binder: 12874:12946 transaction failed 29189/-3, size 24-8 line 3136 binder: send failed reply for transaction 32 to 12874:12877 binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 INFO: task syz-executor5:12865 blocked for more than 140 seconds. Not tainted 4.9.119-g9dc978d #23 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D28656 12865 9518 0x00000004 ffff88019a5a6000 ffff8801c89f7480 ffff8801c89f7480 ffff880199f1b000 ffff8801db321c18 ffff8801a5857808 ffffffff839ebdcd ffffffff81235627 0000000000000000 ffff88019a5a68c0 0000000600000007 ffff8801db3224e8 Call Trace: [] schedule+0x7f/0x1b0 kernel/sched/core.c:3553 [] __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:526 [inline] [] rwsem_down_write_failed+0x598/0x990 kernel/locking/rwsem-xadd.c:555 [] call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105 [] __down_write arch/x86/include/asm/rwsem.h:125 [inline] [] down_write+0x5c/0xa0 kernel/locking/rwsem.c:54 [] inode_lock include/linux/fs.h:766 [inline] [] do_last fs/namei.c:3312 [inline] [] path_openat+0xed5/0x3590 fs/namei.c:3534 [] do_filp_open+0x197/0x270 fs/namei.c:3568 [] do_sys_open+0x30d/0x5c0 fs/open.c:1072 [] SYSC_open fs/open.c:1090 [inline] [] SyS_open fs/open.c:1085 [inline] [] SYSC_creat fs/open.c:1110 [inline] [] SyS_creat+0x27/0x30 fs/open.c:1108 [] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Showing all locks held in the system: 2 locks held by khungtaskd/519: #0: (rcu_read_lock){......}, at: [] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline] #0: (rcu_read_lock){......}, at: [] watchdog+0x11c/0xa20 kernel/hung_task.c:239 #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336 2 locks held by getty/3646: #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367 #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142 2 locks held by syz-executor5/12854: #0: (sb_writers#21){.+.+.+}, at: [] sb_start_write include/linux/fs.h:1573 [inline] #0: (sb_writers#21){.+.+.+}, at: [] mnt_want_write+0x3f/0xb0 fs/namespace.c:391 #1: (&sb->s_type->i_mutex_key#26){+.+.+.}, at: [] inode_lock include/linux/fs.h:766 [inline] #1: (&sb->s_type->i_mutex_key#26){+.+.+.}, at: [] do_last fs/namei.c:3312 [inline] #1: (&sb->s_type->i_mutex_key#26){+.+.+.}, at: [] path_openat+0xed5/0x3590 fs/namei.c:3534 2 locks held by syz-executor5/12865: #0: (sb_writers#21){.+.+.+}, at: [] sb_start_write include/linux/fs.h:1573 [inline] #0: (sb_writers#21){.+.+.+}, at: [] mnt_want_write+0x3f/0xb0 fs/namespace.c:391 #1: (&sb->s_type->i_mutex_key#26){+.+.+.}, at: [] inode_lock include/linux/fs.h:766 [inline] #1: (&sb->s_type->i_mutex_key#26){+.+.+.}, at: [] do_last fs/namei.c:3312 [inline] #1: (&sb->s_type->i_mutex_key#26){+.+.+.}, at: [] path_openat+0xed5/0x3590 fs/namei.c:3534 1 lock held by syz-executor5/12918: #0: (&sb->s_type->i_mutex_key#26){+.+.+.}, at: [] inode_lock include/linux/fs.h:766 [inline] #0: (&sb->s_type->i_mutex_key#26){+.+.+.}, at: [] lock_mount+0x8c/0x2c0 fs/namespace.c:2077 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.119-g9dc978d #23 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801d8597d08 ffffffff81eb4be9 0000000000000000 0000000000000000 0000000000000000 0000000000000001 ffffffff810b9bd0 ffff8801d8597d40 ffffffff81ebfee7 0000000000000000 0000000000000000 0000000000000003 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] nmi_cpu_backtrace.cold.2+0x48/0x87 lib/nmi_backtrace.c:99 [] nmi_trigger_cpumask_backtrace+0x12a/0x14f lib/nmi_backtrace.c:60 [] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37 [] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline] [] check_hung_task kernel/hung_task.c:125 [inline] [] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline] [] watchdog+0x6b4/0xa20 kernel/hung_task.c:239 [] kthread+0x26d/0x300 kernel/kthread.c:211 [] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.119-g9dc978d #23 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801d9a6b000 task.stack: ffff8801d9a80000 RIP: 0010:[] c [] validate_chain kernel/locking/lockdep.c:2235 [inline] RIP: 0010:[] c [] __lock_acquire+0x85a/0x4070 kernel/locking/lockdep.c:3345 RSP: 0018:ffff8801db307d10 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffff8801d9a6b8c8 RCX: 00000000ffffffd3 RDX: 000000003ca8be5e RSI: ffff8801d9a6b8c8 RDI: 0000000000000000 RBP: ffff8801db307eb8 R08: ffff8801d9a6b8e8 R09: 0000000000000001 R10: ffff8801d9a6b000 R11: 0000000000000001 R12: 000000009899986f R13: 0000000000000000 R14: 00000000a41a989d R15: 1a707d6f3ca8be5e FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc0ad49388 CR3: 00000001c752b000 CR4: 00000000001606f0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Stack: ffffffff81236190c 0000000000000001c ffff8801db3185d8c 0000000000000000c 0000000000000020c ffff8801db307d78c ffffffff81f1c62bc ffff8801d9a6b8c0c ffff8801d9a6b8c8c 0000000000000246c ffffffff8558da40c ffffffff81207e02c Call Trace: [] lock_acquire+0x130/0x3e0 kernel/locking/lockdep.c:3756 [] seqcount_lockdep_reader_access include/linux/seqlock.h:80 [inline] [] read_seqcount_begin include/linux/seqlock.h:163 [inline] [] ktime_get+0x11a/0x1e0 kernel/time/timekeeping.c:757 [] tick_nohz_irq_enter kernel/time/tick-sched.c:1144 [inline] [] tick_irq_enter+0xcc/0x220 kernel/time/tick-sched.c:1165 [] irq_enter+0xb3/0xd0 kernel/softirq.c:345 [] smp_reschedule_interrupt+0xa/0x90 arch/x86/kernel/smp.c:267 [] reschedule_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:671 d [] ? native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:53 [] arch_safe_halt arch/x86/include/asm/paravirt.h:104 [inline] [] default_idle+0x55/0x360 arch/x86/kernel/process.c:437 [] arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:428 [] default_idle_call+0x45/0x60 kernel/sched/idle.c:97 [] cpuidle_idle_call kernel/sched/idle.c:155 [inline] [] cpu_idle_loop kernel/sched/idle.c:248 [inline] [] cpu_startup_entry+0x2b5/0x380 kernel/sched/idle.c:303 [] start_secondary+0x328/0x400 arch/x86/kernel/smpboot.c:257 Code: c89 c8c c24 c98 c00 c00 c00 ce8 c95 c97 cff cff c44 c8b c8c c24 c98 c00 c00 c00 c85 cc0 c4c c8b c54 c24 c60 c0f c84 cbf c0d c00 c00 c48 cb8 c00 c00 c00 c00 c00 cfc cff cdf c<48> c8b c54 c24 c78 c48 cc1 cea c03 c0f cb6 c04 c02 c84 cc0 c74 c08 c3c c03 c0f c8e c