INFO: task hung in pipe

Kernel	Title	Repro	Cause bisect	Count	Last	Reported	Patched	Status
android-414	INFO: task hung in pipe_release			1	1740d	1740d	0/1	auto-closed as invalid on 2019/11/24 16:38
upstream	INFO: task hung in pipe_release (2) ext4	syz	done	3	1337d	1368d	15/26	fixed on 2020/09/25 01:17
upstream	INFO: task hung in pipe_release (4) fs	C	done	51	294d	295d	23/26	fixed on 2023/10/12 12:48
android-49	INFO: task hung in pipe_release			2	1933d	1844d	0/3	auto-closed as invalid on 2019/07/14 20:38
upstream	INFO: task hung in pipe_release (3) fs			4	898d	1012d	0/26	closed as invalid on 2022/02/07 19:19
upstream	INFO: task hung in pipe_release fs			2	1830d	1995d	0/26	auto-closed as invalid on 2019/10/25 10:11
linux-4.19	INFO: task hung in pipe_release			1	1133d	1133d	0/1	auto-closed as invalid on 2021/07/23 11:59

INFO: task syz-executor.0:3241 blocked for more than 140 seconds. Not tainted 4.9.190+ #2 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27240 3241 2108 0x00000004 0000000000000083 ffff8801c5d70000 ffff8801d1129b80 ffff8801db721000 ffff8801d1885f00 ffff8801db721018 ffff8801ae4cfc78 ffffffff8281a10e 0000000000000000 0000000000000000 00ffffff83c7c1d0 ffff8801db7218f0 Call Trace: [<0000000028259ce2>] schedule+0x92/0x1c0 kernel/sched/core.c:3546 [<0000000010744790>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3579 [<000000003ef5c2ee>] __mutex_lock_common kernel/locking/mutex.c:582 [inline] [<000000003ef5c2ee>] mutex_lock_nested+0x38d/0x920 kernel/locking/mutex.c:621 [<00000000ab86aecf>] __pipe_lock fs/pipe.c:87 [inline] [<00000000ab86aecf>] pipe_release+0x4e/0x250 fs/pipe.c:582 [<00000000f4b311ed>] __fput+0x274/0x720 fs/file_table.c:208 [<00000000dc0460d1>] ____fput+0x16/0x20 fs/file_table.c:244 [<00000000e0700a71>] task_work_run+0x108/0x180 kernel/task_work.c:116 [<000000003db28b4c>] tracehook_notify_resume include/linux/tracehook.h:191 [inline] [<000000003db28b4c>] exit_to_usermode_loop+0x13b/0x160 arch/x86/entry/common.c:163 [<0000000058992ba8>] prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline] [<0000000058992ba8>] syscall_return_slowpath arch/x86/entry/common.c:266 [inline] [<0000000058992ba8>] do_syscall_64+0x3ab/0x5c0 arch/x86/entry/common.c:293 [<0000000028008a47>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Showing all locks held in the system: 2 locks held by khungtaskd/24: #0: (rcu_read_lock){......}, at: [<000000008c505f2f>] check_hung_uninterruptible_tasks kernel/hung_task.c:169 [inline] #0: (rcu_read_lock){......}, at: [<000000008c505f2f>] watchdog+0x14b/0xaf0 kernel/hung_task.c:263 #1: (tasklist_lock){.+.+..}, at: [<00000000b18a4b6f>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4336 2 locks held by getty/2033: #0: (&tty->ldisc_sem){++++++}, at: [<00000000fcd0e827>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+...}, at: [<00000000caf66cd9>] n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.0/3241: #0: (&pipe->mutex/1){+.+.+.}, at: [<00000000ab86aecf>] __pipe_lock fs/pipe.c:87 [inline] #0: (&pipe->mutex/1){+.+.+.}, at: [<00000000ab86aecf>] pipe_release+0x4e/0x250 fs/pipe.c:582 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 24 Comm: khungtaskd Not tainted 4.9.190+ #2 ffff8801d98d7cc8 ffffffff81b66c51 0000000000000000 0000000000000000 0000000000000000 ffffffff81099a01 dffffc0000000000 ffff8801d98d7d00 ffffffff81b71eec 0000000000000000 0000000000000000 0000000000000000 Call Trace: [<00000000417ca2cc>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000417ca2cc>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<000000004d992e9c>] nmi_cpu_backtrace.cold+0x47/0x87 lib/nmi_backtrace.c:99 [<0000000036672b3a>] nmi_trigger_cpumask_backtrace+0x124/0x155 lib/nmi_backtrace.c:60 [<000000007381f56e>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37 [<00000000676f002f>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline] [<00000000676f002f>] check_hung_task kernel/hung_task.c:126 [inline] [<00000000676f002f>] check_hung_uninterruptible_tasks kernel/hung_task.c:183 [inline] [<00000000676f002f>] watchdog+0x670/0xaf0 kernel/hung_task.c:263 [<00000000076e094a>] kthread+0x278/0x310 kernel/kthread.c:211 [<00000000754a5852>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 3260 Comm: syz-executor.0 Not tainted 4.9.190+ #2 task: 000000004214e1c9 task.stack: 00000000c6912081 RIP: 0010:[<ffffffff811748e1>] c [<00000000be6bb4dd>] constant_test_bit arch/x86/include/asm/bitops.h:311 [inline] RIP: 0010:[<ffffffff811748e1>] c [<00000000be6bb4dd>] test_ti_thread_flag include/linux/thread_info.h:58 [inline] RIP: 0010:[<ffffffff811748e1>] c [<00000000be6bb4dd>] test_tsk_thread_flag include/linux/sched.h:3396 [inline] RIP: 0010:[<ffffffff811748e1>] c [<00000000be6bb4dd>] test_tsk_need_resched include/linux/sched.h:3411 [inline] RIP: 0010:[<ffffffff811748e1>] c [<00000000be6bb4dd>] check_preempt_curr+0x131/0x3b0 kernel/sched/core.c:976 RSP: 0018:ffff8801db707c50 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffff8801db721000 RCX: ffff8801db721000 RDX: 0000000000000000 RSI: ffffffff81bcd2ac RDI: ffff8801a9d5981c RBP: ffff8801db707c98 R08: ffff8801db7218f0 R09: 0000000000000003 R10: ffff8801cf668270 R11: 00000042adfd121a R12: ffffffff82a4ca80 R13: ffffffff82a4ca80 R14: 0000000000000000 R15: ffff8801a9d597c0 FS: 00007f4c2ff4e700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000201c1000 CR3: 00000001c73f3000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffff8801cf668288c ffff8801db721170c ffff8801db7218f0c ffff8801db721000c ffff8801db721000c ffff8801cf668000c ffff8801db707d80c 0000000000000000c ffff8801cf6687f8c ffff8801db707cd8c ffffffff81174b7fc ffffffff8117409ac Call Trace: <IRQ> d [<000000002376f83a>] ttwu_do_wakeup.isra.0+0x1f/0x580 kernel/sched/core.c:1707 [<0000000085645ac8>] ttwu_do_activate+0x154/0x200 kernel/sched/core.c:1753 [<00000000f676b07c>] ttwu_queue kernel/sched/core.c:1908 [inline] [<00000000f676b07c>] try_to_wake_up+0x5a3/0x1030 kernel/sched/core.c:2122 [<0000000099c2eec4>] wake_up_process+0x10/0x20 kernel/sched/core.c:2197 [<000000004a793869>] hrtimer_wakeup+0x48/0x60 kernel/time/hrtimer.c:1476 [<00000000bb1d690f>] __run_hrtimer kernel/time/hrtimer.c:1255 [inline] [<00000000bb1d690f>] __hrtimer_run_queues+0x313/0xe00 kernel/time/hrtimer.c:1319 [<00000000fbb5c62a>] hrtimer_interrupt+0x1b6/0x450 kernel/time/hrtimer.c:1353 [<00000000028425ba>] local_apic_timer_interrupt+0x76/0xa0 arch/x86/kernel/apic/apic.c:937 [<00000000ff1e574e>] smp_apic_timer_interrupt+0x79/0xb0 arch/x86/kernel/apic/apic.c:961 [<000000003a8e397b>] apic_timer_interrupt+0xa5/0xb0 arch/x86/entry/entry_64.S:653 <EOI> d [<00000000cb094bbe>] ? arch_local_irq_restore arch/x86/include/asm/paravirt.h:768 [inline] <EOI> d [<00000000cb094bbe>] ? lock_acquire+0x176/0x3d0 kernel/locking/lockdep.c:3759 [<00000000448bb6ae>] down_read+0x44/0xb0 kernel/locking/rwsem.c:22 [<000000007f5cbf92>] ext4_page_mkwrite+0x1a5/0x1040 fs/ext4/inode.c:5768 [<00000000ecd89c9f>] do_page_mkwrite+0x1d1/0x400 mm/memory.c:2061 [<00000000efe1e017>] wp_page_shared mm/memory.c:2326 [inline] [<00000000efe1e017>] do_wp_page+0xab8/0x20a0 mm/memory.c:2430 [<00000000f53a0c0e>] handle_pte_fault mm/memory.c:3562 [inline] [<00000000f53a0c0e>] __handle_mm_fault mm/memory.c:3634 [inline] [<00000000f53a0c0e>] handle_mm_fault+0xeff/0x2420 mm/memory.c:3671 [<000000000dd18bd1>] __do_page_fault+0x3f0/0xa60 arch/x86/mm/fault.c:1401 [<000000002208325f>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1464 [<000000007765be44>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:956 [<000000007b24413d>] pipe_to_user+0xb0/0x160 fs/splice.c:1256 [<00000000efac710f>] splice_from_pipe_feed fs/splice.c:521 [inline] [<00000000efac710f>] __splice_from_pipe+0x351/0x790 fs/splice.c:645 [<00000000c1819c92>] vmsplice_to_user+0x1bd/0x1e0 fs/splice.c:1291 [<000000008ea6c812>] SYSC_vmsplice fs/splice.c:1370 [inline] [<000000008ea6c812>] SyS_vmsplice+0x114/0x140 fs/splice.c:1353 [<000000005d5048d5>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<0000000028008a47>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Code: cd0 c7c c08 c84 cd2 c0f c85 c4a c01 c00 c00 c41 c83 c7f c5c c01 c74 c0f c48 c83 cc4 c20 c5b c41 c5c c41 c5d c41 c5e c41 c5f c5d cc3 c48 cb8 c00 c00 c00 c00 c00 cfc cff cdf c<4c> c89 cfa c48 cc1 cea c03 c80 c3c c02 c00 c0f c85 c41 c02 c00 c00 c49 c8b c07 ca8 c