INFO: task syz.5.965:14784 blocked for more than 143 seconds.
      Tainted: G        W           6.17.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.965       state:D stack:24456 pid:14784 tgid:14783 ppid:13081  task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x16f3/0x4c20 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:7058
 schedule_timeout+0x9a/0x270 kernel/time/sleep_timeout.c:75
 do_wait_for_common kernel/sched/completion.c:100 [inline]
 __wait_for_common kernel/sched/completion.c:121 [inline]
 wait_for_common kernel/sched/completion.c:132 [inline]
 wait_for_completion+0x2bf/0x5d0 kernel/sched/completion.c:153
 f2fs_issue_checkpoint+0x376/0x570 fs/f2fs/checkpoint.c:-1
 f2fs_do_sync_file+0x86c/0x1860 fs/f2fs/file.c:346
 generic_write_sync include/linux/fs.h:3042 [inline]
 f2fs_file_write_iter+0x752/0x2400 fs/f2fs/file.c:5259
 do_iter_readv_writev+0x62b/0x8d0 fs/read_write.c:-1
 vfs_writev+0x323/0x970 fs/read_write.c:1057
 do_pwritev fs/read_write.c:1153 [inline]
 __do_sys_pwritev fs/read_write.c:1199 [inline]
 __se_sys_pwritev fs/read_write.c:1194 [inline]
 __x64_sys_pwritev+0x19a/0x2a0 fs/read_write.c:1194
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff4db04ebe9
RSP: 002b:00007ff4d92ae038 EFLAGS: 00000246 ORIG_RAX: 0000000000000128
RAX: ffffffffffffffda RBX: 00007ff4db275fa0 RCX: 00007ff4db04ebe9
RDX: 0000000000000001 RSI: 0000200000000140 RDI: 0000000000000009
RBP: 00007ff4db0d1e19 R08: 0000000000000097 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff4db276038 R14: 00007ff4db275fa0 R15: 00007fff0e0a9718
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 39 Comm: khungtaskd Tainted: G        W           6.17.0-rc2-syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline]
 watchdog+0xf93/0xfe0 kernel/hung_task.c:491
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 14808 Comm: f2fs_ckpt-7:5 Tainted: G        W           6.17.0-rc2-syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__kasan_check_read+0x0/0x20 mm/kasan/shadow.c:30
Code: 21 8d 48 89 de e8 f0 bf 09 ff 31 ed eb cf cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 89 f6 48 8b 0c 24 31 d2 e9 ef e4 ff ff 66 66 66 66 66
RSP: 0018:ffffc90003f7f480 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: c9da2151fdd30e00
RDX: ffff888031028000 RSI: 0000000000000008 RDI: ffffffff8f1d3c30
RBP: ffffc90003f7f530 R08: 0000000000000001 R09: 0000000000000000
R10: ffffc90003f7f680 R11: fffff520007efefe R12: dffffc0000000000
R13: ffffc90003f7f588 R14: 0000000000000a02 R15: 1ffff920007efe94
FS:  0000000000000000(0000) GS:ffff8881268c5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f05708aae80 CR3: 0000000036d6a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 cpumask_test_cpu include/linux/cpumask.h:646 [inline]
 cpu_online include/linux/cpumask.h:1205 [inline]
 trace_irq_disable+0x28/0x110 include/trace/events/preemptirq.h:36
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]
 _raw_spin_lock_irqsave+0x82/0xf0 kernel/locking/spinlock.c:162
 rtlock_slowlock kernel/locking/rtmutex.c:1894 [inline]
 rtlock_lock kernel/locking/spinlock_rt.c:43 [inline]
 __rt_spin_lock kernel/locking/spinlock_rt.c:49 [inline]
 rt_spin_lock+0x144/0x2c0 kernel/locking/spinlock_rt.c:57
 spin_lock include/linux/spinlock_rt.h:44 [inline]
 writeback_single_inode+0x36/0x640 fs/fs-writeback.c:1769
 sync_inode_metadata+0xb9/0x110 fs/fs-writeback.c:2883
 f2fs_sync_inode_meta fs/f2fs/checkpoint.c:1152 [inline]
 block_operations fs/f2fs/checkpoint.c:1263 [inline]
 f2fs_write_checkpoint+0xb06/0x1df0 fs/f2fs/checkpoint.c:1638
 __write_checkpoint_sync fs/f2fs/checkpoint.c:1756 [inline]
 __checkpoint_and_complete_reqs+0xd9/0x3b0 fs/f2fs/checkpoint.c:1775
 issue_checkpoint_thread+0xd9/0x260 fs/f2fs/checkpoint.c:1806
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>