lowmemorykiller: Killing 'syz-executor.5' (4139) (tgid 4139), adj 1000, to free 36012kB on behalf of 'syz-executor.4' (32732) because cache 53288kB is below limit 65536kB for oom_score_adj 12 Free memory is -13160kB above reserved BUG: sleeping function called from invalid context at kernel/fork.c:905 in_atomic(): 0, irqs_disabled(): 0, pid: 32732, name: syz-executor.4 2 locks held by syz-executor.4/32732: #0: (shrinker_rwsem){++++..}, at: [<00000000f52d7dd9>] shrink_slab.part.0+0xb2/0xa20 mm/vmscan.c:472 #1: (rcu_read_lock){......}, at: [<00000000cdacd393>] lowmem_scan+0x242/0xb50 drivers/staging/android/lowmemorykiller.c:272 Preemption disabled at: [<00000000bed2081c>] spin_lock include/linux/spinlock.h:302 [inline] [<00000000bed2081c>] task_lock include/linux/sched.h:3217 [inline] [<00000000bed2081c>] get_task_mm+0x20/0xc0 kernel/fork.c:1012 CPU: 0 PID: 32732 Comm: syz-executor.4 Not tainted 4.9.189+ #22 ffff8801c911f408 ffffffff81b65c01 0000000000000000 0000000000000001 ffff8801a4508000 ffffffff810d1010 ffff8801a4508000 ffff8801c911f440 ffffffff814018f3 ffff8801a4508000 ffffffff82a39fc0 0000000000000389 Call Trace: [<00000000732f6af8>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000732f6af8>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<000000008e164ce6>] ___might_sleep.cold+0x1c1/0x1fa kernel/sched/core.c:8004 [<00000000ca66eb63>] __might_sleep+0x95/0x1a0 kernel/sched/core.c:7961 [<00000000d3898ca6>] mmput+0x28/0x370 kernel/fork.c:905 [<000000000a179654>] handle_lmk_event+0xea/0x8a0 drivers/staging/android/lowmemorykiller.c:111 [<00000000cd5516b5>] lowmem_scan+0x695/0xb50 drivers/staging/android/lowmemorykiller.c:345 [<000000005522d7a9>] do_shrink_slab mm/vmscan.c:399 [inline] [<000000005522d7a9>] shrink_slab.part.0+0x3cf/0xa20 mm/vmscan.c:502 [<00000000a71ad396>] shrink_slab mm/vmscan.c:466 [inline] [<00000000a71ad396>] shrink_node+0x1ed/0x750 mm/vmscan.c:2604 [<00000000e135b2cb>] shrink_zones mm/vmscan.c:2751 [inline] [<00000000e135b2cb>] do_try_to_free_pages mm/vmscan.c:2793 [inline] [<00000000e135b2cb>] try_to_free_pages+0x397/0xbd0 mm/vmscan.c:3004 [<00000000081b0109>] __perform_reclaim mm/page_alloc.c:3332 [inline] [<00000000081b0109>] __alloc_pages_direct_reclaim mm/page_alloc.c:3354 [inline] [<00000000081b0109>] __alloc_pages_slowpath mm/page_alloc.c:3704 [inline] [<00000000081b0109>] __alloc_pages_nodemask+0x930/0x1a80 mm/page_alloc.c:3861 [<00000000a4ae64c2>] __alloc_pages include/linux/gfp.h:433 [inline] [<00000000a4ae64c2>] __alloc_pages_node include/linux/gfp.h:446 [inline] [<00000000a4ae64c2>] alloc_pages_node include/linux/gfp.h:460 [inline] [<00000000a4ae64c2>] __vmalloc_area_node mm/vmalloc.c:1648 [inline] [<00000000a4ae64c2>] __vmalloc_node_range+0x25b/0x610 mm/vmalloc.c:1706 [<000000009b87448c>] __vmalloc_node mm/vmalloc.c:1749 [inline] [<000000009b87448c>] __vmalloc_node_flags mm/vmalloc.c:1763 [inline] [<000000009b87448c>] vmalloc+0x5c/0x70 mm/vmalloc.c:1778 [<000000001568a07f>] xt_alloc_table_info+0xc8/0x100 net/netfilter/x_tables.c:997 [<00000000a3c00587>] do_replace net/ipv6/netfilter/ip6_tables.c:1175 [inline] [<00000000a3c00587>] do_ip6t_set_ctl+0x231/0x480 net/ipv6/netfilter/ip6_tables.c:1712 [<00000000b99fe1f3>] nf_sockopt net/netfilter/nf_sockopt.c:105 [inline] [<00000000b99fe1f3>] nf_setsockopt+0x6d/0xc0 net/netfilter/nf_sockopt.c:114 [<0000000077b17a00>] ipv6_setsockopt net/ipv6/ipv6_sockglue.c:922 [inline] [<0000000077b17a00>] ipv6_setsockopt+0x10b/0x140 net/ipv6/ipv6_sockglue.c:906 [<00000000e0819015>] tcp_setsockopt net/ipv4/tcp.c:2759 [inline] [<00000000e0819015>] tcp_setsockopt+0x8a/0xe0 net/ipv4/tcp.c:2753 [<0000000066814ced>] sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:2710 [<0000000074523ac2>] SYSC_setsockopt net/socket.c:1786 [inline] [<0000000074523ac2>] SyS_setsockopt+0x159/0x240 net/socket.c:1765 [<000000005a72bc08>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<00000000f05d55f8>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb lowmemorykiller: Killing 'syz-executor.2' (10056) (tgid 10056), adj 1000, to free 36000kB on behalf of 'syz-executor.4' (32732) because cache 51888kB is below limit 65536kB for oom_score_adj 12 Free memory is -13396kB above reserved ================================= [ INFO: inconsistent lock state ] 4.9.189+ #22 Tainted: G W --------------------------------- inconsistent {RECLAIM_FS-ON-W} -> {IN-RECLAIM_FS-R} usage. syz-executor.4/32732 [HC0[0]:SC0[0]:HE1:SE1] takes: (&mm->mmap_sem){+++++?}, at: [<00000000c888e687>] 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: 1422089 hardirqs last enabled at (1422089): [<000000001121635c>] vprintk_emit+0x25c/0x6f0 kernel/printk/printk.c:1897 hardirqs last disabled at (1422088): [<0000000028b8259b>] vprintk_emit+0x6d/0x6f0 kernel/printk/printk.c:1801 softirqs last enabled at (1417846): [<000000002562fdd5>] __do_softirq+0x474/0x964 kernel/softirq.c:314 softirqs last disabled at (1417827): [<00000000fc6ec7fc>] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (1417827): [<00000000fc6ec7fc>] 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.4/32732: #0: (shrinker_rwsem){++++..}, at: [<00000000f52d7dd9>] shrink_slab.part.0+0xb2/0xa20 mm/vmscan.c:472 #1: (rcu_read_lock){......}, at: [<00000000cdacd393>] lowmem_scan+0x242/0xb50 drivers/staging/android/lowmemorykiller.c:272 #2: (lmk_event_lock){+.+.-.}, at: [<00000000b5569687>] spin_lock include/linux/spinlock.h:302 [inline] #2: (lmk_event_lock){+.+.-.}, at: [<00000000b5569687>] handle_lmk_event+0xfb/0x8a0 drivers/staging/android/lowmemorykiller.c:114 stack backtrace: CPU: 0 PID: 32732 Comm: syz-executor.4 Tainted: G W 4.9.189+ #22 ffff8801c911f150 ffffffff81b65c01 00000000000000f0 ffff8801a4508000 ffffffff83cb0010 ffff8801a4508948 ffffffff84250fc0 ffff8801c911f1c8 ffffffff81408330 0000000000000000 ffffffff00000001 0000000000000001 Call Trace: [<00000000732f6af8>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000732f6af8>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<000000002db83385>] print_usage_bug kernel/locking/lockdep.c:2387 [inline] [<000000002db83385>] print_usage_bug.cold+0x452/0x5a2 kernel/locking/lockdep.c:2354 [<000000004e0b4b3a>] valid_state kernel/locking/lockdep.c:2400 [inline] [<000000004e0b4b3a>] mark_lock_irq kernel/locking/lockdep.c:2602 [inline] [<000000004e0b4b3a>] mark_lock+0x6c7/0x12e0 kernel/locking/lockdep.c:3065 [<000000004007a908>] mark_irqflags kernel/locking/lockdep.c:2958 [inline] [<000000004007a908>] __lock_acquire+0x5be/0x4390 kernel/locking/lockdep.c:3302 [<00000000493dda38>] lock_acquire+0x133/0x3d0 kernel/locking/lockdep.c:3756 [<00000000bd45ad5d>] down_read+0x44/0xb0 kernel/locking/rwsem.c:22 [<00000000c888e687>] get_cmdline+0xa3/0x2d0 mm/util.c:641 [<0000000075cae893>] handle_lmk_event+0x13c/0x8a0 drivers/staging/android/lowmemorykiller.c:128 [<00000000cd5516b5>] lowmem_scan+0x695/0xb50 drivers/staging/android/lowmemorykiller.c:345 [<000000005522d7a9>] do_shrink_slab mm/vmscan.c:399 [inline] [<000000005522d7a9>] shrink_slab.part.0+0x3cf/0xa20 mm/vmscan.c:502 [<00000000a71ad396>] shrink_slab mm/vmscan.c:466 [inline] [<00000000a71ad396>] shrink_node+0x1ed/0x750 mm/vmscan.c:2604 [<00000000e135b2cb>] shrink_zones mm/vmscan.c:2751 [inline] [<00000000e135b2cb>] do_try_to_free_pages mm/vmscan.c:2793 [inline] [<00000000e135b2cb>] try_to_free_pages+0x397/0xbd0 mm/vmscan.c:3004 [<00000000081b0109>] __perform_reclaim mm/page_alloc.c:3332 [inline] [<00000000081b0109>] __alloc_pages_direct_reclaim mm/page_alloc.c:3354 [inline] [<00000000081b0109>] __alloc_pages_slowpath mm/page_alloc.c:3704 [inline] [<00000000081b0109>] __alloc_pages_nodemask+0x930/0x1a80 mm/page_alloc.c:3861 [<00000000a4ae64c2>] __alloc_pages include/linux/gfp.h:433 [inline] [<00000000a4ae64c2>] __alloc_pages_node include/linux/gfp.h:446 [inline] [<00000000a4ae64c2>] alloc_pages_node include/linux/gfp.h:460 [inline] [<00000000a4ae64c2>] __vmalloc_area_node mm/vmalloc.c:1648 [inline] [<00000000a4ae64c2>] __vmalloc_node_range+0x25b/0x610 mm/vmalloc.c:1706 [<000000009b87448c>] __vmalloc_node mm/vmalloc.c:1749 [inline] [<000000009b87448c>] __vmalloc_node_flags mm/vmalloc.c:1763 [inline] [<000000009b87448c>] vmalloc+0x5c/0x70 mm/vmalloc.c:1778 [<000000001568a07f>] xt_alloc_table_info+0xc8/0x100 net/netfilter/x_tables.c:997 [<00000000a3c00587>] do_replace net/ipv6/netfilter/ip6_tables.c:1175 [inline] [<00000000a3c00587>] do_ip6t_set_ctl+0x231/0x480 net/ipv6/netfilter/ip6_tables.c:1712 [<00000000b99fe1f3>] nf_sockopt net/netfilter/nf_sockopt.c:105 [inline] [<00000000b99fe1f3>] nf_setsockopt+0x6d/0xc0 net/netfilter/nf_sockopt.c:114 [<0000000077b17a00>] ipv6_setsockopt net/ipv6/ipv6_sockglue.c:922 [inline] [<0000000077b17a00>] ipv6_setsockopt+0x10b/0x140 net/ipv6/ipv6_sockglue.c:906 [<00000000e0819015>] tcp_setsockopt net/ipv4/tcp.c:2759 [inline] [<00000000e0819015>] tcp_setsockopt+0x8a/0xe0 net/ipv4/tcp.c:2753 [<0000000066814ced>] sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:2710 [<0000000074523ac2>] SYSC_setsockopt net/socket.c:1786 [inline] [<0000000074523ac2>] SyS_setsockopt+0x159/0x240 net/socket.c:1765 [<000000005a72bc08>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<00000000f05d55f8>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb lowmemorykiller: Killing 'syz-executor.2' (10067) (tgid 10067), adj 1000, to free 36000kB on behalf of 'syz-executor.4' (32732) because cache 48788kB is below limit 65536kB for oom_score_adj 12 Free memory is -13284kB above reserved lowmemorykiller: Killing 'syz-executor.1' (3876) (tgid 3876), adj 1000, to free 35972kB on behalf of 'syz-executor.4' (32732) because cache 47288kB is below limit 65536kB for oom_score_adj 12 Free memory is -13324kB above reserved lowmemorykiller: Killing 'syz-executor.1' (3946) (tgid 3946), adj 1000, to free 35968kB on behalf of 'syz-executor.4' (32732) because cache 46888kB is below limit 65536kB for oom_score_adj 12 Free memory is -13244kB above reserved lowmemorykiller: Killing 'syz-executor.5' (4204) (tgid 4204), adj 1000, to free 35960kB on behalf of 'syz-executor.4' (32732) because cache 45988kB is below limit 65536kB for oom_score_adj 12 Free memory is -13236kB above reserved lowmemorykiller: Killing 'syz-executor.5' (4218) (tgid 4218), adj 1000, to free 35960kB on behalf of 'syz-executor.4' (32732) because cache 45588kB is below limit 65536kB for oom_score_adj 12 Free memory is -13104kB above reserved lowmemorykiller: Killing 'syz-executor.4' (32732) (tgid 32725), adj 1000, to free 35952kB on behalf of 'kswapd0' (33) because cache 44288kB is below limit 65536kB for oom_score_adj 12 Free memory is -12440kB above reserved lowmemorykiller: Killing 'syz-executor.5' (2179) (tgid 2179), adj 1000, to free 35956kB on behalf of 'syz-executor.4' (32732) because cache 44488kB is below limit 65536kB for oom_score_adj 12 Free memory is -13140kB above reserved lowmemorykiller: Killing 'syz-executor.1' (27022) (tgid 27022), adj 1000, to free 34980kB on behalf of 'kswapd0' (33) because cache 236kB is below limit 6144kB for oom_score_adj 0 Free memory is -13504kB above reserved BUG: sleeping function called from invalid context at kernel/fork.c:905 in_atomic(): 0, irqs_disabled(): 0, pid: 33, name: kswapd0 INFO: lockdep is turned off. Preemption disabled at: [<00000000bed2081c>] spin_lock include/linux/spinlock.h:302 [inline] [<00000000bed2081c>] task_lock include/linux/sched.h:3217 [inline] [<00000000bed2081c>] get_task_mm+0x20/0xc0 kernel/fork.c:1012 CPU: 1 PID: 33 Comm: kswapd0 Tainted: G W 4.9.189+ #22 ffff8801d840f7c0 ffffffff81b65c01 0000000000000000 0000000000000001 ffff8801d95817c0 ffffffff810d1010 ffff8801d95817c0 ffff8801d840f7f8 ffffffff814018f3 ffff8801d95817c0 ffffffff82a39fc0 0000000000000389 Call Trace: [<00000000732f6af8>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000732f6af8>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<000000008e164ce6>] ___might_sleep.cold+0x1c1/0x1fa kernel/sched/core.c:8004 [<00000000ca66eb63>] __might_sleep+0x95/0x1a0 kernel/sched/core.c:7961 [<00000000d3898ca6>] mmput+0x28/0x370 kernel/fork.c:905 [<000000000a179654>] handle_lmk_event+0xea/0x8a0 drivers/staging/android/lowmemorykiller.c:111 [<00000000cd5516b5>] lowmem_scan+0x695/0xb50 drivers/staging/android/lowmemorykiller.c:345 [<000000005522d7a9>] do_shrink_slab mm/vmscan.c:399 [inline] [<000000005522d7a9>] shrink_slab.part.0+0x3cf/0xa20 mm/vmscan.c:502 [<00000000a71ad396>] shrink_slab mm/vmscan.c:466 [inline] [<00000000a71ad396>] shrink_node+0x1ed/0x750 mm/vmscan.c:2604 [<00000000dfa4a6a3>] kswapd_shrink_node mm/vmscan.c:3209 [inline] [<00000000dfa4a6a3>] balance_pgdat mm/vmscan.c:3329 [inline] [<00000000dfa4a6a3>] kswapd+0x7f8/0x13b0 mm/vmscan.c:3523 [<00000000b54ef77f>] kthread+0x278/0x310 kernel/kthread.c:211 [<00000000b20361f2>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 lowmemorykiller: Killing 'syz-executor.1' (13299) (tgid 13299), adj 1000, to free 34980kB on behalf of 'syz-executor.4' (32732) because cache 236kB is below limit 6144kB for oom_score_adj 0 Free memory is -13504kB above reserved lowmemorykiller: Killing 'syz-executor.1' (27068) (tgid 27068), adj 1000, to free 34980kB on behalf of 'udevd' (470) because cache 212kB is below limit 6144kB for oom_score_adj 0 Free memory is -13300kB above reserved BUG: sleeping function called from invalid context at kernel/fork.c:905 in_atomic(): 0, irqs_disabled(): 0, pid: 470, name: udevd INFO: lockdep is turned off. Preemption disabled at: [<00000000bed2081c>] spin_lock include/linux/spinlock.h:302 [inline] [<00000000bed2081c>] task_lock include/linux/sched.h:3217 [inline] [<00000000bed2081c>] get_task_mm+0x20/0xc0 kernel/fork.c:1012 CPU: 0 PID: 470 Comm: udevd Tainted: G W 4.9.189+ #22 ffff8801d305f3c8 ffffffff81b65c01 0000000000000000 0000000000000001 ffff8801d3ba17c0 ffffffff810d1010 ffff8801d3ba17c0 ffff8801d305f400 ffffffff814018f3 ffff8801d3ba17c0 ffffffff82a39fc0 0000000000000389 Call Trace: [<00000000732f6af8>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000732f6af8>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<000000008e164ce6>] ___might_sleep.cold+0x1c1/0x1fa kernel/sched/core.c:8004 [<00000000ca66eb63>] __might_sleep+0x95/0x1a0 kernel/sched/core.c:7961 [<00000000d3898ca6>] mmput+0x28/0x370 kernel/fork.c:905 [<000000000a179654>] handle_lmk_event+0xea/0x8a0 drivers/staging/android/lowmemorykiller.c:111 [<00000000cd5516b5>] lowmem_scan+0x695/0xb50 drivers/staging/android/lowmemorykiller.c:345 [<000000005522d7a9>] do_shrink_slab mm/vmscan.c:399 [inline] [<000000005522d7a9>] shrink_slab.part.0+0x3cf/0xa20 mm/vmscan.c:502 [<00000000a71ad396>] shrink_slab mm/vmscan.c:466 [inline] [<00000000a71ad396>] shrink_node+0x1ed/0x750 mm/vmscan.c:2604 [<00000000e135b2cb>] shrink_zones mm/vmscan.c:2751 [inline] [<00000000e135b2cb>] do_try_to_free_pages mm/vmscan.c:2793 [inline] [<00000000e135b2cb>] try_to_free_pages+0x397/0xbd0 mm/vmscan.c:3004 [<00000000081b0109>] __perform_reclaim mm/page_alloc.c:3332 [inline] [<00000000081b0109>] __alloc_pages_direct_reclaim mm/page_alloc.c:3354 [inline] [<00000000081b0109>] __alloc_pages_slowpath mm/page_alloc.c:3704 [inline] [<00000000081b0109>] __alloc_pages_nodemask+0x930/0x1a80 mm/page_alloc.c:3861 [<0000000061205cc9>] __alloc_pages include/linux/gfp.h:433 [inline] [<0000000061205cc9>] __alloc_pages_node include/linux/gfp.h:446 [inline] [<0000000061205cc9>] alloc_pages_node include/linux/gfp.h:460 [inline] [<0000000061205cc9>] __page_cache_alloc include/linux/pagemap.h:208 [inline] [<0000000061205cc9>] pagecache_get_page+0x248/0x740 mm/filemap.c:1367 [<00000000ca9d88ef>] filemap_fault+0xb1f/0x1360 mm/filemap.c:2331 [<0000000092cb9869>] ext4_filemap_fault+0x72/0xa0 fs/ext4/inode.c:5854 [<00000000b21ff0d4>] __do_fault+0x2a8/0x6c0 mm/memory.c:2855 [<00000000ac1fd62e>] do_read_fault mm/memory.c:3202 [inline] [<00000000ac1fd62e>] do_fault mm/memory.c:3338 [inline] [<00000000ac1fd62e>] handle_pte_fault mm/memory.c:3547 [inline] [<00000000ac1fd62e>] __handle_mm_fault mm/memory.c:3634 [inline] [<00000000ac1fd62e>] handle_mm_fault+0x11bc/0x2420 mm/memory.c:3671 [<000000004b80c762>] __do_page_fault+0x3f0/0xa60 arch/x86/mm/fault.c:1404 [<0000000082039956>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1467 [<00000000c8e8cfa3>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:956 lowmemorykiller: Killing 'syz-executor.4' (32732) (tgid 32725), adj 1000, to free 34980kB on behalf of 'syz-executor.4' (32732) because cache 184kB is below limit 6144kB for oom_score_adj 0 Free memory is -13220kB above reserved BUG: sleeping function called from invalid context at kernel/fork.c:905 in_atomic(): 0, irqs_disabled(): 0, pid: 32732, name: syz-executor.4 INFO: lockdep is turned off. Preemption disabled at: [<00000000bed2081c>] spin_lock include/linux/spinlock.h:302 [inline] [<00000000bed2081c>] task_lock include/linux/sched.h:3217 [inline] [<00000000bed2081c>] get_task_mm+0x20/0xc0 kernel/fork.c:1012 CPU: 0 PID: 32732 Comm: syz-executor.4 Tainted: G W 4.9.189+ #22 ffff8801c911f408 ffffffff81b65c01 0000000000000000 0000000000000001 ffff8801a4508000 ffffffff810d1010 ffff8801a4508000 ffff8801c911f440 ffffffff814018f3 ffff8801a4508000 ffffffff82a39fc0 0000000000000389 Call Trace: [<00000000732f6af8>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000732f6af8>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<000000008e164ce6>] ___might_sleep.cold+0x1c1/0x1fa kernel/sched/core.c:8004 [<00000000ca66eb63>] __might_sleep+0x95/0x1a0 kernel/sched/core.c:7961 [<00000000d3898ca6>] mmput+0x28/0x370 kernel/fork.c:905 [<000000000a179654>] handle_lmk_event+0xea/0x8a0 drivers/staging/android/lowmemorykiller.c:111 [<00000000cd5516b5>] lowmem_scan+0x695/0xb50 drivers/staging/android/lowmemorykiller.c:345 [<000000005522d7a9>] do_shrink_slab mm/vmscan.c:399 [inline] [<000000005522d7a9>] shrink_slab.part.0+0x3cf/0xa20 mm/vmscan.c:502 [<00000000a71ad396>] shrink_slab mm/vmscan.c:466 [inline] [<00000000a71ad396>] shrink_node+0x1ed/0x750 mm/vmscan.c:2604 [<00000000e135b2cb>] shrink_zones mm/vmscan.c:2751 [inline] [<00000000e135b2cb>] do_try_to_free_pages mm/vmscan.c:2793 [inline] [<00000000e135b2cb>] try_to_free_pages+0x397/0xbd0 mm/vmscan.c:3004 [<00000000081b0109>] __perform_reclaim mm/page_alloc.c:3332 [inline] [<00000000081b0109>] __alloc_pages_direct_reclaim mm/page_alloc.c:3354 [inline] [<00000000081b0109>] __alloc_pages_slowpath mm/page_alloc.c:3704 [inline] [<00000000081b0109>] __alloc_pages_nodemask+0x930/0x1a80 mm/page_alloc.c:3861 [<00000000a4ae64c2>] __alloc_pages include/linux/gfp.h:433 [inline] [<00000000a4ae64c2>] __alloc_pages_node include/linux/gfp.h:446 [inline] [<00000000a4ae64c2>] alloc_pages_node include/linux/gfp.h:460 [inline] [<00000000a4ae64c2>] __vmalloc_area_node mm/vmalloc.c:1648 [inline] [<00000000a4ae64c2>] __vmalloc_node_range+0x25b/0x610 mm/vmalloc.c:1706 [<000000009b87448c>] __vmalloc_node mm/vmalloc.c:1749 [inline] [<000000009b87448c>] __vmalloc_node_flags mm/vmalloc.c:1763 [inline] [<000000009b87448c>] vmalloc+0x5c/0x70 mm/vmalloc.c:1778 [<000000001568a07f>] xt_alloc_table_info+0xc8/0x100 net/netfilter/x_tables.c:997 [<00000000a3c00587>] do_replace net/ipv6/netfilter/ip6_tables.c:1175 [inline] [<00000000a3c00587>] do_ip6t_set_ctl+0x231/0x480 net/ipv6/netfilter/ip6_tables.c:1712 [<00000000b99fe1f3>] nf_sockopt net/netfilter/nf_sockopt.c:105 [inline] [<00000000b99fe1f3>] nf_setsockopt+0x6d/0xc0 net/netfilter/nf_sockopt.c:114 [<0000000077b17a00>] ipv6_setsockopt net/ipv6/ipv6_sockglue.c:922 [inline] [<0000000077b17a00>] ipv6_setsockopt+0x10b/0x140 net/ipv6/ipv6_sockglue.c:906 [<00000000e0819015>] tcp_setsockopt net/ipv4/tcp.c:2759 [inline] [<00000000e0819015>] tcp_setsockopt+0x8a/0xe0 net/ipv4/tcp.c:2753 [<0000000066814ced>] sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:2710 [<0000000074523ac2>] SYSC_setsockopt net/socket.c:1786 [inline] [<0000000074523ac2>] SyS_setsockopt+0x159/0x240 net/socket.c:1765 [<000000005a72bc08>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<00000000f05d55f8>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb lowmemorykiller: Killing 'syz-executor.4' (32732) (tgid 32725), adj 1000, to free 34980kB on behalf of 'syz-fuzzer' (2048) because cache 320kB is below limit 6144kB for oom_score_adj 0 Free memory is -13228kB above reserved BUG: sleeping function called from invalid context at kernel/fork.c:905 in_atomic(): 0, irqs_disabled(): 0, pid: 2048, name: syz-fuzzer INFO: lockdep is turned off. Preemption disabled at: [<00000000bed2081c>] spin_lock include/linux/spinlock.h:302 [inline] [<00000000bed2081c>] task_lock include/linux/sched.h:3217 [inline] [<00000000bed2081c>] get_task_mm+0x20/0xc0 kernel/fork.c:1012 CPU: 1 PID: 2048 Comm: syz-fuzzer Tainted: G W 4.9.189+ #22 ffff8801ce9e73c8 ffffffff81b65c01 0000000000000000 0000000000000001 ffff8801d11eaf80 ffffffff810d1010 ffff8801d11eaf80 ffff8801ce9e7400 ffffffff814018f3 ffff8801d11eaf80 ffffffff82a39fc0 0000000000000389 Call Trace: [<00000000732f6af8>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000732f6af8>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<000000008e164ce6>] ___might_sleep.cold+0x1c1/0x1fa kernel/sched/core.c:8004 [<00000000ca66eb63>] __might_sleep+0x95/0x1a0 kernel/sched/core.c:7961 [<00000000d3898ca6>] mmput+0x28/0x370 kernel/fork.c:905 [<000000000a179654>] handle_lmk_event+0xea/0x8a0 drivers/staging/android/lowmemorykiller.c:111 [<00000000cd5516b5>] lowmem_scan+0x695/0xb50 drivers/staging/android/lowmemorykiller.c:345 [<000000005522d7a9>] do_shrink_slab mm/vmscan.c:399 [inline] [<000000005522d7a9>] shrink_slab.part.0+0x3cf/0xa20 mm/vmscan.c:502 [<00000000a71ad396>] shrink_slab mm/vmscan.c:466 [inline] [<00000000a71ad396>] shrink_node+0x1ed/0x750 mm/vmscan.c:2604 [<00000000e135b2cb>] shrink_zones mm/vmscan.c:2751 [inline] [<00000000e135b2cb>] do_try_to_free_pages mm/vmscan.c:2793 [inline] [<00000000e135b2cb>] try_to_free_pages+0x397/0xbd0 mm/vmscan.c:3004 [<00000000081b0109>] __perform_reclaim mm/page_alloc.c:3332 [inline] [<00000000081b0109>] __alloc_pages_direct_reclaim mm/page_alloc.c:3354 [inline] [<00000000081b0109>] __alloc_pages_slowpath mm/page_alloc.c:3704 [inline] [<00000000081b0109>] __alloc_pages_nodemask+0x930/0x1a80 mm/page_alloc.c:3861 [<0000000061205cc9>] __alloc_pages include/linux/gfp.h:433 [inline] [<0000000061205cc9>] __alloc_pages_node include/linux/gfp.h:446 [inline] [<0000000061205cc9>] alloc_pages_node include/linux/gfp.h:460 [inline] [<0000000061205cc9>] __page_cache_alloc include/linux/pagemap.h:208 [inline] [<0000000061205cc9>] pagecache_get_page+0x248/0x740 mm/filemap.c:1367 [<00000000ca9d88ef>] filemap_fault+0xb1f/0x1360 mm/filemap.c:2331 [<0000000092cb9869>] ext4_filemap_fault+0x72/0xa0 fs/ext4/inode.c:5854 [<00000000b21ff0d4>] __do_fault+0x2a8/0x6c0 mm/memory.c:2855 [<00000000ac1fd62e>] do_read_fault mm/memory.c:3202 [inline] [<00000000ac1fd62e>] do_fault mm/memory.c:3338 [inline] [<00000000ac1fd62e>] handle_pte_fault mm/memory.c:3547 [inline] [<00000000ac1fd62e>] __handle_mm_fault mm/memory.c:3634 [inline] [<00000000ac1fd62e>] handle_mm_fault+0x11bc/0x2420 mm/memory.c:3671 [<000000004b80c762>] __do_page_fault+0x3f0/0xa60 arch/x86/mm/fault.c:1404 [<0000000082039956>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1467 [<00000000c8e8cfa3>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:956 lowmemorykiller: Killing 'syz-executor.4' (32732) (tgid 32725), adj 1000, to free 34980kB on behalf of 'syz-executor.4' (32732) because cache 192kB is below limit 6144kB for oom_score_adj 0 Free memory is -13224kB above reserved lowmemorykiller: Killing 'syz-executor.4' (32732) (tgid 32725), adj 1000, to free 34980kB on behalf of 'init' (1) because cache 192kB is below limit 6144kB for oom_score_adj 0 Free memory is -13224kB above reserved BUG: sleeping function called from invalid context at kernel/fork.c:905 in_atomic(): 0, irqs_disabled(): 0, pid: 32732, name: syz-executor.4 INFO: lockdep is turned off. Preemption disabled at: [<00000000bed2081c>] spin_lock include/linux/spinlock.h:302 [inline] [<00000000bed2081c>] task_lock include/linux/sched.h:3217 [inline] [<00000000bed2081c>] get_task_mm+0x20/0xc0 kernel/fork.c:1012 CPU: 1 PID: 32732 Comm: syz-executor.4 Tainted: G W 4.9.189+ #22 ffff8801c911f408 ffffffff81b65c01 0000000000000000 0000000000000001 ffff8801a4508000 ffffffff810d1010 ffff8801a4508000 ffff8801c911f440 ffffffff814018f3 ffff8801a4508000 ffffffff82a39fc0 0000000000000389 Call Trace: [<00000000732f6af8>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000732f6af8>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<000000008e164ce6>] ___might_sleep.cold+0x1c1/0x1fa kernel/sched/core.c:8004 [<00000000ca66eb63>] __might_sleep+0x95/0x1a0 kernel/sched/core.c:7961 [<00000000d3898ca6>] mmput+0x28/0x370 kernel/fork.c:905 [<000000000a179654>] handle_lmk_event+0xea/0x8a0 drivers/staging/android/lowmemorykiller.c:111 [<00000000cd5516b5>] lowmem_scan+0x695/0xb50 drivers/staging/android/lowmemorykiller.c:345 [<000000005522d7a9>] do_shrink_slab mm/vmscan.c:399 [inline] [<000000005522d7a9>] shrink_slab.part.0+0x3cf/0xa20 mm/vmscan.c:502 [<00000000a71ad396>] shrink_slab mm/vmscan.c:466 [inline] [<00000000a71ad396>] shrink_node+0x1ed/0x750 mm/vmscan.c:2604 [<00000000e135b2cb>] shrink_zones mm/vmscan.c:2751 [inline] [<00000000e135b2cb>] do_try_to_free_pages mm/vmscan.c:2793 [inline] [<00000000e135b2cb>] try_to_free_pages+0x397/0xbd0 mm/vmscan.c:3004 [<00000000081b0109>] __perform_reclaim mm/page_alloc.c:3332 [inline] [<00000000081b0109>] __alloc_pages_direct_reclaim mm/page_alloc.c:3354 [inline] [<00000000081b0109>] __alloc_pages_slowpath mm/page_alloc.c:3704 [inline] [<00000000081b0109>] __alloc_pages_nodemask+0x930/0x1a80 mm/page_alloc.c:3861 [<00000000a4ae64c2>] __alloc_pages include/linux/gfp.h:433 [inline] [<00000000a4ae64c2>] __alloc_pages_node include/linux/gfp.h:446 [inline] [<00000000a4ae64c2>] alloc_pages_node include/linux/gfp.h:460 [inline] [<00000000a4ae64c2>] __vmalloc_area_node mm/vmalloc.c:1648 [inline] [<00000000a4ae64c2>] __vmalloc_node_range+0x25b/0x610 mm/vmalloc.c:1706 [<000000009b87448c>] __vmalloc_node mm/vmalloc.c:1749 [inline] [<000000009b87448c>] __vmalloc_node_flags mm/vmalloc.c:1763 [inline] [<000000009b87448c>] vmalloc+0x5c/0x70 mm/vmalloc.c:1778 [<000000001568a07f>] xt_alloc_table_info+0xc8/0x100 net/netfilter/x_tables.c:997 [<00000000a3c00587>] do_replace net/ipv6/netfilter/ip6_tables.c:1175 [inline] [<00000000a3c00587>] do_ip6t_set_ctl+0x231/0x480 net/ipv6/netfilter/ip6_tables.c:1712 [<00000000b99fe1f3>] nf_sockopt net/netfilter/nf_sockopt.c:105 [inline] [<00000000b99fe1f3>] nf_setsockopt+0x6d/0xc0 net/netfilter/nf_sockopt.c:114 [<0000000077b17a00>] ipv6_setsockopt net/ipv6/ipv6_sockglue.c:922 [inline] [<0000000077b17a00>] ipv6_setsockopt+0x10b/0x140 net/ipv6/ipv6_sockglue.c:906 [<00000000e0819015>] tcp_setsockopt net/ipv4/tcp.c:2759 [inline] [<00000000e0819015>] tcp_setsockopt+0x8a/0xe0 net/ipv4/tcp.c:2753 [<0000000066814ced>] sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:2710 [<0000000074523ac2>] SYSC_setsockopt net/socket.c:1786 [inline] [<0000000074523ac2>] SyS_setsockopt+0x159/0x240 net/socket.c:1765 [<000000005a72bc08>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<00000000f05d55f8>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb lowmemorykiller: Killing 'syz-executor.4' (32732) (tgid 32725), adj 1000, to free 34980kB on behalf of 'syz-executor.4' (32732) because cache 160kB is below limit 6144kB for oom_score_adj 0 Free memory is -13316kB above reserved lowmemorykiller: Killing 'syz-executor.4' (32732) (tgid 32725), adj 1000, to free 34980kB on behalf of 'syz-fuzzer' (2048) because cache 160kB is below limit 6144kB for oom_score_adj 0 Free memory is -13316kB above reserved BUG: sleeping function called from invalid context at kernel/fork.c:905 in_atomic(): 0, irqs_disabled(): 0, pid: 32732, name: syz-executor.4 INFO: lockdep is turned off. Preemption disabled at: [<00000000bed2081c>] spin_lock include/linux/spinlock.h:302 [inline] [<00000000bed2081c>] task_lock include/linux/sched.h:3217 [inline] [<00000000bed2081c>] get_task_mm+0x20/0xc0 kernel/fork.c:1012 CPU: 1 PID: 32732 Comm: syz-executor.4 Tainted: G W 4.9.189+ #22 ffff8801c911f408 ffffffff81b65c01 0000000000000000 0000000000000001 ffff8801a4508000 ffffffff810d1010 ffff8801a4508000 ffff8801c911f440 ffffffff814018f3 ffff8801a4508000 ffffffff82a39fc0 0000000000000389 Call Trace: [<00000000732f6af8>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000732f6af8>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<000000008e164ce6>] ___might_sleep.cold+0x1c1/0x1fa kernel/sched/core.c:8004 [<00000000ca66eb63>] __might_sleep+0x95/0x1a0 kernel/sched/core.c:7961 [<00000000d3898ca6>] mmput+0x28/0x370 kernel/fork.c:905 [<000000000a179654>] handle_lmk_event+0xea/0x8a0 drivers/staging/android/lowmemorykiller.c:111 [<00000000cd5516b5>] lowmem_scan+0x695/0xb50 drivers/staging/android/lowmemorykiller.c:345 [<000000005522d7a9>] do_shrink_slab mm/vmscan.c:399 [inline] [<000000005522d7a9>] shrink_slab.part.0+0x3cf/0xa20 mm/vmscan.c:502 [<00000000a71ad396>] shrink_slab mm/vmscan.c:466 [inline] [<00000000a71ad396>] shrink_node+0x1ed/0x750 mm/vmscan.c:2604 [<00000000e135b2cb>] shrink_zones mm/vmscan.c:2751 [inline] [<00000000e135b2cb>] do_try_to_free_pages mm/vmscan.c:2793 [inline] [<00000000e135b2cb>] try_to_free_pages+0x397/0xbd0 mm/vmscan.c:3004 [<00000000081b0109>] __perform_reclaim mm/page_alloc.c:3332 [inline] [<00000000081b0109>] __alloc_pages_direct_reclaim mm/page_alloc.c:3354 [inline] [<00000000081b0109>] __alloc_pages_slowpath mm/page_alloc.c:3704 [inline] [<00000000081b0109>] __alloc_pages_nodemask+0x930/0x1a80 mm/page_alloc.c:3861 [<00000000a4ae64c2>] __alloc_pages include/linux/gfp.h:433 [inline] [<00000000a4ae64c2>] __alloc_pages_node include/linux/gfp.h:446 [inline] [<00000000a4ae64c2>] alloc_pages_node include/linux/gfp.h:460 [inline] [<00000000a4ae64c2>] __vmalloc_area_node mm/vmalloc.c:1648 [inline] [<00000000a4ae64c2>] __vmalloc_node_range+0x25b/0x610 mm/vmalloc.c:1706 [<000000009b87448c>] __vmalloc_node mm/vmalloc.c:1749 [inline] [<000000009b87448c>] __vmalloc_node_flags mm/vmalloc.c:1763 [inline] [<000000009b87448c>] vmalloc+0x5c/0x70 mm/vmalloc.c:1778 [<000000001568a07f>] xt_alloc_table_info+0xc8/0x100 net/netfilter/x_tables.c:997 [<00000000a3c00587>] do_replace net/ipv6/netfilter/ip6_tables.c:1175 [inline] [<00000000a3c00587>] do_ip6t_set_ctl+0x231/0x480 net/ipv6/netfilter/ip6_tables.c:1712 [<00000000b99fe1f3>] nf_sockopt net/netfilter/nf_sockopt.c:105 [inline] [<00000000b99fe1f3>] nf_setsockopt+0x6d/0xc0 net/netfilter/nf_sockopt.c:114