------------[ cut here ]------------ VFS: brelse: Trying to free free buffer WARNING: CPU: 1 PID: 6886 at fs/buffer.c:1229 __brelse fs/buffer.c:1229 [inline] WARNING: CPU: 1 PID: 6886 at fs/buffer.c:1229 brelse include/linux/buffer_head.h:324 [inline] WARNING: CPU: 1 PID: 6886 at fs/buffer.c:1229 __invalidate_bh_lrus fs/buffer.c:1498 [inline] WARNING: CPU: 1 PID: 6886 at fs/buffer.c:1229 invalidate_bh_lru+0x128/0x200 fs/buffer.c:1511 Modules linked in: CPU: 1 UID: 0 PID: 6886 Comm: udevd 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: ffff0000d434dad0 x26: 0000000000000001 x25: 00000000ffffffff x24: ffff0001b3817998 x23: 0000000000000008 x22: dfff800000000000 x21: 0000000000000000 x20: ffff0000df616ee0 x19: ffff80008b842120 x18: 0000000000000008 x17: 0000000000000000 x16: ffff80008b60619c x15: ffff700011f43bc0 x14: 1ffff00011f43bc0 x13: 0000000000000004 x12: ffffffffffffffff x11: 0000000000010004 x10: 0000000000ff0100 x9 : 79f32259b88fac00 x8 : 79f32259b88fac00 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800080017538 x4 : ffff80008fa90460 x3 : ffff8000804a0b64 x2 : 0000000000000000 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 rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] (P) rcu_is_watching+0x7c/0x18c kernel/rcu/tree.c:737 (P) trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0xdc/0x9e4 kernel/locking/lockdep.c:5860 rcu_lock_release+0x2c/0x38 include/linux/rcupdate.h:347 rcu_read_unlock include/linux/rcupdate.h:880 [inline] dput+0x16c/0x290 fs/dcache.c:862 __traverse_mounts+0x2bc/0x4b4 fs/namei.c:1482 traverse_mounts fs/namei.c:1527 [inline] handle_mounts fs/namei.c:1630 [inline] step_into+0x4a4/0xce0 fs/namei.c:1950 walk_component fs/namei.c:2118 [inline] link_path_walk+0x5fc/0xc44 fs/namei.c:2477 path_openat+0x1d0/0x2b14 fs/namei.c:3983 do_filp_open+0x1e8/0x404 fs/namei.c:4014 do_sys_openat2+0x124/0x1b8 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1428 __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: 572074 hardirqs last enabled at (572073): [<ffff800080d786e0>] seqcount_lockdep_reader_access include/linux/seqlock.h:74 [inline] hardirqs last enabled at (572073): [<ffff800080d786e0>] read_seqbegin+0x80/0x164 include/linux/seqlock.h:813 hardirqs last disabled at (572074): [<ffff80008b6a42b4>] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline] hardirqs last disabled at (572074): [<ffff80008b6a42b4>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:575 softirqs last enabled at (571600): [<ffff800080129934>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (571598): [<ffff800080129900>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]---