INFO: task kworker/u4:0:11 blocked for more than 143 seconds.
Tainted: G S syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:0 state:D stack:21784 pid:11 ppid:2 flags:0x00004000
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
context_switch kernel/sched/core.c:5393 [inline]
__schedule+0x15ae/0x4700 kernel/sched/core.c:6722
schedule+0xbd/0x170 kernel/sched/core.c:6796
io_schedule+0x80/0xd0 kernel/sched/core.c:9075
bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:209
__wait_on_bit+0x9f/0x2c0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x13c/0x190 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:101 [inline]
do_get_write_access+0x5c9/0xe00 fs/jbd2/transaction.c:1096
jbd2_journal_get_write_access+0x10c/0x140 fs/jbd2/transaction.c:1231
__ext4_journal_get_write_access+0x208/0x6d0 fs/ext4/ext4_jbd2.c:241
ext4_mb_mark_diskspace_used+0x27c/0x14b0 fs/ext4/mballoc.c:4050
ext4_mb_new_blocks+0x105b/0x42f0 fs/ext4/mballoc.c:6272
ext4_ext_map_blocks+0x1811/0x68c0 fs/ext4/extents.c:4416
ext4_map_blocks+0x9db/0x1a90 fs/ext4/inode.c:654
mpage_map_one_extent fs/ext4/inode.c:2205 [inline]
mpage_map_and_submit_extent fs/ext4/inode.c:2258 [inline]
ext4_do_writepages+0x1463/0x3990 fs/ext4/inode.c:2733
ext4_writepages+0x1dd/0x350 fs/ext4/inode.c:2822
do_writepages+0x351/0x590 mm/page-writeback.c:2575
__writeback_single_inode+0x14e/0xee0 fs/fs-writeback.c:1701
writeback_sb_inodes+0x813/0x1020 fs/fs-writeback.c:1992
__writeback_inodes_wb+0x114/0x240 fs/fs-writeback.c:2063
wb_writeback+0x472/0xbe0 fs/fs-writeback.c:2173
wb_check_old_data_flush fs/fs-writeback.c:2277 [inline]
wb_do_writeback fs/fs-writeback.c:2330 [inline]
wb_workfn+0xad7/0xe60 fs/fs-writeback.c:2358
process_one_work kernel/workqueue.c:2657 [inline]
process_scheduled_works+0xa60/0x1600 kernel/workqueue.c:2734
worker_thread+0xa5e/0xfe0 kernel/workqueue.c:2815
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
INFO: task jbd2/sda1-8:5119 blocked for more than 144 seconds.
Tainted: G S syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jbd2/sda1-8 state:D stack:25736 pid:5119 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5393 [inline]
__schedule+0x15ae/0x4700 kernel/sched/core.c:6722
schedule+0xbd/0x170 kernel/sched/core.c:6796
io_schedule+0x80/0xd0 kernel/sched/core.c:9075
bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:209
__wait_on_bit+0x9f/0x2c0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x13c/0x190 kernel/sched/wait_bit.c:64
wait_on_buffer include/linux/buffer_head.h:373 [inline]
jbd2_journal_commit_transaction+0x2e90/0x5ad0 fs/jbd2/commit.c:815
kjournald2+0x40f/0x810 fs/jbd2/journal.c:201
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
INFO: task syz-executor:5778 blocked for more than 144 seconds.
Tainted: G S syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21840 pid:5778 ppid:5777 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5393 [inline]
__schedule+0x15ae/0x4700 kernel/sched/core.c:6722
schedule+0xbd/0x170 kernel/sched/core.c:6796
io_schedule+0x80/0xd0 kernel/sched/core.c:9075
bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:209
__wait_on_bit+0x9f/0x2c0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x13c/0x190 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:101 [inline]
do_get_write_access+0x5c9/0xe00 fs/jbd2/transaction.c:1096
jbd2_journal_get_write_access+0x10c/0x140 fs/jbd2/transaction.c:1231
__ext4_journal_get_write_access+0x208/0x6d0 fs/ext4/ext4_jbd2.c:241
ext4_reserve_inode_write+0x205/0x2a0 fs/ext4/inode.c:5967
__ext4_mark_inode_dirty+0x13f/0x720 fs/ext4/inode.c:6151
ext4_dirty_inode+0xcb/0x110 fs/ext4/inode.c:6188
__mark_inode_dirty+0x2cc/0xc90 fs/fs-writeback.c:2537
generic_update_time fs/inode.c:1978 [inline]
inode_update_time fs/inode.c:1991 [inline]
__file_update_time fs/inode.c:2177 [inline]
file_update_time+0x187/0x1a0 fs/inode.c:2207
ext4_page_mkwrite+0x1f9/0x11a0 fs/ext4/inode.c:6306
do_page_mkwrite+0x153/0x3f0 mm/memory.c:2951
wp_page_shared mm/memory.c:3311 [inline]
do_wp_page+0xd4d/0x34d0 mm/memory.c:3396
handle_pte_fault mm/memory.c:5063 [inline]
__handle_mm_fault mm/memory.c:5190 [inline]
handle_mm_fault+0x1300/0x4a40 mm/memory.c:5355
do_user_addr_fault+0x736/0x12d0 arch/x86/mm/fault.c:1371
handle_page_fault arch/x86/mm/fault.c:1463 [inline]
exc_page_fault+0x64/0x100 arch/x86/mm/fault.c:1516
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7fb34b67dad6
RSP: 002b:00007ffeb2975c50 EFLAGS: 00010202
RAX: 00007fb349504000 RBX: 000055557363c100 RCX: 0000000000000002
RDX: 0000000000000ba0 RSI: 000055557363fb88 RDI: 0000000000000004
RBP: 00007ffeb2976150 R08: 000055557363fbd8 R09: 0000000000000093
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffeb2975f90
R13: 00007ffeb2975d80 R14: 585858582e7a7973 R15: 00007ffeb2975cd0
INFO: task syz.4.4297:20028 blocked for more than 144 seconds.
Tainted: G S syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.4297 state:D stack:27048 pid:20028 ppid:18928 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5393 [inline]
__schedule+0x15ae/0x4700 kernel/sched/core.c:6722
schedule+0xbd/0x170 kernel/sched/core.c:6796
io_schedule+0x80/0xd0 kernel/sched/core.c:9075
bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:209
__wait_on_bit+0x9f/0x2c0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x13c/0x190 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:101 [inline]
do_get_write_access+0x5c9/0xe00 fs/jbd2/transaction.c:1096
jbd2_journal_get_write_access+0x10c/0x140 fs/jbd2/transaction.c:1231
__ext4_journal_get_write_access+0x208/0x6d0 fs/ext4/ext4_jbd2.c:241
ext4_reserve_inode_write+0x205/0x2a0 fs/ext4/inode.c:5967
__ext4_mark_inode_dirty+0x13f/0x720 fs/ext4/inode.c:6151
ext4_dirty_inode+0xcb/0x110 fs/ext4/inode.c:6188
__mark_inode_dirty+0x2cc/0xc90 fs/fs-writeback.c:2537
generic_update_time fs/inode.c:1978 [inline]
inode_update_time fs/inode.c:1991 [inline]
__file_update_time fs/inode.c:2177 [inline]
file_update_time+0x187/0x1a0 fs/inode.c:2207
ext4_page_mkwrite+0x1f9/0x11a0 fs/ext4/inode.c:6306
do_page_mkwrite+0x153/0x3f0 mm/memory.c:2951
do_shared_fault mm/memory.c:4717 [inline]
do_fault mm/memory.c:4779 [inline]
do_pte_missing mm/memory.c:3689 [inline]
handle_pte_fault mm/memory.c:5047 [inline]
__handle_mm_fault mm/memory.c:5190 [inline]
handle_mm_fault+0x1a26/0x4a40 mm/memory.c:5355
do_user_addr_fault+0x736/0x12d0 arch/x86/mm/fault.c:1371
handle_page_fault arch/x86/mm/fault.c:1463 [inline]
exc_page_fault+0x64/0x100 arch/x86/mm/fault.c:1516
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7fed8ba73c09
RSP: 002b:00007fffc7111720 EFLAGS: 00010202
RAX: 0000001b32524000 RBX: 0000000000000000 RCX: 00000000003ffde8
RDX: 0000001b32523ffc RSI: 00000000003ffde8 RDI: 00007fed8c955700
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fed8be12000
R10: 00007fed8c955700 R11: 0000000000000000 R12: 0000000000000000
R13: 000000000007ffff R14: ffffffff83c6aee7 R15: 00007fed8c955720
INFO: task syz.6.4305:20048 blocked for more than 145 seconds.
Tainted: G S syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.4305 state:D stack:27048 pid:20048 ppid:13473 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5393 [inline]
__schedule+0x15ae/0x4700 kernel/sched/core.c:6722
schedule+0xbd/0x170 kernel/sched/core.c:6796
io_schedule+0x80/0xd0 kernel/sched/core.c:9075
bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:209
__wait_on_bit+0x9f/0x2c0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x13c/0x190 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:101 [inline]
do_get_write_access+0x5c9/0xe00 fs/jbd2/transaction.c:1096
jbd2_journal_get_write_access+0x10c/0x140 fs/jbd2/transaction.c:1231
__ext4_journal_get_write_access+0x208/0x6d0 fs/ext4/ext4_jbd2.c:241
ext4_reserve_inode_write+0x205/0x2a0 fs/ext4/inode.c:5967
__ext4_mark_inode_dirty+0x13f/0x720 fs/ext4/inode.c:6151
ext4_dirty_inode+0xcb/0x110 fs/ext4/inode.c:6188
__mark_inode_dirty+0x2cc/0xc90 fs/fs-writeback.c:2537
generic_update_time fs/inode.c:1978 [inline]
inode_update_time fs/inode.c:1991 [inline]
__file_update_time fs/inode.c:2177 [inline]
file_update_time+0x187/0x1a0 fs/inode.c:2207
ext4_page_mkwrite+0x1f9/0x11a0 fs/ext4/inode.c:6306
do_page_mkwrite+0x153/0x3f0 mm/memory.c:2951
do_shared_fault mm/memory.c:4717 [inline]
do_fault mm/memory.c:4779 [inline]
do_pte_missing mm/memory.c:3689 [inline]
handle_pte_fault mm/memory.c:5047 [inline]
__handle_mm_fault mm/memory.c:5190 [inline]
handle_mm_fault+0x1a26/0x4a40 mm/memory.c:5355
do_user_addr_fault+0x736/0x12d0 arch/x86/mm/fault.c:1371
handle_page_fault arch/x86/mm/fault.c:1463 [inline]
exc_page_fault+0x64/0x100 arch/x86/mm/fault.c:1516
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7faae6073c09
RSP: 002b:00007ffd6514ef20 EFLAGS: 00010202
RAX: 0000001b2ff24000 RBX: 0000000000000000 RCX: 00000000003ffde8
RDX: 0000001b2ff23ffc RSI: 00000000003ffde8 RDI: 00007faae6f55700
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007faae6412000
R10: 00007faae6f55700 R11: 0000000000000000 R12: 0000000000000000
R13: 000000000000fe89 R14: ffffffff8132425e R15: 00007faae6f55720
INFO: task syz.2.4310:20059 blocked for more than 145 seconds.
Tainted: G S syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.4310 state:D stack:25384 pid:20059 ppid:8348 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5393 [inline]
__schedule+0x15ae/0x4700 kernel/sched/core.c:6722
schedule+0xbd/0x170 kernel/sched/core.c:6796
io_schedule+0x80/0xd0 kernel/sched/core.c:9075
bit_wait_io+0x11/0xd0 kernel/sched/wait_bit.c:209
__wait_on_bit+0x9f/0x2c0 kernel/sched/wait_bit.c:49
out_of_line_wait_on_bit+0x13c/0x190 kernel/sched/wait_bit.c:64
wait_on_bit_io include/linux/wait_bit.h:101 [inline]
do_get_write_access+0x5c9/0xe00 fs/jbd2/transaction.c:1096
jbd2_journal_get_write_access+0x10c/0x140 fs/jbd2/transaction.c:1231
__ext4_journal_get_write_access+0x208/0x6d0 fs/ext4/ext4_jbd2.c:241
ext4_reserve_inode_write+0x205/0x2a0 fs/ext4/inode.c:5967
__ext4_mark_inode_dirty+0x13f/0x720 fs/ext4/inode.c:6151
ext4_dirty_inode+0xcb/0x110 fs/ext4/inode.c:6188
__mark_inode_dirty+0x2cc/0xc90 fs/fs-writeback.c:2537
generic_update_time fs/inode.c:1978 [inline]
inode_update_time fs/inode.c:1991 [inline]
__file_update_time fs/inode.c:2177 [inline]
file_update_time+0x187/0x1a0 fs/inode.c:2207
ext4_page_mkwrite+0x1f9/0x11a0 fs/ext4/inode.c:6306
do_page_mkwrite+0x153/0x3f0 mm/memory.c:2951
do_shared_fault mm/memory.c:4717 [inline]
do_fault mm/memory.c:4779 [inline]
do_pte_missing mm/memory.c:3689 [inline]
handle_pte_fault mm/memory.c:5047 [inline]
__handle_mm_fault mm/memory.c:5190 [inline]
handle_mm_fault+0x1a26/0x4a40 mm/memory.c:5355
do_user_addr_fault+0x736/0x12d0 arch/x86/mm/fault.c:1371
handle_page_fault arch/x86/mm/fault.c:1463 [inline]
exc_page_fault+0x64/0x100 arch/x86/mm/fault.c:1516
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7f7381e73c09
RSP: 002b:00007ffdce4a2970 EFLAGS: 00010202
RAX: 0000001b2d224000 RBX: 0000000000000000 RCX: 00000000003ffde8
RDX: 0000001b2d223ffc RSI: 00000000003ffde8 RDI: 00007f7382d55700
RBP: 0000000000000000 R08: 0000000000000000 R09: 00007f7382212000
R10: 00007f7382d55700 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000b38 R14: ffffffff813241a0 R15: 00007f7382d55720
Showing all locks held in the system:
6 locks held by kworker/u4:0/11:
#0: ffff888142655538 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2632 [inline]
#0: ffff888142655538 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x975/0x1600 kernel/workqueue.c:2734
#1: ffffc90000107d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2632 [inline]
#1: ffffc90000107d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x975/0x1600 kernel/workqueue.c:2734
#2: ffff88814e0180e0 (&type->s_umount_key#32){++++}-{3:3}, at: super_trylock_shared+0x20/0xf0 fs/super.c:604
#3: ffff88814e01ac58 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages_down_read fs/ext4/ext4.h:1768 [inline]
#3: ffff88814e01ac58 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages+0x1a4/0x350 fs/ext4/inode.c:2821
#4: ffff88814e01c990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f3f/0x2170 fs/jbd2/transaction.c:448
#5: ffff8880795f5288 (&ei->i_data_sem){++++}-{3:3}, at: ext4_map_blocks+0x918/0x1a90 fs/ext4/inode.c:647
1 lock held by khungtaskd/29:
#0: ffffffff8e1322e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
#0: ffffffff8e1322e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
#0: ffffffff8e1322e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6669
3 locks held by syz-executor/5778:
#0: ffff88805935f3a0 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline]
#0: ffff88805935f3a0 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5382 [inline]
#0: ffff88805935f3a0 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/memory.c:5442
#1: ffff88814e018510 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1634 [inline]
#1: ffff88814e018510 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1738 [inline]
#1: ffff88814e018510 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x1e2/0x11a0 fs/ext4/inode.c:6305
#2: ffff88814e01c990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f3f/0x2170 fs/jbd2/transaction.c:448
2 locks held by getty/9635:
#0: ffff8880331020a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000356f2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x428/0x1370 drivers/tty/n_tty.c:2217
3 locks held by syz.4.4297/20028:
#0: ffff8880315ad720 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline]
#0: ffff8880315ad720 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5382 [inline]
#0: ffff8880315ad720 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/memory.c:5442
#1: ffff88814e018510 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1634 [inline]
#1: ffff88814e018510 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1738 [inline]
#1: ffff88814e018510 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x1e2/0x11a0 fs/ext4/inode.c:6305
#2: ffff88814e01c990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f3f/0x2170 fs/jbd2/transaction.c:448
3 locks held by syz.6.4305/20048:
#0: ffff888018c69e20 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline]
#0: ffff888018c69e20 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5382 [inline]
#0: ffff888018c69e20 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/memory.c:5442
#1: ffff88814e018510 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1634 [inline]
#1: ffff88814e018510 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1738 [inline]
#1: ffff88814e018510 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x1e2/0x11a0 fs/ext4/inode.c:6305
#2: ffff88814e01c990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f3f/0x2170 fs/jbd2/transaction.c:448
3 locks held by syz.2.4310/20059:
#0: ffff888077f3b120 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:165 [inline]
#0: ffff888077f3b120 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5382 [inline]
#0: ffff888077f3b120 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/memory.c:5442
#1: ffff88814e018510 (sb_pagefaults){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1634 [inline]
#1: ffff88814e018510 (sb_pagefaults){.+.+}-{0:0}, at: sb_start_pagefault include/linux/fs.h:1738 [inline]
#1: ffff88814e018510 (sb_pagefaults){.+.+}-{0:0}, at: ext4_page_mkwrite+0x1e2/0x11a0 fs/ext4/inode.c:6305
#2: ffff88814e01c990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f3f/0x2170 fs/jbd2/transaction.c:448
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Tainted: G S syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
nmi_cpu_backtrace+0x3a6/0x3e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x2f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf59/0xfa0 kernel/hung_task.c:379
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293