------------[ cut here ]------------ VFS: brelse: Trying to free free buffer WARNING: CPU: 0 PID: 7189 at fs/buffer.c:1229 __brelse fs/buffer.c:1229 [inline] WARNING: CPU: 0 PID: 7189 at fs/buffer.c:1229 brelse include/linux/buffer_head.h:324 [inline] WARNING: CPU: 0 PID: 7189 at fs/buffer.c:1229 __invalidate_bh_lrus fs/buffer.c:1498 [inline] WARNING: CPU: 0 PID: 7189 at fs/buffer.c:1229 invalidate_bh_lru+0x128/0x200 fs/buffer.c:1511 Modules linked in: CPU: 0 UID: 0 PID: 7189 Comm: syz.0.137 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: ffff0000cce20010 x26: 0000000000000001 x25: 00000000ffffffff x24: ffff0001b37f3998 x23: 0000000000000000 x22: dfff800000000000 x21: 0000000000000000 x20: ffff0000db683060 x19: ffff80008b842120 x18: 0000000000000008 x17: 0000000000000000 x16: ffff8000832776d4 x15: 0000000000000001 x14: 1fffe000366fc6ea x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000010004 x10: 0000000000ff0100 x9 : e4489fbdb61fdf00 x8 : e4489fbdb61fdf00 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800080007538 x4 : ffff80008fa90460 x3 : ffff80008073e590 x2 : 0000000000000001 x1 : 0000000100010002 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) __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] __skb_try_recv_datagram+0x198/0x584 net/core/datagram.c:266 __unix_dgram_recvmsg+0x2f8/0xea4 net/unix/af_unix.c:2436 unix_dgram_recvmsg+0xd0/0xe8 net/unix/af_unix.c:2538 sock_recvmsg_nosec+0x90/0xec net/socket.c:1033 ____sys_recvmsg+0x58c/0x6e4 net/socket.c:2801 ___sys_recvmsg net/socket.c:2845 [inline] do_recvmmsg+0x3b8/0xb00 net/socket.c:2940 __sys_recvmmsg net/socket.c:3014 [inline] __do_sys_recvmmsg net/socket.c:3037 [inline] __se_sys_recvmmsg net/socket.c:3030 [inline] __arm64_sys_recvmmsg+0x180/0x23c net/socket.c:3030 __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: 62530 hardirqs last enabled at (62529): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (62529): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (62530): [] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline] hardirqs last disabled at (62530): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:575 softirqs last enabled at (61550): [] softirq_handle_end kernel/softirq.c:407 [inline] softirqs last enabled at (61550): [] handle_softirqs+0xb44/0xd34 kernel/softirq.c:589 softirqs last disabled at (61541): [] __do_softirq+0x14/0x20 kernel/softirq.c:595 ---[ end trace 0000000000000000 ]--- vkms_vblank_simulate: vblank timer overrun