INFO: task syz-executor.1:1487 can't die for more than 143 seconds. syz-executor.1 D27352 1487 7321 0x00004004 Call Trace: schedule+0xd0/0x2a0 kernel/sched/core.c:4163 perf_event_free_task+0x4d8/0x680 kernel/events/core.c:12317 copy_process+0x481e/0x7110 kernel/fork.c:2342 _do_fork+0x12d/0x1010 kernel/fork.c:2430 __do_sys_clone+0xec/0x140 kernel/fork.c:2585 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45f259 Code: Bad RIP value. RSP: 002b:00007ffdd4896158 EFLAGS: 00000202 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f2f9a19d700 RCX: 000000000045f259 RDX: 00007f2f9a19d9d0 RSI: 00007f2f9a19cdb0 RDI: 00000000003d0f00 RBP: 00007ffdd4896370 R08: 00007f2f9a19d700 R09: 00007f2f9a19d700 R10: 00007f2f9a19d9d0 R11: 0000000000000202 R12: 0000000000000000 R13: 00007ffdd489620f R14: 0000000000020000 R15: 0000000001fd2b70 INFO: task syz-executor.1:1487 blocked for more than 143 seconds. Not tainted 5.7.0-rc1-next-20200413-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D27352 1487 7321 0x00004004 Call Trace: schedule+0xd0/0x2a0 kernel/sched/core.c:4163 perf_event_free_task+0x4d8/0x680 kernel/events/core.c:12317 copy_process+0x481e/0x7110 kernel/fork.c:2342 _do_fork+0x12d/0x1010 kernel/fork.c:2430 __do_sys_clone+0xec/0x140 kernel/fork.c:2585 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45f259 Code: Bad RIP value. RSP: 002b:00007ffdd4896158 EFLAGS: 00000202 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f2f9a19d700 RCX: 000000000045f259 RDX: 00007f2f9a19d9d0 RSI: 00007f2f9a19cdb0 RDI: 00000000003d0f00 RBP: 00007ffdd4896370 R08: 00007f2f9a19d700 R09: 00007f2f9a19d700 R10: 00007f2f9a19d9d0 R11: 0000000000000202 R12: 0000000000000000 R13: 00007ffdd489620f R14: 0000000000020000 R15: 0000000001fd2b70 Showing all locks held in the system: 1 lock held by khungtaskd/1138: #0: ffffffff899befc0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5754 1 lock held by in:imklog/7090: #0: ffff8880a7d7abb0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:826 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1138 Comm: khungtaskd Not tainted 5.7.0-rc1-next-20200413-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+0x188/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x231/0x27e lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:147 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:249 [inline] watchdog+0xde3/0x14e0 kernel/hung_task.c:333 kthread+0x388/0x470 kernel/kthread.c:268 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 1647 Comm: (d-rfkill) Not tainted 5.7.0-rc1-next-20200413-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x9/0x60 kernel/kcov.c:197 Code: cc 65 48 8b 04 25 00 1f 02 00 48 8b 80 f8 13 00 00 c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 65 48 8b 04 25 00 1f 02 00 <65> 8b 15 28 ea 8e 7e f7 c2 00 01 1f 00 48 8b 34 24 74 0f 80 e6 01 RSP: 0018:ffffc90009deff00 EFLAGS: 00000202 RAX: ffff88805daea040 RBX: 00000000fffffff7 RCX: ffffffff81bb4a4f RDX: 00000000000001f8 RSI: 0000000000000001 RDI: 0000000000000005 RBP: ffffc90009deff58 R08: ffff88805daea040 R09: ffffed10133c6d89 R10: ffff888099e36c43 R11: ffffed10133c6d88 R12: 00000000000001f8 R13: ffffffff8994c4f0 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fac95fb4500(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000045f22f CR3: 0000000084469000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __do_sys_close fs/open.c:1273 [inline] __se_sys_close fs/open.c:1268 [inline] __x64_sys_close+0x8a/0x100 fs/open.c:1268 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x7fac9485228d Code: c1 20 00 00 75 10 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 ee fb ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 37 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007fff4f5f2de0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 00000000000991c2 RCX: 00007fac9485228d RDX: 00007fff4f5f2e68 RSI: 00007fff4f5f2e60 RDI: 00000000000991c2 RBP: 0000000000100000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000008 R11: 0000000000000293 R12: 0000000000000002 R13: 00007fff4f5f2e60 R14: 0000000000000000 R15: 00007fff4f5f30e0