------------[ cut here ]------------ VFS: brelse: Trying to free free buffer WARNING: CPU: 0 PID: 9016 at fs/buffer.c:1229 __brelse fs/buffer.c:1229 [inline] WARNING: CPU: 0 PID: 9016 at fs/buffer.c:1229 brelse include/linux/buffer_head.h:324 [inline] WARNING: CPU: 0 PID: 9016 at fs/buffer.c:1229 __invalidate_bh_lrus fs/buffer.c:1498 [inline] WARNING: CPU: 0 PID: 9016 at fs/buffer.c:1229 invalidate_bh_lru+0x128/0x200 fs/buffer.c:1511 Modules linked in: CPU: 0 UID: 0 PID: 9016 Comm: syz.4.381 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 : ffff800080007e10 x29: ffff800080007e10 x28: 0000000000000001 x27: ffff0000ee390010 x26: 0000000000000001 x25: 00000000ffffffff x24: ffff0001b37f3998 x23: 0000000000000018 x22: dfff800000000000 x21: 0000000000000000 x20: ffff0000f5f7b318 x19: ffff80008b842120 x18: 0000000000000008 x17: 0000000000000000 x16: ffff8000832776d4 x15: 0000000000000001 x14: 1fffe000366fc6ea x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000010003 x10: 0000000000ff0100 x9 : 32c3295920fe8200 x8 : 32c3295920fe8200 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800080007538 x4 : ffff80008fa90460 x3 : ffff80008073e590 x2 : 0000000000000001 x1 : 0000000100010001 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 __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) memcg1_commit_charge+0x13c/0x1bc mm/memcontrol-v1.c:568 (P) mem_cgroup_commit_charge mm/memcontrol.c:2411 [inline] charge_memcg+0xe0/0x148 mm/memcontrol.c:4501 __mem_cgroup_charge+0x38/0xa8 mm/memcontrol.c:4512 mem_cgroup_charge include/linux/memcontrol.h:646 [inline] shmem_alloc_and_add_folio+0x9cc/0x1564 mm/shmem.c:1848 shmem_get_folio_gfp+0x554/0x1790 mm/shmem.c:2358 shmem_fault+0x1d8/0x4a0 mm/shmem.c:2559 __do_fault+0x11c/0x374 mm/memory.c:4907 do_read_fault mm/memory.c:5322 [inline] do_fault mm/memory.c:5456 [inline] do_pte_missing mm/memory.c:3979 [inline] handle_pte_fault mm/memory.c:5801 [inline] __handle_mm_fault+0x2f40/0x5ff0 mm/memory.c:5944 handle_mm_fault+0x29c/0x8b4 mm/memory.c:6112 faultin_page mm/gup.c:1196 [inline] __get_user_pages+0x15e4/0x3134 mm/gup.c:1494 populate_vma_page_range+0x220/0x2f0 mm/gup.c:1932 __mm_populate+0x240/0x3d8 mm/gup.c:2035 mm_populate include/linux/mm.h:3397 [inline] vm_mmap_pgoff+0x284/0x38c mm/util.c:580 ksys_mmap_pgoff+0xd0/0x5c8 mm/mmap.c:546 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 irq event stamp: 13510 hardirqs last enabled at (13509): [] memcg1_commit_charge+0x130/0x1bc mm/memcontrol-v1.c:568 hardirqs last disabled at (13510): [] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline] hardirqs last disabled at (13510): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:575 softirqs last enabled at (11596): [] softirq_handle_end kernel/softirq.c:407 [inline] softirqs last enabled at (11596): [] handle_softirqs+0xb44/0xd34 kernel/softirq.c:589 softirqs last disabled at (11581): [] __do_softirq+0x14/0x20 kernel/softirq.c:595 ---[ end trace 0000000000000000 ]--- vkms_vblank_simulate: vblank timer overrun