INFO: task syz-executor.4:7797 blocked for more than 143 seconds. Not tainted 5.4.0-rc2+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D27680 7797 7551 0x80000000 Call Trace: context_switch kernel/sched/core.c:3384 [inline] __schedule+0x8c4/0x19d0 kernel/sched/core.c:4069 schedule+0xc0/0x260 kernel/sched/core.c:4136 rwsem_down_read_slowpath+0x568/0xfd0 kernel/locking/rwsem.c:1102 __down_read kernel/locking/rwsem.c:1344 [inline] down_read+0x1f5/0x430 kernel/locking/rwsem.c:1497 exit_mm kernel/exit.c:451 [inline] do_exit+0x3a6/0x2c70 kernel/exit.c:804 do_group_exit+0xf4/0x2e0 kernel/exit.c:921 __do_sys_exit_group kernel/exit.c:932 [inline] __se_sys_exit_group kernel/exit.c:930 [inline] __x64_sys_exit_group+0x39/0x40 kernel/exit.c:930 do_syscall_64+0xca/0x5d0 arch/x86/entry/common.c:290 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:00007ffe20820658 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 000000000000001e RCX: 0000000000459519 RDX: 0000000000413201 RSI: fffffffffffffff7 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffffffffffff R09: 00007ffe208206b0 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffe208206b0 R14: 0000000000000000 R15: 00007ffe208206c0 INFO: task syz-executor.4:7814 blocked for more than 143 seconds. Not tainted 5.4.0-rc2+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D29280 7814 7551 0x80004000 Call Trace: context_switch kernel/sched/core.c:3384 [inline] __schedule+0x8c4/0x19d0 kernel/sched/core.c:4069 schedule+0xc0/0x260 kernel/sched/core.c:4136 rwsem_down_read_slowpath+0x568/0xfd0 kernel/locking/rwsem.c:1102 __down_read kernel/locking/rwsem.c:1344 [inline] down_read+0x1f5/0x430 kernel/locking/rwsem.c:1497 exit_mm kernel/exit.c:451 [inline] do_exit+0x3a6/0x2c70 kernel/exit.c:804 do_group_exit+0xf4/0x2e0 kernel/exit.c:921 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+0x4e8/0x5d0 arch/x86/entry/common.c:300 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459519 Code: Bad RIP value. RSP: 002b:00007f97ec96fcf8 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: 00007ffe2082044f R14: 00007f97ec9709c0 R15: 000000000075bfd4 INFO: task syz-executor.0:7849 blocked for more than 144 seconds. Not tainted 5.4.0-rc2+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28144 7849 7548 0x80000000 Call Trace: context_switch kernel/sched/core.c:3384 [inline] __schedule+0x8c4/0x19d0 kernel/sched/core.c:4069 schedule+0xc0/0x260 kernel/sched/core.c:4136 rwsem_down_read_slowpath+0x568/0xfd0 kernel/locking/rwsem.c:1102 __down_read kernel/locking/rwsem.c:1344 [inline] down_read+0x1f5/0x430 kernel/locking/rwsem.c:1497 exit_mm kernel/exit.c:451 [inline] do_exit+0x3a6/0x2c70 kernel/exit.c:804 do_group_exit+0xf4/0x2e0 kernel/exit.c:921 __do_sys_exit_group kernel/exit.c:932 [inline] __se_sys_exit_group kernel/exit.c:930 [inline] __x64_sys_exit_group+0x39/0x40 kernel/exit.c:930 do_syscall_64+0xca/0x5d0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459519 Code: Bad RIP value. RSP: 002b:00007fffe3830928 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 000000000000001e RCX: 0000000000459519 RDX: 0000000000413201 RSI: fffffffffffffff7 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffffffffffff R09: 00007fffe3830980 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000001 R13: 00007fffe3830980 R14: 0000000000000000 R15: 00007fffe3830990 INFO: task syz-executor.0:7856 blocked for more than 144 seconds. Not tainted 5.4.0-rc2+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28920 7856 7548 0x80004000 Call Trace: context_switch kernel/sched/core.c:3384 [inline] __schedule+0x8c4/0x19d0 kernel/sched/core.c:4069 schedule+0xc0/0x260 kernel/sched/core.c:4136 rwsem_down_read_slowpath+0x568/0xfd0 kernel/locking/rwsem.c:1102 __down_read kernel/locking/rwsem.c:1344 [inline] down_read+0x1f5/0x430 kernel/locking/rwsem.c:1497 exit_mm kernel/exit.c:451 [inline] do_exit+0x3a6/0x2c70 kernel/exit.c:804 do_group_exit+0xf4/0x2e0 kernel/exit.c:921 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+0x4e8/0x5d0 arch/x86/entry/common.c:300 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:00007f6012fb4cf8 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: 00007fffe383071f R14: 00007f6012fb59c0 R15: 000000000075bfd4 Showing all locks held in the system: 1 lock held by khungtaskd/1058: #0: ffffffff883a4000 (rcu_read_lock){....}, at: debug_show_all_locks+0x5b/0x27a kernel/locking/lockdep.c:5337 1 lock held by rsyslogd/7344: #0: ffff8880870838e0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xa3/0xc0 fs/file.c:801 2 locks held by getty/7433: #0: ffff8880974ea090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005ee52e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1930 drivers/tty/n_tty.c:2156 2 locks held by getty/7434: #0: ffff88809121c090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f0d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1930 drivers/tty/n_tty.c:2156 2 locks held by getty/7435: #0: ffff8880a126b090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f092e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1930 drivers/tty/n_tty.c:2156 2 locks held by getty/7436: #0: ffff8880a7b0c090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005ef12e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1930 drivers/tty/n_tty.c:2156 2 locks held by getty/7437: #0: ffff88809a5e5090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f112e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1930 drivers/tty/n_tty.c:2156 2 locks held by getty/7438: #0: ffff88809081d090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f052e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1930 drivers/tty/n_tty.c:2156 2 locks held by getty/7439: #0: ffff8880a80a1090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005ed92e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x1ee/0x1930 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.4/7797: #0: ffff88807f4d6198 (&mm->mmap_sem#2){++++}, at: exit_mm kernel/exit.c:451 [inline] #0: ffff88807f4d6198 (&mm->mmap_sem#2){++++}, at: do_exit+0x3a6/0x2c70 kernel/exit.c:804 6 locks held by syz-executor.4/7803: 1 lock held by syz-executor.4/7814: #0: ffff88807f4d6198 (&mm->mmap_sem#2){++++}, at: exit_mm kernel/exit.c:451 [inline] #0: ffff88807f4d6198 (&mm->mmap_sem#2){++++}, at: do_exit+0x3a6/0x2c70 kernel/exit.c:804 1 lock held by syz-executor.0/7849: #0: ffff8880a914a818 (&mm->mmap_sem#2){++++}, at: exit_mm kernel/exit.c:451 [inline] #0: ffff8880a914a818 (&mm->mmap_sem#2){++++}, at: do_exit+0x3a6/0x2c70 kernel/exit.c:804 1 lock held by syz-executor.0/7850: 1 lock held by syz-executor.0/7856: #0: ffff8880a914a818 (&mm->mmap_sem#2){++++}, at: exit_mm kernel/exit.c:451 [inline] #0: ffff8880a914a818 (&mm->mmap_sem#2){++++}, at: do_exit+0x3a6/0x2c70 kernel/exit.c:804 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1058 Comm: khungtaskd Not tainted 5.4.0-rc2+ #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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7803 Comm: syz-executor.4 Not tainted 5.4.0-rc2+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rol32 include/linux/bitops.h:90 [inline] RIP: 0010:iterate_chain_key kernel/locking/lockdep.c:368 [inline] RIP: 0010:__lock_acquire+0x7ca/0x4ef0 kernel/locking/lockdep.c:3943 Code: 44 01 e2 c1 c0 08 31 c1 89 c8 41 29 cc c1 c0 10 41 31 c4 8d 04 11 44 89 e1 44 29 e2 c1 c9 0d 89 c6 41 01 c4 31 ca 41 8d 04 14 <89> d1 29 d6 c1 c1 04 31 f1 48 c1 e1 20 48 09 c1 48 83 bd 70 ff ff RSP: 0018:ffff88807ea27750 EFLAGS: 00000082 RAX: 0000000019c5db91 RBX: 0000000000000001 RCX: 0000000000ce0293 RDX: 00000000fb95ac2c RSI: 000000005dddcf4c RDI: ffff88809307cfa1 RBP: ffff88807ea27870 R08: fffffbfff1349b48 R09: fffffbfff1349b48 R10: ffff88809307cf80 R11: ffff88809307c6c0 R12: 000000001e302f65 R13: ac0ae2c262f097d9 R14: 0000000000000000 R15: 0000000000000006 FS: 00007f97ec991700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000000949d5000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x194/0x410 kernel/locking/lockdep.c:4487 __mutex_lock_common kernel/locking/mutex.c:956 [inline] __mutex_lock+0x155/0x1410 kernel/locking/mutex.c:1103 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118 perf_mmap+0x64a/0x1740 kernel/events/core.c:5783 call_mmap include/linux/fs.h:1900 [inline] mmap_region+0x9ba/0x1480 mm/mmap.c:1806 do_mmap+0x61e/0xfc0 mm/mmap.c:1577 do_mmap_pgoff include/linux/mm.h:2353 [inline] vm_mmap_pgoff+0x195/0x210 mm/util.c:496 ksys_mmap_pgoff+0x3c7/0x650 mm/mmap.c:1629 __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+0xca/0x5d0 arch/x86/entry/common.c:290 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:00007f97ec990c78 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: 00007f97ec9916d4 R13: 00000000004c5822 R14: 00000000004d9ed8 R15: 00000000ffffffff