input: syz1 as /devices/virtual/input/input82 ================================= [ INFO: inconsistent lock state ] 4.9.141+ #1 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: 283 hardirqs last enabled at (283): [] __mutex_trylock_slowpath kernel/locking/mutex.c:885 [inline] hardirqs last enabled at (283): [] mutex_trylock+0x258/0x3e0 kernel/locking/mutex.c:908 hardirqs last disabled at (282): [] __mutex_trylock_slowpath kernel/locking/mutex.c:873 [inline] hardirqs last disabled at (282): [] mutex_trylock+0xaf/0x3e0 kernel/locking/mutex.c:908 softirqs last enabled at (0): [] copy_process.part.8+0x10da/0x6a10 kernel/fork.c:1639 softirqs last disabled at (0): [< (null)>] (null) 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: 1 PID: 33 Comm: kswapd0 Not tainted 4.9.141+ #1 ffff8801d841f380 ffffffff81b42e79 ffff8801d8410000 ffffffff83cacb10 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 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=25697 sclass=netlink_route_socket pig=21977 comm=syz-executor.1 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=21977 comm=syz-executor.1 input: syz1 as /devices/virtual/input/input83 ip6_tunnel: ip6tnl2 xmit: Local address not yet configured! lowmemorykiller: Killing 'syz-executor.5' (15949) (tgid 15949), adj 1000, to free 52492kB on behalf of 'udevd' (2634) because cache 65504kB is below limit 65536kB for oom_score_adj 12 Free memory is -10444kB above reserved lowmemorykiller: Killing 'syz-executor.0' (10866) (tgid 10866), adj 1000, to free 52480kB on behalf of 'kswapd0' (33) because cache 46404kB is below limit 65536kB for oom_score_adj 12 Free memory is 24948kB above reserved lowmemorykiller: Killing 'syz-executor.1' (6568) (tgid 6568), adj 1000, to free 52468kB on behalf of 'kswapd0' (33) because cache 46404kB is below limit 65536kB for oom_score_adj 12 Free memory is 32564kB above reserved lowmemorykiller: Killing 'syz-executor.4' (2806) (tgid 2806), adj 1000, to free 52456kB on behalf of 'kswapd0' (33) because cache 46404kB is below limit 65536kB for oom_score_adj 12 Free memory is 44408kB above reserved lowmemorykiller: Killing 'syz-executor.1' (8700) (tgid 8700), adj 1000, to free 52456kB on behalf of 'kswapd0' (33) because cache 46404kB is below limit 65536kB for oom_score_adj 12 Free memory is 53208kB above reserved lowmemorykiller: Killing 'syz-executor.4' (8199) (tgid 8199), adj 1000, to free 52448kB on behalf of 'kswapd0' (33) because cache 46404kB is below limit 65536kB for oom_score_adj 12 Free memory is 54584kB above reserved lowmemorykiller: Killing 'syz-executor.5' (16776) (tgid 16776), adj 1000, to free 52448kB on behalf of 'kswapd0' (33) because cache 49828kB is below limit 65536kB for oom_score_adj 12 Free memory is -4804kB above reserved lowmemorykiller: Killing 'syz-executor.1' (8675) (tgid 8675), adj 1000, to free 52444kB on behalf of 'kswapd0' (33) because cache 43572kB is below limit 65536kB for oom_score_adj 12 Free memory is -6760kB above reserved lowmemorykiller: Killing 'syz-executor.4' (11374) (tgid 11374), adj 1000, to free 52444kB on behalf of 'kswapd0' (33) because cache 46644kB is below limit 65536kB for oom_score_adj 12 Free memory is -2728kB above reserved lowmemorykiller: Killing 'syz-executor.4' (11341) (tgid 11341), adj 1000, to free 52440kB on behalf of 'kswapd0' (33) because cache 46548kB is below limit 65536kB for oom_score_adj 12 Free memory is -356kB above reserved netlink: 260 bytes leftover after parsing attributes in process `syz-executor.5'. lowmemorykiller: Killing 'syz-executor.5' (11865) (tgid 11865), adj 1000, to free 52440kB on behalf of 'kswapd0' (33) because cache 49592kB is below limit 65536kB for oom_score_adj 12 Free memory is -5872kB above reserved lowmemorykiller: Killing 'syz-executor.1' (14048) (tgid 14048), adj 1000, to free 52440kB on behalf of 'kswapd0' (33) because cache 43284kB is below limit 65536kB for oom_score_adj 12 Free memory is -3444kB above reserved lowmemorykiller: Killing 'syz-executor.5' (17529) (tgid 17529), adj 1000, to free 52440kB on behalf of 'kswapd0' (33) because cache 43288kB is below limit 65536kB for oom_score_adj 12 Free memory is -3464kB above reserved lowmemorykiller: Killing 'syz-executor.5' (17835) (tgid 17835), adj 1000, to free 52440kB on behalf of 'syz-executor.0' (22460) because cache 43192kB is below limit 65536kB for oom_score_adj 12 Free memory is -5704kB above reserved lowmemorykiller: Killing 'syz-executor.2' (17065) (tgid 17065), adj 1000, to free 52436kB on behalf of 'syz-executor.0' (22460) because cache 43096kB is below limit 65536kB for oom_score_adj 12 Free memory is 3344kB above reserved lowmemorykiller: Killing 'syz-executor.0' (10947) (tgid 10947), adj 1000, to free 52432kB on behalf of 'syz-executor.0' (22460) because cache 43100kB is below limit 65536kB for oom_score_adj 12 Free memory is 19816kB above reserved lowmemorykiller: Killing 'syz-executor.0' (10973) (tgid 10973), adj 1000, to free 52432kB on behalf of 'kswapd0' (33) because cache 43028kB is below limit 65536kB for oom_score_adj 12 Free memory is -6552kB above reserved lowmemorykiller: Killing 'syz-executor.0' (10973) (tgid 10973), adj 1000, to free 52432kB on behalf of 'syz-executor.0' (22549) because cache 42928kB is below limit 65536kB for oom_score_adj 12 Free memory is -6552kB above reserved lowmemorykiller: Killing 'syz-executor.4' (19821) (tgid 19821), adj 1000, to free 52432kB on behalf of 'kswapd0' (33) because cache 42432kB is below limit 65536kB for oom_score_adj 12 Free memory is 156kB above reserved lowmemorykiller: Killing 'syz-executor.1' (14241) (tgid 14241), adj 1000, to free 52428kB on behalf of 'kswapd0' (33) because cache 42340kB is below limit 65536kB for oom_score_adj 12 Free memory is -6768kB above reserved