INFO: task syz-executor.5:12673 can't die for more than 143 seconds. task:syz-executor.5 state:D stack:29800 pid:12673 ppid: 6870 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3777 [inline] __schedule+0xea9/0x2230 kernel/sched/core.c:4526 schedule+0xd0/0x2a0 kernel/sched/core.c:4601 schedule_timeout+0x1d8/0x250 kernel/time/timer.c:1855 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x163/0x260 kernel/sched/completion.c:138 io_sq_thread_stop fs/io_uring.c:6906 [inline] io_finish_async fs/io_uring.c:6920 [inline] io_sq_offload_create fs/io_uring.c:7595 [inline] io_uring_create fs/io_uring.c:8671 [inline] io_uring_setup+0x1495/0x29a0 fs/io_uring.c:8744 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5b9 Code: Bad RIP value. RSP: 002b:00007f85c0b28bf8 EFLAGS: 00000206 ORIG_RAX: 00000000000001a9 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 000000000045d5b9 RDX: 0000000020ffe000 RSI: 0000000020000200 RDI: 00000000000016bd RBP: 000000000118cf98 R08: 00000000200000c0 R09: 00000000200000c0 R10: 0000000020000040 R11: 0000000000000206 R12: 0000000020ffe000 R13: 0000000020ffc000 R14: 00000000200000c0 R15: 0000000020000040 INFO: task syz-executor.5:12673 blocked for more than 143 seconds. Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:29800 pid:12673 ppid: 6870 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3777 [inline] __schedule+0xea9/0x2230 kernel/sched/core.c:4526 schedule+0xd0/0x2a0 kernel/sched/core.c:4601 schedule_timeout+0x1d8/0x250 kernel/time/timer.c:1855 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x163/0x260 kernel/sched/completion.c:138 io_sq_thread_stop fs/io_uring.c:6906 [inline] io_finish_async fs/io_uring.c:6920 [inline] io_sq_offload_create fs/io_uring.c:7595 [inline] io_uring_create fs/io_uring.c:8671 [inline] io_uring_setup+0x1495/0x29a0 fs/io_uring.c:8744 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5b9 Code: Bad RIP value. RSP: 002b:00007f85c0b28bf8 EFLAGS: 00000206 ORIG_RAX: 00000000000001a9 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 000000000045d5b9 RDX: 0000000020ffe000 RSI: 0000000020000200 RDI: 00000000000016bd RBP: 000000000118cf98 R08: 00000000200000c0 R09: 00000000200000c0 R10: 0000000020000040 R11: 0000000000000206 R12: 0000000020ffe000 R13: 0000000020ffc000 R14: 00000000200000c0 R15: 0000000020000040 INFO: task syz-executor.5:12719 can't die for more than 143 seconds. task:syz-executor.5 state:D stack:29560 pid:12719 ppid: 6870 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3777 [inline] __schedule+0xea9/0x2230 kernel/sched/core.c:4526 schedule+0xd0/0x2a0 kernel/sched/core.c:4601 schedule_timeout+0x1d8/0x250 kernel/time/timer.c:1855 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x163/0x260 kernel/sched/completion.c:138 io_sq_thread_stop fs/io_uring.c:6906 [inline] io_finish_async fs/io_uring.c:6920 [inline] io_sq_offload_create fs/io_uring.c:7595 [inline] io_uring_create fs/io_uring.c:8671 [inline] io_uring_setup+0x1495/0x29a0 fs/io_uring.c:8744 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5b9 Code: Bad RIP value. RSP: 002b:00007f85c0b07bf8 EFLAGS: 00000206 ORIG_RAX: 00000000000001a9 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 000000000045d5b9 RDX: 0000000020ffe000 RSI: 0000000020000200 RDI: 00000000000016bd RBP: 000000000118d038 R08: 00000000200000c0 R09: 00000000200000c0 R10: 0000000020000040 R11: 0000000000000206 R12: 0000000020ffe000 R13: 0000000020ffc000 R14: 00000000200000c0 R15: 0000000020000040 INFO: task syz-executor.5:12719 blocked for more than 144 seconds. Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:29560 pid:12719 ppid: 6870 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3777 [inline] __schedule+0xea9/0x2230 kernel/sched/core.c:4526 schedule+0xd0/0x2a0 kernel/sched/core.c:4601 schedule_timeout+0x1d8/0x250 kernel/time/timer.c:1855 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x163/0x260 kernel/sched/completion.c:138 io_sq_thread_stop fs/io_uring.c:6906 [inline] io_finish_async fs/io_uring.c:6920 [inline] io_sq_offload_create fs/io_uring.c:7595 [inline] io_uring_create fs/io_uring.c:8671 [inline] io_uring_setup+0x1495/0x29a0 fs/io_uring.c:8744 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5b9 Code: Bad RIP value. RSP: 002b:00007f85c0b07bf8 EFLAGS: 00000206 ORIG_RAX: 00000000000001a9 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 000000000045d5b9 RDX: 0000000020ffe000 RSI: 0000000020000200 RDI: 00000000000016bd RBP: 000000000118d038 R08: 00000000200000c0 R09: 00000000200000c0 R10: 0000000020000040 R11: 0000000000000206 R12: 0000000020ffe000 R13: 0000000020ffc000 R14: 00000000200000c0 R15: 0000000020000040 INFO: task io_uring-sq:12675 blocked for more than 144 seconds. Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:io_uring-sq state:D stack:31200 pid:12675 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:3777 [inline] __schedule+0xea9/0x2230 kernel/sched/core.c:4526 schedule+0xd0/0x2a0 kernel/sched/core.c:4601 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4660 kthread+0x2ac/0x4a0 kernel/kthread.c:285 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 INFO: task io_uring-sq:12720 blocked for more than 144 seconds. Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:io_uring-sq state:D stack:31120 pid:12720 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:3777 [inline] __schedule+0xea9/0x2230 kernel/sched/core.c:4526 schedule+0xd0/0x2a0 kernel/sched/core.c:4601 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4660 kthread+0x2ac/0x4a0 kernel/kthread.c:285 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Showing all locks held in the system: 1 lock held by khungtaskd/1163: #0: ffffffff89c67500 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5829 1 lock held by in:imklog/6545: #0: ffff8880a7938bb0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930 2 locks held by rs:main Q:Reg/6546: #0: ffff8880ae735fd8 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1292 [inline] #0: ffff8880ae735fd8 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x270/0x2230 kernel/sched/core.c:4444 #1: ffff8880ae720ec8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2fb/0x400 kernel/sched/psi.c:833 2 locks held by agetty/6807: #0: ffff8880a61bc098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:266 #1: ffffc90000f052e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x223/0x1a30 drivers/tty/n_tty.c:2156 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1163 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x198/0x1fd lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:147 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:253 [inline] watchdog+0xd89/0xf30 kernel/hung_task.c:339 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 3909 Comm: systemd-journal Not tainted 5.9.0-rc3-next-20200903-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__update_blocked_fair kernel/sched/fair.c:7897 [inline] RIP: 0010:update_blocked_averages+0x54f/0x1540 kernel/sched/fair.c:7991 Code: 3c 20 00 0f 85 1e 0b 00 00 4d 8b ae 90 01 00 00 4d 8d be a0 00 00 00 49 8d bd 18 01 00 00 48 89 f8 48 c1 e8 03 42 80 3c 20 00 <0f> 85 35 0a 00 00 48 8b 44 24 58 49 03 85 18 01 00 00 49 89 c5 48 RSP: 0018:ffffc90000da8ea0 EFLAGS: 00000046 RAX: 1ffffffff17f2763 RBX: ffff8880ae736848 RCX: 0000000000000268 RDX: 1ffff11015ce6c23 RSI: ffff8880ae736080 RDI: ffffffff8bf93b18 RBP: ffffc90000da8f40 R08: 000000000000ac00 R09: 000000000000023d R10: 0000000000020400 R11: 0000000000000001 R12: dffffc0000000000 R13: ffffffff8bf93a00 R14: ffff8880ae736080 R15: ffff8880ae736120 FS: 00007fca485d08c0(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fca450af018 CR3: 0000000093244000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: run_rebalance_domains+0xdb/0x130 kernel/sched/fair.c:10607 __do_softirq+0x1f7/0xa91 kernel/softirq.c:298 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] do_softirq_own_stack+0x9d/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x235/0x280 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581 RIP: 0010:unwind_next_frame+0x1273/0x1f90 arch/x86/kernel/unwind_orc.c:590 Code: 89 44 24 18 e8 7e c8 81 00 4c 8b 44 24 18 e9 89 fd ff ff 80 3d 80 2b 84 09 00 0f 85 4f f1 ff ff e9 b0 17 00 00 4c 8b 64 24 60 <49> 8d 78 02 48 b9 00 00 00 00 00 fc ff df 49 8d 57 40 48 89 f8 48 RSP: 0018:ffffc90005e575a8 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 1ffff92000bcaebd RCX: 0000000000000001 RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffffc90005e57728 RBP: 0000000000000001 R08: ffffffff8b2603f4 R09: ffffffff8b2603f8 R10: 000000000007201e R11: 0000000000000001 R12: ffffc90005e57768 R13: ffffc90005e57705 R14: ffffc90005e57720 R15: ffffc90005e576d0 __unwind_start+0x517/0x800 arch/x86/kernel/unwind_orc.c:702 unwind_start arch/x86/include/asm/unwind.h:60 [inline] arch_stack_walk+0x5e/0xf0 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:123 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:461 slab_post_alloc_hook mm/slab.h:517 [inline] slab_alloc mm/slab.c:3312 [inline] kmem_cache_alloc+0x13a/0x3a0 mm/slab.c:3482 kmem_cache_zalloc include/linux/slab.h:656 [inline] __alloc_file+0x21/0x350 fs/file_table.c:101 alloc_empty_file+0x6d/0x170 fs/file_table.c:151 path_openat+0xe3/0x2730 fs/namei.c:3354 do_filp_open+0x17e/0x3c0 fs/namei.c:3395 do_sys_openat2+0x16d/0x420 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_sys_open fs/open.c:1192 [inline] __se_sys_open fs/open.c:1188 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1188 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fca47b6085d Code: bb 20 00 00 75 10 b8 02 00 00 00 0f 05 48 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 b8 02 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 67 f6 ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007ffc21457e10 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffc21458120 RCX: 00007fca47b6085d RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055a701927fc0 RBP: 000000000000000d R08: 000000000000c8c1 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000293 R12: 00000000ffffffff R13: 000055a70191c040 R14: 00007ffc214580e0 R15: 000055a701929740