INFO: task syz-executor.0:26260 blocked for more than 143 seconds. Not tainted 5.3.0-rc3-next-20190806 #60 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28384 26260 10137 0x80000000 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x755/0x15b0 kernel/sched/core.c:3921 schedule+0xa8/0x270 kernel/sched/core.c:3985 rwsem_down_read_slowpath+0x4cc/0xfb0 kernel/locking/rwsem.c:1090 __down_read kernel/locking/rwsem.c:1320 [inline] down_read+0x1f4/0x3f0 kernel/locking/rwsem.c:1463 exit_mm kernel/exit.c:513 [inline] do_exit+0x47b/0x2e50 kernel/exit.c:866 do_group_exit+0x135/0x360 kernel/exit.c:983 __do_sys_exit_group kernel/exit.c:994 [inline] __se_sys_exit_group kernel/exit.c:992 [inline] __x64_sys_exit_group+0x44/0x50 kernel/exit.c:992 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459829 Code: Bad RIP value. RSP: 002b:00007ffda2732d88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 000000000000001e RCX: 0000000000459829 RDX: 0000000000413511 RSI: fffffffffffffff7 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffffffffffff R09: 00007ffda2732de0 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffda2732de0 R14: 0000000000000000 R15: 00007ffda2732df0 INFO: task syz-executor.0:26274 blocked for more than 143 seconds. Not tainted 5.3.0-rc3-next-20190806 #60 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28200 26274 10137 0x80004000 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x755/0x15b0 kernel/sched/core.c:3921 schedule+0xa8/0x270 kernel/sched/core.c:3985 rwsem_down_read_slowpath+0x4cc/0xfb0 kernel/locking/rwsem.c:1090 __down_read kernel/locking/rwsem.c:1320 [inline] down_read+0x1f4/0x3f0 kernel/locking/rwsem.c:1463 exit_mm kernel/exit.c:513 [inline] do_exit+0x47b/0x2e50 kernel/exit.c:866 do_group_exit+0x135/0x360 kernel/exit.c:983 get_signal+0x47c/0x2500 kernel/signal.c:2729 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+0x65f/0x760 arch/x86/entry/common.c:300 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459829 Code: Bad RIP value. RSP: 002b:00007fe1adf07cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000075bf28 RCX: 0000000000459829 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075bf28 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bf2c R13: 00007ffda2732b7f R14: 00007fe1adf089c0 R15: 000000000075bf2c INFO: task syz-executor.0:26281 can't die for more than 143 seconds. syz-executor.0 R running task 29048 26281 10137 0x00004006 Call Trace: INFO: lockdep is turned off. NMI backtrace for cpu 1 CPU: 1 PID: 1060 Comm: khungtaskd Not tainted 5.3.0-rc3-next-20190806 #60 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:269 [inline] watchdog+0xc99/0x1360 kernel/hung_task.c:353 kthread+0x361/0x430 kernel/kthread.c:255 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: 26281 Comm: syz-executor.0 Not tainted 5.3.0-rc3-next-20190806 #60 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__mutex_trylock_or_owner kernel/locking/mutex.c:112 [inline] RIP: 0010:__mutex_trylock kernel/locking/mutex.c:126 [inline] RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:932 [inline] RIP: 0010:__mutex_lock+0x430/0x13c0 kernel/locking/mutex.c:1077 Code: 8b 35 a4 91 4e 03 85 f6 0f 84 aa 00 00 00 48 83 e3 fd be 08 00 00 00 4c 89 f7 e8 9b c2 6d fa 4c 09 eb 4c 89 f8 f0 49 0f b1 1e <49> 39 c7 74 1e 48 ba 00 00 00 00 00 fc ff df 49 89 c7 e9 5c fd ff RSP: 0018:ffff88808b82f910 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff888094806140 RCX: ffffffff873f2f15 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88809a84abf0 RBP: ffff88808b82fa80 R08: 1ffff1101350957e R09: ffffed101350957f R10: ffffed101350957e R11: ffff88809a84abf7 R12: fffffbfff134c9ce R13: ffff888094806140 R14: ffff88809a84abf0 R15: 0000000000000000 FS: 00007fe1adee7700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f99d039a000 CR3: 00000000a40cb000 CR4: 00000000001406f0 Call Trace: mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 perf_mmap+0x743/0x1920 kernel/events/core.c:5698 call_mmap include/linux/fs.h:1884 [inline] mmap_region+0xc35/0x1760 mm/mmap.c:1799 do_mmap+0x82e/0x1150 mm/mmap.c:1572 do_mmap_pgoff include/linux/mm.h:2395 [inline] vm_mmap_pgoff+0x1c5/0x230 mm/util.c:496 ksys_mmap_pgoff+0x4aa/0x630 mm/mmap.c:1622 __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+0xfa/0x760 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459829 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fe1adee6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000459829 RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000020ffd000 RBP: 000000000075bfc8 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000001011 R11: 0000000000000246 R12: 00007fe1adee76d4 R13: 00000000004c5d71 R14: 00000000004da748 R15: 00000000ffffffff