INFO: task jbd2/sda1-8:4948 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jbd2/sda1-8 state:D stack:25288 pid:4948 tgid:4948 ppid:2 task_flags:0x240040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5527 [inline]
__schedule+0x17dd/0x5940 kernel/sched/core.c:7295
__schedule_loop kernel/sched/core.c:7372 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7387
io_schedule+0x7f/0xd0 kernel/sched/core.c:8059
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:444 [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:5606 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:22056 pid:5606 tgid:5606 ppid:5605 task_flags:0x440100 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5527 [inline]
__schedule+0x17dd/0x5940 kernel/sched/core.c:7295
__schedule_loop kernel/sched/core.c:7372 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7387
io_schedule+0x7f/0xd0 kernel/sched/core.c:8059
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:249
ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:6514
__ext4_mark_inode_dirty+0x141/0x7b0 fs/ext4/inode.c:6699
ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6736
__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+0x21f/0x12c0 fs/ext4/inode.c:6902
do_page_mkwrite+0x147/0x310 mm/memory.c:3779
wp_page_shared mm/memory.c:4180 [inline]
do_wp_page+0x1a97/0x4b70 mm/memory.c:4403
handle_pte_fault mm/memory.c:6551 [inline]
__handle_mm_fault mm/memory.c:6676 [inline]
handle_mm_fault+0x15d7/0x3750 mm/memory.c:6843
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: 0033:0x7f2c8907c6e2
RSP: 002b:00007ffc0f928b10 EFLAGS: 00010202
RAX: 00007f2c87104000 RBX: 000055555a2b9660 RCX: 0000000000000001
RDX: 0000000000003572 RSI: 000055555a2c0b20 RDI: 0000000000000002
RBP: 00007ffc0f929010 R08: 000055555a2c0c18 R09: 00000000000000a4
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc0f928e50
R13: 00007ffc0f928c40 R14: 585858582e7a7973 R15: 00007ffc0f928b90
INFO: task syz.3.825:8214 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.825 state:D stack:25608 pid:8214 tgid:8214 ppid:5622 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5527 [inline]
__schedule+0x17dd/0x5940 kernel/sched/core.c:7295
__schedule_loop kernel/sched/core.c:7372 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7387
io_schedule+0x7f/0xd0 kernel/sched/core.c:8059
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:249
ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:6514
__ext4_mark_inode_dirty+0x141/0x7b0 fs/ext4/inode.c:6699
ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6736
__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+0x21f/0x12c0 fs/ext4/inode.c:6902
do_page_mkwrite+0x147/0x310 mm/memory.c:3779
do_shared_fault mm/memory.c:6045 [inline]
do_fault mm/memory.c:6107 [inline]
do_pte_missing+0x757/0x34b0 mm/memory.c:4663
handle_pte_fault mm/memory.c:6527 [inline]
__handle_mm_fault mm/memory.c:6676 [inline]
handle_mm_fault+0x1a53/0x3750 mm/memory.c:6843
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: 0033:0x7f4ab72727a9
RSP: 002b:00007ffee06ef0e0 EFLAGS: 00010202
RAX: 0000001b34024000 RBX: ffffffff82570ada RCX: 0000001b34023ff8
RDX: 00000000005ffde8 RSI: 00000000005ffde8 RDI: 00007f4ab8155700
RBP: 0000000000000001 R08: 0000000000000000 R09: 00007f4ab7612000
R10: 00007f4ab8155700 R11: 0000000000000000 R12: 00007f4ab7626038
R13: 0000000000000000 R14: ffffffff825703b0 R15: 00007f4ab8155720
INFO: task syz.2.837:8228 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.837 state:D stack:27000 pid:8228 tgid:8228 ppid:5636 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5527 [inline]
__schedule+0x17dd/0x5940 kernel/sched/core.c:7295
__schedule_loop kernel/sched/core.c:7372 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7387
io_schedule+0x7f/0xd0 kernel/sched/core.c:8059
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:249
ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:6514
__ext4_mark_inode_dirty+0x141/0x7b0 fs/ext4/inode.c:6699
ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6736
__mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2729
generic_update_time fs/inode.c:2254 [inline]
touch_atime+0x568/0x670 fs/inode.c:2329
file_accessed include/linux/fs.h:2277 [inline]
ext4_file_mmap_prepare+0x277/0x450 fs/ext4/file.c:901
vfs_mmap_prepare include/linux/fs.h:2069 [inline]
call_mmap_prepare mm/vma.c:2792 [inline]
__mmap_region mm/vma.c:2890 [inline]
mmap_region+0xe95/0x23a0 mm/vma.c:2991
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+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2ac339dec2
RSP: 002b:00007ffc0c6f75d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000001b33964000 RCX: 00007f2ac339dec2
RDX: 0000000000000003 RSI: 00000000005c0000 RDI: 0000001b33964000
RBP: 0000000000100001 R08: 0000000000000004 R09: 0000000000040000
R10: 0000000000100001 R11: 0000000000000206 R12: 00000000000000bb
R13: 00000000000927c0 R14: 0000000000033155 R15: 00007ffc0c6f78b0
INFO: task syz.4.838:8229 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.838 state:D stack:27208 pid:8229 tgid:8229 ppid:5626 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5527 [inline]
__schedule+0x17dd/0x5940 kernel/sched/core.c:7295
__schedule_loop kernel/sched/core.c:7372 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7387
io_schedule+0x7f/0xd0 kernel/sched/core.c:8059
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:249
ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:6514
__ext4_mark_inode_dirty+0x141/0x7b0 fs/ext4/inode.c:6699
ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6736
__mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2729
generic_update_time fs/inode.c:2254 [inline]
touch_atime+0x568/0x670 fs/inode.c:2329
file_accessed include/linux/fs.h:2277 [inline]
ext4_file_mmap_prepare+0x277/0x450 fs/ext4/file.c:901
vfs_mmap_prepare include/linux/fs.h:2069 [inline]
call_mmap_prepare mm/vma.c:2792 [inline]
__mmap_region mm/vma.c:2890 [inline]
mmap_region+0xe95/0x23a0 mm/vma.c:2991
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+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa0ac79dec2
RSP: 002b:00007fff8ec57b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000001b33b64000 RCX: 00007fa0ac79dec2
RDX: 0000000000000003 RSI: 00000000005c0000 RDI: 0000001b33b64000
RBP: 0000000000100001 R08: 0000000000000004 R09: 0000000000040000
R10: 0000000000100001 R11: 0000000000000206 R12: 000000000000009d
R13: 00000000000927c0 R14: 00000000000331d0 R15: 00007fff8ec57e60
INFO: task syz.5.839:8230 blocked in I/O wait for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.839 state:D stack:27224 pid:8230 tgid:8230 ppid:7669 task_flags:0x440040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5527 [inline]
__schedule+0x17dd/0x5940 kernel/sched/core.c:7295
__schedule_loop kernel/sched/core.c:7372 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7387
io_schedule+0x7f/0xd0 kernel/sched/core.c:8059
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:249
ext4_reserve_inode_write+0x294/0x360 fs/ext4/inode.c:6514
__ext4_mark_inode_dirty+0x141/0x7b0 fs/ext4/inode.c:6699
ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6736
__mark_inode_dirty+0x3a8/0x13b0 fs/fs-writeback.c:2729
generic_update_time fs/inode.c:2254 [inline]
touch_atime+0x568/0x670 fs/inode.c:2329
file_accessed include/linux/fs.h:2277 [inline]
ext4_file_mmap_prepare+0x277/0x450 fs/ext4/file.c:901
vfs_mmap_prepare include/linux/fs.h:2069 [inline]
call_mmap_prepare mm/vma.c:2792 [inline]
__mmap_region mm/vma.c:2890 [inline]
mmap_region+0xe95/0x23a0 mm/vma.c:2991
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+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7effae39dec2
RSP: 002b:00007ffded3fa168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0000001b33564000 RCX: 00007effae39dec2
RDX: 0000000000000003 RSI: 00000000005c0000 RDI: 0000001b33564000
RBP: 0000000000100001 R08: 0000000000000004 R09: 0000000000040000
R10: 0000000000100001 R11: 0000000000000206 R12: 0000000000000015
R13: 00000000000927c0 R14: 00000000000331fc R15: 00007ffded3fa440
Showing all locks held in the system:
locks held by khungtaskd/34: 1, last CPU#0:
#0: ffffffff8ed5db60 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#0: ffffffff8ed5db60 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8ed5db60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6871
locks held by kworker/u8:3/51: 4, on CPU#0:
#0: ffff888020ac7140 ((wq_completion)writeback){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#0: ffff888020ac7140 ((wq_completion)writeback){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffff888020ac7140 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline]
#0: ffff888020ac7140 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3490
#1: ffffc90000bc7c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffc90000bc7c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffc90000bc7c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline]
#1: ffffc90000bc7c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3490
#2: ffff8880335e00e8 (&type->s_umount_key#34){++++}-{4:4}, at: super_trylock_shared+0x23/0xf0 fs/super.c:674
#3: ffff8880335f6c98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages+0x1f1/0x4e0 fs/ext4/inode.c:3031
locks held by kworker/u8:6/202: 3, last CPU#0:
#0: ffff88801b0ac140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#0: ffff88801b0ac140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffff88801b0ac140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline]
#0: ffff88801b0ac140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3490
#1: ffffc90002e2fc40 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffc90002e2fc40 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffc90002e2fc40 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3372 [inline]
#1: ffffc90002e2fc40 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3490
#2: ffff88807c96b258 (&devlink->lock_key){+.+.}-{4:4}, at: nsim_dev_trap_report_work+0x57/0xb30 drivers/net/netdevsim/dev.c:834
locks held by klogd/4975: 1, last CPU#0:
#0: ffffffff8ed5db60 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#0: ffffffff8ed5db60 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8ed5db60 (rcu_read_lock){....}-{1:3}, at: sock_def_readable+0xae/0x550 net/core/sock.c:3658
locks held by getty/5375: 2, on CPU#0:
#0: ffff8880356d40a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900032332e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360 drivers/tty/n_tty.c:2211
locks held by syz-executor/5606: 3, on CPU#0:
#0: ffff88802b510448 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:309
#1: ffff8880335e0558 (sb_pagefaults){++++}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
#1: ffff8880335e0558 (sb_pagefaults){++++}-{0:0}, at: ext4_page_mkwrite+0x1fd/0x12c0 fs/ext4/inode.c:6901
#2: ffff8880335f4938 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
locks held by syz.3.825/8214: 3, on CPU#0:
#0: ffff888056e82808 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x1d1/0x500 mm/mmap_lock.c:309
#1: ffff8880335e0558 (sb_pagefaults){++++}-{0:0}, at: sb_start_pagefault include/linux/fs/super.h:159 [inline]
#1: ffff8880335e0558 (sb_pagefaults){++++}-{0:0}, at: ext4_page_mkwrite+0x1fd/0x12c0 fs/ext4/inode.c:6901
#2: ffff8880335f4938 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
locks held by syz.2.837/8228: 3, on CPU#0:
#0: ffff88807cb77678 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:548 [inline]
#0: ffff88807cb77678 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x1dd/0x4e0 mm/util.c:579
#1: ffff8880335e0460 (sb_writers#4){++++}-{0:0}, at: file_accessed include/linux/fs.h:2277 [inline]
#1: ffff8880335e0460 (sb_writers#4){++++}-{0:0}, at: ext4_file_mmap_prepare+0x277/0x450 fs/ext4/file.c:901
#2: ffff8880335f4938 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
locks held by syz.4.838/8229: 3, on CPU#0:
#0: ffff88802a319d38 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:548 [inline]
#0: ffff88802a319d38 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x1dd/0x4e0 mm/util.c:579
#1: ffff8880335e0460 (sb_writers#4){++++}-{0:0}, at: file_accessed include/linux/fs.h:2277 [inline]
#1: ffff8880335e0460 (sb_writers#4){++++}-{0:0}, at: ext4_file_mmap_prepare+0x277/0x450 fs/ext4/file.c:901
#2: ffff8880335f4938 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1fb0/0x21f0 fs/jbd2/transaction.c:444
locks held by syz.5.839/8230: 3, on CPU#0:
#0: ffff88802a31d038 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:548 [inline]
#0: ffff88802a31d038 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x1dd/0x4e0 mm/util.c:579
#1: ffff8880335e0460 (sb_writers#4){++++}-{0:0}, at: file_accessed include/linux/fs.h:2277 [inline]
#1: ffff8880335e0460 (sb_writers#4){++++}-{0:0}, at: ext4_file_mmap_prepare+0x277/0x450 fs/ext4/file.c:901
#2: ffff8880335f4938 (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 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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+0x1058/0x10d0 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