Free memory is -12752kB above reserved lowmemorykiller: Killing 'syz-executor.2' (7545) (tgid 7545), adj 1000, to free 35968kB on behalf of 'kswapd0' (33) because cache 47088kB is below limit 65536kB for oom_score_adj 12 Free memory is -12552kB above reserved BUG: sleeping function called from invalid context at kernel/fork.c:905 in_atomic(): 0, irqs_disabled(): 0, pid: 33, name: kswapd0 2 locks held by kswapd0/33: #0: (shrinker_rwsem){++++..}, at: [<00000000745d12cc>] shrink_slab.part.0+0xb2/0xa20 mm/vmscan.c:472 #1: (rcu_read_lock){......}, at: [<0000000057c08438>] lowmem_scan+0x242/0xb50 drivers/staging/android/lowmemorykiller.c:272 Preemption disabled at: [<00000000372cf8b1>] spin_lock include/linux/spinlock.h:302 [inline] [<00000000372cf8b1>] task_lock include/linux/sched.h:3217 [inline] [<00000000372cf8b1>] get_task_mm+0x20/0xc0 kernel/fork.c:1012 CPU: 1 PID: 33 Comm: kswapd0 Not tainted 4.9.189+ #22 ffff8801d8def7c0 ffffffff81b65c01 0000000000000000 0000000000000001 ffff8801d992c740 ffffffff810d1010 ffff8801d992c740 ffff8801d8def7f8 ffffffff814018f3 ffff8801d992c740 ffffffff82a39fc0 0000000000000389 Call Trace: [<00000000855c9ac6>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000855c9ac6>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<0000000034fb92dd>] ___might_sleep.cold+0x1c1/0x1fa kernel/sched/core.c:8004 [<000000003a36c732>] __might_sleep+0x95/0x1a0 kernel/sched/core.c:7961 [<0000000056f4c8ee>] mmput+0x28/0x370 kernel/fork.c:905 [<0000000064675a32>] handle_lmk_event+0xea/0x8a0 drivers/staging/android/lowmemorykiller.c:111 [<000000004df4346e>] lowmem_scan+0x695/0xb50 drivers/staging/android/lowmemorykiller.c:345 [<00000000ce1fbb50>] do_shrink_slab mm/vmscan.c:399 [inline] [<00000000ce1fbb50>] shrink_slab.part.0+0x3cf/0xa20 mm/vmscan.c:502 [<0000000028792eec>] shrink_slab mm/vmscan.c:466 [inline] [<0000000028792eec>] shrink_node+0x1ed/0x750 mm/vmscan.c:2604 [<00000000e450c83e>] kswapd_shrink_node mm/vmscan.c:3209 [inline] [<00000000e450c83e>] balance_pgdat mm/vmscan.c:3329 [inline] [<00000000e450c83e>] kswapd+0x7f8/0x13b0 mm/vmscan.c:3523 [<00000000aedcd177>] kthread+0x278/0x310 kernel/kthread.c:211 [<00000000095f8a0c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 ================================= [ INFO: inconsistent lock state ] 4.9.189+ #22 Tainted: G W --------------------------------- inconsistent {RECLAIM_FS-ON-W} -> {IN-RECLAIM_FS-R} usage. kswapd0/33 [HC0[0]:SC0[0]:HE1:SE1] takes: (&mm->mmap_sem){+++++?}, at: [<000000008b291c0b>] 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: 186297 hardirqs last enabled at (186297): [<000000005978f362>] dump_stack+0x100/0x120 lib/dump_stack.c:56 hardirqs last disabled at (186296): [<00000000312d32dd>] dump_stack+0x2c/0x120 lib/dump_stack.c:38 softirqs last enabled at (186190): [<00000000ac946c69>] __do_softirq+0x474/0x964 kernel/softirq.c:314 softirqs last disabled at (186171): [<00000000c4611fc9>] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (186171): [<00000000c4611fc9>] 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 kswapd0/33: #0: (shrinker_rwsem){++++..}, at: [<00000000745d12cc>] shrink_slab.part.0+0xb2/0xa20 mm/vmscan.c:472 #1: (rcu_read_lock){......}, at: [<0000000057c08438>] lowmem_scan+0x242/0xb50 drivers/staging/android/lowmemorykiller.c:272 #2: (lmk_event_lock){+.+.-.}, at: [<00000000e8f5b564>] spin_lock include/linux/spinlock.h:302 [inline] #2: (lmk_event_lock){+.+.-.}, at: [<00000000e8f5b564>] handle_lmk_event+0xfb/0x8a0 drivers/staging/android/lowmemorykiller.c:114 stack backtrace: CPU: 1 PID: 33 Comm: kswapd0 Tainted: G W 4.9.189+ #22 ffff8801d8def500 ffffffff81b65c01 00000000000000f0 ffff8801d992c740 ffffffff83caf950 ffff8801d992d088 ffffffff84250fc0 ffff8801d8def578 ffffffff81408330 0000000000000000 ffffffff00000001 0000000000000001 Call Trace: [<00000000855c9ac6>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000855c9ac6>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<00000000d90f1a1c>] print_usage_bug kernel/locking/lockdep.c:2387 [inline] [<00000000d90f1a1c>] print_usage_bug.cold+0x452/0x5a2 kernel/locking/lockdep.c:2354 [<000000000f67d72e>] valid_state kernel/locking/lockdep.c:2400 [inline] [<000000000f67d72e>] mark_lock_irq kernel/locking/lockdep.c:2602 [inline] [<000000000f67d72e>] mark_lock+0x6c7/0x12e0 kernel/locking/lockdep.c:3065 [<0000000064382837>] mark_irqflags kernel/locking/lockdep.c:2958 [inline] [<0000000064382837>] __lock_acquire+0x5be/0x4390 kernel/locking/lockdep.c:3302 [<000000000628ac3d>] lock_acquire+0x133/0x3d0 kernel/locking/lockdep.c:3756 [<000000002ddf7120>] down_read+0x44/0xb0 kernel/locking/rwsem.c:22 [<000000008b291c0b>] get_cmdline+0xa3/0x2d0 mm/util.c:641 [<000000009d1aa225>] handle_lmk_event+0x13c/0x8a0 drivers/staging/android/lowmemorykiller.c:128 [<000000004df4346e>] lowmem_scan+0x695/0xb50 drivers/staging/android/lowmemorykiller.c:345 [<00000000ce1fbb50>] do_shrink_slab mm/vmscan.c:399 [inline] [<00000000ce1fbb50>] shrink_slab.part.0+0x3cf/0xa20 mm/vmscan.c:502 [<0000000028792eec>] shrink_slab mm/vmscan.c:466 [inline] [<0000000028792eec>] shrink_node+0x1ed/0x750 mm/vmscan.c:2604 [<00000000e450c83e>] kswapd_shrink_node mm/vmscan.c:3209 [inline] [<00000000e450c83e>] balance_pgdat mm/vmscan.c:3329 [inline] [<00000000e450c83e>] kswapd+0x7f8/0x13b0 mm/vmscan.c:3523 [<00000000aedcd177>] kthread+0x278/0x310 kernel/kthread.c:211 [<00000000095f8a0c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 lowmemorykiller: Killing 'syz-executor.2' (7067) (tgid 7067), adj 1000, to free 35960kB on behalf of 'kswapd0' (33) because cache 35536kB is below limit 65536kB for oom_score_adj 12 Free memory is -840kB above reserved lowmemorykiller: Killing 'syz-executor.2' (20785) (tgid 20785), adj 1000, to free 35960kB on behalf of 'kswapd0' (33) because cache 35536kB is below limit 65536kB for oom_score_adj 12 Free memory is -840kB above reserved lowmemorykiller: Killing 'syz-executor.2' (21167) (tgid 21167), adj 1000, to free 35956kB on behalf of 'kswapd0' (33) because cache 35536kB is below limit 65536kB for oom_score_adj 12 Free memory is -8kB above reserved lowmemorykiller: Killing 'syz-executor.2' (17582) (tgid 17582), adj 1000, to free 35952kB on behalf of 'kswapd0' (33) because cache 35536kB is below limit 65536kB for oom_score_adj 12 Free memory is 292kB above reserved lowmemorykiller: Killing 'syz-executor.2' (17628) (tgid 17628), adj 1000, to free 35952kB on behalf of 'kswapd0' (33) because cache 35536kB is below limit 65536kB for oom_score_adj 12 Free memory is 804kB above reserved lowmemorykiller: Killing 'syz-executor.2' (17713) (tgid 17713), adj 1000, to free 35952kB on behalf of 'kswapd0' (33) because cache 35308kB is below limit 65536kB for oom_score_adj 12 Free memory is -9984kB above reserved lowmemorykiller: Killing 'syz-executor.2' (20118) (tgid 20118), adj 1000, to free 35952kB on behalf of 'syz-executor.3' (1361) because cache 34108kB is below limit 65536kB for oom_score_adj 12 Free memory is -12964kB above reserved lowmemorykiller: Killing 'syz-executor.2' (20118) (tgid 20118), adj 1000, to free 35952kB on behalf of 'kswapd0' (33) because cache 34608kB is below limit 65536kB for oom_score_adj 12 Free memory is -13264kB above reserved lowmemorykiller: Killing 'syz-executor.2' (20165) (tgid 20165), adj 1000, to free 35952kB on behalf of 'kswapd0' (33) because cache 33508kB is below limit 65536kB for oom_score_adj 12 Free memory is -12664kB above reserved lowmemorykiller: Killing 'syz-executor.2' (20298) (tgid 20298), adj 1000, to free 35952kB on behalf of 'kswapd0' (33) because cache 33500kB is below limit 65536kB for oom_score_adj 12 Free memory is -12612kB 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: [<00000000372cf8b1>] spin_lock include/linux/spinlock.h:302 [inline] [<00000000372cf8b1>] task_lock include/linux/sched.h:3217 [inline] [<00000000372cf8b1>] get_task_mm+0x20/0xc0 kernel/fork.c:1012 CPU: 0 PID: 33 Comm: kswapd0 Tainted: G W 4.9.189+ #22 ffff8801d8def7c0 ffffffff81b65c01 0000000000000000 0000000000000001 ffff8801d992c740 ffffffff810d1010 ffff8801d992c740 ffff8801d8def7f8 ffffffff814018f3 ffff8801d992c740 ffffffff82a39fc0 0000000000000389 Call Trace: [<00000000855c9ac6>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000855c9ac6>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<0000000034fb92dd>] ___might_sleep.cold+0x1c1/0x1fa kernel/sched/core.c:8004 [<000000003a36c732>] __might_sleep+0x95/0x1a0 kernel/sched/core.c:7961 [<0000000056f4c8ee>] mmput+0x28/0x370 kernel/fork.c:905 [<0000000064675a32>] handle_lmk_event+0xea/0x8a0 drivers/staging/android/lowmemorykiller.c:111 [<000000004df4346e>] lowmem_scan+0x695/0xb50 drivers/staging/android/lowmemorykiller.c:345 [<00000000ce1fbb50>] do_shrink_slab mm/vmscan.c:399 [inline] [<00000000ce1fbb50>] shrink_slab.part.0+0x3cf/0xa20 mm/vmscan.c:502 [<0000000028792eec>] shrink_slab mm/vmscan.c:466 [inline] [<0000000028792eec>] shrink_node+0x1ed/0x750 mm/vmscan.c:2604 [<00000000e450c83e>] kswapd_shrink_node mm/vmscan.c:3209 [inline] [<00000000e450c83e>] balance_pgdat mm/vmscan.c:3329 [inline] [<00000000e450c83e>] kswapd+0x7f8/0x13b0 mm/vmscan.c:3523 [<00000000aedcd177>] kthread+0x278/0x310 kernel/kthread.c:211 [<00000000095f8a0c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 lowmemorykiller: Killing 'syz-executor.4' (3832) (tgid 3832), adj 1000, to free 35948kB on behalf of 'kswapd0' (33) because cache 32500kB is below limit 65536kB for oom_score_adj 12 Free memory is -2032kB above reserved lowmemorykiller: Killing 'syz-executor.2' (21117) (tgid 21117), adj 1000, to free 35888kB on behalf of 'kswapd0' (33) because cache 32500kB is below limit 65536kB for oom_score_adj 12 Free memory is -9656kB above reserved lowmemorykiller: Killing 'syz-executor.3' (12619) (tgid 12619), adj 1000, to free 35888kB on behalf of 'syz-executor.3' (1361) because cache 32300kB is below limit 65536kB for oom_score_adj 12 Free memory is -13412kB above reserved lowmemorykiller: Killing 'syz-executor.2' (17458) (tgid 17458), adj 1000, to free 35884kB on behalf of 'syz-executor.3' (1361) because cache 32000kB is below limit 65536kB for oom_score_adj 12 Free memory is -12508kB above reserved lowmemorykiller: Killing 'syz-executor.2' (17482) (tgid 17482), adj 1000, to free 35884kB on behalf of 'syz-executor.3' (1361) because cache 31600kB is below limit 65536kB for oom_score_adj 12 Free memory is -13052kB above reserved lowmemorykiller: Killing 'syz-executor.2' (17561) (tgid 17561), adj 1000, to free 35884kB on behalf of 'syz-executor.3' (1361) because cache 31400kB is below limit 65536kB for oom_score_adj 12 Free memory is -13312kB above reserved lowmemorykiller: Killing 'syz-executor.2' (19749) (tgid 19749), adj 1000, to free 35876kB on behalf of 'syz-executor.3' (1361) because cache 31200kB is below limit 65536kB for oom_score_adj 12 Free memory is -11408kB above reserved lowmemorykiller: Killing 'syz-executor.2' (19888) (tgid 19888), adj 1000, to free 35876kB on behalf of 'syz-executor.3' (1361) because cache 31100kB is below limit 65536kB for oom_score_adj 12 Free memory is -13236kB above reserved lowmemorykiller: Killing 'syz-executor.2' (19925) (tgid 19925), adj 1000, to free 35876kB on behalf of 'syz-executor.3' (1361) because cache 30800kB is below limit 65536kB for oom_score_adj 12 Free memory is -13036kB above reserved lowmemorykiller: Killing 'syz-executor.2' (19938) (tgid 19938), adj 1000, to free 35876kB on behalf of 'syz-executor.3' (1361) because cache 29500kB is below limit 65536kB for oom_score_adj 12 Free memory is -13136kB above reserved lowmemorykiller: Killing 'syz-executor.2' (20011) (tgid 20011), adj 1000, to free 35876kB on behalf of 'syz-executor.3' (1361) because cache 29200kB is below limit 65536kB for oom_score_adj 12 Free memory is -13428kB above reserved lowmemorykiller: Killing 'syz-executor.2' (20025) (tgid 20025), adj 1000, to free 35876kB on behalf of 'syz-executor.3' (1361) because cache 29000kB is below limit 65536kB for oom_score_adj 12 Free memory is -13320kB above reserved lowmemorykiller: Killing 'syz-executor.2' (20701) (tgid 20701), adj 1000, to free 35876kB on behalf of 'syz-executor.3' (1361) because cache 28500kB is below limit 65536kB for oom_score_adj 12 Free memory is -13220kB above reserved lowmemorykiller: Killing 'syz-executor.2' (20767) (tgid 20767), adj 1000, to free 35876kB on behalf of 'syz-executor.3' (1361) because cache 28200kB is below limit 65536kB for oom_score_adj 12 Free memory is -13012kB above reserved lowmemorykiller: Killing 'syz-executor.2' (20866) (tgid 20866), adj 1000, to free 35876kB on behalf of 'syz-executor.3' (1361) because cache 28000kB is below limit 65536kB for oom_score_adj 12 Free memory is -13204kB above reserved lowmemorykiller: Killing 'syz-executor.2' (21389) (tgid 21389), adj 1000, to free 35876kB on behalf of 'syz-executor.3' (1361) because cache 27800kB is below limit 65536kB for oom_score_adj 12 Free memory is -13372kB above reserved lowmemorykiller: Killing 'syz-executor.2' (21525) (tgid 21525), adj 1000, to free 35876kB on behalf of 'syz-executor.3' (1361) because cache 27600kB is below limit 65536kB for oom_score_adj 12 Free memory is -13372kB above reserved audit: type=1400 audit(2000000434.030:6809): avc: denied { create } for pid=1444 comm="syz-executor.2" 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(2000000434.090:6810): avc: denied { create } for pid=1456 comm="syz-executor.1" 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(2000000434.190:6811): avc: denied { create } for pid=1444 comm="syz-executor.2" 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(2000000434.810:6812): avc: denied { create } for pid=1456 comm="syz-executor.1" 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(2000000434.850:6813): avc: denied { create } for pid=1473 comm="syz-executor.2" 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(2000000435.080:6814): avc: denied { create } for pid=1500 comm="syz-executor.2" 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(2000000435.840:6815): avc: denied { create } for pid=1526 comm="syz-executor.2" 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(2000000436.090:6816): avc: denied { create } for pid=1538 comm="syz-executor.1" 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(2000000436.120:6817): avc: denied { create } for pid=1538 comm="syz-executor.1" 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(2000000436.170:6818): avc: denied { create } for pid=1538 comm="syz-executor.1" 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