INFO: task syz-executor.2:7534 blocked for more than 143 seconds. Not tainted 5.3.0-rc8+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D27528 7534 7485 0x80000000 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x713/0x1520 kernel/sched/core.c:3880 schedule+0xc0/0x260 kernel/sched/core.c:3947 rwsem_down_read_slowpath+0x568/0xfd0 kernel/locking/rwsem.c:1090 __down_read kernel/locking/rwsem.c:1320 [inline] down_read+0x1f5/0x3f0 kernel/locking/rwsem.c:1463 exit_mm kernel/exit.c:513 [inline] do_exit+0x3b2/0x2c10 kernel/exit.c:866 do_group_exit+0xf4/0x2e0 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+0x39/0x40 kernel/exit.c:992 do_syscall_64+0xd0/0x540 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459519 Code: Bad RIP value. RSP: 002b:00007ffda66f28e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 000000000000001e RCX: 0000000000459519 RDX: 0000000000413201 RSI: fffffffffffffff7 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffffffffffff R09: 00007ffda66f2940 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffda66f2940 R14: 0000000000000000 R15: 00007ffda66f2950 INFO: task syz-executor.2:7553 blocked for more than 143 seconds. Not tainted 5.3.0-rc8+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D29288 7553 7485 0x80004000 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x713/0x1520 kernel/sched/core.c:3880 schedule+0xc0/0x260 kernel/sched/core.c:3947 rwsem_down_read_slowpath+0x568/0xfd0 kernel/locking/rwsem.c:1090 __down_read kernel/locking/rwsem.c:1320 [inline] down_read+0x1f5/0x3f0 kernel/locking/rwsem.c:1463 exit_mm kernel/exit.c:513 [inline] do_exit+0x3b2/0x2c10 kernel/exit.c:866 do_group_exit+0xf4/0x2e0 kernel/exit.c:983 get_signal+0x36c/0x1d50 kernel/signal.c:2734 do_signal+0x87/0x1710 arch/x86/kernel/signal.c:815 exit_to_usermode_loop+0x114/0x210 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+0x462/0x540 arch/x86/entry/common.c:299 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459519 Code: Bad RIP value. RSP: 002b:00007f6549b86cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000075bfd0 RCX: 0000000000459519 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075bfd0 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bfd4 R13: 00007ffda66f26df R14: 00007f6549b879c0 R15: 000000000075bfd4 Showing all locks held in the system: 1 lock held by khungtaskd/1034: #0: 0000000014d0b33c (rcu_read_lock){....}, at: debug_show_all_locks+0x5b/0x27a kernel/locking/lockdep.c:5256 1 lock held by rsyslogd/7278: #0: 0000000086d53121 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xa3/0xc0 fs/file.c:801 2 locks held by getty/7368: #0: 000000009ed52848 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: 0000000034bc7b01 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1930 drivers/tty/n_tty.c:2156 2 locks held by getty/7369: #0: 00000000b6c5086d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: 0000000054855939 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1930 drivers/tty/n_tty.c:2156 2 locks held by getty/7370: #0: 00000000e2d24e2b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: 000000001a3f8984 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1930 drivers/tty/n_tty.c:2156 2 locks held by getty/7371: #0: 000000006a3a8632 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: 00000000eeca0d8b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1930 drivers/tty/n_tty.c:2156 2 locks held by getty/7372: #0: 00000000ece76dd5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: 000000003fc43dff (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1930 drivers/tty/n_tty.c:2156 2 locks held by getty/7373: #0: 0000000023305f23 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: 0000000055c74895 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1930 drivers/tty/n_tty.c:2156 2 locks held by getty/7374: #0: 00000000a65c3d3a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: 00000000d1f6da0b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1930 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.2/7534: #0: 00000000be0b5a0f (&mm->mmap_sem#2){++++}, at: exit_mm kernel/exit.c:513 [inline] #0: 00000000be0b5a0f (&mm->mmap_sem#2){++++}, at: do_exit+0x3b2/0x2c10 kernel/exit.c:866 1 lock held by syz-executor.2/7540: 1 lock held by syz-executor.2/7553: #0: 00000000be0b5a0f (&mm->mmap_sem#2){++++}, at: exit_mm kernel/exit.c:513 [inline] #0: 00000000be0b5a0f (&mm->mmap_sem#2){++++}, at: do_exit+0x3b2/0x2c10 kernel/exit.c:866 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1034 Comm: khungtaskd Not tainted 5.3.0-rc8+ #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+0x113/0x167 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.7+0x4b/0x84 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x18b/0x1b7 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+0x592/0xb60 kernel/hung_task.c:289 kthread+0x331/0x3f0 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: 7540 Comm: syz-executor.2 Not tainted 5.3.0-rc8+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_acquire+0x72/0x4b70 kernel/locking/lockdep.c:3741 Code: ff 48 8d 85 78 ff ff ff 48 c1 e8 03 48 89 85 60 ff ff ff 48 89 c3 48 b8 00 00 00 00 00 fc ff df 48 8d 14 03 c7 02 f1 f1 f1 f1 42 04 00 f2 f2 f2 48 c7 c2 b4 ad f9 88 65 48 8b 1c 25 28 00 00 RSP: 0018:ffff888079c1f748 EFLAGS: 00000802 RAX: dffffc0000000000 RBX: 1ffff1100f383efd RCX: 0000000000000000 RDX: ffffed100f383efd RSI: 0000000000000000 RDI: ffff8880944417d0 RBP: ffff888079c1f870 R08: 0000000000000001 R09: 0000000000000000 R10: fffffbfff11f2f77 R11: ffff888079c10040 R12: 0000000000000000 R13: ffff8880944417d0 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f6549ba8700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 000000009504e000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x194/0x410 kernel/locking/lockdep.c:4412 __mutex_lock_common kernel/locking/mutex.c:930 [inline] __mutex_lock+0x155/0x1410 kernel/locking/mutex.c:1077 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1092 perf_mmap+0x652/0x1660 kernel/events/core.c:5700 call_mmap include/linux/fs.h:1875 [inline] mmap_region+0x9ba/0x1480 mm/mmap.c:1788 do_mmap+0x612/0xec0 mm/mmap.c:1561 do_mmap_pgoff include/linux/mm.h:2374 [inline] vm_mmap_pgoff+0x195/0x210 mm/util.c:391 ksys_mmap_pgoff+0x3c7/0x650 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+0xd0/0x540 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459519 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:00007f6549ba7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000459519 RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000020ffd000 RBP: 000000000075bf20 R08: 0000000000000003 R09: 0000000000000000 R10: 0080000000000011 R11: 0000000000000246 R12: 00007f6549ba86d4 R13: 00000000004c5822 R14: 00000000004d9ed8 R15: 00000000ffffffff