hfs: new node 0 already hashed?
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4799 at fs/hfs/bnode.c:520 hfs_bnode_create+0x40c/0x4c8 fs/hfs/bnode.c:519
Modules linked in:
CPU: 0 PID: 4799 Comm: syz.2.89 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 : hfs_bnode_create+0x40c/0x4c8 fs/hfs/bnode.c:519
lr : hfs_bnode_create+0x40c/0x4c8 fs/hfs/bnode.c:519
sp : ffff800020f97180
x29: ffff800020f971a0 x28: dfff800000000000 x27: dfff800000000000
x26: 0000000000000080 x25: 0000000000000000 x24: ffff0000c98e3a88
x23: 1ffff000041f2e44 x22: 0000000000000000 x21: ffff0000c3cfc000
x20: 0000000000000000 x19: ffff0000c98e3a00 x18: ffff800011abbcc0
x17: 1fffe00033ed797e x16: ffff8000082d25ac x15: ffff8000150bd000
x14: 0000000000000100 x13: 1ffff00002a180b1 x12: 0000000000080000
x11: 000000000000550f x10: ffff800028d6e000 x9 : d311de3331b2e100
x8 : d311de3331b2e100 x7 : ffff800008251e80 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff80000a8467ac
x2 : ffff00019f6bcd10 x1 : 0000000100000000 x0 : 000000000000001f
Call trace:
 hfs_bnode_create+0x40c/0x4c8 fs/hfs/bnode.c:519
 hfs_bmap_alloc+0x4f4/0x59c fs/hfs/btree.c:291
 hfs_bnode_split+0xc8/0xbb8 fs/hfsplus/brec.c:245
 hfs_brec_insert+0x2e8/0x96c fs/hfs/brec.c:102
 hfs_cat_create+0x2d8/0x758 fs/hfs/catalog.c:118
 hfs_create+0x6c/0xe0 fs/hfs/dir.c:202
 lookup_open fs/namei.c:3490 [inline]
 open_last_lookups fs/namei.c:3558 [inline]
 path_openat+0x112c/0x2680 fs/namei.c:3788
 do_filp_open+0x174/0x344 fs/namei.c:3818
 do_sys_openat2+0x128/0x3d8 fs/open.c:1318
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_openat fs/open.c:1350 [inline]
 __se_sys_openat fs/open.c:1345 [inline]
 __arm64_sys_openat+0x120/0x154 fs/open.c:1345
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 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: 113548
hardirqs last  enabled at (113547): [<ffff800008251f14>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline]
hardirqs last  enabled at (113547): [<ffff800008251f14>] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:5003
hardirqs last disabled at (113548): [<ffff80001195cc30>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (113472): [<ffff8000080309e0>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (113470): [<ffff8000080309ac>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
kernel BUG at fs/hfs/bnode.c:565!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4799 Comm: syz.2.89 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 : hfs_bnode_put+0x358/0x364 fs/hfs/bnode.c:565
lr : hfs_bnode_put+0x358/0x364 fs/hfs/bnode.c:565
sp : ffff800020f97400
x29: ffff800020f97400 x28: dfff800000000000 x27: ffff0000c98e3a00
x26: ffff0000c98e3a00 x25: ffff800020f97648 x24: 1fffe0001931c740
x23: ffff0000c3cfc000 x22: dfff800000000000 x21: 0000000000000000
x20: ffff0000c98e3a80 x19: ffff0000c98e3a00 x18: ffff800011abbcc0
x17: 1fffe00033ed797e x16: ffff8000082d10fc x15: 0000000000000002
x14: 00000000000000ff x13: 0000000000000000 x12: 0000000000080000
x11: 000000000001fec8 x10: ffff800028d6e000 x9 : ffff800008f858a0
x8 : 000000000001fec9 x7 : 0000000000000000 x6 : 000010000000de25
x5 : ffff0000cdf4c64d x4 : ffff0000e564f688 x3 : ffff800008f855a4
x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 hfs_bnode_put+0x358/0x364 fs/hfs/bnode.c:565
 hfs_brec_insert+0x678/0x96c fs/hfs/brec.c:162
 hfs_cat_create+0x2d8/0x758 fs/hfs/catalog.c:118
 hfs_create+0x6c/0xe0 fs/hfs/dir.c:202
 lookup_open fs/namei.c:3490 [inline]
 open_last_lookups fs/namei.c:3558 [inline]
 path_openat+0x112c/0x2680 fs/namei.c:3788
 do_filp_open+0x174/0x344 fs/namei.c:3818
 do_sys_openat2+0x128/0x3d8 fs/open.c:1318
 do_sys_open fs/open.c:1334 [inline]
 __do_sys_openat fs/open.c:1350 [inline]
 __se_sys_openat fs/open.c:1345 [inline]
 __arm64_sys_openat+0x120/0x154 fs/open.c:1345
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 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
Code: aa1403e0 97e5473c 17ffffce 97d470f9 (d4210000) 
---[ end trace 0000000000000000 ]---