------------[ cut here ]------------
VFS: brelse: Trying to free free buffer
WARNING: CPU: 1 PID: 4092 at fs/buffer.c:1148 __brelse fs/buffer.c:1148 [inline]
WARNING: CPU: 1 PID: 4092 at fs/buffer.c:1148 brelse include/linux/buffer_head.h:325 [inline]
WARNING: CPU: 1 PID: 4092 at fs/buffer.c:1148 __invalidate_bh_lrus fs/buffer.c:1394 [inline]
WARNING: CPU: 1 PID: 4092 at fs/buffer.c:1148 invalidate_bh_lru+0x130/0x228 fs/buffer.c:1407
Modules linked in:
CPU: 1 PID: 4092 Comm: syz-executor.0 Not tainted 5.15.106-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __brelse fs/buffer.c:1148 [inline]
pc : brelse include/linux/buffer_head.h:325 [inline]
pc : __invalidate_bh_lrus fs/buffer.c:1394 [inline]
pc : invalidate_bh_lru+0x130/0x228 fs/buffer.c:1407
lr : __brelse fs/buffer.c:1148 [inline]
lr : brelse include/linux/buffer_head.h:325 [inline]
lr : __invalidate_bh_lrus fs/buffer.c:1394 [inline]
lr : invalidate_bh_lru+0x130/0x228 fs/buffer.c:1407
sp : ffff800008017df0
x29: ffff800008017df0 x28: ffff0000c7219ac0 x27: ffff800008a65fc8
x26: dfff800000000000 x25: 0000000000000001 x24: ffff0001b482c6d8
x23: 0000000000000058 x22: dfff800000000000 x21: 0000000000000000
x20: ffff0000dc6937a0 x19: ffff800011b4c0e0 x18: 0000000000010003
x17: ff80800008333ebc x16: ffff800011940934 x15: ffff800008333ebc
x14: 00000000ffffffff x13: ffffffffffffffff x12: 0000000000000000
x11: ff8080000832b964 x10: 0000000000010002 x9 : fa6c0b458c848500
x8 : fa6c0b458c848500 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800008017558 x4 : ffff8000149af940 x3 : ffff80000854a334
x2 : 0000000000000001 x1 : 0000000100010002 x0 : 0000000000000027
Call trace:
 __brelse fs/buffer.c:1148 [inline]
 brelse include/linux/buffer_head.h:325 [inline]
 __invalidate_bh_lrus fs/buffer.c:1394 [inline]
 invalidate_bh_lru+0x130/0x228 fs/buffer.c:1407
 flush_smp_call_function_queue+0x3d0/0x8c4 kernel/smp.c:628
 generic_smp_call_function_single_interrupt+0x18/0x24 kernel/smp.c:544
 do_handle_IPI arch/arm64/kernel/smp.c:902 [inline]
 ipi_handler+0x15c/0x7d4 arch/arm64/kernel/smp.c:948
 handle_percpu_devid_irq+0x29c/0x7fc kernel/irq/chip.c:933
 generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
 handle_irq_desc kernel/irq/irqdesc.c:651 [inline]
 handle_domain_irq+0xec/0x178 kernel/irq/irqdesc.c:706
 gic_handle_irq+0x78/0x1c8 drivers/irqchip/irq-gic-v3.c:757
 call_on_irq_stack+0x2c/0x54 arch/arm64/kernel/entry.S:899
 do_interrupt_handler+0x74/0x94 arch/arm64/kernel/entry-common.c:267
 el1_interrupt+0x30/0x58 arch/arm64/kernel/entry-common.c:442
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:458
 el1h_64_irq+0x78/0x7c arch/arm64/kernel/entry.S:580
 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:122 [inline]
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
 _raw_spin_unlock_irqrestore+0xbc/0x158 kernel/locking/spinlock.c:194
 __debug_check_no_obj_freed lib/debugobjects.c:1009 [inline]
 debug_check_no_obj_freed+0x4f0/0x50c lib/debugobjects.c:1030
 slab_free_hook mm/slub.c:1680 [inline]
 slab_free_freelist_hook+0x9c/0x1ec mm/slub.c:1731
 slab_free mm/slub.c:3499 [inline]
 kmem_cache_free+0xdc/0x3c4 mm/slub.c:3515
 putname fs/namei.c:270 [inline]
 user_path_at_empty+0x148/0x1a4 fs/namei.c:2855
 user_path_at include/linux/namei.h:57 [inline]
 ksys_umount fs/namespace.c:1779 [inline]
 __do_sys_umount fs/namespace.c:1787 [inline]
 __se_sys_umount fs/namespace.c:1785 [inline]
 __arm64_sys_umount+0xf8/0x17c fs/namespace.c:1785
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 2884944
hardirqs last  enabled at (2884943): [<ffff800011a14320>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
hardirqs last  enabled at (2884943): [<ffff800011a14320>] _raw_spin_unlock_irqrestore+0xac/0x158 kernel/locking/spinlock.c:194
hardirqs last disabled at (2884944): [<ffff80001193f010>] enter_el1_irq_or_nmi+0x10/0x1c arch/arm64/kernel/entry-common.c:227
softirqs last  enabled at (2884926): [<ffff800008030068>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31
softirqs last disabled at (2884924): [<ffff800008030034>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18
---[ end trace ee80627ad570f675 ]---
vkms_vblank_simulate: vblank timer overrun