hfsplus: new node 0 already hashed?
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WARNING: CPU: 1 PID: 5985 at fs/hfsplus/bnode.c:631 hfsplus_bnode_create+0x41c/0x4d8 fs/hfsplus/bnode.c:630
Modules linked in:
CPU: 1 PID: 5985 Comm: syz.5.295 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : hfsplus_bnode_create+0x41c/0x4d8 fs/hfsplus/bnode.c:630
lr : hfsplus_bnode_create+0x41c/0x4d8 fs/hfsplus/bnode.c:630
sp : ffff800020db6d00
x29: ffff800020db6d20 x28: dfff800000000000 x27: dfff800000000000
x26: 0000000000000000 x25: 00000000000000f8 x24: ffff0000d3528088
x23: 0000000000000080 x22: ffff0000d3528000 x21: ffff0000f66aa000
x20: 0000000000000000 x19: 0000000000000000 x18: ffff800011b9bf60
x17: 1fffe00033eaa57e x16: ffff8000082d92bc x15: 0000000040000000
x14: 0000000000000001 x13: 1ffff000041b6d08 x12: 0000000000080000
x11: 000000000002efdc x10: ffff800034400000 x9 : 222ef1e03deca000
x8 : 222ef1e03deca000 x7 : ffff800008257984 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff80000a891370
x2 : ffff00019f552d10 x1 : 0000000100000000 x0 : 0000000000000023
Call trace:
 hfsplus_bnode_create+0x41c/0x4d8 fs/hfsplus/bnode.c:630
 hfsplus_bmap_alloc+0x5b4/0x8e8 fs/hfsplus/btree.c:421
 hfs_btree_inc_height+0x108/0x900 fs/hfsplus/brec.c:475
 hfsplus_brec_insert+0x118/0xac0 fs/hfsplus/brec.c:75
 __hfsplus_ext_write_extent+0x274/0x49c fs/hfsplus/extents.c:107
 __hfsplus_ext_cache_extent+0x84/0xa84 fs/hfsplus/extents.c:186
 hfsplus_ext_read_extent fs/hfsplus/extents.c:218 [inline]
 hfsplus_file_extend+0x3bc/0x13b4 fs/hfsplus/extents.c:459
 hfsplus_get_block+0x324/0x11a0 fs/hfsplus/extents.c:245
 __block_write_begin_int+0x350/0x1388 fs/buffer.c:1991
 __block_write_begin fs/buffer.c:2041 [inline]
 block_write_begin fs/buffer.c:2102 [inline]
 cont_write_begin+0x53c/0x780 fs/buffer.c:2456
 hfsplus_write_begin+0x98/0xe4 fs/hfsplus/inode.c:52
 cont_expand_zero fs/buffer.c:2383 [inline]
 cont_write_begin+0x25c/0x780 fs/buffer.c:2446
 hfsplus_write_begin+0x98/0xe4 fs/hfsplus/inode.c:52
 generic_cont_expand_simple+0x130/0x208 fs/buffer.c:2347
 hfsplus_setattr+0x148/0x258 fs/hfsplus/inode.c:283
 notify_change+0xb0c/0xdcc fs/attr.c:499
 do_truncate+0x188/0x20c fs/open.c:65
 do_sys_ftruncate+0x284/0x31c fs/open.c:193
 __do_sys_ftruncate fs/open.c:204 [inline]
 __se_sys_ftruncate fs/open.c:202 [inline]
 __arm64_sys_ftruncate+0x60/0x74 fs/open.c:202
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
irq event stamp: 9150
hardirqs last  enabled at (9149): [<ffff800008257a18>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1374 [inline]
hardirqs last  enabled at (9149): [<ffff800008257a18>] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:5004
hardirqs last disabled at (9150): [<ffff800011a389f4>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (8480): [<ffff800008030954>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (8478): [<ffff800008030920>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---