loop2: p251 start 1854537728 is beyond EOD, truncated loop2: p252 start 1854537728 is beyond EOD, truncated loop2: p253 start 1854537728 is beyond EOD, truncated loop2: p254 start 1854537728 is beyond EOD, truncated loop2: p255 start 1854537728 is beyond EOD, truncated INFO: task init:12516 blocked for more than 140 seconds. Not tainted 4.9.205-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. init D29304 12516 1 0x00000000 0000000000000087 ffff8801c7afaf80 ffff88019dae1080 ffff8801db71ffc0 ffff8801c88caf80 ffff8801db71ffd8 ffff8801a984f758 ffffffff8280a6ae 0000000000000000 0000000000000000 00ff8801c7afb828 ffff8801db7208b0 Call Trace: [<000000007f43f026>] schedule+0x92/0x1c0 kernel/sched/core.c:3546 [<000000000d75ff68>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3579 [<00000000ae298958>] __mutex_lock_common kernel/locking/mutex.c:582 [inline] [<00000000ae298958>] mutex_lock_nested+0x38d/0x920 kernel/locking/mutex.c:621 [<0000000025b6cfe0>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] [<0000000025b6cfe0>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 [<00000000bcd748c8>] chrdev_open+0x230/0x630 fs/char_dev.c:398 [<00000000d59ce8d0>] do_dentry_open+0x422/0xd20 fs/open.c:791 [<00000000a27ec089>] vfs_open+0x105/0x230 fs/open.c:904 [<00000000e4b9e1de>] do_last fs/namei.c:3457 [inline] [<00000000e4b9e1de>] path_openat+0xbf5/0x2f60 fs/namei.c:3581 [<0000000074c3cb4d>] do_filp_open+0x1a1/0x280 fs/namei.c:3615 [<0000000085dc4d27>] do_sys_open+0x2f0/0x610 fs/open.c:1097 [<00000000111d1027>] SYSC_open fs/open.c:1115 [inline] [<00000000111d1027>] SyS_open+0x2d/0x40 fs/open.c:1110 [<000000005cb872ad>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<00000000273062fa>] 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: [<000000009d0e78b6>] check_hung_uninterruptible_tasks kernel/hung_task.c:169 [inline] #0: (rcu_read_lock){......}, at: [<000000009d0e78b6>] watchdog+0x14b/0xaf0 kernel/hung_task.c:263 #1: (tasklist_lock){.+.+..}, at: [<00000000fef4bd82>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4339 1 lock held by rsyslogd/1903: #0: (&f->f_pos_lock){+.+.+.}, at: [<0000000058be9054>] __fdget_pos+0xa8/0xd0 fs/file.c:782 2 locks held by getty/2030: #0: (&tty->ldisc_sem){++++++}, at: [<00000000d1872633>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+...}, at: [<00000000c148da20>] n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156 1 lock held by init/12516: #0: (tty_mutex){+.+.+.}, at: [<0000000025b6cfe0>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<0000000025b6cfe0>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/12517: #0: (tty_mutex){+.+.+.}, at: [<0000000025b6cfe0>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<0000000025b6cfe0>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/12518: #0: (tty_mutex){+.+.+.}, at: [<0000000025b6cfe0>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<0000000025b6cfe0>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/12519: #0: (tty_mutex){+.+.+.}, at: [<0000000025b6cfe0>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<0000000025b6cfe0>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 1 lock held by init/12520: #0: (tty_mutex){+.+.+.}, at: [<0000000025b6cfe0>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline] #0: (tty_mutex){+.+.+.}, at: [<0000000025b6cfe0>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.205-syzkaller #0 ffff8801d98d7cc8 ffffffff81b55e6b 0000000000000001 0000000000000000 0000000000000001 ffffffff8109a001 dffffc0000000000 ffff8801d98d7d00 ffffffff81b6110c 0000000000000001 0000000000000000 0000000000000001 Call Trace: [<00000000802b811c>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000802b811c>] dump_stack+0xcb/0x130 lib/dump_stack.c:56 [<0000000085176649>] nmi_cpu_backtrace.cold+0x47/0x87 lib/nmi_backtrace.c:99 [<000000005194294e>] nmi_trigger_cpumask_backtrace+0x124/0x155 lib/nmi_backtrace.c:60 [<000000000a8d7c63>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37 [<000000009b1ac67e>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline] [<000000009b1ac67e>] check_hung_task kernel/hung_task.c:126 [inline] [<000000009b1ac67e>] check_hung_uninterruptible_tasks kernel/hung_task.c:183 [inline] [<000000009b1ac67e>] watchdog+0x670/0xaf0 kernel/hung_task.c:263 [<00000000fd1e3a06>] kthread+0x278/0x310 kernel/kthread.c:211 [<00000000bf29ddc0>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 17503 Comm: blkid Not tainted 4.9.205-syzkaller #0 task: 000000009a173d53 task.stack: 0000000065154532 RIP: 0010:[] c [<0000000012ac9a29>] __lock_acquire+0x436/0x4390 kernel/locking/lockdep.c:3300 RSP: 0018:ffff8801a3ad7a80 EFLAGS: 00000002 RAX: 0000000000000007 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 000000000000023e RDI: ffff8801da6f503c RBP: ffff8801a3ad7c08 R08: 0000000000000001 R09: 0000000000000000 R10: ffff8801da6f5018 R11: 1ffff1003b4dea02 R12: 0000000000000000 R13: 000000000000023e R14: 0000000000000001 R15: ffff8801da6f4740 FS: 00007f55afcce740(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f55356c5000 CR3: 00000001d2500000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Stack: ffff8801a3ad7ac0c 0000000000000246c ffff8801da6f4740c 0000000000000000c 0000000000000000c 0000000000000002c 0000000000000001c 0000000000000241c 0000000000000001c ffffffff83caf900c ffff8801a3ad7c70c ffffffff83caf3f0c Call Trace: [<0000000025fe9c60>] lock_acquire+0x133/0x3d0 kernel/locking/lockdep.c:3759 [<00000000a9c29800>] __raw_spin_lock include/linux/spinlock_api_smp.h:144 [inline] [<00000000a9c29800>] _raw_spin_lock+0x38/0x50 kernel/locking/spinlock.c:151 [<00000000a2742b41>] spin_lock include/linux/spinlock.h:302 [inline] [<00000000a2742b41>] browse_rb mm/mmap.c:313 [inline] [<00000000a2742b41>] validate_mm+0x2fe/0x5a0 mm/mmap.c:380 [<000000004426e096>] __vma_adjust+0x939/0x1660 mm/mmap.c:962 [<000000000063414a>] vma_adjust include/linux/mm.h:1999 [inline] [<000000000063414a>] SYSC_mremap mm/mremap.c:556 [inline] [<000000000063414a>] SyS_mremap+0x4a0/0xd20 mm/mremap.c:488 [<000000005cb872ad>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<00000000273062fa>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Code: c14 c09 cc8 c09 cd0 c48 c89 cfa c41 c89 c42 c20 c48 cc1 cea c03 c48 cb8 c00 c00 c00 c00 c00 cfc cff cdf c0f cb6 c14 c02 c48 c89 cf8 c83 ce0 c07 c83 cc0 c03 c38 cd0 c7c c08 c<84> cd2 c0f c85 c76 c0e c00 c00 c8b c45 c28 c45 c85 cc0 c41 c89 c42 c24 c0f c84 c7d c