lowmemorykiller: Killing 'syz-executor.3' (7248) (tgid 7248), adj 1000, to free 52188kB on behalf of 'syz-executor.1' (2074) because cache 45548kB is below limit 65536kB for oom_score_adj 12 Free memory is -12860kB above reserved ================================= [ INFO: inconsistent lock state ] 4.9.141+ #23 Not tainted --------------------------------- inconsistent {RECLAIM_FS-ON-W} -> {IN-RECLAIM_FS-W} usage. kswapd0/33 [HC0[0]:SC0[0]:HE1:SE1] takes: (&sb->s_type->i_mutex_key#10){+.+.?.}, at: [] inode_lock include/linux/fs.h:766 [inline] (&sb->s_type->i_mutex_key#10){+.+.?.}, at: [] shmem_fallocate+0x13c/0xb10 mm/shmem.c:2676 mark_held_locks+0xc7/0x130 kernel/locking/lockdep.c:2660 __lockdep_trace_alloc kernel/locking/lockdep.c:2882 [inline] lockdep_trace_alloc+0x18e/0x2a0 kernel/locking/lockdep.c:2897 __alloc_pages_nodemask+0x14a/0x1bd0 mm/page_alloc.c:3804 __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] shmem_alloc_page mm/shmem.c:1420 [inline] shmem_alloc_and_acct_page mm/shmem.c:1450 [inline] shmem_getpage_gfp+0xc7c/0x18f0 mm/shmem.c:1724 shmem_getpage mm/shmem.c:123 [inline] shmem_write_begin+0xf4/0x1a0 mm/shmem.c:2205 generic_perform_write+0x28a/0x500 mm/filemap.c:2753 __generic_file_write_iter+0x352/0x540 mm/filemap.c:2878 generic_file_write_iter+0x37a/0x620 mm/filemap.c:2906 new_sync_write fs/read_write.c:496 [inline] __vfs_write+0x3d7/0x580 fs/read_write.c:509 vfs_write+0x187/0x520 fs/read_write.c:557 SYSC_write fs/read_write.c:604 [inline] SyS_write+0xd9/0x1c0 fs/read_write.c:596 do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285 entry_SYSCALL_64_after_swapgs+0x5d/0xdb irq event stamp: 571415 hardirqs last enabled at (571415): [] __mutex_trylock_slowpath kernel/locking/mutex.c:885 [inline] hardirqs last enabled at (571415): [] mutex_trylock+0x258/0x3e0 kernel/locking/mutex.c:908 hardirqs last disabled at (571414): [] __mutex_trylock_slowpath kernel/locking/mutex.c:873 [inline] hardirqs last disabled at (571414): [] mutex_trylock+0xaf/0x3e0 kernel/locking/mutex.c:908 softirqs last enabled at (571274): [] __do_softirq+0x46d/0x964 kernel/softirq.c:314 softirqs last disabled at (571251): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (571251): [] irq_exit+0x11c/0x150 kernel/softirq.c:409 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&sb->s_type->i_mutex_key#10); lock(&sb->s_type->i_mutex_key#10); *** DEADLOCK *** 2 locks held by kswapd0/33: #0: (shrinker_rwsem){++++..}, at: [] shrink_slab.part.8+0xb2/0xa00 mm/vmscan.c:471 #1: (ashmem_mutex){+.+.+.}, at: [] ashmem_shrink_scan+0x55/0x4c0 drivers/staging/android/ashmem.c:455 stack backtrace: CPU: 0 PID: 33 Comm: kswapd0 Not tainted 4.9.141+ #23 ffff8801d841f380 ffffffff81b42e79 ffff8801d8410000 ffffffff83cac960 ffff8801d8410900 ffff8801d8410920 ffffffff84244d40 ffff8801d841f3f8 ffffffff81400780 0000000000000000 ffffffff00000001 0000000000000001 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] print_usage_bug.cold.40+0x44e/0x57e kernel/locking/lockdep.c:2387 [] valid_state kernel/locking/lockdep.c:2400 [inline] [] mark_lock_irq kernel/locking/lockdep.c:2602 [inline] [] mark_lock+0x2f2/0x1290 kernel/locking/lockdep.c:3065 [] mark_irqflags kernel/locking/lockdep.c:2958 [inline] [] __lock_acquire+0x632/0x4a10 kernel/locking/lockdep.c:3302 [] lock_acquire+0x130/0x3e0 kernel/locking/lockdep.c:3756 [] down_write+0x41/0xa0 kernel/locking/rwsem.c:52 [] inode_lock include/linux/fs.h:766 [inline] [] shmem_fallocate+0x13c/0xb10 mm/shmem.c:2676 [] ashmem_shrink_scan+0x1b9/0x4c0 drivers/staging/android/ashmem.c:462 [] do_shrink_slab mm/vmscan.c:398 [inline] [] shrink_slab.part.8+0x3c6/0xa00 mm/vmscan.c:501 [] shrink_slab mm/vmscan.c:465 [inline] [] shrink_node+0x1ed/0x740 mm/vmscan.c:2602 [] kswapd_shrink_node mm/vmscan.c:3202 [inline] [] balance_pgdat mm/vmscan.c:3319 [inline] [] kswapd+0x7e9/0x13b0 mm/vmscan.c:3512 [] kthread+0x26d/0x300 kernel/kthread.c:211 [] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373 lowmemorykiller: Killing 'syz-executor.2' (9004) (tgid 9004), adj 1000, to free 52188kB on behalf of 'kswapd0' (33) because cache 45048kB is below limit 65536kB for oom_score_adj 12 Free memory is -9108kB above reserved lowmemorykiller: Killing 'syz-executor.2' (6963) (tgid 6963), adj 1000, to free 52184kB on behalf of 'kswapd0' (33) because cache 42848kB is below limit 65536kB for oom_score_adj 12 Free memory is -13076kB above reserved lowmemorykiller: Killing 'syz-executor.0' (9602) (tgid 9602), adj 1000, to free 52188kB on behalf of 'syz-executor.0' (20113) because cache 42848kB is below limit 65536kB for oom_score_adj 12 Free memory is -13076kB above reserved lowmemorykiller: Killing 'syz-executor.2' (7471) (tgid 7471), adj 1000, to free 52184kB on behalf of 'kswapd0' (33) because cache 42748kB is below limit 65536kB for oom_score_adj 12 Free memory is -9224kB above reserved lowmemorykiller: Killing 'syz-executor.2' (7494) (tgid 7494), adj 1000, to free 52184kB on behalf of 'kswapd0' (33) because cache 41648kB is below limit 65536kB for oom_score_adj 12 Free memory is -7924kB above reserved lowmemorykiller: Killing 'syz-executor.3' (20483) (tgid 20483), adj 1000, to free 52184kB on behalf of 'kswapd0' (33) because cache 40348kB is below limit 65536kB for oom_score_adj 12 Free memory is -13164kB above reserved lowmemorykiller: Killing 'syz-executor.3' (20494) (tgid 20494), adj 1000, to free 52188kB on behalf of 'kswapd0' (33) because cache 40048kB is below limit 65536kB for oom_score_adj 12 Free memory is -12764kB above reserved lowmemorykiller: Killing 'syz-executor.4' (31341) (tgid 31341), adj 1000, to free 52184kB on behalf of 'syz-executor.0' (20113) because cache 39348kB is below limit 65536kB for oom_score_adj 12 Free memory is -12780kB above reserved lowmemorykiller: Killing 'syz-executor.4' (32541) (tgid 32541), adj 1000, to free 52184kB on behalf of 'syz-executor.0' (20113) because cache 39248kB is below limit 65536kB for oom_score_adj 12 Free memory is -12780kB above reserved lowmemorykiller: Killing 'syz-executor.2' (2538) (tgid 2538), adj 1000, to free 52184kB on behalf of 'syz-executor.0' (20113) because cache 39248kB is below limit 65536kB for oom_score_adj 12 Free memory is 17620kB above reserved lowmemorykiller: Killing 'syz-executor.5' (4653) (tgid 4653), adj 1000, to free 52184kB on behalf of 'syz-executor.0' (20113) because cache 39248kB is below limit 65536kB for oom_score_adj 12 Free memory is 17508kB above reserved lowmemorykiller: Killing 'syz-executor.3' (4722) (tgid 4722), adj 1000, to free 52180kB on behalf of 'kswapd0' (33) because cache 38848kB is below limit 65536kB for oom_score_adj 12 Free memory is 1328kB above reserved lowmemorykiller: Killing 'syz-executor.5' (16795) (tgid 16795), adj 1000, to free 52180kB on behalf of 'kswapd0' (33) because cache 38848kB is below limit 65536kB for oom_score_adj 12 Free memory is 2028kB above reserved lowmemorykiller: Killing 'syz-executor.4' (17789) (tgid 17789), adj 1000, to free 52180kB on behalf of 'kswapd0' (33) because cache 38848kB is below limit 65536kB for oom_score_adj 12 Free memory is 31868kB above reserved lowmemorykiller: Killing 'syz-executor.5' (9744) (tgid 9744), adj 1000, to free 52176kB on behalf of 'kswapd0' (33) because cache 38848kB is below limit 65536kB for oom_score_adj 12 Free memory is 21568kB above reserved lowmemorykiller: Killing 'syz-executor.2' (19212) (tgid 19212), adj 1000, to free 52176kB on behalf of 'kswapd0' (33) because cache 38848kB is below limit 65536kB for oom_score_adj 12 Free memory is 21768kB above reserved lowmemorykiller: Killing 'syz-executor.2' (31722) (tgid 31722), adj 1000, to free 52176kB on behalf of 'kswapd0' (33) because cache 38848kB is below limit 65536kB for oom_score_adj 12 Free memory is 39964kB above reserved lowmemorykiller: Killing 'syz-executor.4' (31987) (tgid 31987), adj 1000, to free 52176kB on behalf of 'kswapd0' (33) because cache 38848kB is below limit 65536kB for oom_score_adj 12 Free memory is -5468kB above reserved