lowmemorykiller: Killing 'syz-executor.3' (3221) (tgid 3221), adj 1000, to free 40716kB on behalf of 'syz-executor.3' (9865) because cache 60292kB is below limit 65536kB for oom_score_adj 12 Free memory is -12576kB above reserved BUG: sleeping function called from invalid context at kernel/fork.c:905 in_atomic(): 0, irqs_disabled(): 0, pid: 9865, name: syz-executor.3 2 locks held by syz-executor.3/9865: #0: (shrinker_rwsem){++++..}, at: [<00000000fb14ebe9>] shrink_slab.part.0+0xb2/0xa20 mm/vmscan.c:472 #1: (rcu_read_lock){......}, at: [<00000000bb16c9d1>] lowmem_scan+0x242/0xb50 drivers/staging/android/lowmemorykiller.c:272 Preemption disabled at: [<000000001e260d90>] spin_lock include/linux/spinlock.h:302 [inline] [<000000001e260d90>] task_lock include/linux/sched.h:3217 [inline] [<000000001e260d90>] get_task_mm+0x20/0xc0 kernel/fork.c:1012 CPU: 0 PID: 9865 Comm: syz-executor.3 Not tainted 4.9.189+ #22 ffff8801d7a47408 ffffffff81b65c01 0000000000000000 0000000000000001 ffff88019c482f80 ffffffff810d1010 ffff88019c482f80 ffff8801d7a47440 ffffffff814018f3 ffff88019c482f80 ffffffff82a39fc0 0000000000000389 Call Trace: [<000000009f447df7>] __dump_stack lib/dump_stack.c:15 [inline] [<000000009f447df7>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<00000000a9b7ab67>] ___might_sleep.cold+0x1c1/0x1fa kernel/sched/core.c:8004 [<00000000bb21e0f0>] __might_sleep+0x95/0x1a0 kernel/sched/core.c:7961 [<00000000c3f06185>] mmput+0x28/0x370 kernel/fork.c:905 [<000000001b6f3ebc>] handle_lmk_event+0xea/0x8a0 drivers/staging/android/lowmemorykiller.c:111 [<0000000064c3036a>] lowmem_scan+0x695/0xb50 drivers/staging/android/lowmemorykiller.c:345 [<000000001bdc5574>] do_shrink_slab mm/vmscan.c:399 [inline] [<000000001bdc5574>] shrink_slab.part.0+0x3cf/0xa20 mm/vmscan.c:502 [<000000002c00c0eb>] shrink_slab mm/vmscan.c:466 [inline] [<000000002c00c0eb>] shrink_node+0x1ed/0x750 mm/vmscan.c:2604 [<0000000070ce9569>] shrink_zones mm/vmscan.c:2751 [inline] [<0000000070ce9569>] do_try_to_free_pages mm/vmscan.c:2793 [inline] [<0000000070ce9569>] try_to_free_pages+0x397/0xbd0 mm/vmscan.c:3004 [<000000001da60dcc>] __perform_reclaim mm/page_alloc.c:3332 [inline] [<000000001da60dcc>] __alloc_pages_direct_reclaim mm/page_alloc.c:3354 [inline] [<000000001da60dcc>] __alloc_pages_slowpath mm/page_alloc.c:3704 [inline] [<000000001da60dcc>] __alloc_pages_nodemask+0x930/0x1a80 mm/page_alloc.c:3861 [<00000000afb95d44>] __alloc_pages include/linux/gfp.h:433 [inline] [<00000000afb95d44>] __alloc_pages_node include/linux/gfp.h:446 [inline] [<00000000afb95d44>] alloc_pages_node include/linux/gfp.h:460 [inline] [<00000000afb95d44>] __vmalloc_area_node mm/vmalloc.c:1648 [inline] [<00000000afb95d44>] __vmalloc_node_range+0x25b/0x610 mm/vmalloc.c:1706 [<00000000e21c70a1>] __vmalloc_node mm/vmalloc.c:1749 [inline] [<00000000e21c70a1>] __vmalloc_node_flags mm/vmalloc.c:1763 [inline] [<00000000e21c70a1>] vmalloc+0x5c/0x70 mm/vmalloc.c:1778 [<00000000be00668b>] xt_alloc_table_info+0xc8/0x100 net/netfilter/x_tables.c:997 [<00000000df5e2f77>] do_replace net/ipv6/netfilter/ip6_tables.c:1175 [inline] [<00000000df5e2f77>] do_ip6t_set_ctl+0x231/0x480 net/ipv6/netfilter/ip6_tables.c:1712 [<000000009f48f605>] nf_sockopt net/netfilter/nf_sockopt.c:105 [inline] [<000000009f48f605>] nf_setsockopt+0x6d/0xc0 net/netfilter/nf_sockopt.c:114 [<0000000061e1064d>] ipv6_setsockopt net/ipv6/ipv6_sockglue.c:922 [inline] [<0000000061e1064d>] ipv6_setsockopt+0x10b/0x140 net/ipv6/ipv6_sockglue.c:906 [<0000000097027cb6>] tcp_setsockopt net/ipv4/tcp.c:2759 [inline] [<0000000097027cb6>] tcp_setsockopt+0x8a/0xe0 net/ipv4/tcp.c:2753 [<00000000e380fb5b>] sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:2710 [<000000002cd4231b>] SYSC_setsockopt net/socket.c:1786 [inline] [<000000002cd4231b>] SyS_setsockopt+0x159/0x240 net/socket.c:1765 [<00000000f801cb8e>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<0000000053ad4186>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb ================================= [ INFO: inconsistent lock state ] 4.9.189+ #22 Tainted: G W --------------------------------- inconsistent {RECLAIM_FS-ON-W} -> {IN-RECLAIM_FS-R} usage. syz-executor.3/9865 [HC0[0]:SC0[0]:HE1:SE1] takes: (&mm->mmap_sem){+++++?}, at: [<0000000098746e1a>] 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: 1324467 hardirqs last enabled at (1324467): [<0000000074ca0b58>] restore_regs_and_iret+0x0/0x1d hardirqs last disabled at (1324466): [<00000000f1e9ee81>] preempt_schedule_irq+0x6a/0xa0 kernel/sched/core.c:3705 softirqs last enabled at (1314064): [<000000005af0d488>] __do_softirq+0x474/0x964 kernel/softirq.c:314 softirqs last disabled at (1314043): [<0000000079330822>] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (1314043): [<0000000079330822>] 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 *** 3 locks held by syz-executor.3/9865: #0: (shrinker_rwsem){++++..}, at: [<00000000fb14ebe9>] shrink_slab.part.0+0xb2/0xa20 mm/vmscan.c:472 #1: (rcu_read_lock){......}, at: [<00000000bb16c9d1>] lowmem_scan+0x242/0xb50 drivers/staging/android/lowmemorykiller.c:272 #2: (lmk_event_lock){+.+.-.}, at: [<000000004cd83889>] spin_lock include/linux/spinlock.h:302 [inline] #2: (lmk_event_lock){+.+.-.}, at: [<000000004cd83889>] handle_lmk_event+0xfb/0x8a0 drivers/staging/android/lowmemorykiller.c:114 stack backtrace: CPU: 0 PID: 9865 Comm: syz-executor.3 Tainted: G W 4.9.189+ #22 ffff8801d7a47150 ffffffff81b65c01 00000000000000f0 ffff88019c482f80 ffffffff83caf950 ffff88019c4838c8 ffffffff84250fc0 ffff8801d7a471c8 ffffffff81408330 0000000000000000 ffffffff00000001 0000000000000001 Call Trace: [<000000009f447df7>] __dump_stack lib/dump_stack.c:15 [inline] [<000000009f447df7>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<000000006e9577d4>] print_usage_bug kernel/locking/lockdep.c:2387 [inline] [<000000006e9577d4>] print_usage_bug.cold+0x452/0x5a2 kernel/locking/lockdep.c:2354 [<0000000086de0bf9>] valid_state kernel/locking/lockdep.c:2400 [inline] [<0000000086de0bf9>] mark_lock_irq kernel/locking/lockdep.c:2602 [inline] [<0000000086de0bf9>] mark_lock+0x6c7/0x12e0 kernel/locking/lockdep.c:3065 [<0000000033c8d7d3>] mark_irqflags kernel/locking/lockdep.c:2958 [inline] [<0000000033c8d7d3>] __lock_acquire+0x5be/0x4390 kernel/locking/lockdep.c:3302 [<000000008d143c14>] lock_acquire+0x133/0x3d0 kernel/locking/lockdep.c:3756 [<0000000016d67d57>] down_read+0x44/0xb0 kernel/locking/rwsem.c:22 [<0000000098746e1a>] get_cmdline+0xa3/0x2d0 mm/util.c:641 [<00000000f3b9540f>] handle_lmk_event+0x13c/0x8a0 drivers/staging/android/lowmemorykiller.c:128 [<0000000064c3036a>] lowmem_scan+0x695/0xb50 drivers/staging/android/lowmemorykiller.c:345 [<000000001bdc5574>] do_shrink_slab mm/vmscan.c:399 [inline] [<000000001bdc5574>] shrink_slab.part.0+0x3cf/0xa20 mm/vmscan.c:502 [<000000002c00c0eb>] shrink_slab mm/vmscan.c:466 [inline] [<000000002c00c0eb>] shrink_node+0x1ed/0x750 mm/vmscan.c:2604 [<0000000070ce9569>] shrink_zones mm/vmscan.c:2751 [inline] [<0000000070ce9569>] do_try_to_free_pages mm/vmscan.c:2793 [inline] [<0000000070ce9569>] try_to_free_pages+0x397/0xbd0 mm/vmscan.c:3004 [<000000001da60dcc>] __perform_reclaim mm/page_alloc.c:3332 [inline] [<000000001da60dcc>] __alloc_pages_direct_reclaim mm/page_alloc.c:3354 [inline] [<000000001da60dcc>] __alloc_pages_slowpath mm/page_alloc.c:3704 [inline] [<000000001da60dcc>] __alloc_pages_nodemask+0x930/0x1a80 mm/page_alloc.c:3861 [<00000000afb95d44>] __alloc_pages include/linux/gfp.h:433 [inline] [<00000000afb95d44>] __alloc_pages_node include/linux/gfp.h:446 [inline] [<00000000afb95d44>] alloc_pages_node include/linux/gfp.h:460 [inline] [<00000000afb95d44>] __vmalloc_area_node mm/vmalloc.c:1648 [inline] [<00000000afb95d44>] __vmalloc_node_range+0x25b/0x610 mm/vmalloc.c:1706 [<00000000e21c70a1>] __vmalloc_node mm/vmalloc.c:1749 [inline] [<00000000e21c70a1>] __vmalloc_node_flags mm/vmalloc.c:1763 [inline] [<00000000e21c70a1>] vmalloc+0x5c/0x70 mm/vmalloc.c:1778 [<00000000be00668b>] xt_alloc_table_info+0xc8/0x100 net/netfilter/x_tables.c:997 [<00000000df5e2f77>] do_replace net/ipv6/netfilter/ip6_tables.c:1175 [inline] [<00000000df5e2f77>] do_ip6t_set_ctl+0x231/0x480 net/ipv6/netfilter/ip6_tables.c:1712 [<000000009f48f605>] nf_sockopt net/netfilter/nf_sockopt.c:105 [inline] [<000000009f48f605>] nf_setsockopt+0x6d/0xc0 net/netfilter/nf_sockopt.c:114 [<0000000061e1064d>] ipv6_setsockopt net/ipv6/ipv6_sockglue.c:922 [inline] [<0000000061e1064d>] ipv6_setsockopt+0x10b/0x140 net/ipv6/ipv6_sockglue.c:906 [<0000000097027cb6>] tcp_setsockopt net/ipv4/tcp.c:2759 [inline] [<0000000097027cb6>] tcp_setsockopt+0x8a/0xe0 net/ipv4/tcp.c:2753 [<00000000e380fb5b>] sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:2710 [<000000002cd4231b>] SYSC_setsockopt net/socket.c:1786 [inline] [<000000002cd4231b>] SyS_setsockopt+0x159/0x240 net/socket.c:1765 [<00000000f801cb8e>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<0000000053ad4186>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb lowmemorykiller: Killing 'syz-executor.3' (3227) (tgid 3227), adj 1000, to free 37968kB on behalf of 'syz-executor.3' (9865) because cache 52092kB is below limit 65536kB for oom_score_adj 12 Free memory is -13176kB above reserved lowmemorykiller: Killing 'syz-executor.4' (3225) (tgid 3225), adj 1000, to free 37236kB on behalf of 'syz-executor.3' (9865) because cache 51092kB is below limit 65536kB for oom_score_adj 12 Free memory is -11844kB above reserved lowmemorykiller: Killing 'syz-executor.2' (4373) (tgid 4373), adj 1000, to free 36228kB on behalf of 'syz-executor.3' (9865) because cache 47092kB is below limit 65536kB for oom_score_adj 12 Free memory is -12624kB above reserved lowmemorykiller: Killing 'syz-executor.0' (4132) (tgid 4132), adj 1000, to free 36220kB on behalf of 'syz-executor.3' (9865) because cache 36592kB is below limit 65536kB for oom_score_adj 12 Free memory is -13224kB above reserved lowmemorykiller: Killing 'syz-executor.1' (4168) (tgid 4168), adj 1000, to free 36220kB on behalf of 'syz-executor.3' (9865) because cache 34992kB is below limit 65536kB for oom_score_adj 12 Free memory is -13112kB above reserved lowmemorykiller: Killing 'syz-executor.2' (4167) (tgid 4167), adj 1000, to free 36216kB on behalf of 'syz-executor.3' (9865) because cache 32892kB is below limit 65536kB for oom_score_adj 12 Free memory is -13408kB above reserved lowmemorykiller: Killing 'syz-executor.0' (4188) (tgid 4188), adj 1000, to free 36212kB on behalf of 'syz-executor.3' (9865) because cache 30792kB is below limit 65536kB for oom_score_adj 12 Free memory is -10908kB above reserved lowmemorykiller: Killing 'syz-executor.2' (4338) (tgid 4338), adj 1000, to free 36180kB on behalf of 'syz-executor.3' (9865) because cache 30592kB is below limit 65536kB for oom_score_adj 12 Free memory is -12980kB above reserved lowmemorykiller: Killing 'syz-executor.2' (4040) (tgid 4040), adj 1000, to free 36160kB on behalf of 'syz-executor.3' (9865) because cache 30292kB is below limit 65536kB for oom_score_adj 12 Free memory is -13128kB above reserved lowmemorykiller: Killing 'syz-executor.2' (4107) (tgid 4107), adj 1000, to free 36160kB on behalf of 'syz-executor.3' (9865) because cache 29992kB is below limit 65536kB for oom_score_adj 12 Free memory is -13424kB above reserved lowmemorykiller: Killing 'syz-executor.0' (4103) (tgid 4103), adj 1000, to free 36016kB on behalf of 'syz-executor.3' (9865) because cache 29792kB is below limit 65536kB for oom_score_adj 12 Free memory is -13024kB above reserved lowmemorykiller: Killing 'syz-executor.3' (4067) (tgid 4067), adj 1000, to free 36012kB on behalf of 'syz-executor.3' (9865) because cache 29192kB is below limit 65536kB for oom_score_adj 12 Free memory is -12224kB above reserved lowmemorykiller: Killing 'syz-executor.0' (4077) (tgid 4077), adj 1000, to free 35992kB on behalf of 'syz-executor.3' (9865) because cache 28992kB is below limit 65536kB for oom_score_adj 12 Free memory is -13172kB above reserved lowmemorykiller: Killing 'syz-executor.3' (4043) (tgid 4043), adj 1000, to free 35988kB on behalf of 'syz-executor.3' (9865) because cache 28792kB is below limit 65536kB for oom_score_adj 12 Free memory is -13172kB above reserved lowmemorykiller: Killing 'syz-executor.3' (4055) (tgid 4055), adj 1000, to free 35988kB on behalf of 'syz-executor.3' (9865) because cache 28692kB is below limit 65536kB for