INFO: task syz-executor346:9975 blocked for more than 143 seconds. Not tainted 5.3.0-rc1+ #79 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor346 D27640 9975 9974 0x20024004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x755/0x1580 kernel/sched/core.c:3880 schedule+0xa8/0x270 kernel/sched/core.c:3944 rwsem_down_read_slowpath+0x4cc/0xf90 kernel/locking/rwsem.c:1079 __down_read kernel/locking/rwsem.c:1304 [inline] down_read+0x1f4/0x3f0 kernel/locking/rwsem.c:1447 do_user_addr_fault arch/x86/mm/fault.c:1395 [inline] __do_page_fault+0xaa2/0xdd0 arch/x86/mm/fault.c:1509 do_page_fault+0x38/0x590 arch/x86/mm/fault.c:1533 page_fault+0x39/0x40 arch/x86/entry/entry_64.S:1200 RIP: 0023:0x80a57d0 Code: Bad RIP value. RSP: 002b:00000000fff5571c EFLAGS: 00010202 RAX: 0000000000000000 RBX: 0000000000000002 RCX: 00000000080fd468 RDX: 000000000804ea60 RSI: 00000000080fa0ac RDI: 00000000080fd460 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor346:9976 blocked for more than 143 seconds. Not tainted 5.3.0-rc1+ #79 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor346 D28520 9976 9974 0xa0024004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x755/0x1580 kernel/sched/core.c:3880 schedule+0xa8/0x270 kernel/sched/core.c:3944 rwsem_down_read_slowpath+0x4cc/0xf90 kernel/locking/rwsem.c:1079 __down_read kernel/locking/rwsem.c:1304 [inline] down_read+0x1f4/0x3f0 kernel/locking/rwsem.c:1447 exit_mm kernel/exit.c:513 [inline] do_exit+0x47b/0x2eb0 kernel/exit.c:865 do_group_exit+0x135/0x360 kernel/exit.c:982 get_signal+0x47c/0x2500 kernel/signal.c:2728 do_signal+0x87/0x1700 arch/x86/kernel/signal.c:815 exit_to_usermode_loop+0x286/0x380 arch/x86/entry/common.c:159 prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline] syscall_return_slowpath arch/x86/entry/common.c:274 [inline] do_syscall_32_irqs_on arch/x86/entry/common.c:347 [inline] do_fast_syscall_32+0xb87/0xdb3 arch/x86/entry/common.c:403 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7fc89c9 Code: Bad RIP value. RSP: 002b:00000000f7fc41ec EFLAGS: 00000296 ORIG_RAX: 00000000000000f0 RAX: fffffffffffffe00 RBX: 00000000080fb008 RCX: 0000000000000080 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000002405 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: lockdep is turned off. NMI backtrace for cpu 0 CPU: 0 PID: 1057 Comm: khungtaskd Not tainted 5.3.0-rc1+ #79 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+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x23b/0x28b lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0x9d0/0xef0 kernel/hung_task.c:289 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 9977 Comm: syz-executor346 Not tainted 5.3.0-rc1+ #79 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:trace_lock_acquire include/trace/events/lock.h:13 [inline] RIP: 0010:lock_acquire+0x15c/0x410 kernel/locking/lockdep.c:4412 Code: d2 be 08 00 00 00 48 89 d0 48 89 55 c0 48 c1 f8 06 48 8d 3c c5 f8 63 a5 89 e8 b0 9e 53 00 48 8b 55 c0 48 0f a3 15 fc 6b 4c 08 <0f> 82 bb 01 00 00 4c 8b 4d c8 41 89 d8 6a 00 44 89 f2 6a 00 4c 89 RSP: 0018:ffff888092a97890 EFLAGS: 00000047 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff8158f7f0 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffffff89a563f8 RBP: ffff888092a978d8 R08: 1ffffffff134ac7f R09: fffffbfff134ac80 R10: fffffbfff134ac7f R11: ffffffff89a563ff R12: ffff888091598690 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae900000(0063) knlGS:00000000f7fa3b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 000000009353b000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __mutex_lock_common kernel/locking/mutex.c:926 [inline] __mutex_lock+0xf7/0x1340 kernel/locking/mutex.c:1073 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1088 perf_mmap+0x736/0x19b0 kernel/events/core.c:5700 call_mmap include/linux/fs.h:1875 [inline] mmap_region+0xc35/0x1760 mm/mmap.c:1788 do_mmap+0x82e/0x1090 mm/mmap.c:1561 do_mmap_pgoff include/linux/mm.h:2374 [inline] vm_mmap_pgoff+0x1c5/0x230 mm/util.c:391 ksys_mmap_pgoff+0x4aa/0x630 mm/mmap.c:1611 __do_sys_mmap_pgoff mm/mmap.c:1622 [inline] __se_sys_mmap_pgoff mm/mmap.c:1618 [inline] __ia32_sys_mmap_pgoff+0xdd/0x1a0 mm/mmap.c:1618 do_syscall_32_irqs_on arch/x86/entry/common.c:332 [inline] do_fast_syscall_32+0x27b/0xdb3 arch/x86/entry/common.c:403 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7fc89c9 Code: d3 83 c4 10 5b 5e 5d c3 ba 80 96 98 00 eb a9 8b 04 24 c3 8b 34 24 c3 8b 3c 24 c3 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f7fa31ec EFLAGS: 00000292 ORIG_RAX: 00000000000000c0 RAX: ffffffffffffffda RBX: 0000000020ffd000 RCX: 0000000000003000 RDX: 0000000003000001 RSI: 0000000000001011 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000