lowmemorykiller: Killing 'syz-executor.1' (26328) (tgid 26326), adj 1000, to free 35900kB on behalf of 'kswapd0' (33) because cache 54536kB is below limit 65536kB for oom_score_adj 12 Free memory is 45732kB 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: [<00000000034652f7>] 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: 213421 hardirqs last enabled at (213421): [<00000000a4cb08c4>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:170 [inline] hardirqs last enabled at (213421): [<00000000a4cb08c4>] _raw_spin_unlock_irq+0x28/0x60 kernel/locking/spinlock.c:199 hardirqs last disabled at (213420): [<000000005939dcb3>] __schedule+0x184/0x1f10 kernel/sched/core.c:3432 softirqs last enabled at (206660): [<00000000c758d2a1>] __do_softirq+0x474/0x964 kernel/softirq.c:314 softirqs last disabled at (206641): [<000000000e679f9c>] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (206641): [<000000000e679f9c>] 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: [<00000000d40cb812>] shrink_slab.part.0+0xb2/0xa20 mm/vmscan.c:472 stack backtrace: CPU: 1 PID: 33 Comm: kswapd0 Not tainted 4.9.194+ #0 ffff8801d8407420 ffffffff81b67001 00000000000000f0 ffff8801d98f97c0 ffffffff83cb1200 ffff8801d98fa0b8 ffffffff84252000 ffff8801d8407498 ffffffff81408710 0000000000000000 ffffffff00000001 0000000000000001 Call Trace: [<000000006d4913f3>] __dump_stack lib/dump_stack.c:15 [inline] [<000000006d4913f3>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<000000004eb696c3>] print_usage_bug kernel/locking/lockdep.c:2387 [inline] [<000000004eb696c3>] print_usage_bug.cold+0x452/0x5a2 kernel/locking/lockdep.c:2354 [<00000000cdc82870>] valid_state kernel/locking/lockdep.c:2400 [inline] [<00000000cdc82870>] mark_lock_irq kernel/locking/lockdep.c:2602 [inline] [<00000000cdc82870>] mark_lock+0x6c7/0x12e0 kernel/locking/lockdep.c:3065 [<000000004d0f12bb>] mark_irqflags kernel/locking/lockdep.c:2958 [inline] [<000000004d0f12bb>] __lock_acquire+0x5be/0x4390 kernel/locking/lockdep.c:3302 [<0000000049098593>] lock_acquire+0x133/0x3d0 kernel/locking/lockdep.c:3756 [<00000000c2a8becd>] down_read+0x44/0xb0 kernel/locking/rwsem.c:22 [<00000000034652f7>] get_cmdline+0xa3/0x2d0 mm/util.c:641 [<000000000c2e6d2f>] handle_lmk_event+0x169/0x920 drivers/staging/android/lowmemorykiller.c:116 [<00000000c7ec7ddc>] lowmem_scan+0x6f3/0xb70 drivers/staging/android/lowmemorykiller.c:354 [<00000000a88faa8a>] do_shrink_slab mm/vmscan.c:399 [inline] [<00000000a88faa8a>] shrink_slab.part.0+0x3cf/0xa20 mm/vmscan.c:502 [<0000000061b77975>] shrink_slab mm/vmscan.c:466 [inline] [<0000000061b77975>] shrink_node+0x1ed/0x750 mm/vmscan.c:2604 [<000000006fc211f9>] kswapd_shrink_node mm/vmscan.c:3209 [inline] [<000000006fc211f9>] balance_pgdat mm/vmscan.c:3329 [inline] [<000000006fc211f9>] kswapd+0x7f8/0x13b0 mm/vmscan.c:3523 [<000000003fbdbeb3>] kthread+0x278/0x310 kernel/kthread.c:211 [<0000000064e831be>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. audit_printk_skb: 30 callbacks suppressed audit: type=1400 audit(2000001451.380:2428): avc: denied { create } for pid=26398 comm="syz-executor.4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=0 audit: type=1400 audit(2000001451.420:2429): avc: denied { create } for pid=26398 comm="syz-executor.4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=0 audit: type=1400 audit(2000001451.470:2430): avc: denied { create } for pid=26398 comm="syz-executor.4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=0 audit: type=1400 audit(2000001451.500:2431): avc: denied { create } for pid=26398 comm="syz-executor.4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=0 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. audit: type=1400 audit(2000001455.720:2432): avc: denied { create } for pid=26573 comm="syz-executor.5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=0 EXT4-fs (sda1): Unrecognized mount option "fd=0xffffffffffffffff" or missing value selinux_nlmsg_perm: 19 callbacks suppressed SELinux: unrecognized netlink message: protocol=0 nlmsg_type=18465 sclass=netlink_route_socket pig=26606 comm=syz-executor.1 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=18465 sclass=netlink_route_socket pig=26611 comm=syz-executor.1 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=18465 sclass=netlink_route_socket pig=26611 comm=syz-executor.1 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=18465 sclass=netlink_route_socket pig=26606 comm=syz-executor.1 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=18465 sclass=netlink_route_socket pig=26606 comm=syz-executor.1 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=18465 sclass=netlink_route_socket pig=26606 comm=syz-executor.1 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'.