watchdog: BUG: soft lockup - CPU#0 stuck for 24s! [kworker/u4:1:136]
Modules linked in:
irq event stamp: 2628988
hardirqs last  enabled at (2628987): [<ffff80001119d494>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline]
hardirqs last  enabled at (2628987): [<ffff80001119d494>] exit_to_kernel_mode+0xe0/0x168 arch/arm64/kernel/entry-common.c:91
hardirqs last disabled at (2628988): [<ffff80001119d6ec>] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227
softirqs last  enabled at (2616782): [<ffff80000819d8d8>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (2616782): [<ffff80000819d8d8>] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:586
softirqs last disabled at (2616697): [<ffff80000819dedc>] __do_softirq kernel/softirq.c:592 [inline]
softirqs last disabled at (2616697): [<ffff80000819dedc>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (2616697): [<ffff80000819dedc>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (2616697): [<ffff80000819dedc>] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:641
CPU: 0 PID: 136 Comm: kworker/u4:1 Not tainted 5.15.180-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: writeback wb_workfn (flush-259:0)
pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : queued_spin_lock_slowpath+0x13c/0x798 kernel/locking/qspinlock.c:382
lr : queued_spin_lock_slowpath+0x148/0x798 kernel/locking/qspinlock.c:382
sp : ffff80001bd66500
x29: ffff80001bd665a0 x28: ffff8000140a1008 x27: 1fffe0001e6c3a31
x26: 0000000000000001 x25: ffff0000c226b680 x24: dfff800000000000
x23: ffff7000037acca4 x22: 1ffff000037accc4 x21: ffff0000f361d188
x20: ffff0000f361d190 x19: ffff0000f361d180 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000082d4dc8 x15: 0000000000000406
x14: 0000000000ff0100 x13: 1ffff0000282a06b x12: 0000000000000001
x11: 1fffe0001e6c3a30 x10: 0000000000000000 x9 : 0000000000000000
x8 : 0000000000000101 x7 : ffff800008787e08 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000082d40cc
x2 : 0000000000000000 x1 : 0000000000000004 x0 : 0000000000000001
Call trace:
 __cmpwait_case_32 arch/arm64/include/asm/cmpxchg.h:252 [inline]
 __cmpwait arch/arm64/include/asm/cmpxchg.h:278 [inline]
 queued_spin_lock_slowpath+0x13c/0x798 kernel/locking/qspinlock.c:382
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock+0x2ec/0x2f0 kernel/locking/spinlock_debug.c:115
 __raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_lock+0xb8/0x10c kernel/locking/spinlock.c:154
 page_vma_mapped_walk+0x1090/0x1298 mm/page_vma_mapped.c:-1
 page_mkclean_one+0x110/0x31c mm/rmap.c:926
 rmap_walk_file+0x370/0x55c mm/rmap.c:2378
 rmap_walk mm/rmap.c:2396 [inline]
 page_mkclean+0x270/0x36c mm/rmap.c:1006
 clear_page_dirty_for_io+0x2d4/0x864 mm/page-writeback.c:2749
 mpage_submit_page fs/ext4/inode.c:2092 [inline]
 mpage_process_page_bufs+0x618/0x8c4 fs/ext4/inode.c:2226
 mpage_prepare_extent_to_map+0x9a0/0xda4 fs/ext4/inode.c:2654
 ext4_writepages+0x7b0/0x2c14 fs/ext4/inode.c:2782
 do_writepages+0x36c/0x578 mm/page-writeback.c:2386
 __writeback_single_inode+0x148/0x11f0 fs/fs-writeback.c:1647
 writeback_sb_inodes+0x7fc/0x1378 fs/fs-writeback.c:1930
 __writeback_inodes_wb+0x110/0x394 fs/fs-writeback.c:2001
 wb_writeback+0x3ec/0xe44 fs/fs-writeback.c:2106
 wb_check_background_flush fs/fs-writeback.c:2172 [inline]
 wb_do_writeback fs/fs-writeback.c:2260 [inline]
 wb_workfn+0xa7c/0xdd8 fs/fs-writeback.c:2288
 process_one_work+0x79c/0x1140 kernel/workqueue.c:2310
 worker_thread+0x8f4/0x101c kernel/workqueue.c:2457
 kthread+0x374/0x454 kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870