lowmemorykiller: Killing 'syz-executor.0' (18521) (tgid 18521), adj 1000, to free 36032kB on behalf of 'kswapd0' (33) because cache 56808kB is below limit 65536kB for oom_score_adj 12 Free memory is 4272kB 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: [<00000000fbd8e116>] 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: 49349 hardirqs last enabled at (49349): [<00000000e5c3f075>] vprintk_emit+0x25c/0x6f0 kernel/printk/printk.c:1897 hardirqs last disabled at (49348): [<00000000da088de4>] vprintk_emit+0x6d/0x6f0 kernel/printk/printk.c:1801 softirqs last enabled at (36606): [<00000000663628f3>] __do_softirq+0x474/0x964 kernel/softirq.c:314 softirqs last disabled at (35465): [<0000000024bb0af7>] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (35465): [<0000000024bb0af7>] 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: [<00000000b7fa9092>] 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 ffffffff83cb0b40 ffff8801d84108f8 ffffffff84252000 ffff8801d841f498 ffffffff81408710 0000000000000000 ffffffff00000001 0000000000000001 Call Trace: [<0000000098036eb9>] __dump_stack lib/dump_stack.c:15 [inline] [<0000000098036eb9>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<00000000dae869b4>] print_usage_bug kernel/locking/lockdep.c:2387 [inline] [<00000000dae869b4>] print_usage_bug.cold+0x452/0x5a2 kernel/locking/lockdep.c:2354 [<000000006d726dd2>] valid_state kernel/locking/lockdep.c:2400 [inline] [<000000006d726dd2>] mark_lock_irq kernel/locking/lockdep.c:2602 [inline] [<000000006d726dd2>] mark_lock+0x6c7/0x12e0 kernel/locking/lockdep.c:3065 [<00000000b0cb719e>] mark_irqflags kernel/locking/lockdep.c:2958 [inline] [<00000000b0cb719e>] __lock_acquire+0x5be/0x4390 kernel/locking/lockdep.c:3302 [<00000000b10386d8>] lock_acquire+0x133/0x3d0 kernel/locking/lockdep.c:3756 [<000000006e5cdb61>] down_read+0x44/0xb0 kernel/locking/rwsem.c:22 [<00000000fbd8e116>] get_cmdline+0xa3/0x2d0 mm/util.c:641 [<00000000904eadb8>] handle_lmk_event+0x169/0x920 drivers/staging/android/lowmemorykiller.c:116 [<0000000078c14b37>] lowmem_scan+0x6f3/0xb70 drivers/staging/android/lowmemorykiller.c:354 [<000000001d0048cb>] do_shrink_slab mm/vmscan.c:399 [inline] [<000000001d0048cb>] shrink_slab.part.0+0x3cf/0xa20 mm/vmscan.c:502 [<0000000006b30b11>] shrink_slab mm/vmscan.c:466 [inline] [<0000000006b30b11>] shrink_node+0x1ed/0x750 mm/vmscan.c:2604 [<0000000030b72c4a>] kswapd_shrink_node mm/vmscan.c:3209 [inline] [<0000000030b72c4a>] balance_pgdat mm/vmscan.c:3329 [inline] [<0000000030b72c4a>] kswapd+0x7f8/0x13b0 mm/vmscan.c:3523 [<0000000029809975>] kthread+0x278/0x310 kernel/kthread.c:211 [<00000000f89a5998>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 lowmemorykiller: Killing 'syz-executor.0' (18798) (tgid 18798), adj 1000, to free 36020kB on behalf of 'kswapd0' (33) because cache 56808kB is below limit 65536kB for oom_score_adj 12 Free memory is 4672kB above reserved lowmemorykiller: Killing 'syz-executor.0' (18957) (tgid 18957), adj 1000, to free 36004kB on behalf of 'kswapd0' (33) because cache 56808kB is below limit 65536kB for oom_score_adj 12 Free memory is 4672kB above reserved lowmemorykiller: Killing 'syz-executor.0' (12440) (tgid 12440), adj 1000, to free 35996kB on behalf of 'kswapd0' (33) because cache 56004kB is below limit 65536kB for oom_score_adj 12 Free memory is -9188kB above reserved lowmemorykiller: Killing 'syz-executor.0' (12503) (tgid 12503), adj 1000, to free 35996kB on behalf of 'syz-executor.4' (19078) because cache 54604kB is below limit 65536kB for oom_score_adj 12 Free memory is -13212kB above reserved lowmemorykiller: Killing 'syz-executor.0' (12548) (tgid 12548), adj 1000, to free 35996kB on behalf of 'syz-executor.4' (19078) because cache 53304kB is below limit 65536kB for oom_score_adj 12 Free memory is -13204kB above reserved lowmemorykiller: Killing 'syz-executor.0' (3600) (tgid 3600), adj 1000, to free 35992kB on behalf of 'syz-executor.4' (19078) because cache 52104kB is below limit 65536kB for oom_score_adj 12 Free memory is -13016kB above reserved lowmemorykiller: Killing 'syz-executor.0' (18292) (tgid 18292), adj 1000, to free 35988kB on behalf of 'syz-executor.4' (19078) because cache 51004kB is below limit 65536kB for oom_score_adj 12 Free memory is -13040kB above reserved lowmemorykiller: Killing 'syz-executor.3' (13313) (tgid 13313), adj 1000, to free 35980kB on behalf of 'syz-executor.4' (19078) because cache 49904kB is below limit 65536kB for oom_score_adj 12 Free memory is -13232kB above reserved lowmemorykiller: Killing 'syz-executor.0' (18870) (tgid 18870), adj 1000, to free 35980kB on behalf of 'syz-executor.4' (19078) because cache 48804kB is below limit 65536kB for oom_score_adj 12 Free memory is -13200kB above reserved lowmemorykiller: Killing 'syz-executor.0' (19022) (tgid 19022), adj 1000, to free 35976kB on behalf of 'syz-executor.4' (19078) because cache 47604kB is below limit 65536kB for oom_score_adj 12 Free memory is -13168kB above reserved lowmemorykiller: Killing 'syz-executor.0' (19081) (tgid 19081), adj 1000, to free 35976kB on behalf of 'syz-executor.4' (19078) because cache 46504kB is below limit 65536kB for oom_score_adj 12 Free memory is -13136kB above reserved lowmemorykiller: Killing 'syz-executor.0' (17939) (tgid 17939), adj 1000, to free 35972kB on behalf of 'syz-executor.4' (19078) because cache 45304kB is below limit 65536kB for oom_score_adj 12 Free memory is -13128kB above reserved lowmemorykiller: Killing 'syz-executor.0' (17972) (tgid 17972), adj 1000, to free 35972kB on behalf of 'syz-executor.4' (19078) because cache 44204kB is below limit 65536kB for oom_score_adj 12 Free memory is -13196kB above reserved lowmemorykiller: Killing 'syz-executor.0' (18224) (tgid 18224), adj 1000, to free 35972kB on behalf of 'syz-executor.4' (19078) because cache 43104kB is below limit 65536kB for oom_score_adj 12 Free memory is -13164kB above reserved lowmemorykiller: Killing 'syz-executor.0' (18727) (tgid 18727), adj 1000, to free 35972kB on behalf of 'syz-executor.4' (19078) because cache 42104kB is below limit 65536kB for oom_score_adj 12 Free memory is -13088kB above reserved lowmemorykiller: Killing 'syz-executor.3' (8098) (tgid 8098), adj 1000, to free 35964kB on behalf of 'syz-executor.4' (19078) because cache 41204kB is below limit 65536kB for oom_score_adj 12 Free memory is -13228kB above reserved lowmemorykiller: Killing 'syz-executor.5' (14133) (tgid 14133), adj 1000, to free 35964kB on behalf of 'syz-executor.4' (19078) because cache 40304kB is below limit 65536kB for oom_score_adj 12 Free memory is -13228kB above reserved lowmemorykiller: Killing 'syz-executor.0' (18389) (tgid 18389), adj 1000, to free 35964kB on behalf of 'syz-executor.4' (19078) because cache 39804kB is below limit 65536kB for oom_score_adj 12 Free memory is -13028kB above reserved lowmemorykiller: Killing 'syz-executor.0' (18456) (tgid 18456), adj 1000, to free 35964kB on behalf of 'syz-executor.4' (19078) because cache 39504kB is below limit 65536kB for oom_score_adj 12 Free memory is -12956kB above reserved lowmemorykiller: Killing 'syz-executor.4' (19065) (tgid 19049), adj 1000, to free 35964kB on behalf of 'syz-executor.4' (19078) because cache 39304kB is below limit 65536kB for oom_score_adj 12 Free memory is -13080kB above reserved capability: warning: `syz-executor.3' uses deprecated v2 capabilities in a way that may be insecure