------------[ cut here ]------------ VFS: brelse: Trying to free free buffer WARNING: CPU: 1 PID: 7956 at fs/buffer.c:1229 __brelse fs/buffer.c:1229 [inline] WARNING: CPU: 1 PID: 7956 at fs/buffer.c:1229 brelse include/linux/buffer_head.h:324 [inline] WARNING: CPU: 1 PID: 7956 at fs/buffer.c:1229 __invalidate_bh_lrus fs/buffer.c:1498 [inline] WARNING: CPU: 1 PID: 7956 at fs/buffer.c:1229 invalidate_bh_lru+0x128/0x200 fs/buffer.c:1511 Modules linked in: CPU: 1 UID: 0 PID: 7956 Comm: syz-executor 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: ffff0000c9e81e50 x26: 0000000000000001 x25: 00000000ffffffff x24: ffff0001b3817998 x23: 0000000000000008 x22: dfff800000000000 x21: 0000000000000000 x20: ffff0000db052970 x19: ffff80008b842120 x18: 0000000000000008 x17: 0000000000000000 x16: ffff8000832776d4 x15: 0000000000000001 x14: 1fffe00036700eea x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000010003 x10: 0000000000ff0100 x9 : 0d6baa55123dc100 x8 : 0d6baa55123dc100 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800080017538 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 __preempt_count_dec_and_test arch/arm64/include/asm/preempt.h:65 [inline] (P) rcu_is_watching+0xd0/0x18c kernel/rcu/tree.c:738 (P) trace_notifier_run include/trace/events/notifier.h:59 [inline] notifier_call_chain+0x168/0x550 kernel/notifier.c:84 raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:453 call_netdevice_notifiers_info net/core/dev.c:1996 [inline] call_netdevice_notifiers_extack net/core/dev.c:2034 [inline] call_netdevice_notifiers+0x13c/0x1bc net/core/dev.c:2048 register_netdevice+0xb40/0x11a8 net/core/dev.c:10596 register_netdev+0x48/0x64 net/core/dev.c:10738 sit_init_net+0x1cc/0x454 net/ipv6/sit.c:1861 ops_init+0x2c8/0x4fc net/core/net_namespace.c:138 setup_net+0x270/0x8c0 net/core/net_namespace.c:362 copy_net_ns+0x2ac/0x4ac net/core/net_namespace.c:516 create_new_namespaces+0x344/0x614 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x108/0x158 kernel/nsproxy.c:228 ksys_unshare+0x484/0x858 kernel/fork.c:3333 __do_sys_unshare kernel/fork.c:3404 [inline] __se_sys_unshare kernel/fork.c:3402 [inline] __arm64_sys_unshare+0x3c/0x50 kernel/fork.c:3402 __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: 9954 hardirqs last enabled at (9953): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (9953): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (9954): [] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline] hardirqs last disabled at (9954): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:575 softirqs last enabled at (9882): [] inet6_fill_ifla6_attrs+0xf20/0x1e90 net/ipv6/addrconf.c:5847 softirqs last disabled at (9880): [] inet6_fill_ifla6_attrs+0xeec/0x1e90 net/ipv6/addrconf.c:5845 ---[ end trace 0000000000000000 ]---