Free memory is 1688kB above reserved lowmemorykiller: Killing 'syz-executor.2' (3441) (tgid 3441), adj 1000, to free 35348kB on behalf of 'syz-executor.2' (3522) because cache 404kB is below limit 6144kB for oom_score_adj 0 Free memory is 1688kB above reserved INFO: task cron:1977 blocked for more than 140 seconds. Not tainted 4.4.174+ #4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. cron D lowmemorykiller: Killing 'syz-executor.2' (3441) (tgid 3441), adj 1000, to free 35348kB on behalf of 'syz-executor.2' (3559) because cache 404kB is below limit 6144kB for oom_score_adj 0 Free memory is 1688kB above reserved lowmemorykiller: Killing 'syz-executor.2' (3441) (tgid 3441), adj 1000, to free 35348kB on behalf of 'syz-executor.4' (1817) because cache 404kB is below limit 6144kB for oom_score_adj 0 Free memory is 1688kB above reserved ffff8801d67578d8 25088 1977 1 0x00000000 ffff8801d67578d8 ffff8801d66dc740 2d46e947e5f41160 ffff8801d66dc740 0000000000000000 ffff8801d66dd000 ffff8801db71f180 ffff8801db71f1a8 ffff8801db71e898 ffff8801d7668000 ffff8801d66dc740 ffffed003acea001 Call Trace: [] schedule+0x99/0x1d0 kernel/sched/core.c:3355 [] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3388 [] __mutex_lock_common kernel/locking/mutex.c:582 [inline] [] mutex_lock_nested+0x3c2/0xb80 kernel/locking/mutex.c:621 [] lookup_slow fs/namei.c:1693 [inline] [] walk_component+0x8a2/0x1000 fs/namei.c:1806 [] lookup_last fs/namei.c:2178 [inline] [] path_lookupat.isra.0+0x18f/0x3f0 fs/namei.c:2195 [] filename_lookup+0x1a4/0x3b0 fs/namei.c:2229 [] user_path_at_empty+0x43/0x50 fs/namei.c:2403 [] user_path_at include/linux/namei.h:52 [inline] [] vfs_fstatat+0xc6/0x170 fs/stat.c:106 [] vfs_stat fs/stat.c:123 [inline] [] SYSC_newstat fs/stat.c:270 [inline] [] SyS_newstat+0x94/0x100 fs/stat.c:266 [] entry_SYSCALL_64_fastpath+0x1e/0x9a lowmemorykiller: Killing 'syz-executor.2' (3441) (tgid 3441), adj 1000, to free 35348kB on behalf of 'syz-fuzzer' (2091) because cache 404kB is below limit 6144kB for oom_score_adj 0 Free memory is 1672kB above reserved lowmemorykiller: Killing 'syz-executor.2' (3441) (tgid 3441), adj 1000, to free 35348kB on behalf of 'syz-executor.2' (3447) because cache 404kB is below limit 6144kB for oom_score_adj 0 Free memory is 1672kB above reserved lowmemorykiller: Killing 'syz-executor.2' (3441) (tgid 3441), adj 1000, to free 35348kB on behalf of 'syz-executor.2' (3430) because cache 648kB is below limit 6144kB for oom_score_adj 0 Free memory is 1672kB above reserved lowmemorykiller: Killing 'syz-executor.2' (3441) (tgid 3441), adj 1000, to free 35348kB on behalf of 'syz-executor.2' (3479) because cache 648kB is below limit 6144kB for oom_score_adj 0 Free memory is 1672kB above reserved lowmemorykiller: Killing 'syz-executor.2' (3441) (tgid 3441), adj 1000, to free 35348kB on behalf of 'syz-executor.2' (3572) because cache 648kB is below limit 6144kB for oom_score_adj 0 Free memory is 1672kB above reserved lowmemorykiller: Killing 'syz-executor.2' (3441) (tgid 3441), adj 1000, to free 35348kB on behalf of 'syz-executor.2' (3543) because cache 648kB is below limit 6144kB for oom_score_adj 0 Free memory is 1672kB above reserved lowmemorykiller: Killing 'syz-executor.2' (3441) (tgid 3441), adj 1000, to free 35348kB on behalf of 'syz-executor.2' (3082) because cache 648kB is below limit 6144kB for oom_score_adj 0 Free memory is 1672kB above reserved lowmemorykiller: Killing 'syz-executor.2' (3441) (tgid 3441), adj 1000, to free 35348kB on behalf of 'syz-executor.2' (3530) because cache 648kB is below limit 6144kB for oom_score_adj 0 Free memory is 1672kB above reserved 1 lock held by cron/1977: #0: (&type->i_mutex_dir_key#3){+.+.+.}, at: [] lookup_slow fs/namei.c:1693 [inline] #0: (&type->i_mutex_dir_key#3){+.+.+.}, at: [] walk_component+0x8a2/0x1000 fs/namei.c:1806 Sending NMI to all CPUs: NMI backtrace for cpu 0 CPU: 0 PID: 20 Comm: khungtaskd Not tainted 4.4.174+ #4 task: ffff8801da6c2f80 task.stack: ffff8800001c0000 RIP: 0010:[] [] _flat_send_IPI_mask arch/x86/kernel/apic/apic_flat_64.c:62 [inline] RIP: 0010:[] [] flat_send_IPI_mask+0xf7/0x1b0 arch/x86/kernel/apic/apic_flat_64.c:69 RSP: 0018:ffff8800001c7c88 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000c00 RCX: 0000000000000000 RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fc300 RBP: ffff8800001c7cb8 R08: 0000000000000018 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246 R13: 0000000003000000 R14: ffffffff82e5f2e0 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000a1a008 CR3: 00000001c0604000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Stack: 0000000000000001 ffffffff82e5f2e0 ffffffff831a6ac0 fffffbfff0634c34 000000000001b6c0 0000000000000008 ffff8800001c7cd8 ffffffff81092bee 0000000000000008 ffffffff82924260 ffff8800001c7d30 ffffffff81ab8252 Call Trace: [] nmi_raise_cpu_backtrace+0x5e/0x80 arch/x86/kernel/apic/hw_nmi.c:33 [] nmi_trigger_all_cpu_backtrace.cold+0xa1/0xae lib/nmi_backtrace.c:85 [] arch_trigger_all_cpu_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 [] trigger_all_cpu_backtrace include/linux/nmi.h:44 [inline] [] check_hung_task kernel/hung_task.c:125 [inline] [] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline] [] watchdog.cold+0xd3/0xee kernel/hung_task.c:238 [] kthread+0x273/0x310 kernel/kthread.c:211 [] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:537 Code: 00 c3 5f ff 80 e6 10 75 e1 41 c1 e5 18 44 89 2c 25 10 c3 5f ff 44 89 fa 09 da 80 cf 04 41 83 ff 02 0f 44 d3 89 14 25 00 c3 5f ff <41> f7 c4 00 02 00 00 75 1e 4c 89 e7 57 9d 0f 1f 44 00 00 e8 f1 NMI backtrace for cpu 1 CPU: 1 PID: 3441 Comm: syz-executor.2 Not tainted 4.4.174+ #4 task: ffff8801151217c0 task.stack: ffff8800032c0000 RIP: 0010:[] [] lowmem_scan+0x44c/0xbf0 drivers/staging/android/lowmemorykiller.c:129 RSP: 0018:ffff8800032c75b8 EFLAGS: 00000246 RAX: 0000000000000007 RBX: ffff8800375b33c0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8211e78d RDI: ffff8800375b2f94 RBP: ffff8800032c7658 R08: ffff88013ebbb758 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8800375b2f80 R14: 000000000000221e R15: 00000000000003e8 lowmemorykiller: Killing 'syz-executor.2' (3441) (tgid 3441), adj 1000, to free 35348kB on behalf of 'syz-executor.2' (3497) because cache 648kB is below limit 6144kB for oom_score_adj 0 Free memory is 1672kB above reserved FS: 00007fe40d3dd700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000a19128 CR3: 00000000a33dc000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Stack: ffffffff8211e5af ffffffff821122ff ffff8800032c7608 0000000000000246 ffffffff82ea7320 ffff8801151217c0 0000000000000ea7 ffff8800032c7730 fffffbfff05c1200 0000223100000600 ffff88013ebbb758 ffff88018f600000 Call Trace: [] do_shrink_slab mm/vmscan.c:357 [inline] [] shrink_slab.part.0+0x402/0xb30 mm/vmscan.c:455 [] shrink_slab mm/vmscan.c:425 [inline] [] shrink_zone+0x4bc/0x610 mm/vmscan.c:2448 [] shrink_zones mm/vmscan.c:2603 [inline] [] do_try_to_free_pages mm/vmscan.c:2653 [inline] [] try_to_free_pages+0x66f/0x1260 mm/vmscan.c:2861 [] __perform_reclaim mm/page_alloc.c:2915 [inline] [] __alloc_pages_direct_reclaim mm/page_alloc.c:2936 [inline] [] __alloc_pages_slowpath mm/page_alloc.c:3201 [inline] [] __alloc_pages_nodemask+0x8af/0x14b0 mm/page_alloc.c:3313 [] __alloc_pages include/linux/gfp.h:415 [inline] [] __alloc_pages_node include/linux/gfp.h:428 [inline] [] alloc_pages_node include/linux/gfp.h:442 [inline] [] alloc_kmem_pages_node+0x23/0x30 mm/page_alloc.c:3504 [] alloc_thread_stack_node kernel/fork.c:167 [inline] [] dup_task_struct kernel/fork.c:353 [inline] [] copy_process+0x2e7/0x68a0 kernel/fork.c:1363 [] _do_fork+0x14e/0xdc0 kernel/fork.c:1806 [] sys_fork+0x1f/0x30 kernel/fork.c:1877 [] tracesys+0x88/0x8d Code: fb ff ff 48 89 f8 48 c1 e8 03 42 0f b6 14 20 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 e2 05 00 00 f6 83 d6 fb ff ff 20 <75> 91 e8 2d ae 1e ff 4c 89 ef e8 15 40 2a ff 48 85 c0 48 89 c3 lowmemorykiller: Killing 'syz-executor.2' (3441) (tgid 3441), adj 1000, to free 35348kB on behalf of 'getty' (3241) because cache 648kB is below limit 6144kB for oom_score_adj 0 Free memory is 1548kB above reserved lowmemorykiller: Killing 'syz-executor.2' (3441) (tgid 3441), adj 1000, to free 35348kB on behalf of 'syz-executor.2' (3229) because cache 648kB is below limit 6144kB for oom_score_adj 0 Free memory is 1548kB above reserved