INFO: task kcompactd0:30 blocked for more than 143 seconds.
Not tainted 5.16.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kcompactd0 state:D stack:27528 pid: 30 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
io_schedule+0xee/0x170 kernel/sched/core.c:8371
folio_wait_bit_common+0x4f2/0xa60 mm/filemap.c:1371
lock_page include/linux/pagemap.h:780 [inline]
__unmap_and_move mm/migrate.c:980 [inline]
unmap_and_move mm/migrate.c:1204 [inline]
migrate_pages+0xa5a/0x3810 mm/migrate.c:1481
compact_zone+0x1abb/0x3860 mm/compaction.c:2399
kcompactd_do_work+0x2c9/0x730 mm/compaction.c:2839
kcompactd+0x86b/0xf30 mm/compaction.c:2941
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83b60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by khugepaged/33:
#0: ffffffff8bc68ba8 (lock#5){+.+.}-{3:3}, at: __lru_add_drain_all+0x65/0x760 mm/swap.c:797
1 lock held by kswapd0/94:
2 locks held by kswapd1/97:
1 lock held by systemd-journal/2965:
#0: ffffffff8bca8260 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4585 [inline]
#0: ffffffff8bca8260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline]
#0: ffffffff8bca8260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0xa1e/0x20d0 mm/page_alloc.c:5007
1 lock held by in:imklog/6427:
#0: ffff88807aa0fc70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
4 locks held by rs:main Q:Reg/6428:
#0: ffff8880726025f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
#1: ffff88807ed5a460 (sb_writers#5){.+.+}-{0:0}, at: ksys_write+0x12d/0x250 fs/read_write.c:643
#2: ffff88806e9fabd0 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:783 [inline]
#2: ffff88806e9fabd0 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: ext4_buffered_write_iter+0xb6/0x3b0 fs/ext4/file.c:263
#3: ffffffff8bca8260 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4585 [inline]
#3: ffffffff8bca8260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline]
#3: ffffffff8bca8260 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0xa1e/0x20d0 mm/page_alloc.c:5007
2 locks held by syz-fuzzer/6534:
3 locks held by kworker/0:3/5729:
3 locks held by kworker/1:2/5730:
1 lock held by syz-executor.1/5908:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:295
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5302 Comm: syz-executor.4 Not tainted 5.16.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:set_irq_regs include/asm-generic/irq_regs.h:29 [inline]
RIP: 0010:__sysvec_apic_timer_interrupt+0x22/0x530 arch/x86/kernel/apic/apic.c:1099
Code: ff ff 66 0f 1f 44 00 00 41 54 55 53 48 89 fb 48 c7 c7 a0 98 a8 89 e8 ed 2d 12 08 48 c7 c7 a0 90 a8 89 65 48 8b 2d d6 a8 d1 7e d9 2d 12 08 48 c7 c0 60 2a 56 8b 48 ba 00 00 00 00 00 fc ff df
RSP: 0000:ffffc90000dc0fd8 EFLAGS: 00000002
RAX: 0000000000000001 RBX: ffffc90004607c18 RCX: 1ffff110173a4f0c
RDX: dffffc0000000000 RSI: 0000000000010001 RDI: ffffffff89a890a0
RBP: 0000000000000000 R08: ffffffff8f16a058 R09: ffffffff8f16a04f
R10: ffffffff8f16a057 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 00007fabbc81a700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fabbf2426b5 CR3: 000000015f924000 CR4: 0000000000350ee0
Call Trace:
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 ee f0 15 f8 48 89 ef e8 36 67 16 f8 e8 01 21 37 f8 fb bf 01 00 00 00 06 31 09 f8 65 8b 05 ef b3 bb 76 85 c0 74 02 5d c3 e8 0b 89 b9
RSP: 0000:ffffc90004607cc0 EFLAGS: 00000202
RAX: 000000000b6809f1 RBX: 00007fabbf242ba0 RCX: 1ffffffff1b21f21
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: ffff88816d5c0000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817ddd38 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88816d5c0140 R14: 000000000000000b R15: ffff88816d5c01d8
spin_unlock_irq include/linux/spinlock.h:399 [inline]
get_signal+0x1415/0x2220 kernel/signal.c:2855
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
irqentry_exit_to_user_mode+0x5/0x40 kernel/entry/common.c:313
exc_page_fault+0xc6/0x180 arch/x86/mm/fault.c:1544
asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0033:0x7fabbf24b745
Code: 5d 08 4c 8d 65 0c eb 1c 0f 1f 44 00 00 45 31 c0 31 c9 ba 80 00 00 00 48 89 de bf ca 00 00 00 e8 91 93 05 00 8b 03 85 c0 74 e3 45 08 00 00 00 00 48 89 ef e8 0c fb ff ff 8b 45 0c 85 c0 75 39
RSP: 002b:00007fabbc81a220 EFLAGS: 00010202
RAX: 0000000044ed5001 RBX: 00007fff5744ea3f RCX: 00007fabbf2fffb2
RDX: 00000000000df7be RSI: 0000000000000255 RDI: 00007fabbf30ff5a
RBP: 00007fabbf2426ad R08: 0000000000000171 R09: 000000000000000e
R10: 00007fff57596090 R11: 0000000000055488 R12: 00007fabbf3b7f6c
R13: 00007fff5744ea3f R14: 00007fabbc81a300 R15: 0000000000022000
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
6: 41 54 push %r12
8: 55 push %rbp
9: 53 push %rbx
a: 48 89 fb mov %rdi,%rbx
d: 48 c7 c7 a0 98 a8 89 mov $0xffffffff89a898a0,%rdi
14: e8 ed 2d 12 08 callq 0x8122e06
19: 48 c7 c7 a0 90 a8 89 mov $0xffffffff89a890a0,%rdi
20: 65 48 8b 2d d6 a8 d1 mov %gs:0x7ed1a8d6(%rip),%rbp # 0x7ed1a8fe
27: 7e
* 28: e8 d9 2d 12 08 callq 0x8122e06 <-- trapping instruction
2d: 48 c7 c0 60 2a 56 8b mov $0xffffffff8b562a60,%rax
34: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
3b: fc ff df