 fb f4 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffffff8fe07ca0 EFLAGS: 00000246
RAX: 00000000003c1271 RBX: ffffffff819cc150 RCX: 8000000000000001
RDX: 0000000000000001 RSI: ffffffff8e6af44b RDI: ffffffff8c8eba80
RBP: ffffffff8fe07d78 R08: ffff8880b8233d9b R09: 1ffff110170467b3
R10: dffffc0000000000 R11: ffffed10170467b4 R12: 0000000000000000
R13: 1ffffffff1fd1df8 R14: 1ffffffff1fc0f9c R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8881233f0000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556ce3816168 CR3: 000000000ff48000 CR4: 00000000003526f0
Call Trace:
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
rest_init+0x378/0x3a0 init/main.c:789
start_kernel+0x392/0x3e0 init/main.c:1247
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x137/0x1b0 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x157