hfs: new node 0 already hashed? ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4969 at fs/hfs/bnode.c:520 hfs_bnode_create+0x40c/0x4c8 fs/hfs/bnode.c:519 Modules linked in: CPU: 0 PID: 4969 Comm: syz.2.113 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 : ffff800021b36c00 x29: ffff800021b36c20 x28: dfff800000000000 x27: dfff800000000000 x26: 0000000000000080 x25: 0000000000000000 x24: ffff0000d28daa88 x23: 1ffff00004366d94 x22: 0000000000000000 x21: ffff0000dc6c8000 x20: 0000000000000000 x19: ffff0000d28daa00 x18: ffff800011a5bd40 x17: 0000000000000000 x16: ffff8000082d3a08 x15: 0000000000000002 x14: 00000000ffffffff x13: 0000000000000001 x12: 0000000000080000 x11: 000000000007ffff x10: ffff800029852000 x9 : 36a64a9b2974fe00 x8 : 36a64a9b2974fe00 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800021b366d8 x4 : ffff800015134e00 x3 : ffff80000a84818c x2 : ffff00019f73dd10 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_btree_inc_height+0xf8/0x870 fs/hfs/brec.c:490 hfs_brec_insert+0x5bc/0x96c fs/hfs/brec.c:148 __hfs_ext_write_extent+0x230/0x488 fs/hfs/extent.c:124 __hfs_ext_cache_extent+0x84/0x750 fs/hfs/extent.c:174 hfs_ext_read_extent fs/hfs/extent.c:202 [inline] hfs_extend_file+0x264/0xf9c fs/hfs/extent.c:401 hfs_get_block+0x2e8/0x9cc fs/hfs/extent.c:353 __block_write_begin_int+0x34c/0x13b8 fs/buffer.c:1991 __block_write_begin fs/buffer.c:2041 [inline] block_write_begin fs/buffer.c:2102 [inline] cont_write_begin+0x548/0x780 fs/buffer.c:2456 hfs_write_begin+0x98/0xe4 fs/hfs/inode.c:58 cont_expand_zero fs/buffer.c:2383 [inline] cont_write_begin+0x268/0x780 fs/buffer.c:2446 hfs_write_begin+0x98/0xe4 fs/hfs/inode.c:58 hfs_file_truncate+0x158/0x7ec fs/hfs/extent.c:494 hfs_inode_setattr+0x3a0/0x5bc fs/hfs/inode.c:659 notify_change+0xb0c/0xdcc fs/attr.c:499 do_truncate+0x178/0x1f0 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+0x98/0x2bc 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: 107726 hardirqs last enabled at (107725): [] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:261 hardirqs last disabled at (107726): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (96102): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (96100): [] 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: 4969 Comm: syz.2.113 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 : hfs_bnode_put+0x358/0x364 fs/hfs/bnode.c:565 lr : hfs_bnode_put+0x358/0x364 fs/hfs/bnode.c:565 sp : ffff800021b36d00 x29: ffff800021b36d00 x28: 0000000000000302 x27: dfff800000000000 x26: ffff700004366db4 x25: ffff800021b36da0 x24: 1fffe0001a51b540 x23: ffff0000dc6c8000 x22: dfff800000000000 x21: 0000000000000000 x20: ffff0000d28daa80 x19: ffff0000d28daa00 x18: ffff800011a5bd40 x17: 0000000000000000 x16: ffff8000082e9244 x15: 0000000000000002 x14: 0000000000000001 x13: 1ffff00002a0a0b1 x12: 0000000000080000 x11: 000000000007ffff x10: ffff800029852000 x9 : ffff800008f86ebc x8 : 0000000000080000 x7 : ffff800011794ea4 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800008f86bc0 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: hfs_bnode_put+0x358/0x364 fs/hfs/bnode.c:565 hfs_btree_inc_height+0x448/0x870 fs/hfs/brec.c:544 hfs_brec_insert+0x5bc/0x96c fs/hfs/brec.c:148 __hfs_ext_write_extent+0x230/0x488 fs/hfs/extent.c:124 __hfs_ext_cache_extent+0x84/0x750 fs/hfs/extent.c:174 hfs_ext_read_extent fs/hfs/extent.c:202 [inline] hfs_extend_file+0x264/0xf9c fs/hfs/extent.c:401 hfs_get_block+0x2e8/0x9cc fs/hfs/extent.c:353 __block_write_begin_int+0x34c/0x13b8 fs/buffer.c:1991 __block_write_begin fs/buffer.c:2041 [inline] block_write_begin fs/buffer.c:2102 [inline] cont_write_begin+0x548/0x780 fs/buffer.c:2456 hfs_write_begin+0x98/0xe4 fs/hfs/inode.c:58 cont_expand_zero fs/buffer.c:2383 [inline] cont_write_begin+0x268/0x780 fs/buffer.c:2446 hfs_write_begin+0x98/0xe4 fs/hfs/inode.c:58 hfs_file_truncate+0x158/0x7ec fs/hfs/extent.c:494 hfs_inode_setattr+0x3a0/0x5bc fs/hfs/inode.c:659 notify_change+0xb0c/0xdcc fs/attr.c:499 do_truncate+0x178/0x1f0 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+0x98/0x2bc 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 97e54759 17ffffce 97d47092 (d4210000) ---[ end trace 0000000000000000 ]---