INFO: task kcompactd0:1654 blocked for more than 143 seconds. Not tainted 5.13.0-rc2-next-20210518-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kcompactd0 state:D stack:27640 pid: 1654 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:4688 [inline] __schedule+0xb38/0x58c0 kernel/sched/core.c:5945 schedule+0xcf/0x270 kernel/sched/core.c:6024 io_schedule+0xba/0x130 kernel/sched/core.c:8013 wait_on_page_bit_common+0x571/0xea0 mm/filemap.c:1301 lock_page include/linux/pagemap.h:625 [inline] __unmap_and_move mm/migrate.c:1028 [inline] unmap_and_move mm/migrate.c:1178 [inline] migrate_pages+0xa5a/0x3950 mm/migrate.c:1452 compact_zone+0x1ab6/0x3820 mm/compaction.c:2401 kcompactd_do_work+0x2c9/0x730 mm/compaction.c:2816 kcompactd+0x262/0xd10 mm/compaction.c:2911 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task syz-executor.0:1219 can't die for more than 144 seconds. task:syz-executor.0 state:R running task stack:22480 pid: 1219 ppid: 959 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:4688 [inline] __schedule+0xb38/0x58c0 kernel/sched/core.c:5945 Showing all locks held in the system: 1 lock held by khungtaskd/1592: #0: ffffffff8c17afe0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6333 1 lock held by kswapd1/2149: 3 locks held by kworker/1:1H/3144: #0: ffff888011065138 ((wq_completion)events_highpri){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888011065138 ((wq_completion)events_highpri){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff888011065138 ((wq_completion)events_highpri){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff888011065138 ((wq_completion)events_highpri){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff888011065138 ((wq_completion)events_highpri){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888011065138 ((wq_completion)events_highpri){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2246 #1: ffffc90002ae7da8 ((work_completion)(&(&krcp->page_cache_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2250 #2: ffffffff8c29b9c8 (pcpu_drain_mutex){+.+.}-{3:3}, at: __drain_all_pages+0x4f/0x6c0 mm/page_alloc.c:3145 1 lock held by systemd-timesyn/4951: 1 lock held by in:imklog/8155: #0: ffff8880186d65f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990 3 locks held by kworker/0:7/431: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1592 Comm: khungtaskd Not tainted 5.13.0-rc2-next-20210518-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+0x13e/0x1d6 lib/dump_stack.c:129 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 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:254 [inline] watchdog+0xd3b/0xf50 kernel/hung_task.c:339 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4858 Comm: systemd-journal Not tainted 5.13.0-rc2-next-20210518-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:166 [inline] RIP: 0010:unwind_next_frame+0x300/0x1ce0 arch/x86/kernel/unwind_orc.c:443 Code: 14 95 14 bd fd 8e 89 c8 48 8d 3c 40 4c 8d 8c 3f 7c b3 5d 8e 83 c2 01 49 81 f9 14 bd fd 8e 0f 83 f3 10 00 00 89 d7 48 8d 3c 7f <48> 8d bc 3f 7c b3 5d 8e 48 81 ff 14 bd fd 8e 0f 87 d8 10 00 00 48 RSP: 0018:ffffc90000eff8e0 EFLAGS: 00000287 RAX: 000000000002c10b RBX: 1ffff920001dff24 RCX: 000000000002c10b RDX: 000000000002c128 RSI: 000000000000bb16 RDI: 0000000000084378 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8e6e39be R10: fffff520001dff42 R11: 0000000000086087 R12: ffffc90000effa00 R13: ffffc90000eff9ed R14: ffffc90000eff9b8 R15: ffffffff81bb16ba FS: 00007fe088b4d8c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe085f9d000 CR3: 000000001658e000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:431 [inline] __kasan_slab_alloc+0x84/0xa0 mm/kasan/common.c:464 kasan_slab_alloc include/linux/kasan.h:236 [inline] slab_post_alloc_hook mm/slab.h:512 [inline] slab_alloc_node mm/slub.c:2954 [inline] slab_alloc mm/slub.c:2962 [inline] kmem_cache_alloc+0x285/0x4a0 mm/slub.c:2967 getname_flags.part.0+0x50/0x4f0 fs/namei.c:138 getname_flags include/linux/audit.h:319 [inline] getname+0x8e/0xd0 fs/namei.c:209 do_sys_openat2+0xf5/0x420 fs/open.c:1190 do_sys_open fs/open.c:1212 [inline] __do_sys_open fs/open.c:1220 [inline] __se_sys_open fs/open.c:1216 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1216 do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fe0880dc840 Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 RSP: 002b:00007ffebc01d378 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffebc01d680 RCX: 00007fe0880dc840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055ea923ffed0 RBP: 000000000000000d R08: 000000000000ffc0 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 000055ea923f4040 R14: 00007ffebc01d640 R15: 000055ea923ff270