option from the mount to silence this warning. ======================================================= hfsplus: new node 0 already hashed? ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4480 at fs/hfsplus/bnode.c:641 hfsplus_bnode_create+0x404/0x4c8 fs/hfsplus/bnode.c:640 Modules linked in: CPU: 1 PID: 4480 Comm: syz-executor.0 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : hfsplus_bnode_create+0x404/0x4c8 fs/hfsplus/bnode.c:640 lr : hfsplus_bnode_create+0x404/0x4c8 fs/hfsplus/bnode.c:640 sp : ffff80001f5f6db0 x29: ffff80001f5f6dc0 x28: 0000000000000000 x27: 00000000000000f8 x26: 0000000000000080 x25: dfff800000000000 x24: 0000000000000000 x23: ffff0000c1408a88 x22: 0000000000000000 x21: ffff0000c5f16000 x20: 0000000000000000 x19: ffff0000c1408a00 x18: 0000000000000002 x17: ffff800016d27000 x16: ffff8000111ceed0 x15: ffff800016807500 x14: ffff0000c124a540 x13: 1ffff0000283206b x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : 2dae421a642acd00 x8 : 2dae421a642acd00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000000 x3 : ffff80000a728ccc x2 : ffff0001a10c3d50 x1 : 0000000100000000 x0 : 0000000000000023 Call trace: hfsplus_bnode_create+0x404/0x4c8 fs/hfsplus/bnode.c:640 hfsplus_bmap_alloc+0x5d0/0x8fc fs/hfsplus/btree.c:420 hfs_bnode_split+0xc8/0xbb8 fs/hfsplus/brec.c:245 hfsplus_brec_insert+0x2f4/0xaa8 fs/hfsplus/brec.c:100 hfsplus_create_cat+0x31c/0xdd4 fs/hfsplus/catalog.c:292 hfsplus_fill_super+0xf8c/0x16dc fs/hfsplus/super.c:573 mount_bdev+0x264/0x358 fs/super.c:1400 hfsplus_mount+0x44/0x58 fs/hfsplus/super.c:654 legacy_get_tree+0xd4/0x16c fs/fs_context.c:611 vfs_get_tree+0x90/0x274 fs/super.c:1530 do_new_mount+0x228/0x810 fs/namespace.c:3034 path_mount+0x5b4/0x1000 fs/namespace.c:3364 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount fs/namespace.c:3562 [inline] __arm64_sys_mount+0x514/0x5e4 fs/namespace.c:3562 __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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 3998 hardirqs last enabled at (3997): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1338 [inline] hardirqs last enabled at (3997): [] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:4803 hardirqs last disabled at (3998): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (3328): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (3328): [] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:604 softirqs last disabled at (3093): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (3093): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (3093): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (3093): [] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659 ---[ end trace 2253b8b83f2f7a9a ]--- hfsplus: new node 0 already hashed? ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4480 at fs/hfsplus/bnode.c:641 hfsplus_bnode_create+0x404/0x4c8 fs/hfsplus/bnode.c:640 Modules linked in: CPU: 1 PID: 4480 Comm: syz-executor.0 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : hfsplus_bnode_create+0x404/0x4c8 fs/hfsplus/bnode.c:640 lr : hfsplus_bnode_create+0x404/0x4c8 fs/hfsplus/bnode.c:640 sp : ffff80001f5f6e10 x29: ffff80001f5f6e20 x28: 0000000000000000 x27: 0000000000000222 x26: 0000000000000080 x25: dfff800000000000 x24: 0000000000000000 x23: ffff0000c1408a88 x22: 0000000000000000 x21: ffff0000c5f16000 x20: 0000000000000000 x19: ffff0000c1408a00 x18: 0000000000000002 x17: 0000000040000000 x16: ffff8000082c0c04 x15: 0000000000000002 x14: 0000000000ff0100 x13: 1ffff0000283206b x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : 2dae421a642acd00 x8 : 2dae421a642acd00 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000000 x3 : 0000000000000010 x2 : 0000000000000006 x1 : 0000000100000000 x0 : 0000000000000023 Call trace: hfsplus_bnode_create+0x404/0x4c8 fs/hfsplus/bnode.c:640 hfsplus_bmap_alloc+0x5d0/0x8fc fs/hfsplus/btree.c:420 hfs_btree_inc_height+0xf8/0x8e0 fs/hfsplus/brec.c:475 hfsplus_brec_insert+0x5c8/0xaa8 fs/hfsplus/brec.c:148 hfsplus_create_cat+0x31c/0xdd4 fs/hfsplus/catalog.c:292 hfsplus_fill_super+0xf8c/0x16dc fs/hfsplus/super.c:573 mount_bdev+0x264/0x358 fs/super.c:1400 hfsplus_mount+0x44/0x58 fs/hfsplus/super.c:654 legacy_get_tree+0xd4/0x16c fs/fs_context.c:611 vfs_get_tree+0x90/0x274 fs/super.c:1530 do_new_mount+0x228/0x810 fs/namespace.c:3034 path_mount+0x5b4/0x1000 fs/namespace.c:3364 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount fs/namespace.c:3562 [inline] __arm64_sys_mount+0x514/0x5e4 fs/namespace.c:3562 __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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 irq event stamp: 4114 hardirqs last enabled at (4113): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1338 [inline] hardirqs last enabled at (4113): [] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:4803 hardirqs last disabled at (4114): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (4108): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (4108): [] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:604 softirqs last disabled at (4101): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (4101): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (4101): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (4101): [] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659 ---[ end trace 2253b8b83f2f7a9b ]--- ------------[ cut here ]------------ kernel BUG at fs/hfsplus/bnode.c:688! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 4480 Comm: syz-executor.0 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : hfsplus_bnode_put+0x590/0x59c fs/hfsplus/bnode.c:688 lr : hfsplus_bnode_put+0x590/0x59c fs/hfsplus/bnode.c:688 sp : ffff80001f5f6f00 x29: ffff80001f5f6f00 x28: ffff0000cd44a800 x27: dfff800000000000 x26: ffff700003ebedf4 x25: ffff80001f5f6fa0 x24: ffff0000c5f16000 x23: dfff800000000000 x22: 1fffe00018281140 x21: 0000000000000000 x20: ffff0000c1408a80 x19: ffff0000c1408a00 x18: 0000000000000002 x17: 0000000040000000 x16: ffff8000082d6484 x15: 0000000000000002 x14: 0000000000000001 x13: 1ffff0000283206b x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000000000000 x9 : ffff800008eb27fc x8 : ffff0000c1249b40 x7 : ffff80000a8ec5e4 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800008eb22c8 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: hfsplus_bnode_put+0x590/0x59c fs/hfsplus/bnode.c:688 hfs_btree_inc_height+0x48c/0x8e0 fs/hfsplus/brec.c:530 hfsplus_brec_insert+0x5c8/0xaa8 fs/hfsplus/brec.c:148 hfsplus_create_cat+0x31c/0xdd4 fs/hfsplus/catalog.c:292 hfsplus_fill_super+0xf8c/0x16dc fs/hfsplus/super.c:573 mount_bdev+0x264/0x358 fs/super.c:1400 hfsplus_mount+0x44/0x58 fs/hfsplus/super.c:654 legacy_get_tree+0xd4/0x16c fs/fs_context.c:611 vfs_get_tree+0x90/0x274 fs/super.c:1530 do_new_mount+0x228/0x810 fs/namespace.c:3034 path_mount+0x5b4/0x1000 fs/namespace.c:3364 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount fs/namespace.c:3562 [inline] __arm64_sys_mount+0x514/0x5e4 fs/namespace.c:3562 __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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Code: aa1403e0 97e629f0 17ffff74 97d71b08 (d4210000) ---[ end trace 2253b8b83f2f7a9c ]---