INFO: task syz-executor509:9863 blocked for more than 143 seconds. Not tainted 5.3.0-rc1+ #105 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor509 D28384 9863 9860 0x00004004 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: 0033:0x4ab79d Code: Bad RIP value. RSP: 002b:00007ffd6c770300 EFLAGS: 00010206 RAX: 00000000004ab8c0 RBX: 0000000000000001 RCX: 00000000006e0330 RDX: 0000000000407620 RSI: 0000000000000000 RDI: 00000000004ccb90 RBP: 00007ffd6c770320 R08: 000000037ffffa00 R09: 000000037ffffa00 R10: 00007ffd6c770390 R11: 0000000000000000 R12: 0000000000000001 R13: 00000000006e0320 R14: 000000000000002d R15: 20c49ba5e353f7cf INFO: task syz-executor509:9864 blocked for more than 143 seconds. Not tainted 5.3.0-rc1+ #105 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor509 D28456 9864 9860 0x80004004 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_64+0x5a9/0x6a0 arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4468f9 Code: 67 66 69 6c 65 3d 64 65 62 75 67 2e 63 22 0a 00 00 45 52 52 4f 52 3a 20 6f 75 74 20 6f 66 20 6d 65 6d 6f 72 79 20 64 75 72 69 <6e> 67 20 64 65 62 75 67 20 73 65 74 75 70 0a 00 00 00 00 00 00 00 RSP: 002b:00007fccacee4db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00000000006dbc28 RCX: 00000000004468f9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc28 RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c R13: 00007ffd6c7702ff R14: 00007fccacee59c0 R15: 20c49ba5e353f7cf INFO: lockdep is turned off. NMI backtrace for cpu 0 CPU: 0 PID: 1057 Comm: khungtaskd Not tainted 5.3.0-rc1+ #105 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: 9865 Comm: syz-executor509 Not tainted 5.3.0-rc1+ #105 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:debug_lockdep_rcu_enabled+0x75/0xa0 kernel/rcu/update.c:238 Code: c1 83 e0 07 48 c1 e9 03 83 c0 03 0f b6 14 11 38 d0 7c 04 84 d2 75 23 8b 05 ac 69 46 08 85 c0 74 07 e8 2f ff ff ff 5d c3 31 c0 <5d> c3 48 c7 c7 e4 64 a5 89 e8 9d 93 4d 00 eb a9 48 c7 c7 f4 95 a5 RSP: 0018:ffff8880938778e0 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 1ffff1101270ef23 RCX: 1ffffffff134b2be RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff89a563f8 RBP: ffff8880938778e0 R08: 1ffffffff134ac7f R09: fffffbfff134ac80 R10: fffffbfff134ac7f R11: ffffffff89a563ff R12: ffff888091d68e10 R13: ffffffff818afe97 R14: ffff888093877998 R15: 0000000000000001 FS: 00007fccacec4700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000000a0107000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_lock_release include/trace/events/lock.h:58 [inline] lock_release+0x60a/0x960 kernel/locking/lockdep.c:4431 __mutex_unlock_slowpath+0x8e/0x6b0 kernel/locking/mutex.c:1198 mutex_unlock+0xd/0x10 kernel/locking/mutex.c:714 perf_mmap+0x727/0x19b0 kernel/events/core.c:5713 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 arch/x86/kernel/sys_x86_64.c:100 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline] __x64_sys_mmap+0xe9/0x1b0 arch/x86/kernel/sys_x86_64.c:91 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4468f9 Code: e8 5c b3 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 0b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fccacec3da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 00000000004468f9 RDX: 0000000003000001 RSI: 0000000000003000 RDI: 0000000020ffd000 RBP: 00000000006dbc30 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000001011 R11: 0000000000000246 R12: 00000000006dbc3c R13: 00007ffd6c7702ff R14: 00007fccacec49c0 R15: 20c49ba5e353f7cf