INFO: task kcompactd0:30 blocked for more than 143 seconds.
Not tainted 5.16.0-rc2-next-20211125-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kcompactd0 state:D stack:27272 pid: 30 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4983 [inline]
__schedule+0xab2/0x4d90 kernel/sched/core.c:6293
schedule+0xd2/0x260 kernel/sched/core.c:6366
io_schedule+0xee/0x170 kernel/sched/core.c:8411
folio_wait_bit_common+0x4f2/0xa90 mm/filemap.c:1372
lock_page include/linux/pagemap.h:796 [inline]
__unmap_and_move mm/migrate.c:970 [inline]
unmap_and_move mm/migrate.c:1253 [inline]
migrate_pages+0x8f1/0x52e0 mm/migrate.c:1536
compact_zone+0x1ada/0x3880 mm/compaction.c:2400
kcompactd_do_work+0x2c9/0x730 mm/compaction.c:2840
kcompactd+0x86b/0xf30 mm/compaction.c:2942
kthread+0x405/0x4f0 kernel/kthread.c:345
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task syz-executor.1:5837 can't die for more than 144 seconds.
task:syz-executor.1 state:R running task stack:24424 pid: 5837 ppid: 31280 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:4983 [inline]
__schedule+0xab2/0x4d90 kernel/sched/core.c:6293
Showing all locks held in the system:
1 lock held by systemd/1:
#0: ffff88801a494b58 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline]
#0: ffff88801a494b58 (mapping.invalidate_lock){++++}-{3:3}, at: page_cache_ra_unbounded+0x1ae/0x780 mm/readahead.c:194
1 lock held by khungtaskd/27:
#0: ffffffff8bb83220 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
2 locks held by kswapd0/98:
1 lock held by kswapd1/99:
1 lock held by systemd-journal/2963:
#0: ffff888021e91980 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline]
#0: ffff888021e91980 (mapping.invalidate_lock){++++}-{3:3}, at: page_cache_ra_unbounded+0x1ae/0x780 mm/readahead.c:194
1 lock held by systemd-timesyn/3055:
1 lock held by in:imklog/6216:
1 lock held by cron/6220:
2 locks held by agetty/6230:
#0: ffff88801cc34098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc900029182e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
1 lock held by syz-fuzzer/6501:
2 locks held by syz-fuzzer/6520:
2 locks held by kworker/u4:14/19411:
3 locks held by kworker/0:14/20252:
#0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
#0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2270
#1: ffffc90003bd7db0 ((work_completion)(&(&krcp->page_cache_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2274
#2: ffffffff8bcaa0a8 (pcpu_drain_mutex){+.+.}-{3:3}, at: __drain_all_pages+0x4f/0x6c0 mm/page_alloc.c:3196
3 locks held by kworker/1:10/26165:
1 lock held by systemd-udevd/5301:
1 lock held by syz-executor.1/5837:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc2-next-20211125-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:256 [inline]
watchdog+0xcb7/0xed0 kernel/hung_task.c:413
kthread+0x405/0x4f0 kernel/kthread.c:345
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: 6501 Comm: syz-fuzzer Not tainted 5.16.0-rc2-next-20211125-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0xc/0x70 kernel/kcov.c:293
Code: 4c 38 f0 48 c7 44 38 e0 05 00 00 00 48 89 74 38 e8 4e 89 54 c8 20 48 89 10 c3 0f 1f 40 00 49 89 f8 bf 03 00 00 00 4c 8b 14 24 <48> 89 f1 65 48 8b 34 25 40 70 02 00 e8 a3 f8 ff ff 84 c0 74 48 48
RSP: 0000:ffffc90001a5efd0 EFLAGS: 00000046
RAX: 1ffffd4000dc7ab1 RBX: ffffea0006e3d588 RCX: 0000000000000000
RDX: ffff88801a0b8000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffea0006e3d587
R10: ffffffff81a44f5f R11: 0000000000000000 R12: ffff888010e6c000
R13: dead000000000100 R14: dffffc0000000000 R15: ffffea0006e3d580
FS: 000000c00002e090(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559887f16140 CR3: 000000007196b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 00000000b8fecd19 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
_compound_head include/linux/page-flags.h:268 [inline]
add_page_to_lru_list include/linux/mm_inline.h:106 [inline]
move_pages_to_lru+0x93f/0x1d40 mm/vmscan.c:2316
shrink_inactive_list mm/vmscan.c:2397 [inline]
shrink_list mm/vmscan.c:2621 [inline]
shrink_lruvec+0xcb4/0x2660 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+0x491/0x1620 mm/vmscan.c:3541
try_to_free_pages+0x29f/0x750 mm/vmscan.c:3776
__perform_reclaim mm/page_alloc.c:4603 [inline]
__alloc_pages_direct_reclaim mm/page_alloc.c:4624 [inline]
__alloc_pages_slowpath.constprop.0+0xa9e/0x2080 mm/page_alloc.c:5014
__alloc_pages+0x412/0x500 mm/page_alloc.c:5389
alloc_pages+0x1a7/0x300 mm/mempolicy.c:2192
folio_alloc+0x1c/0x70 mm/mempolicy.c:2202
filemap_alloc_folio+0x8e/0xb0 mm/filemap.c:1037
__page_cache_alloc include/linux/pagemap.h:374 [inline]
page_cache_ra_unbounded+0x365/0x780 mm/readahead.c:215
do_page_cache_ra+0xf9/0x140 mm/readahead.c:268
do_sync_mmap_readahead mm/filemap.c:3084 [inline]
filemap_fault+0x157f/0x21c0 mm/filemap.c:3177
__do_fault+0x10d/0x790 mm/memory.c:3845
do_read_fault mm/memory.c:4160 [inline]
do_fault mm/memory.c:4289 [inline]
handle_pte_fault mm/memory.c:4547 [inline]
__handle_mm_fault+0x2771/0x4170 mm/memory.c:4682
handle_mm_fault+0x1c8/0x790 mm/memory.c:4780
do_user_addr_fault+0x489/0x11c0 arch/x86/mm/fault.c:1397
handle_page_fault arch/x86/mm/fault.c:1484 [inline]
exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1540
asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0033:0x43ad00
Code: Unable to access opcode bytes at RIP 0x43acd6.
RSP: 002b:000000c00003ded0 EFLAGS: 00010206
RAX: 0000000100000004 RBX: 0000000000000000 RCX: 000000c000000600
RDX: 000000c000000600 RSI: 0000000000000000 RDI: 00000249903cdb01
RBP: 000000c00003df28 R08: 00000000003b6a72 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 000000000043b6e0
R13: 0000000000000000 R14: 00000000008db9a0 R15: 0000000000000000
----------------
Code disassembly (best guess):
0: 4c 38 f0 rex.WR cmp %r14b,%al
3: 48 c7 44 38 e0 05 00 movq $0x5,-0x20(%rax,%rdi,1)
a: 00 00
c: 48 89 74 38 e8 mov %rsi,-0x18(%rax,%rdi,1)
11: 4e 89 54 c8 20 mov %r10,0x20(%rax,%r9,8)
16: 48 89 10 mov %rdx,(%rax)
19: c3 retq
1a: 0f 1f 40 00 nopl 0x0(%rax)
1e: 49 89 f8 mov %rdi,%r8
21: bf 03 00 00 00 mov $0x3,%edi
26: 4c 8b 14 24 mov (%rsp),%r10
* 2a: 48 89 f1 mov %rsi,%rcx <-- trapping instruction
2d: 65 48 8b 34 25 40 70 mov %gs:0x27040,%rsi
34: 02 00
36: e8 a3 f8 ff ff callq 0xfffff8de
3b: 84 c0 test %al,%al
3d: 74 48 je 0x87
3f: 48 rex.W