------------[ cut here ]------------ VFS: brelse: Trying to free free buffer WARNING: CPU: 1 PID: 24 at fs/buffer.c:1229 __brelse fs/buffer.c:1229 [inline] WARNING: CPU: 1 PID: 24 at fs/buffer.c:1229 brelse include/linux/buffer_head.h:324 [inline] WARNING: CPU: 1 PID: 24 at fs/buffer.c:1229 __invalidate_bh_lrus fs/buffer.c:1498 [inline] WARNING: CPU: 1 PID: 24 at fs/buffer.c:1229 invalidate_bh_lru+0x128/0x200 fs/buffer.c:1511 Modules linked in: CPU: 1 UID: 0 PID: 24 Comm: ksoftirqd/1 Tainted: G W 6.13.0-rc6-syzkaller-g6251d1776bc5 #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __brelse fs/buffer.c:1229 [inline] pc : brelse include/linux/buffer_head.h:324 [inline] pc : __invalidate_bh_lrus fs/buffer.c:1498 [inline] pc : invalidate_bh_lru+0x128/0x200 fs/buffer.c:1511 lr : __brelse fs/buffer.c:1229 [inline] lr : brelse include/linux/buffer_head.h:324 [inline] lr : __invalidate_bh_lrus fs/buffer.c:1498 [inline] lr : invalidate_bh_lru+0x128/0x200 fs/buffer.c:1511 sp : ffff800080017e10 x29: ffff800080017e10 x28: 0000000000000001 x27: ffff0000c1b90010 x26: 0000000000000001 x25: 00000000ffffffff x24: ffff0001b3817998 x23: 0000000000000010 x22: dfff800000000000 x21: 0000000000000000 x20: ffff0000c156d888 x19: ffff80008b842120 x18: 0000000000000008 x17: 0000000000000000 x16: ffff8000832776d4 x15: 0000000000000001 x14: 1fffe00036700eea x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000010104 x10: 0000000000ff0100 x9 : 3334724067107d00 x8 : 3334724067107d00 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800080017538 x4 : ffff80008fa90460 x3 : ffff80008073e590 x2 : 0000000000000001 x1 : 0000000100010102 x0 : 0000000000000000 Call trace: __brelse fs/buffer.c:1229 [inline] (P) brelse include/linux/buffer_head.h:324 [inline] (P) __invalidate_bh_lrus fs/buffer.c:1498 [inline] (P) invalidate_bh_lru+0x128/0x200 fs/buffer.c:1511 (P) csd_do_func kernel/smp.c:134 [inline] __flush_smp_call_function_queue+0x520/0x20b4 kernel/smp.c:540 generic_smp_call_function_single_interrupt+0x18/0x24 kernel/smp.c:457 do_handle_IPI arch/arm64/kernel/smp.c:968 [inline] ipi_handler+0x1d8/0x7d4 arch/arm64/kernel/smp.c:1016 handle_percpu_devid_irq+0x174/0x308 kernel/irq/chip.c:942 generic_handle_irq_desc include/linux/irqdesc.h:173 [inline] handle_irq_desc kernel/irq/irqdesc.c:714 [inline] generic_handle_domain_irq+0x7c/0xc4 kernel/irq/irqdesc.c:770 __gic_handle_irq drivers/irqchip/irq-gic-v3.c:865 [inline] __gic_handle_irq_from_irqson drivers/irqchip/irq-gic-v3.c:916 [inline] gic_handle_irq+0x6c/0x190 drivers/irqchip/irq-gic-v3.c:960 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:891 do_interrupt_handler+0xd4/0x138 arch/arm64/kernel/entry-common.c:310 __el1_irq arch/arm64/kernel/entry-common.c:560 [inline] el1_interrupt+0x34/0x68 arch/arm64/kernel/entry-common.c:575 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:580 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:596 __sanitizer_cov_trace_pc+0x78/0x84 kernel/kcov.c:233 (P) check_preemption_disabled+0x30/0xe4 lib/smp_processor_id.c:16 debug_smp_processor_id+0x20/0x2c lib/smp_processor_id.c:60 rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] rcu_is_watching+0x5c/0x18c kernel/rcu/tree.c:737 rcu_read_unlock include/linux/rcupdate.h:878 [inline] get_mem_cgroup_from_objcg+0x160/0x1cc include/linux/memcontrol.h:503 uncharge_folio+0xf4/0x5a0 mm/memcontrol.c:4673 __mem_cgroup_uncharge+0x128/0x1e0 mm/memcontrol.c:4723 mem_cgroup_uncharge include/linux/memcontrol.h:669 [inline] __folio_put+0x2b0/0x408 mm/swap.c:111 folio_put include/linux/mm.h:1489 [inline] free_page_and_swap_cache+0x110/0x190 mm/swap_state.c:308 __tlb_remove_table arch/arm64/include/asm/tlb.h:16 [inline] __tlb_remove_table_free mm/mmu_gather.c:227 [inline] tlb_remove_table_rcu+0x88/0x194 mm/mmu_gather.c:282 rcu_do_batch kernel/rcu/tree.c:2567 [inline] rcu_core+0x898/0x1b5c kernel/rcu/tree.c:2823 rcu_core_si+0x10/0x1c kernel/rcu/tree.c:2840 handle_softirqs+0x320/0xd34 kernel/softirq.c:561 run_ksoftirqd+0x70/0xc0 kernel/softirq.c:950 smpboot_thread_fn+0x4b0/0x90c kernel/smpboot.c:164 kthread+0x288/0x310 kernel/kthread.c:389 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 irq event stamp: 1296491 hardirqs last enabled at (1296490): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (1296490): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (1296491): [] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline] hardirqs last disabled at (1296491): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:575 softirqs last enabled at (1296424): [] softirq_handle_end kernel/softirq.c:407 [inline] softirqs last enabled at (1296424): [] handle_softirqs+0xb44/0xd34 kernel/softirq.c:589 softirqs last disabled at (1296429): [] run_ksoftirqd+0x70/0xc0 kernel/softirq.c:950 ---[ end trace 0000000000000000 ]--- vkms_vblank_simulate: vblank timer overrun