INFO: rcu_preempt detected stalls on CPUs/tasks: Tasks blocked on level-0 rcu_node (CPUs 0-1): P3375 (detected by 0, t=10502 jiffies, g=43102, c=43101, q=88260) blkid R running task 27480 3375 9476 0x00000004 0000000000000087 ffff8800321a2f80 ffff8800307f9600 ffff8801db71ffc0 ffff880097cb97c0 ffff8801db71ffd8 ffff88005740f208 ffffffff8280a1de 1ffffffff063fa28 0000000000000000 01ffffff81bbc38c ffff8801db7208b0 Call Trace: [<00000000c33bb8d4>] preempt_schedule_irq+0x5e/0xa0 kernel/sched/core.c:3704 [<000000000201e6c2>] retint_kernel+0x1b/0x2d [<000000009d2c402a>] vprintk_emit+0x43f/0x6f0 kernel/printk/printk.c:1860 [<00000000f34157bf>] vprintk+0x28/0x30 kernel/printk/printk.c:1870 [<00000000b981cb8e>] vprintk_func kernel/printk/internal.h:36 [inline] [<00000000b981cb8e>] printk+0xc2/0xf5 kernel/printk/printk.c:1932 [<000000008cf469a2>] lowmem_scan.cold+0x17b/0x323 drivers/staging/android/lowmemorykiller.c:315 [<00000000413a767b>] do_shrink_slab mm/vmscan.c:399 [inline] [<00000000413a767b>] shrink_slab.part.0+0x3cf/0xa20 mm/vmscan.c:502 [<00000000e777a49e>] shrink_slab mm/vmscan.c:466 [inline] [<00000000e777a49e>] shrink_node+0x1ed/0x750 mm/vmscan.c:2604 [<0000000095df8542>] shrink_zones mm/vmscan.c:2751 [inline] [<0000000095df8542>] do_try_to_free_pages mm/vmscan.c:2793 [inline] [<0000000095df8542>] try_to_free_pages+0x397/0xbd0 mm/vmscan.c:3004 [<0000000068345f1c>] __perform_reclaim mm/page_alloc.c:3332 [inline] [<0000000068345f1c>] __alloc_pages_direct_reclaim mm/page_alloc.c:3354 [inline] [<0000000068345f1c>] __alloc_pages_slowpath mm/page_alloc.c:3704 [inline] [<0000000068345f1c>] __alloc_pages_nodemask+0x930/0x1a80 mm/page_alloc.c:3861 [<000000001a0b4c07>] __alloc_pages include/linux/gfp.h:456 [inline] [<000000001a0b4c07>] __alloc_pages_node include/linux/gfp.h:469 [inline] [<000000001a0b4c07>] alloc_slab_page mm/slub.c:1408 [inline] [<000000001a0b4c07>] allocate_slab mm/slub.c:1557 [inline] [<000000001a0b4c07>] new_slab+0x33b/0x3e0 mm/slub.c:1635 [<00000000f547727a>] new_slab_objects mm/slub.c:2419 [inline] [<00000000f547727a>] ___slab_alloc.constprop.0+0x361/0x470 mm/slub.c:2576 [<00000000ff6d32d1>] __slab_alloc.isra.0.constprop.0+0x50/0xa0 mm/slub.c:2618 [<0000000093aa9057>] slab_alloc_node mm/slub.c:2681 [inline] [<0000000093aa9057>] slab_alloc mm/slub.c:2723 [inline] [<0000000093aa9057>] kmem_cache_alloc+0x212/0x2b0 mm/slub.c:2728 [<000000003cd2c85d>] getname_flags+0xcc/0x550 fs/namei.c:137 [<000000002135df81>] user_path_at_empty+0x2f/0x50 fs/namei.c:2619 [<000000005444df62>] user_path_at include/linux/namei.h:55 [inline] [<000000005444df62>] vfs_fstatat+0xc6/0x170 fs/stat.c:106 [<00000000e8448b27>] SYSC_newfstatat fs/stat.c:297 [inline] [<00000000e8448b27>] SyS_newfstatat+0x9d/0x110 fs/stat.c:291 [<00000000609057d3>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<0000000041394250>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb blkid R running task 27480 3375 9476 0x00000004 0000000000000087 ffff8800321a2f80 ffff8800307f9600 ffff8801db71ffc0 ffff880097cb97c0 ffff8801db71ffd8 ffff88005740f208 ffffffff8280a1de 1ffffffff063fa28 0000000000000000 01ffffff81bbc38c ffff8801db7208b0 Call Trace: [<00000000c33bb8d4>] preempt_schedule_irq+0x5e/0xa0 kernel/sched/core.c:3704 [<000000000201e6c2>] retint_kernel+0x1b/0x2d [<000000009d2c402a>] vprintk_emit+0x43f/0x6f0 kernel/printk/printk.c:1860 [<00000000f34157bf>] vprintk+0x28/0x30 kernel/printk/printk.c:1870 [<00000000b981cb8e>] vprintk_func kernel/printk/internal.h:36 [inline] [<00000000b981cb8e>] printk+0xc2/0xf5 kernel/printk/printk.c:1932 [<000000008cf469a2>] lowmem_scan.cold+0x17b/0x323 drivers/staging/android/lowmemorykiller.c:315 [<00000000413a767b>] do_shrink_slab mm/vmscan.c:399 [inline] [<00000000413a767b>] shrink_slab.part.0+0x3cf/0xa20 mm/vmscan.c:502 [<00000000e777a49e>] shrink_slab mm/vmscan.c:466 [inline] [<00000000e777a49e>] shrink_node+0x1ed/0x750 mm/vmscan.c:2604 [<0000000095df8542>] shrink_zones mm/vmscan.c:2751 [inline] [<0000000095df8542>] do_try_to_free_pages mm/vmscan.c:2793 [inline] [<0000000095df8542>] try_to_free_pages+0x397/0xbd0 mm/vmscan.c:3004 [<0000000068345f1c>] __perform_reclaim mm/page_alloc.c:3332 [inline] [<0000000068345f1c>] __alloc_pages_direct_reclaim mm/page_alloc.c:3354 [inline] [<0000000068345f1c>] __alloc_pages_slowpath mm/page_alloc.c:3704 [inline] [<0000000068345f1c>] __alloc_pages_nodemask+0x930/0x1a80 mm/page_alloc.c:3861 [<000000001a0b4c07>] __alloc_pages include/linux/gfp.h:456 [inline] [<000000001a0b4c07>] __alloc_pages_node include/linux/gfp.h:469 [inline] [<000000001a0b4c07>] alloc_slab_page mm/slub.c:1408 [inline] [<000000001a0b4c07>] allocate_slab mm/slub.c:1557 [inline] [<000000001a0b4c07>] new_slab+0x33b/0x3e0 mm/slub.c:1635 [<00000000f547727a>] new_slab_objects mm/slub.c:2419 [inline] [<00000000f547727a>] ___slab_alloc.constprop.0+0x361/0x470 mm/slub.c:2576 [<00000000ff6d32d1>] __slab_alloc.isra.0.constprop.0+0x50/0xa0 mm/slub.c:2618 [<0000000093aa9057>] slab_alloc_node mm/slub.c:2681 [inline] [<0000000093aa9057>] slab_alloc mm/slub.c:2723 [inline] [<0000000093aa9057>] kmem_cache_alloc+0x212/0x2b0 mm/slub.c:2728 [<000000003cd2c85d>] getname_flags+0xcc/0x550 fs/namei.c:137 [<000000002135df81>] user_path_at_empty+0x2f/0x50 fs/namei.c:2619 [<000000005444df62>] user_path_at include/linux/namei.h:55 [inline] [<000000005444df62>] vfs_fstatat+0xc6/0x170 fs/stat.c:106 [<00000000e8448b27>] SYSC_newfstatat fs/stat.c:297 [inline] [<00000000e8448b27>] SyS_newfstatat+0x9d/0x110 fs/stat.c:291 [<00000000609057d3>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<0000000041394250>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb lowmemorykiller: Killing 'syz-executor.0' (8266) (tgid 8266), adj 1000, to free 52408kB on behalf of 'kswapd0' (33) because cache 17164kB is below limit 65536kB for oom_score_adj 12 Free memory is 65412kB above reserved lowmemorykiller: Killing 'syz-executor.1' (8253) (tgid 8253), adj 1000, to free 43120kB on behalf of 'kswapd0' (33) because cache 17164kB is below limit 65536kB for oom_score_adj 12 Free memory is 65164kB above reserved lowmemorykiller: Killing 'syz-executor.3' (8286) (tgid 8286), adj 1000, to free 43864kB on behalf of 'kswapd0' (33) because cache 20868kB is below limit 65536kB for oom_score_adj 12 Free memory is 45936kB above reserved lowmemorykiller: Killing 'syz-executor.1' (8273) (tgid 8253), adj 1000, to free 43400kB on behalf of 'kswapd0' (33) because cache 21904kB is below limit 65536kB for oom_score_adj 12 Free memory is 44928kB above reserved lowmemorykiller: Killing 'syz-executor.1' (8270) (tgid 8270), adj 1000, to free 43400kB on behalf of 'syz-executor.2' (8278) because cache 24712kB is below limit 65536kB for oom_score_adj 12 Free memory is 56704kB above reserved