rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-...!: (0 ticks this GP) idle=27b/1/0x4000000000000000 softirq=22586/22586 fqs=0 (detected by 1, t=10505 jiffies, g=35205, q=291) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8313 Comm: syz-executor.5 Not tainted 5.15.130-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:arch_atomic_try_cmpxchg arch/x86/include/asm/atomic.h:202 [inline] RIP: 0010:atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:513 [inline] RIP: 0010:queued_spin_lock include/asm-generic/qspinlock.h:82 [inline] RIP: 0010:do_raw_spin_lock+0x150/0x370 kernel/locking/spinlock_debug.c:115 Code: 00 00 c7 44 24 60 00 00 00 00 4c 89 e7 be 04 00 00 00 e8 f3 cd 65 00 4c 89 f7 be 04 00 00 00 e8 e6 cd 65 00 41 0f b6 44 1d 00 <84> c0 48 89 da 0f 85 89 01 00 00 8b 44 24 60 b9 01 00 00 00 f0 41 RSP: 0018:ffffc90000007be0 EFLAGS: 00000097 RAX: 0000000000000004 RBX: dffffc0000000000 RCX: ffffffff8163f18a RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90000007c40 RBP: ffffc90000007cb0 R08: dffffc0000000000 R09: 0000000000000003 R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff88801bddb2e8 R13: 1ffff92000000f88 R14: ffffc90000007c40 R15: 1ffff110037bb65e FS: 00007feefd4b56c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1c02f4f988 CR3: 000000004225c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: spin_lock include/linux/spinlock.h:363 [inline] advance_sched+0x47/0x940 net/sched/sch_taprio.c:716 __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:lru_cache_add+0x263/0x7e0 mm/swap.c:447 Code: e8 03 80 3c 28 00 74 08 48 89 df e8 67 ce 1d 00 4c 8b 23 48 c7 c7 ff ff ff ff 4c 89 e6 e8 75 31 d4 ff 48 8b 04 24 80 3c 28 00 <74> 08 4c 89 ff e8 43 ce 1d 00 4d 8b 2f 44 89 eb 83 e3 01 31 ff 48 RSP: 0018:ffffc90004d4f840 EFLAGS: 00000246 RAX: 1ffffd40002fe689 RBX: ffffea00017f3440 RCX: ffff888020f23b80 RDX: ffffc90002df1000 RSI: 00fff00000080003 RDI: ffffffffffffffff RBP: dffffc0000000000 R08: ffffffff81abef7b R09: fffff940002fe689 R10: 0000000000000000 R11: dffffc0000000001 R12: 00fff00000080003 R13: ffffea00017f3440 R14: ffffea00017f3440 R15: ffffea00017f3448 shmem_getpage_gfp+0x1b6f/0x3190 mm/shmem.c:1945 shmem_getpage mm/shmem.c:151 [inline] shmem_write_begin+0xce/0x1a0 mm/shmem.c:2477 generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3776 __generic_file_write_iter+0x243/0x4f0 mm/filemap.c:3903 generic_file_write_iter+0xa7/0x1b0 mm/filemap.c:3935 call_write_iter include/linux/fs.h:2103 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0xacf/0xe50 fs/read_write.c:594 ksys_write+0x1a2/0x2c0 fs/read_write.c:647 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: 0033:0x7feefef3282f Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 b9 80 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 0c 81 02 00 48 RSP: 002b:00007feefd4b4e70 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007feefef3282f RDX: 0000000001000000 RSI: 00007feef5095000 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000051a5 R10: 0000000020005282 R11: 0000000000000293 R12: 0000000000000003 R13: 00007feefd4b4f3c R14: 00007feefd4b4f40 R15: 00007feef5095000 rcu: rcu_preempt kthread timer wakeup didn't happen for 10504 jiffies! g35205 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 rcu: Possible timer handling issue on cpu=0 timer-softirq=26270 rcu: rcu_preempt kthread starved for 10505 jiffies! g35205 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 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:I stack:26200 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: Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8313 Comm: syz-executor.5 Not tainted 5.15.130-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:hlock_class kernel/locking/lockdep.c:197 [inline] RIP: 0010:check_wait_context kernel/locking/lockdep.c:4686 [inline] RIP: 0010:__lock_acquire+0x551/0x1ff0 kernel/locking/lockdep.c:4961 Code: 00 00 41 8b 1f 81 e3 ff 1f 00 00 89 d8 c1 e8 06 48 8d 3c c5 00 81 bd 8f be 08 00 00 00 e8 c7 37 67 00 48 0f a3 1d 5f f9 5a 0e <73> 1f 48 8d 04 5b 48 c1 e0 06 48 8d 98 00 e0 8c 8f 48 ba 00 00 00 RSP: 0018:ffffc90000007a60 EFLAGS: 00000057 RAX: 0000000000000001 RBX: 0000000000000a0a RCX: ffffffff81628799 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8fbd8240 RBP: 000000000000000a R08: dffffc0000000000 R09: fffffbfff1f7b049 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000002 R13: ffff888020f24668 R14: 0000000000000002 R15: ffff888020f246e0 FS: 00007feefd4b56c0(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1c02f4f988 CR3: 000000004225c000 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 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:363 [inline] advance_sched+0x47/0x940 net/sched/sch_taprio.c:716 __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:lru_cache_add+0x263/0x7e0 mm/swap.c:447 Code: e8 03 80 3c 28 00 74 08 48 89 df e8 67 ce 1d 00 4c 8b 23 48 c7 c7 ff ff ff ff 4c 89 e6 e8 75 31 d4 ff 48 8b 04 24 80 3c 28 00 <74> 08 4c 89 ff e8 43 ce 1d 00 4d 8b 2f 44 89 eb 83 e3 01 31 ff 48 RSP: 0018:ffffc90004d4f840 EFLAGS: 00000246 RAX: 1ffffd40002fe689 RBX: ffffea00017f3440 RCX: ffff888020f23b80 RDX: ffffc90002df1000 RSI: 00fff00000080003 RDI: ffffffffffffffff RBP: dffffc0000000000 R08: ffffffff81abef7b R09: fffff940002fe689 R10: 0000000000000000 R11: dffffc0000000001 R12: 00fff00000080003 R13: ffffea00017f3440 R14: ffffea00017f3440 R15: ffffea00017f3448 shmem_getpage_gfp+0x1b6f/0x3190 mm/shmem.c:1945 shmem_getpage mm/shmem.c:151 [inline] shmem_write_begin+0xce/0x1a0 mm/shmem.c:2477 generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3776 __generic_file_write_iter+0x243/0x4f0 mm/filemap.c:3903 generic_file_write_iter+0xa7/0x1b0 mm/filemap.c:3935 call_write_iter include/linux/fs.h:2103 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0xacf/0xe50 fs/read_write.c:594 ksys_write+0x1a2/0x2c0 fs/read_write.c:647 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: 0033:0x7feefef3282f Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 b9 80 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 0c 81 02 00 48 RSP: 002b:00007feefd4b4e70 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007feefef3282f RDX: 0000000001000000 RSI: 00007feef5095000 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000051a5 R10: 0000000020005282 R11: 0000000000000293 R12: 0000000000000003 R13: 00007feefd4b4f3c R14: 00007feefd4b4f40 R15: 00007feef5095000