lowmemorykiller: Killing 'syz-executor.3' (3476) (tgid 3469), adj 1000, to free 52392kB on behalf of 'kswapd0' (33) because cache 65352kB is below limit 65536kB for oom_score_adj 12 Free memory is 46596kB above reserved ================================= [ INFO: inconsistent lock state ] 4.9.194+ #0 Not tainted --------------------------------- inconsistent {RECLAIM_FS-ON-W} -> {IN-RECLAIM_FS-R} usage. kswapd0/33 [HC0[0]:SC0[0]:HE1:SE1] takes: (&mm->mmap_sem){+++++?}, at: [<0000000039751b1d>] get_cmdline+0xa3/0x2d0 mm/util.c:641 mark_held_locks+0xb1/0x100 kernel/locking/lockdep.c:2660 __lockdep_trace_alloc kernel/locking/lockdep.c:2882 [inline] lockdep_trace_alloc+0x18c/0x2b0 kernel/locking/lockdep.c:2897 __alloc_pages_nodemask+0x143/0x1a80 mm/page_alloc.c:3803 __alloc_pages include/linux/gfp.h:433 [inline] __alloc_pages_node include/linux/gfp.h:446 [inline] alloc_pages_node include/linux/gfp.h:460 [inline] pmd_alloc_one arch/x86/include/asm/pgalloc.h:88 [inline] __pmd_alloc+0x4a/0x330 mm/memory.c:3742 pmd_alloc include/linux/mm.h:1625 [inline] alloc_new_pmd mm/mremap.c:64 [inline] move_page_tables+0xadb/0xd60 mm/mremap.c:212 shift_arg_pages+0x1ae/0x470 fs/exec.c:642 setup_arg_pages+0x60d/0x7c0 fs/exec.c:754 load_elf_binary+0xa84/0x4a90 fs/binfmt_elf.c:860 search_binary_handler fs/exec.c:1621 [inline] search_binary_handler+0x14f/0x700 fs/exec.c:1599 exec_binprm fs/exec.c:1663 [inline] do_execveat_common.isra.0+0xf81/0x1db0 fs/exec.c:1785 do_execve+0x3a/0x50 fs/exec.c:1829 run_init_process+0x33/0x37 init/main.c:904 try_to_run_init_process+0x18/0x48 init/main.c:913 kernel_init+0xf2/0x163 init/main.c:984 ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 irq event stamp: 66851 hardirqs last enabled at (66851): [<00000000b7030edc>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:170 [inline] hardirqs last enabled at (66851): [<00000000b7030edc>] _raw_spin_unlock_irq+0x28/0x60 kernel/locking/spinlock.c:199 hardirqs last disabled at (66850): [<0000000004987873>] __schedule+0x184/0x1f10 kernel/sched/core.c:3432 softirqs last enabled at (66784): [<000000001aa90f9c>] __do_softirq+0x474/0x964 kernel/softirq.c:314 softirqs last disabled at (66775): [<00000000eef94b37>] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (66775): [<00000000eef94b37>] irq_exit+0x119/0x160 kernel/softirq.c:409 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&mm->mmap_sem); lock(&mm->mmap_sem); *** DEADLOCK *** 1 lock held by kswapd0/33: #0: (shrinker_rwsem){++++..}, at: [<0000000062a0108a>] shrink_slab.part.0+0xb2/0xa20 mm/vmscan.c:472 stack backtrace: CPU: 1 PID: 33 Comm: kswapd0 Not tainted 4.9.194+ #0 ffff8801d841f420 ffffffff81b67001 00000000000000f0 ffff8801d8410000 ffffffff83cb1050 ffff8801d84108f8 ffffffff84252000 ffff8801d841f498 ffffffff81408710 0000000000000000 ffffffff00000001 0000000000000001 Call Trace: [<00000000771972ea>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000771972ea>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<00000000cdc61c67>] print_usage_bug kernel/locking/lockdep.c:2387 [inline] [<00000000cdc61c67>] print_usage_bug.cold+0x452/0x5a2 kernel/locking/lockdep.c:2354 [<00000000496af9bd>] valid_state kernel/locking/lockdep.c:2400 [inline] [<00000000496af9bd>] mark_lock_irq kernel/locking/lockdep.c:2602 [inline] [<00000000496af9bd>] mark_lock+0x6c7/0x12e0 kernel/locking/lockdep.c:3065 [<000000008f28d43f>] mark_irqflags kernel/locking/lockdep.c:2958 [inline] [<000000008f28d43f>] __lock_acquire+0x5be/0x4390 kernel/locking/lockdep.c:3302 [<00000000c6417854>] lock_acquire+0x133/0x3d0 kernel/locking/lockdep.c:3756 [<000000009aa7ad99>] down_read+0x44/0xb0 kernel/locking/rwsem.c:22 [<0000000039751b1d>] get_cmdline+0xa3/0x2d0 mm/util.c:641 [<0000000061f45f36>] handle_lmk_event+0x169/0x920 drivers/staging/android/lowmemorykiller.c:116 [<0000000063f381b4>] lowmem_scan+0x6f3/0xb70 drivers/staging/android/lowmemorykiller.c:354 [<000000001bc27071>] do_shrink_slab mm/vmscan.c:399 [inline] [<000000001bc27071>] shrink_slab.part.0+0x3cf/0xa20 mm/vmscan.c:502 [<00000000d8a7d6b0>] shrink_slab mm/vmscan.c:466 [inline] [<00000000d8a7d6b0>] shrink_node+0x1ed/0x750 mm/vmscan.c:2604 [<000000009cafea91>] kswapd_shrink_node mm/vmscan.c:3209 [inline] [<000000009cafea91>] balance_pgdat mm/vmscan.c:3329 [inline] [<000000009cafea91>] kswapd+0x7f8/0x13b0 mm/vmscan.c:3523 [<00000000793a5e02>] kthread+0x278/0x310 kernel/kthread.c:211 [<0000000006be241d>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 lowmemorykiller: Killing 'syz-executor.3' (3476) (tgid 3469), adj 1000, to free 52392kB on behalf of 'kswapd0' (33) because cache 65380kB is below limit 65536kB for oom_score_adj 12 Free memory is 42080kB above reserved devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options lowmemorykiller: Killing 'syz-executor.3' (25170) (tgid 25170), adj 1000, to free 52380kB on behalf of 'kswapd0' (33) because cache 65276kB is below limit 65536kB for oom_score_adj 12 Free memory is -5348kB above reserved lowmemorykiller: Killing 'syz-executor.5' (18313) (tgid 18313), adj 1000, to free 52376kB on behalf of 'kswapd0' (33) because cache 65280kB is below limit 65536kB for oom_score_adj 12 Free memory is 5820kB above reserved lowmemorykiller: Killing 'syz-executor.2' (3650) (tgid 3650), adj 1000, to free 52400kB on behalf of 'kswapd0' (33) because cache 65280kB is below limit 65536kB for oom_score_adj 12 Free memory is 21800kB above reserved lowmemorykiller: Killing 'syz-executor.3' (3665) (tgid 3665), adj 1000, to free 52380kB on behalf of 'kswapd0' (33) because cache 65304kB is below limit 65536kB for oom_score_adj 12 Free memory is 52076kB above reserved lowmemorykiller: Killing 'syz-executor.3' (27294) (tgid 27294), adj 1000, to free 52376kB on behalf of 'kswapd0' (33) because cache 65304kB is below limit 65536kB for oom_score_adj 12 Free memory is 61320kB above reserved devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options lowmemorykiller: Killing 'syz-executor.4' (3708) (tgid 3708), adj 1000, to free 52376kB on behalf of 'kswapd0' (33) because cache 65316kB is below limit 65536kB for oom_score_adj 12 Free memory is -3716kB above reserved lowmemorykiller: Killing 'syz-executor.2' (3731) (tgid 3731), adj 1000, to free 52376kB on behalf of 'kswapd0' (33) because cache 64960kB is below limit 65536kB for oom_score_adj 12 Free memory is 15976kB above reserved devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options devpts: called with bogus options