lowmemorykiller: Killing 'syz-executor453' (2050) (tgid 2050), adj 1000, to free 48kB on behalf of 'syz-executor453' (2055) because cache 33972kB is below limit 65536kB for oom_score_adj 12 Free memory is -13468kB above reserved ================================= [ INFO: inconsistent lock state ] 4.9.190+ #5 Not tainted --------------------------------- inconsistent {RECLAIM_FS-ON-W} -> {IN-RECLAIM_FS-R} usage. syz-executor453/2055 [HC0[0]:SC0[0]:HE1:SE1] takes: (&mm->mmap_sem){+++++?}, at: [<00000000c7d253e7>] 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: 560125 hardirqs last enabled at (560125): [<0000000082e0186d>] vprintk_emit+0x25c/0x6f0 kernel/printk/printk.c:1897 hardirqs last disabled at (560124): [<00000000cce80318>] vprintk_emit+0x6d/0x6f0 kernel/printk/printk.c:1801 softirqs last enabled at (273928): [<000000007b2366b0>] __do_softirq+0x474/0x964 kernel/softirq.c:314 softirqs last disabled at (273921): [<0000000015f4ef23>] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (273921): [<0000000015f4ef23>] 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 syz-executor453/2055: #0: (shrinker_rwsem){++++..}, at: [<000000004ca3ee1d>] shrink_slab.part.0+0xb2/0xa20 mm/vmscan.c:472 stack backtrace: CPU: 1 PID: 2055 Comm: syz-executor453 Not tainted 4.9.190+ #5 ffff8801cf11f070 ffffffff81b65c51 00000000000000f0 ffff8801d1862f80 ffffffff83caf950 ffff8801d1863878 ffffffff84250fc0 ffff8801cf11f0e8 ffffffff81408380 0000000000000000 ffffffff00000001 0000000000000001 Call Trace: [<00000000bafb2bb5>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000bafb2bb5>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<000000001d6f8e95>] print_usage_bug kernel/locking/lockdep.c:2387 [inline] [<000000001d6f8e95>] print_usage_bug.cold+0x452/0x5a2 kernel/locking/lockdep.c:2354 [<000000005b6c6366>] valid_state kernel/locking/lockdep.c:2400 [inline] [<000000005b6c6366>] mark_lock_irq kernel/locking/lockdep.c:2602 [inline] [<000000005b6c6366>] mark_lock+0x6c7/0x12e0 kernel/locking/lockdep.c:3065 [<0000000034700fa9>] mark_irqflags kernel/locking/lockdep.c:2958 [inline] [<0000000034700fa9>] __lock_acquire+0x5be/0x4390 kernel/locking/lockdep.c:3302 [<000000007800aa4f>] lock_acquire+0x133/0x3d0 kernel/locking/lockdep.c:3756 [<00000000d8e7dc67>] down_read+0x44/0xb0 kernel/locking/rwsem.c:22 [<00000000c7d253e7>] get_cmdline+0xa3/0x2d0 mm/util.c:641 [<0000000024a46c49>] handle_lmk_event+0x169/0x920 drivers/staging/android/lowmemorykiller.c:116 [<00000000b8e2d727>] lowmem_scan+0x6f3/0xb70 drivers/staging/android/lowmemorykiller.c:354 [<00000000f4b31cd4>] do_shrink_slab mm/vmscan.c:399 [inline] [<00000000f4b31cd4>] shrink_slab.part.0+0x3cf/0xa20 mm/vmscan.c:502 [<00000000850afbc0>] shrink_slab mm/vmscan.c:466 [inline] [<00000000850afbc0>] shrink_node+0x1ed/0x750 mm/vmscan.c:2604 [<00000000eed8a985>] shrink_zones mm/vmscan.c:2751 [inline] [<00000000eed8a985>] do_try_to_free_pages mm/vmscan.c:2793 [inline] [<00000000eed8a985>] try_to_free_pages+0x397/0xbd0 mm/vmscan.c:3004 [<00000000ef7bc9ee>] __perform_reclaim mm/page_alloc.c:3332 [inline] [<00000000ef7bc9ee>] __alloc_pages_direct_reclaim mm/page_alloc.c:3354 [inline] [<00000000ef7bc9ee>] __alloc_pages_slowpath mm/page_alloc.c:3704 [inline] [<00000000ef7bc9ee>] __alloc_pages_nodemask+0x930/0x1a80 mm/page_alloc.c:3861 [<000000004f3b4ff8>] __alloc_pages include/linux/gfp.h:433 [inline] [<000000004f3b4ff8>] __alloc_pages_node include/linux/gfp.h:446 [inline] [<000000004f3b4ff8>] alloc_pages_node include/linux/gfp.h:460 [inline] [<000000004f3b4ff8>] __vmalloc_area_node mm/vmalloc.c:1648 [inline] [<000000004f3b4ff8>] __vmalloc_node_range+0x25b/0x610 mm/vmalloc.c:1706 [<00000000d288a766>] __vmalloc_node mm/vmalloc.c:1755 [inline] [<00000000d288a766>] __vmalloc_node_flags mm/vmalloc.c:1769 [inline] [<00000000d288a766>] vmalloc+0x5c/0x70 mm/vmalloc.c:1784 [<000000009573a016>] xt_alloc_table_info+0xc8/0x100 net/netfilter/x_tables.c:997 [<00000000d0bc43d6>] do_replace net/ipv4/netfilter/ip_tables.c:1146 [inline] [<00000000d0bc43d6>] do_ipt_set_ctl+0x231/0x470 net/ipv4/netfilter/ip_tables.c:1693 [<0000000062076a6c>] nf_sockopt net/netfilter/nf_sockopt.c:105 [inline] [<0000000062076a6c>] nf_setsockopt+0x6d/0xc0 net/netfilter/nf_sockopt.c:114 [<00000000eda74df4>] ip_setsockopt net/ipv4/ip_sockglue.c:1247 [inline] [<00000000eda74df4>] ip_setsockopt+0x8a/0xa0 net/ipv4/ip_sockglue.c:1232 [<00000000c031895a>] udp_setsockopt+0x4e/0x90 net/ipv4/udp.c:2114 [<0000000007df589f>] sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:2710 [<00000000239a3a7e>] SYSC_setsockopt net/socket.c:1786 [inline] [<00000000239a3a7e>] SyS_setsockopt+0x159/0x240 net/socket.c:1765 [<000000004b113924>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<000000003e950e1a>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb oom_reaper: reaped process 2050 (syz-executor453), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB syz-executor453: vmalloc: allocation failure, allocated 1285128192 of 3993182208 bytes, mode:0x24000c2(GFP_KERNEL|__GFP_HIGHMEM) CPU: 0 PID: 2050 Comm: syz-executor453 Not tainted 4.9.190+ #5 ffff8801cf18fa10 ffffffff81b65c51 1ffff10039e31f44 dffffc0000000000 ffffffff82aab280 0000000000000000 0000000000400000 ffff8801cf18fb38 ffffffff81507d6c 0000000041b58ab3 ffffffff82e3b320 ffffffff81431970 Call Trace: [<00000000bafb2bb5>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000bafb2bb5>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<00000000b2ca73c7>] warn_alloc.cold+0x76/0x93 mm/page_alloc.c:3069 [<000000007c714b26>] __vmalloc_area_node mm/vmalloc.c:1665 [inline] [<000000007c714b26>] __vmalloc_node_range+0x404/0x610 mm/vmalloc.c:1706 [<00000000d288a766>] __vmalloc_node mm/vmalloc.c:1755 [inline] [<00000000d288a766>] __vmalloc_node_flags mm/vmalloc.c:1769 [inline] [<00000000d288a766>] vmalloc+0x5c/0x70 mm/vmalloc.c:1784 [<000000009573a016>] xt_alloc_table_info+0xc8/0x100 net/netfilter/x_tables.c:997 [<00000000d0bc43d6>] do_replace net/ipv4/netfilter/ip_tables.c:1146 [inline] [<00000000d0bc43d6>] do_ipt_set_ctl+0x231/0x470 net/ipv4/netfilter/ip_tables.c:1693 [<0000000062076a6c>] nf_sockopt net/netfilter/nf_sockopt.c:105 [inline] [<0000000062076a6c>] nf_setsockopt+0x6d/0xc0 net/netfilter/nf_sockopt.c:114 [<00000000eda74df4>] ip_setsockopt net/ipv4/ip_sockglue.c:1247 [inline] [<00000000eda74df4>] ip_setsockopt+0x8a/0xa0 net/ipv4/ip_sockglue.c:1232 [<00000000c031895a>] udp_setsockopt+0x4e/0x90 net/ipv4/udp.c:2114 [<0000000007df589f>] sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:2710 [<00000000239a3a7e>] SYSC_setsockopt net/socket.c:1786 [inline] [<00000000239a3a7e>] SyS_setsockopt+0x159/0x240 net/socket.c:1765 [<000000004b113924>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<000000003e950e1a>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Mem-Info: active_anon:3598 inactive_anon:40 isolated_anon:0 active_file:3 inactive_file:11 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:4255 slab_unreclaimable:56262 mapped:13 shmem:48 pagetables:359 bounce:0 free:508 free_pcp:7 free_cma:0 Node 0 active_anon:14392kB inactive_anon:160kB active_file:12kB inactive_file:44kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:52kB dirty:0kB writeback:0kB shmem:192kB writeback_tmp:0kB unstable:0kB pages_scanned:0 all_unreclaimable? no DMA32 free:4kB min:4696kB low:7712kB high:10728kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3145324kB managed:3020100kB mlocked:0kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB Normal free:2028kB min:5580kB low:9168kB high:12756kB active_anon:14392kB inactive_anon:160kB active_file:12kB inactive_file:44kB unevictable:0kB writepending:0kB present:4718592kB managed:3589316kB mlocked:0kB slab_reclaimable:17020kB slab_unreclaimable:225048kB kernel_stack:3456kB pagetables:1436kB bounce:0kB free_pcp:28kB local_pcp:28kB free_cma:0kB DMA32: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 0kB 0 pages in swap cache Swap cache stats: add 0, delete 0, find 0/0 Free swap = 0kB Total swap = 0kB 1965979 pages RAM 0 pages HighMem/MovableOnly 313625 pages reserved syz-executor453 invoked oom-killer: gfp_mask=0x24002c2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_NOWARN), nodemask=0, order=0, oom_score_adj=1000 CPU: 1 PID: 2058 Comm: syz-executor453 Not tainted 4.9.190+ #5 ffff8801c5217738 ffffffff81b65c51 ffff8801c5217a90 ffffffff833f1470 00000000000003e8 ffff8801c5217aa8 0000000000000000 ffff8801c52177b8 ffffffff81506ab4 0000000000000000 00000000000003e8 ffffffff82828dc5 Call Trace: [<00000000bafb2bb5>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000bafb2bb5>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<00000000d6399330>] dump_header.isra.0+0x142/0x74c mm/oom_kill.c:417 [<00000000ad675666>] oom_kill_process.cold+0xd/0xa74 mm/oom_kill.c:852 [<00000000a85302db>] out_of_memory mm/oom_kill.c:1069 [inline] [<00000000a85302db>] out_of_memory+0x29b/0xea0 mm/oom_kill.c:1009 [<000000009b08fc8b>] __alloc_pages_may_oom mm/page_alloc.c:3136 [inline] [<000000009b08fc8b>] __alloc_pages_slowpath mm/page_alloc.c:3750 [inline] [<000000009b08fc8b>] __alloc_pages_nodemask+0x1730/0x1a80 mm/page_alloc.c:3861 [<000000004f3b4ff8>] __alloc_pages include/linux/gfp.h:433 [inline] [<000000004f3b4ff8>] __alloc_pages_node include/linux/gfp.h:446 [inline] [<000000004f3b4ff8>] alloc_pages_node include/linux/gfp.h:460 [inline] [<000000004f3b4ff8>] __vmalloc_area_node mm/vmalloc.c:1648 [inline] [<000000004f3b4ff8>] __vmalloc_node_range+0x25b/0x610 mm/vmalloc.c:1706 [<00000000d288a766>] __vmalloc_node mm/vmalloc.c:1755 [inline] [<00000000d288a766>] __vmalloc_node_flags mm/vmalloc.c:1769 [inline] [<00000000d288a766>] vmalloc+0x5c/0x70 mm/vmalloc.c:1784 [<000000009573a016>] xt_alloc_table_info+0xc8/0x100 net/netfilter/x_tables.c:997 [<00000000d0bc43d6>] do_replace net/ipv4/netfilter/ip_tables.c:1146 [inline] [<00000000d0bc43d6>] do_ipt_set_ctl+0x231/0x470 net/ipv4/netfilter/ip_tables.c:1693 [<0000000062076a6c>] nf_sockopt net/netfilter/nf_sockopt.c:105 [inline] [<0000000062076a6c>] nf_setsockopt+0x6d/0xc0 net/netfilter/nf_sockopt.c:114 [<00000000eda74df4>] ip_setsockopt net/ipv4/ip_sockglue.c:1247 [inline] [<00000000eda74df4>] ip_setsockopt+0x8a/0xa0 net/ipv4/ip_sockglue.c:1232 [<00000000c031895a>] udp_setsockopt+0x4e/0x90 net/ipv4/udp.c:2114 [<0000000007df589f>] sock_common_setsockopt+0x9a/0xe0 net/core/sock.c:2710 [<00000000239a3a7e>] SYSC_setsockopt net/socket.c:1786 [inline] [<00000000239a3a7e>] SyS_setsockopt+0x159/0x240 net/socket.c:1765 lowmemorykiller: Killing 'syz-executor453' (2055) (tgid 2055), adj 1000, to free 48kB on behalf of 'kswapd0' (33) because cache 260kB is below limit 6144kB for oom_score_adj 0 Free memory is -6696kB above reserved [<000000004b113924>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<000000003e950e1a>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Mem-Info: active_anon:3591 inactive_anon:40 isolated_anon:0 active_file:35 inactive_file:35 isolated_file:0 unevictable:0 dirty:0 writeback:0 unstable:0 slab_reclaimable:4256 slab_unreclaimable:56268 mapped:2 shmem:48 pagetables:354 bounce:0 free:6225 free_pcp:0 free_cma:0 Node 0 active_anon:14364kB inactive_anon:160kB active_file:12kB inactive_file:44kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:92kB dirty:0kB writeback:0kB shmem:192kB writeback_tmp:0kB unstable:0kB pages_scanned:11 all_unreclaimable? no DMA32 free:18716kB min:4696kB low:7712kB high:10728kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3145324kB managed:3020100kB mlocked:0kB slab_reclaimable:0kB slab_unreclaimable:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 3505 3505 Normal free:5492kB min:5580kB low:9168kB high:12756kB active_anon:14364kB inactive_anon:160kB active_file:24kB inactive_file:180kB unevictable:0kB writepending:0kB present:4718592kB managed:3589316kB mlocked:0kB slab_reclaimable:17024kB slab_unreclaimable:225088kB kernel_stack:3424kB pagetables:1416kB bounce:0kB free_pcp:120kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 0 DMA32: 1*4kB (M) 3*8kB (M) 1*16kB (M) 1*32kB (M) 1*64kB (U) 3*128kB (UM) 3*256kB (UM) 0*512kB 1*1024kB (M) 2*2048kB (U) 3*4096kB (U) = 18700kB Normal: 263*4kB (MH) 114*8kB (MH) 52*16kB (UMH) 39*32kB (UMH) 7*64kB (UMH) 3*128kB (H) 0*256kB 1*512kB (H) 0*1024kB 0*2048kB 0*4096kB = 5388kB 0 pages in swap cache Swap cache stats: add 0, delete 0, find 0/0 Free swap = 0kB Total swap = 0kB 1965979 pages RAM 0 pages HighMem/MovableOnly 313625 pages reserved [ pid ] uid tgid total_vm rss nr_ptes nr_pmds swapents oom_score_adj name [ 470] 0 470 5384 177 16 3 0 -1000 udevd [ 591] 0 591 5746 537 16 3 0 -1000 udevd [ 592] 0 592 5383 177 15 3 0 -1000 udevd [ 1762] 0 1762 2492 572 10 3 0 0 dhclient [ 1895] 0 1895 14231 151 23 3 0 0 rsyslogd [ 1948] 0 1948 4724 52 15 3 0 0 cron [ 1968] 0 1968 3735 45 11 3 0 0 mcstransd [ 1970] 0 1970 12926 1227 28 3 0 0 restorecond [ 1996] 0 1996 12489 153 28 3 0 -1000 sshd [ 2026] 0 2026 3648 40 13 3 0 0 getty [ 2039] 0 2039 3648 43 12 3 0 0 getty [ 2040] 0 2040 3648 42 13 3 0 0 getty [ 2041] 0 2041 3648 42 13 3 0 0 getty [ 2042] 0 2042 3648 42 13 3 0 0 getty [ 2043] 0 2043 3648 42 13 3 0 0 getty [ 2044] 0 2044 3648 42 13 3 0 0 getty [ 2045] 0 2045 17820 197 39 3 0 0 sshd [ 2047] 0 2047 4380 1 4 2 0 0 syz-executor453 [ 2048] 0 2048 4380 12 4 2 0 0 syz-executor453 [ 2049] 0 2049 4380 12 4 2 0 0 syz-executor453 [ 2051] 0 2051 4380 12 4 2 0 0 syz-executor453 [ 2052] 0 2052 4380 12 4 2 0 0 syz-executor453 [ 2053] 0 2053 4380 12 4 2 0 0 syz-executor453 [ 2054] 0 2054 4380 12 4 2 0 0 syz-executor453 [ 2055] 0 2055 4380 12 5 2 0 1000 syz-executor453 [ 2056] 0 2056 4380 12 5 2 0 1000 syz-executor453 [ 2057] 0 2057 4380 12 5 2 0 1000 syz-executor453 [ 2058] 0 2058 4380 12 5 2 0 1000 syz-executor453 [ 2059] 0 2059 4380 12 5 2 0 1000 syz-executor453 Out of memory: Kill process 2055 (syz-executor453) score 999 or sacrifice child Killed process 2055 (syz-executor453) total-vm:17520kB, anon-rss:48kB, file-rss:0kB, shmem-rss:0kB syz-executor453: [ 25.084379] oom_reaper: reaped process 2055 (syz-executor453), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB rsyslogd invoked oom-killer: gfp_mask=0x24200ca(GFP_HIGHUSER_MOVABLE), nodemask=0, order=0, oom_score_adj=0 CPU: 1 PID: 1898 Comm: rsyslogd Not tainted 4.9.190+ #5 ffff8801d3e6f6f0 ffffffff81b65c51 ffff8801d3e6fa48 ffffffff833f1470 0000000000000000 ffff8801d3e6fa60 0000000000000000 ffff8801d3e6f770 ffffffff81506ab4 0000000000000000 0000000000000000 ffffffff82828dc5Call Trace: [<00000000bafb2bb5>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000bafb2bb5>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<00000000d6399330>] dump_header.isra.0+0x142/0x74c mm/oom_kill.c:417 [<00000000ad675666>] oom_kill_process.cold+0xd/0xa74 mm/oom_kill.c:852 [<00000000a85302db>] out_of_memory mm/oom_kill.c:1069 [inline] [<00000000a85302db>] out_of_memory+0x29b/0xea0 mm/oom_kill.c:1009 [<000000009b08fc8b>] __alloc_pages_may_oom mm/page_alloc.c:3136 [inline] [<000000009b08fc8b>] __alloc_pages_slowpath mm/page_alloc.c:3750 [inline] [<000000009b08fc8b>] __alloc_pages_nodemask+0x1730/0x1a80 mm/page_alloc.c:3861 [<0000000025830783>] __alloc_pages include/linux/gfp.h:433 [inline] [<0000000025830783>] __alloc_pages_node include/linux/gfp.h:446 [inline] [<0000000025830783>] alloc_pages_node include/linux/gfp.h:460 [inline] [<0000000025830783>] __page_cache_alloc include/linux/pagemap.h:208 [inline] [<0000000025830783>] pagecache_get_page+0x248/0x740 mm/filemap.c:1367 [<00000000e46c05e1>] filemap_fault+0xb1f/0x1360 mm/filemap.c:2331 [<00000