INFO: task kworker/u8:18:18346 blocked for more than 143 seconds.
      Not tainted 6.13.0-syzkaller-07632-gaa22f4da2a46 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:18   state:D stack:20656 pid:18346 tgid:18346 ppid:2      flags:0x00004000
Workqueue: writeback wb_workfn (flush-7:5)
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5377 [inline]
 __schedule+0x186c/0x4be0 kernel/sched/core.c:6764
 __schedule_loop kernel/sched/core.c:6841 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6856
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6913
 __mutex_lock_common kernel/locking/mutex.c:662 [inline]
 __mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730
 hfs_find_init+0x16e/0x1f0
 hfs_ext_write_extent+0x12c/0x1d0 fs/hfs/extent.c:141
 hfs_write_inode+0xbc/0xec0 fs/hfs/inode.c:429
 write_inode fs/fs-writeback.c:1525 [inline]
 __writeback_single_inode+0x70a/0x10d0 fs/fs-writeback.c:1745
 writeback_sb_inodes+0x820/0x1360 fs/fs-writeback.c:1976
 __writeback_inodes_wb+0x11b/0x260 fs/fs-writeback.c:2047
 wb_writeback+0x427/0xb80 fs/fs-writeback.c:2158
 wb_check_background_flush fs/fs-writeback.c:2228 [inline]
 wb_do_writeback fs/fs-writeback.c:2316 [inline]
 wb_workfn+0xc4b/0x1080 fs/fs-writeback.c:2343
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xa68/0x1840 kernel/workqueue.c:3317
 worker_thread+0x870/0xd30 kernel/workqueue.c:3398
 kthread+0x7ab/0x920 kernel/kthread.c:464
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
INFO: task syz.5.9087:28950 blocked for more than 143 seconds.
      Not tainted 6.13.0-syzkaller-07632-gaa22f4da2a46 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.9087      state:D stack:23408 pid:28950 tgid:28949 ppid:5835   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5377 [inline]
 __schedule+0x186c/0x4be0 kernel/sched/core.c:6764
 __schedule_loop kernel/sched/core.c:6841 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6856
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6913
 __mutex_lock_common kernel/locking/mutex.c:662 [inline]
 __mutex_lock+0x817/0x1010 kernel/locking/mutex.c:730
 hfs_find_init+0x16e/0x1f0
 hfs_ext_read_extent fs/hfs/extent.c:200 [inline]
 hfs_extend_file+0x31b/0x1450 fs/hfs/extent.c:401
 hfs_bmap_reserve+0xd9/0x400 fs/hfs/btree.c:234
 __hfs_ext_write_extent+0x22e/0x4f0 fs/hfs/extent.c:121
 __hfs_ext_cache_extent+0x6a/0x990 fs/hfs/extent.c:174
 hfs_ext_read_extent fs/hfs/extent.c:202 [inline]
 hfs_extend_file+0x344/0x1450 fs/hfs/extent.c:401
 hfs_get_block+0x3e4/0xb60 fs/hfs/extent.c:353
 __block_write_begin_int+0x694/0x19a0 fs/buffer.c:2116
 block_write_begin fs/buffer.c:2226 [inline]
 cont_write_begin+0x77f/0xb40 fs/buffer.c:2577
 hfs_write_begin+0x68/0xb0 fs/hfs/inode.c:52
 cont_expand_zero fs/buffer.c:2504 [inline]
 cont_write_begin+0x32d/0xb40 fs/buffer.c:2567
 hfs_write_begin+0x68/0xb0 fs/hfs/inode.c:52
 generic_perform_write+0x348/0x990 mm/filemap.c:4132
 generic_file_write_iter+0xae/0x310 mm/filemap.c:4259
 do_iter_readv_writev+0x71c/0x9d0
 vfs_writev+0x38b/0xbc0 fs/read_write.c:1050
 do_pwritev fs/read_write.c:1146 [inline]
 __do_sys_pwritev2 fs/read_write.c:1204 [inline]
 __se_sys_pwritev2+0x196/0x2b0 fs/read_write.c:1195
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0a8178cd29
RSP: 002b:00007f0a82649038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007f0a819a5fa0 RCX: 00007f0a8178cd29
RDX: 0000000000000002 RSI: 0000000020000040 RDI: 0000000000000004
RBP: 00007f0a8180e2a0 R08: 0000000000100000 R09: 0000000000000001
R10: 0000000001000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0a819a5fa0 R15: 00007ffd6c60e5f8
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-syzkaller-07632-gaa22f4da2a46 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
 watchdog+0xff6/0x1040 kernel/hung_task.c:397
 kthread+0x7ab/0x920 kernel/kthread.c:464
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 18352 Comm: kworker/u8:24 Not tainted 6.13.0-syzkaller-07632-gaa22f4da2a46 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: writeback wb_workfn
RIP: 0010:sched_clock+0x4/0x70 arch/x86/kernel/tsc.c:284
Code: 10 9b f4 8b 48 39 c8 0f 94 c0 e9 82 2b b0 ff 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa <55> 41 56 53 e8 83 62 5f 00 65 ff 05 54 c0 a3 7e e8 57 86 94 0a 49
RSP: 0018:ffffc90000007e38 EFLAGS: 00000012
RAX: f3f3f300f1f1f1f1 RBX: ffffffff8e310b50 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffffff8c602940 RDI: 0000000000000000
RBP: ffffc90000007f10 R08: ffffffff901b8b77 R09: 1ffffffff203716e
R10: dffffc0000000000 R11: fffffbfff203716f R12: ffffc90000007ea0
R13: 1ffff92000000fd0 R14: dffffc0000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffc57a6b18 CR3: 000000004e5fc000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 sched_clock_cpu+0x76/0x490 kernel/sched/clock.c:394
 irqtime_account_irq+0x68/0x1d0 kernel/sched/cputime.c:64
 account_hardirq_exit include/linux/vtime.h:154 [inline]
 __irq_exit_rcu+0xba/0x220 kernel/softirq.c:659
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 5a 74 a3 f5 48 89 df e8 92 bb a4 f5 e8 cd 9f cf f5 fb bf 01 00 00 00 <e8> 52 1c 96 f5 65 8b 05 43 44 0c 74 85 c0 74 06 5b e9 3c af 18 f5
RSP: 0018:ffffc9000b71fb10 EFLAGS: 00000282
RAX: 8df162bc89e0fe00 RBX: ffff88801ac98000 RCX: ffffffff81c7307c
RDX: dffffc0000000000 RSI: ffffffff8c602940 RDI: 0000000000000001
RBP: ffffc9000b71fd20 R08: ffffffff901b8b77 R09: 1ffffffff203716e
R10: dffffc0000000000 R11: fffffbfff203716f R12: ffff8880286823c0
R13: dffffc0000000000 R14: ffff888140451408 R15: 0000000002000000
 process_one_work kernel/workqueue.c:3205 [inline]
 process_scheduled_works+0x85c/0x1840 kernel/workqueue.c:3317
 worker_thread+0x870/0xd30 kernel/workqueue.c:3398
 kthread+0x7ab/0x920 kernel/kthread.c:464
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>