------------[ cut here ]------------ WARNING: CPU: 1 PID: 21 at kernel/rcu/tree_stall.h:970 rcu_check_gp_start_stall+0x600/0xe40 kernel/rcu/tree_stall.h:971 Modules linked in: CPU: 1 PID: 21 Comm: ksoftirqd/1 Not tainted 6.1.112-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : rcu_check_gp_start_stall+0x600/0xe40 kernel/rcu/tree_stall.h:971 lr : instrument_atomic_read_write include/linux/instrumented.h:102 [inline] lr : atomic_xchg include/linux/atomic/atomic-instrumented.h:473 [inline] lr : rcu_check_gp_start_stall+0x5e0/0xe40 kernel/rcu/tree_stall.h:963 sp : ffff80001d1e7aa0 x29: ffff80001d1e7aa0 x28: 1ffff00002b29e40 x27: ffff80001594f000 x26: ffff800015baa000 x25: ffff800015baa000 x24: ffff800015ba9dc0 x23: dfff800000000000 x22: ffff800015ba9d80 x21: ffff80001cbb60c0 x20: 0000000000000000 x19: ffff800015ba9d80 x18: 1fffe0003679f176 x17: 00000000ffff0000 x16: ffff80000831ddf8 x15: 0000000000000000 x14: 1ffff00002b3a0b0 x13: dfff800000000000 x12: ffff700003976c18 x11: 1ffff00003976c18 x10: 0000000000000004 x9 : 0000000000000000 x8 : 0000000000000001 x7 : ffff80000839f9d4 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff80000839feac x2 : 0000000000000001 x1 : 0000000000000004 x0 : 0000000000000001 Call trace: rcu_check_gp_start_stall+0x600/0xe40 kernel/rcu/tree_stall.h:971 rcu_core+0x5a8/0x1c48 kernel/rcu/tree.c:2552 rcu_core_si+0x10/0x1c kernel/rcu/tree.c:2574 handle_softirqs+0x318/0xd58 kernel/softirq.c:571 run_ksoftirqd+0x6c/0x29c kernel/softirq.c:938 smpboot_thread_fn+0x4b0/0x96c kernel/smpboot.c:164 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864 irq event stamp: 317463 hardirqs last enabled at (317462): [] rcu_nocb_unlock_irqrestore kernel/rcu/tree_nocb.h:1525 [inline] hardirqs last enabled at (317462): [] rcu_core+0x530/0x1c48 kernel/rcu/tree.c:2549 hardirqs last disabled at (317463): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (317463): [] _raw_spin_lock_irqsave+0xa4/0xb4 kernel/locking/spinlock.c:162 softirqs last enabled at (295756): [] softirq_handle_end kernel/softirq.c:414 [inline] softirqs last enabled at (295756): [] handle_softirqs+0xb84/0xd58 kernel/softirq.c:599 softirqs last disabled at (295763): [] run_ksoftirqd+0x6c/0x29c kernel/softirq.c:938 ---[ end trace 0000000000000000 ]--- rcu: rcu_preempt: wait state: RCU_GP_IDLE(0) ->state: 0x0 ->rt_priority 0 delta ->gp_start 17358 ->gp_activity 17356 ->gp_req_activity 17356 ->gp_wake_time 17356 ->gp_wake_seq 4437 ->gp_seq 4440 ->gp_seq_needed 4444 ->gp_max 96 ->gp_flags 0x1 rcu: rcu_node 0:1 ->gp_seq 4440 ->gp_seq_needed 4444 ->qsmask 0x0 .... ->n_boosts 0 rcu: cpu 0 ->gp_seq_needed 4444 rcu: cpu 1 ->gp_seq_needed 4444 rcu: RCU callbacks invoked since boot: 112439 rcu_tasks: RTGS_WAIT_CBS(11) since 21373 g:8 i:0/0 k. rcu_tasks_trace: RTGS_WAIT_CBS(11) since 21397 g:8 i:0/0 k. N0 h:0/0/0