INFO: task kcompactd0:30 blocked for more than 143 seconds.
Not tainted 5.15.0-rc7-next-20211029-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kcompactd0 state:D stack:28680 pid: 30 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4984 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6265
schedule+0xd2/0x260 kernel/sched/core.c:6338
io_schedule+0xee/0x170 kernel/sched/core.c:8383
folio_wait_bit_common+0x4f2/0xa60 mm/filemap.c:1371
lock_page include/linux/pagemap.h:747 [inline]
__unmap_and_move mm/migrate.c:980 [inline]
unmap_and_move mm/migrate.c:1204 [inline]
migrate_pages+0xa5a/0x3880 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
INFO: task syz-executor.3:11205 can't die for more than 144 seconds.
task:syz-executor.3 state:R running task stack:26008 pid:11205 ppid: 8616 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:4984 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6265
preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6431
__cond_resched+0x13/0x20 kernel/sched/core.c:8144
_cond_resched include/linux/sched.h:2025 [inline]
shrink_lruvec+0x1078/0x2660 mm/vmscan.c:2945
shrink_node_memcgs mm/vmscan.c:3129 [inline]
shrink_node+0x858/0x1eb0 mm/vmscan.c:3252
shrink_zones mm/vmscan.c:3485 [inline]
do_try_to_free_pages+0x4e2/0x1640 mm/vmscan.c:3541
try_to_free_pages+0x29f/0x750 mm/vmscan.c:3776
__perform_reclaim mm/page_alloc.c:4588 [inline]
__alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline]
__alloc_pages_slowpath.constprop.0+0xac7/0x20d0 mm/page_alloc.c:5007
__alloc_pages+0x412/0x500 mm/page_alloc.c:5382
alloc_pages+0x1a7/0x300 mm/mempolicy.c:2191
folio_alloc+0x1c/0x70 mm/mempolicy.c:2283
filemap_alloc_folio+0x8e/0xb0 mm/filemap.c:1036
__page_cache_alloc include/linux/pagemap.h:325 [inline]
page_cache_ra_unbounded+0x36a/0x940 mm/readahead.c:215
do_page_cache_ra+0xf9/0x140 mm/readahead.c:268
do_sync_mmap_readahead mm/filemap.c:2996 [inline]
filemap_fault+0x1562/0x26d0 mm/filemap.c:3089
__do_fault+0x10d/0x4d0 mm/memory.c:3853
do_cow_fault mm/memory.c:4198 [inline]
do_fault mm/memory.c:4299 [inline]
handle_pte_fault mm/memory.c:4555 [inline]
__handle_mm_fault+0x370e/0x5120 mm/memory.c:4690
handle_mm_fault+0x1c8/0x790 mm/memory.c:4788
do_user_addr_fault+0x489/0x11c0 arch/x86/mm/fault.c:1397
handle_page_fault arch/x86/mm/fault.c:1485 [inline]
exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1541
asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0033:0x7f5ac0039f3a
RSP: 002b:00007ffdd6fc5be0 EFLAGS: 00010246
RAX: 0000000020000880 RBX: 00007f5ac05b0000 RCX: 0000000000000000
RDX: 11b004778ee15df8 RSI: 000000000000001b RDI: 000055555735e2f0
RBP: 00007ffdd6fc5cd8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000004 R11: 000000009ed3e91a R12: 0000000000303f35
R13: 00000000000003e8 R14: 00007f5ac01abf60 R15: 0000000000303f1f
Showing all locks held in the system:
1 lock held by systemd/1:
#0: ffffffff8b8a7e80 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4585 [inline]
#0: ffffffff8b8a7e80 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline]
#0: ffffffff8b8a7e80 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0xa1e/0x20d0 mm/page_alloc.c:5007
1 lock held by khungtaskd/27:
#0: ffffffff8b7839a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by khugepaged/33:
1 lock held by kswapd1/99:
1 lock held by systemd-journal/2925:
1 lock held by systemd-udevd/2942:
1 lock held by in:imklog/6166:
4 locks held by rs:main Q:Reg/6167:
#0: ffff8880125f34f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
#1: ffff88814b09e460 (sb_writers#5){.+.+}-{0:0}, at: ksys_write+0x12d/0x250 fs/read_write.c:643
#2: ffff88807e58abd0 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: inode_lock include/linux/fs.h:783 [inline]
#2: ffff88807e58abd0 (&sb->s_type->i_mutex_key#10){++++}-{3:3}, at: ext4_buffered_write_iter+0xb6/0x3b0 fs/ext4/file.c:263
#3: ffffffff8b8a7e80 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4585 [inline]
#3: ffffffff8b8a7e80 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline]
#3: ffffffff8b8a7e80 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0xa1e/0x20d0 mm/page_alloc.c:5007
1 lock held by syz-fuzzer/6483:
3 locks held by kworker/1:0/13650:
6 locks held by kworker/u4:8/4072:
1 lock held by systemd-udevd/9904:
2 locks held by syz-executor.3/11205:
1 lock held by systemd-cgroups/11276:
2 locks held by kworker/u4:0/11281:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-rc7-next-20211029-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:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:254 [inline]
watchdog+0xcb7/0xed0 kernel/hung_task.c:339
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2942 Comm: systemd-udevd Not tainted 5.15.0-rc7-next-20211029-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:match_held_lock+0x70/0xc0 kernel/locking/lockdep.c:5116
Code: 06 48 0f af c2 0f b7 53 20 81 e2 ff 1f 00 00 48 39 d0 0f 94 c0 48 83 c4 08 0f b6 c0 5b c3 31 f6 e8 c5 fe ff ff 48 85 c0 75 b2 <31> c0 48 83 c4 08 5b c3 48 83 c4 08 b8 01 00 00 00 5b c3 e8 c8 ac
RSP: 0018:ffffc90000007c08 EFLAGS: 00000046
RAX: 000000000000000a RBX: ffff88801c48e278 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8b7838e0 RDI: ffff88801c48e278
RBP: ffffffff8b7838e0 R08: 0000000000000000 R09: ffffffff8d46b617
R10: fffffbfff1a8d6c2 R11: 0000000000000007 R12: ffff88801c48d7c0
R13: ffff88801c48e228 R14: 00000000ffffffff R15: ffff88801c48e278
FS: 00007f83eaf158c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdd54012e10 CR3: 000000007b9eb000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000006
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
__lock_is_held kernel/locking/lockdep.c:5380 [inline]
lock_is_held_type+0xa7/0x140 kernel/locking/lockdep.c:5680
lock_is_held include/linux/lockdep.h:283 [inline]
rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:125
trace_sched_util_est_cfs_tp include/trace/events/sched.h:723 [inline]
trace_sched_util_est_cfs_tp include/trace/events/sched.h:723 [inline]
util_est_enqueue kernel/sched/fair.c:3953 [inline]
enqueue_task_fair+0xec2/0x1bc0 kernel/sched/fair.c:5574
enqueue_task kernel/sched/core.c:1999 [inline]
activate_task kernel/sched/core.c:2024 [inline]
ttwu_do_activate+0x1d9/0x7b0 kernel/sched/core.c:3600
ttwu_queue kernel/sched/core.c:3793 [inline]
try_to_wake_up+0x508/0x15a0 kernel/sched/core.c:4116
hrtimer_wakeup+0x43/0x60 kernel/time/hrtimer.c:1939
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
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:free_unref_page_list+0x7fe/0xfa0 mm/page_alloc.c:3471
Code: d8 a2 b4 81 4c 89 e7 e8 80 35 a8 ff 48 85 ed 0f 85 d1 02 00 00 9c 58 f6 c4 02 0f 85 e4 02 00 00 48 85 ed 74 01 fb 48 83 c4 20 <5b> 5d 41 5c 41 5d 41 5e 41 5f c3 e8 e2 c8 62 07 85 c0 0f 84 a9 fc
RSP: 0018:ffffc90002816ec0 EFLAGS: 00000286
RAX: 0000000000000006 RBX: 0000000000000000 RCX: 1ffffffff1f505ae
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000200 R08: 0000000000000001 R09: ffffffff8fa48a9f
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880b9c35620
R13: ffff8880b9c35648 R14: ffffc90002817020 R15: ffffc90002817018
shrink_page_list+0x406d/0x6730 mm/vmscan.c:1916
shrink_inactive_list mm/vmscan.c:2394 [inline]
shrink_list mm/vmscan.c:2621 [inline]
shrink_lruvec+0xc9b/0x2660 mm/vmscan.c:2940
shrink_node_memcgs mm/vmscan.c:3129 [inline]
shrink_node+0x858/0x1eb0 mm/vmscan.c:3252
shrink_zones mm/vmscan.c:3485 [inline]
do_try_to_free_pages+0x4e2/0x1640 mm/vmscan.c:3541
try_to_free_pages+0x29f/0x750 mm/vmscan.c:3776
__perform_reclaim mm/page_alloc.c:4588 [inline]
__alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline]
__alloc_pages_slowpath.constprop.0+0xac7/0x20d0 mm/page_alloc.c:5007
__alloc_pages+0x412/0x500 mm/page_alloc.c:5382
alloc_pages+0x1a7/0x300 mm/mempolicy.c:2191
folio_alloc+0x1c/0x70 mm/mempolicy.c:2283
filemap_alloc_folio+0x8e/0xb0 mm/filemap.c:1036
__page_cache_alloc include/linux/pagemap.h:325 [inline]
page_cache_ra_unbounded+0x36a/0x940 mm/readahead.c:215
do_page_cache_ra+0xf9/0x140 mm/readahead.c:268
do_sync_mmap_readahead mm/filemap.c:2996 [inline]
filemap_fault+0x1562/0x26d0 mm/filemap.c:3089
__do_fault+0x10d/0x4d0 mm/memory.c:3853
do_read_fault mm/memory.c:4168 [inline]
do_fault mm/memory.c:4297 [inline]
handle_pte_fault mm/memory.c:4555 [inline]
__handle_mm_fault+0x28e8/0x5120 mm/memory.c:4690
handle_mm_fault+0x1c8/0x790 mm/memory.c:4788
do_user_addr_fault+0x489/0x11c0 arch/x86/mm/fault.c:1397
handle_page_fault arch/x86/mm/fault.c:1485 [inline]
exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1541
asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0033:0x55632a73c1b0
Code: Unable to access opcode bytes at RIP 0x55632a73c186.
RSP: 002b:00007ffd57058848 EFLAGS: 00010287
RAX: 00000000c5c966a6 RBX: 000055632be41850 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000100 RDI: 000055632a745bf6
RBP: 00007ffd570589e0 R08: 0000000000000cfd R09: 00007ffd571e6080
R10: 00007ffd571e60f0 R11: 00000000000a049e R12: 000055632be53a20
R13: 0000000000000001 R14: 00007ffd5705885c R15: 00007ffd5705885c
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 48 0f af c2 imul %rdx,%rax
4: 0f b7 53 20 movzwl 0x20(%rbx),%edx
8: 81 e2 ff 1f 00 00 and $0x1fff,%edx
e: 48 39 d0 cmp %rdx,%rax
11: 0f 94 c0 sete %al
14: 48 83 c4 08 add $0x8,%rsp
18: 0f b6 c0 movzbl %al,%eax
1b: 5b pop %rbx
1c: c3 retq
1d: 31 f6 xor %esi,%esi
1f: e8 c5 fe ff ff callq 0xfffffee9
24: 48 85 c0 test %rax,%rax
27: 75 b2 jne 0xffffffdb
* 29: 31 c0 xor %eax,%eax <-- trapping instruction
2b: 48 83 c4 08 add $0x8,%rsp
2f: 5b pop %rbx
30: c3 retq
31: 48 83 c4 08 add $0x8,%rsp
35: b8 01 00 00 00 mov $0x1,%eax
3a: 5b pop %rbx
3b: c3 retq
3c: e8 .byte 0xe8
3d: c8 .byte 0xc8
3e: ac lods %ds:(%rsi),%al