rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-...!: (1 GPs behind) idle=245/1/0x4000000000000000 softirq=36129/36130 fqs=17 (detected by 1, t=10502 jiffies, g=49977, q=349) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 11095 Comm: syz-executor.0 Not tainted 5.15.120-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 RIP: 0010:separate_irq_context kernel/locking/lockdep.c:4540 [inline] RIP: 0010:__lock_acquire+0xdf8/0x1ff0 kernel/locking/lockdep.c:4995 Code: 48 c1 e8 03 0f b6 04 38 84 c0 0f 85 87 0c 00 00 8b 1b 48 8b 44 24 38 0f b6 04 38 84 c0 0f 85 9b 0c 00 00 48 8b 44 24 20 33 18 c3 00 60 00 00 74 0f c7 44 24 2c 01 00 00 00 49 c7 c7 ff ff ff RSP: 0018:ffffc90000007a60 EFLAGS: 00000002 RAX: ffff888023368b38 RBX: 00000000000f402f RCX: ffff888023368af0 RDX: 0000000000000000 RSI: 0000000000000008 RDI: dffffc0000000000 RBP: ffff888023368ae0 R08: dffffc0000000000 R09: fffffbfff1f7a621 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001 R13: ffff888023368ae8 R14: 1ffff1100466d15c R15: 124e57aca902e35f FS: 00007fe3ed0836c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe3eec22988 CR3: 000000001e6d7000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:269 rcu_read_lock include/linux/rcupdate.h:696 [inline] advance_sched+0x6ce/0x940 net/sched/sch_taprio.c:769 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x598/0xcf0 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194 Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 62 65 a4 f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 87 1a 32 f7 65 8b 05 88 66 dd 75 85 c0 74 3f 48 c7 04 24 0e 36 RSP: 0018:ffffc900055afb60 EFLAGS: 00000206 RAX: 9424b941ddeaf100 RBX: 1ffff92000ab5f70 RCX: ffffffff8162db08 RDX: dffffc0000000000 RSI: ffffffff8a8afd60 RDI: 0000000000000001 RBP: ffffc900055afbf0 R08: dffffc0000000000 R09: fffffbfff1f7a621 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: 1ffff92000ab5f6c R14: ffffc900055afb80 R15: 0000000000000246 clock_was_set+0x67d/0x880 kernel/time/hrtimer.c:970 do_settimeofday64+0x673/0x7e0 kernel/time/timekeeping.c:1328 __do_sys_clock_settime kernel/time/posix-timers.c:1092 [inline] __se_sys_clock_settime kernel/time/posix-timers.c:1080 [inline] __x64_sys_clock_settime+0x232/0x270 kernel/time/posix-timers.c:1080 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fe3eeb01b29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe3ed0830c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3 RAX: ffffffffffffffda RBX: 00007fe3eec20f80 RCX: 00007fe3eeb01b29 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000000 RBP: 00007fe3eeb4d47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fe3eec20f80 R15: 00007ffc0b5c2948 rcu: rcu_preempt kthread starved for 10467 jiffies! g49977 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:27000 pid: 15 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5026 [inline] __schedule+0x12c4/0x4590 kernel/sched/core.c:6372 schedule+0x11b/0x1f0 kernel/sched/core.c:6455 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1884 rcu_gp_fqs_loop+0x2af/0xf70 kernel/rcu/tree.c:1959 rcu_gp_kthread+0xa4/0x360 kernel/rcu/tree.c:2132 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 rcu: Stack dump where RCU GP kthread last ran: NMI backtrace for cpu 1 CPU: 1 PID: 11093 Comm: syz-executor.1 Not tainted 5.15.120-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline] rcu_check_gp_kthread_starvation+0x1d2/0x240 kernel/rcu/tree_stall.h:481 print_other_cpu_stall+0x137a/0x14d0 kernel/rcu/tree_stall.h:586 check_cpu_stall kernel/rcu/tree_stall.h:729 [inline] rcu_pending kernel/rcu/tree.c:3911 [inline] rcu_sched_clock_irq+0x94f/0x1770 kernel/rcu/tree.c:2606 update_process_times+0x196/0x200 kernel/time/timer.c:1788 tick_sched_handle kernel/time/tick-sched.c:237 [inline] tick_sched_timer+0x22d/0x3c0 kernel/time/tick-sched.c:1441 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline] __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline] RIP: 0010:smp_call_function_many_cond+0xa93/0xd90 kernel/smp.c:969 Code: 04 03 84 c0 0f 85 84 00 00 00 45 8b 7d 00 44 89 fe 83 e6 01 31 ff e8 1c b9 0b 00 41 83 e7 01 75 07 e8 b1 b5 0b 00 eb 41 f3 90 <48> b8 00 00 00 00 00 fc ff df 0f b6 04 03 84 c0 75 11 41 f7 45 00 RSP: 0018:ffffc90004c3f980 EFLAGS: 00000246 RAX: ffffffff81744b14 RBX: 1ffff11017348379 RCX: 0000000000040000 RDX: ffffc9000ed4e000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffffc90004c3faa8 R08: ffffffff81744ae4 R09: fffffbfff1f7a655 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: ffff8880b9a41bc8 R14: ffff8880b9b3a740 R15: 0000000000000001 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1135 kill_bdev block/bdev.c:76 [inline] set_blocksize+0x2f3/0x370 block/bdev.c:157 sb_set_blocksize+0x45/0xe0 block/bdev.c:166 ntfs_fill_super+0x17b2/0x2e20 fs/ntfs/super.c:2811 mount_bdev+0x2c9/0x3f0 fs/super.c:1378 legacy_get_tree+0xeb/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1508 do_new_mount+0x28b/0xae0 fs/namespace.c:2994 do_mount fs/namespace.c:3337 [inline] __do_sys_mount fs/namespace.c:3545 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3522 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f1834e5d22a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f18333dcee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f18333dcf80 RCX: 00007f1834e5d22a RDX: 000000002001f6c0 RSI: 000000002001f640 RDI: 00007f18333dcf40 RBP: 000000002001f6c0 R08: 00007f18333dcf80 R09: 0000000000000008 R10: 0000000000000008 R11: 0000000000000202 R12: 000000002001f640 R13: 00007f18333dcf40 R14: 000000000001f635 R15: 0000000020000080