------------[ cut here ]------------ VFS: brelse: Trying to free free buffer WARNING: CPU: 0 PID: 2257 at fs/buffer.c:1229 __brelse fs/buffer.c:1229 [inline] WARNING: CPU: 0 PID: 2257 at fs/buffer.c:1229 brelse include/linux/buffer_head.h:324 [inline] WARNING: CPU: 0 PID: 2257 at fs/buffer.c:1229 __invalidate_bh_lrus fs/buffer.c:1498 [inline] WARNING: CPU: 0 PID: 2257 at fs/buffer.c:1229 invalidate_bh_lru+0x128/0x200 fs/buffer.c:1511 Modules linked in: CPU: 0 UID: 0 PID: 2257 Comm: kworker/0:2 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 Workqueue: usb_hub_wq hub_event 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 : ffff800080007600 x29: ffff800080007600 x28: 0000000000000001 x27: ffff0000ccb29e50 x26: 0000000000000001 x25: 00000000ffffffff x24: ffff0001b37f3998 x23: 0000000000000008 x22: dfff800000000000 x21: 0000000000000000 x20: ffff0000db637970 x19: ffff80008b842120 x18: 0000000000000008 x17: 0000000000000000 x16: ffff8000832776d4 x15: 0000000000000001 x14: 1fffe000366fc6ea x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000010105 x10: 0000000000ff0100 x9 : 87be4ffce7ada300 x8 : 87be4ffce7ada300 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800080006d38 x4 : ffff80008fa90460 x3 : ffff80008073e590 x2 : 0000000000000001 x1 : 0000000000010103 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 do_interrupt_handler+0xe0/0x138 arch/arm64/kernel/entry-common.c:312 __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 __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] (P) arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] (P) __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] (P) _raw_spin_unlock_irqrestore+0x44/0x98 kernel/locking/spinlock.c:194 (P) dummy_timer+0x33dc/0x3514 __run_hrtimer kernel/time/hrtimer.c:1739 [inline] __hrtimer_run_queues+0x47c/0xca4 kernel/time/hrtimer.c:1803 hrtimer_run_softirq+0x158/0x21c kernel/time/hrtimer.c:1820 handle_softirqs+0x320/0xd34 kernel/softirq.c:561 __do_softirq+0x14/0x20 kernel/softirq.c:595 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:891 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:86 invoke_softirq kernel/softirq.c:442 [inline] __irq_exit_rcu+0x1d8/0x544 kernel/softirq.c:662 irq_exit_rcu+0x14/0x84 kernel/softirq.c:678 __el1_irq arch/arm64/kernel/entry-common.c:561 [inline] el1_interrupt+0x38/0x68 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 __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] (P) arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] (P) __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] (P) _raw_spin_unlock_irqrestore+0x44/0x98 kernel/locking/spinlock.c:194 (P) spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] dummy_urb_enqueue+0x26c/0x6cc drivers/usb/gadget/udc/dummy_hcd.c:1314 usb_hcd_submit_urb+0x32c/0x1b28 drivers/usb/core/hcd.c:1533 usb_submit_urb+0xdc4/0x148c drivers/usb/core/urb.c:581 usb_start_wait_urb+0xec/0x414 drivers/usb/core/message.c:59 usb_internal_control_msg drivers/usb/core/message.c:103 [inline] usb_control_msg+0x228/0x3f8 drivers/usb/core/message.c:154 get_bMaxPacketSize0 drivers/usb/core/hub.c:4805 [inline] hub_port_init+0x93c/0x1fc0 drivers/usb/core/hub.c:5001 hub_port_connect drivers/usb/core/hub.c:5450 [inline] hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] port_event drivers/usb/core/hub.c:5821 [inline] hub_event+0x2114/0x4280 drivers/usb/core/hub.c:5903 process_one_work+0x7a8/0x15cc kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x97c/0xeec kernel/workqueue.c:3391 kthread+0x288/0x310 kernel/kthread.c:389 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 irq event stamp: 254379 hardirqs last enabled at (254378): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (254378): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (254379): [] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline] hardirqs last disabled at (254379): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:575 softirqs last enabled at (254330): [] softirq_handle_end kernel/softirq.c:407 [inline] softirqs last enabled at (254330): [] handle_softirqs+0xb44/0xd34 kernel/softirq.c:589 softirqs last disabled at (254351): [] __do_softirq+0x14/0x20 kernel/softirq.c:595 ---[ end trace 0000000000000000 ]---