rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (1 GPs behind) idle=8ba/1/0x4000000000000004 softirq=282559/282560 fqs=5087 rcu: (t=10502 jiffies g=444333 q=10834) NMI backtrace for cpu 0 CPU: 0 PID: 9685 Comm: syz-executor.5 Not tainted 4.19.130-syzkaller #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+0x1fc/0x2fe lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x15f/0x19c kernel/rcu/tree.c:1340 print_cpu_stall kernel/rcu/tree.c:1478 [inline] check_cpu_stall kernel/rcu/tree.c:1550 [inline] __rcu_pending kernel/rcu/tree.c:3293 [inline] rcu_pending kernel/rcu/tree.c:3336 [inline] rcu_check_callbacks.cold+0x62d/0xe19 kernel/rcu/tree.c:2682 update_process_times+0x2a/0x70 kernel/time/timer.c:1638 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:168 tick_sched_timer+0xfc/0x290 kernel/time/tick-sched.c:1278 __run_hrtimer kernel/time/hrtimer.c:1401 [inline] __hrtimer_run_queues+0x3f6/0xe60 kernel/time/hrtimer.c:1463 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1521 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:lock_acquire+0x1ec/0x3c0 kernel/locking/lockdep.c:3910 Code: 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 b7 01 00 00 48 83 3d 19 ca 80 07 00 0f 84 2a 01 00 00 48 8b 7c 24 08 57 9d <0f> 1f 44 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 65 8b RSP: 0018:ffff8880ae607cc0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff11a4b69 RBX: ffff888087a0a6c0 RCX: 0000000000006c6c RDX: dffffc0000000000 RSI: 0000000083240d0b RDI: 0000000000000282 RBP: ffff8880ae607d48 R08: ffffffff8b407be0 R09: 0000000000000001 R10: ffff888087a0af70 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 call_timer_fn+0x113/0x700 kernel/time/timer.c:1323 expire_timers+0x243/0x4e0 kernel/time/timer.c:1363 __run_timers kernel/time/timer.c:1684 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1697 __do_softirq+0x26c/0x9a0 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:544 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:150 [inline] RIP: 0010:unwind_next_frame+0x279/0x1c60 arch/x86/kernel/unwind_orc.c:426 Code: 89 54 24 20 48 89 4c 24 18 e8 33 c6 70 00 4c 8b 44 24 30 48 8b 74 24 28 44 8b 54 24 20 48 8b 4c 24 18 46 8b 1c 85 54 69 84 8a <44> 8d 46 01 48 ba 00 00 00 00 00 fc ff df 4a 8d 3c 85 54 69 84 8a RSP: 0018:ffff8881d4e2f648 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 1ffff1103a9c5ed1 RCX: ffffffff810098f8 RDX: 0000000000000007 RSI: 0000000000000098 RDI: ffffffff8a846bb4 RBP: 0000000000000001 R08: 0000000000000098 R09: 0000000000000000 R10: 0000000000066071 R11: 00000000000001ec R12: ffff8881d4e2f778 R13: ffff8881d4e2f765 R14: ffff8881d4e2f768 R15: ffff8881d4e2f730 __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 kmem_cache_alloc_trace+0x12f/0x380 mm/slab.c:3625 kmalloc include/linux/slab.h:515 [inline] kzalloc include/linux/slab.h:709 [inline] superblock_alloc_security security/selinux/hooks.c:412 [inline] selinux_sb_alloc_security+0x41/0x210 security/selinux/hooks.c:2767 security_sb_alloc+0x40/0x90 security/security.c:364 alloc_super fs/super.c:228 [inline] sget_userns+0x213/0xcd0 fs/super.c:519 kernfs_mount_ns+0x11b/0x830 fs/kernfs/mount.c:325 kernfs_mount include/linux/kernfs.h:554 [inline] cgroup_do_mount+0xa8/0x4f0 kernel/cgroup/cgroup.c:2008 cgroup_mount+0x92f/0xb10 kernel/cgroup/cgroup.c:2075 mount_fs+0xa3/0x30c fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2469 [inline] do_mount+0x113c/0x2f10 fs/namespace.c:2799 ksys_mount+0xcf/0x130 fs/namespace.c:3015 __do_sys_mount fs/namespace.c:3029 [inline] __se_sys_mount fs/namespace.c:3026 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3026 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45cb19 Code: 0d 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f8d85c96c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000004f7240 RCX: 000000000045cb19 RDX: 00000000200002c0 RSI: 0000000020000080 RDI: 0000000000000000 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000771 R14: 00000000004ca736 R15: 00007f8d85c976d4