lowmemorykiller: Killing 'syz-executor.5' (14127) (tgid 14127), adj 1000, to free 52940kB on behalf of 'kswapd0' (33) because cache 65384kB is below limit 65536kB for oom_score_adj 12 Free memory is 18304kB 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: [<0000000083c748e3>] 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: 470183 hardirqs last enabled at (470183): [<0000000086ab77f2>] vprintk_emit+0x25c/0x6f0 kernel/printk/printk.c:1897 hardirqs last disabled at (470182): [<000000008bface91>] vprintk_emit+0x6d/0x6f0 kernel/printk/printk.c:1801 softirqs last enabled at (470124): [<00000000285a87be>] __do_softirq+0x474/0x964 kernel/softirq.c:314 softirqs last disabled at (470117): [<00000000a6aa4e2b>] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (470117): [<00000000a6aa4e2b>] 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: [<0000000080ec74b6>] shrink_slab.part.0+0xb2/0xa20 mm/vmscan.c:472 stack backtrace: CPU: 0 PID: 33 Comm: kswapd0 Not tainted 4.9.194+ #0 ffff8801d8427420 ffffffff81b67001 00000000000000f0 ffff8801d8418000 ffffffff83cb0b40 ffff8801d84188f8 ffffffff84252000 ffff8801d8427498 ffffffff81408710 0000000000000000 ffffffff00000001 0000000000000001 Call Trace: [<00000000b1480d57>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000b1480d57>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<00000000ac290f85>] print_usage_bug kernel/locking/lockdep.c:2387 [inline] [<00000000ac290f85>] print_usage_bug.cold+0x452/0x5a2 kernel/locking/lockdep.c:2354 [<00000000149b09d1>] valid_state kernel/locking/lockdep.c:2400 [inline] [<00000000149b09d1>] mark_lock_irq kernel/locking/lockdep.c:2602 [inline] [<00000000149b09d1>] mark_lock+0x6c7/0x12e0 kernel/locking/lockdep.c:3065 [<000000001fd3f998>] mark_irqflags kernel/locking/lockdep.c:2958 [inline] [<000000001fd3f998>] __lock_acquire+0x5be/0x4390 kernel/locking/lockdep.c:3302 [<000000008294bc33>] lock_acquire+0x133/0x3d0 kernel/locking/lockdep.c:3756 [<00000000ba264b1a>] down_read+0x44/0xb0 kernel/locking/rwsem.c:22 [<0000000083c748e3>] get_cmdline+0xa3/0x2d0 mm/util.c:641 [<00000000546d1ad9>] handle_lmk_event+0x169/0x920 drivers/staging/android/lowmemorykiller.c:116 [<000000000e6b9f72>] lowmem_scan+0x6f3/0xb70 drivers/staging/android/lowmemorykiller.c:354 [<00000000f8ca8b09>] do_shrink_slab mm/vmscan.c:399 [inline] [<00000000f8ca8b09>] shrink_slab.part.0+0x3cf/0xa20 mm/vmscan.c:502 [<00000000e772e83e>] shrink_slab mm/vmscan.c:466 [inline] [<00000000e772e83e>] shrink_node+0x1ed/0x750 mm/vmscan.c:2604 [<00000000c2e98a38>] kswapd_shrink_node mm/vmscan.c:3209 [inline] [<00000000c2e98a38>] balance_pgdat mm/vmscan.c:3329 [inline] [<00000000c2e98a38>] kswapd+0x7f8/0x13b0 mm/vmscan.c:3523 [<000000002227fee7>] kthread+0x278/0x310 kernel/kthread.c:211 [<00000000dd86b95b>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 lowmemorykiller: Killing 'syz-executor.5' (10950) (tgid 10950), adj 1000, to free 52380kB on behalf of 'kswapd0' (33) because cache 65384kB is below limit 65536kB for oom_score_adj 12 Free memory is 43660kB above reserved lowmemorykiller: Killing 'syz-executor.1' (12607) (tgid 12607), adj 1000, to free 52380kB on behalf of 'kswapd0' (33) because cache 65384kB is below limit 65536kB for oom_score_adj 12 Free memory is 61832kB above reserved lowmemorykiller: Killing 'syz-executor.5' (10866) (tgid 10866), adj 1000, to free 52372kB on behalf of 'kswapd0' (33) because cache 65240kB is below limit 65536kB for oom_score_adj 12 Free memory is 65512kB above reserved lowmemorykiller: Killing 'syz-executor.5' (10890) (tgid 10890), adj 1000, to free 52372kB on behalf of 'kswapd0' (33) because cache 65240kB is below limit 65536kB for oom_score_adj 12 Free memory is 65016kB above reserved selinux_nlmsg_perm: 913 callbacks suppressed SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13617 comm=syz-executor.3 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13616 comm=syz-executor.2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13616 comm=syz-executor.2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13616 comm=syz-executor.2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13616 comm=syz-executor.2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13616 comm=syz-executor.2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13616 comm=syz-executor.2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13616 comm=syz-executor.2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13616 comm=syz-executor.2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13616 comm=syz-executor.2 lowmemorykiller: Killing 'syz-executor.5' (11030) (tgid 11030), adj 1000, to free 52364kB on behalf of 'syz-executor.1' (13724) because cache 65444kB is below limit 65536kB for oom_score_adj 12 Free memory is 13668kB above reserved lowmemorykiller: Killing 'syz-executor.5' (11091) (tgid 11091), adj 1000, to free 52364kB on behalf of 'syz-executor.1' (13724) because cache 65444kB is below limit 65536kB for oom_score_adj 12 Free memory is 24808kB above reserved lowmemorykiller: Killing 'syz-executor.5' (11133) (tgid 11133), adj 1000, to free 52364kB on behalf of 'kswapd0' (33) because cache 65452kB is below limit 65536kB for oom_score_adj 12 Free memory is 14648kB above reserved lowmemorykiller: Killing 'syz-executor.5' (11133) (tgid 11133), adj 1000, to free 52364kB on behalf of 'syz-executor.1' (13803) because cache 65352kB is below limit 65536kB for oom_score_adj 12 Free memory is 14748kB above reserved lowmemorykiller: Killing 'syz-executor.5' (11179) (tgid 11179), adj 1000, to free 52364kB on behalf of 'kswapd0' (33) because cache 63752kB is below limit 65536kB for oom_score_adj 12 Free memory is 29032kB above reserved lowmemorykiller: Killing 'syz-executor.5' (11234) (tgid 11234), adj 1000, to free 52364kB on behalf of 'kswapd0' (33) because cache 63716kB is below limit 65536kB for oom_score_adj 12 Free memory is 39124kB above reserved lowmemorykiller: Killing 'syz-executor.5' (11328) (tgid 11328), adj 1000, to free 52364kB on behalf of 'kswapd0' (33) because cache 63716kB is below limit 65536kB for oom_score_adj 12 Free memory is 49224kB above reserved selinux_nlmsg_perm: 1400 callbacks suppressed SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13818 comm=syz-executor.3 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13819 comm=syz-executor.4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13819 comm=syz-executor.4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13819 comm=syz-executor.4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13819 comm=syz-executor.4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13819 comm=syz-executor.4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13819 comm=syz-executor.4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13819 comm=syz-executor.4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13819 comm=syz-executor.4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=13819 comm=syz-executor.4