hfs: new node 0 already hashed? ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4161 at fs/hfs/bnode.c:438 hfs_bnode_create+0x404/0x4c8 fs/hfs/bnode.c:437 Modules linked in: CPU: 1 PID: 4161 Comm: syz.0.9 Not tainted 5.15.186-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : hfs_bnode_create+0x404/0x4c8 fs/hfs/bnode.c:437 lr : hfs_bnode_create+0x404/0x4c8 fs/hfs/bnode.c:437 sp : ffff80001f6b6ad0 x29: ffff80001f6b6ae0 x28: 000000000000008c x27: ffff0000df098000 x26: 0000000000000000 x25: dfff800000000000 x24: 0000000000000080 x23: ffff0000df09808c x22: 0000000000000000 x21: ffff0000dcf42000 x20: 0000000000000000 x19: ffff0000cf3ebe00 x18: 0000000000000002 x17: ffff800016d15000 x16: ffff8000111cf35c x15: ffff8000167f5500 x14: ffff0000d3e52540 x13: 1ffff0000283006b x12: 0000000000080000 x11: 000000000007ffff x10: ffff80002097a000 x9 : 913c1587a6f36200 x8 : 913c1587a6f36200 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000000 x3 : ffff80000a7343e4 x2 : ffff0001a10d4d50 x1 : 0000000100000000 x0 : 000000000000001f Call trace: hfs_bnode_create+0x404/0x4c8 fs/hfs/bnode.c:437 hfs_bmap_alloc+0x540/0x604 fs/hfs/btree.c:288 hfs_btree_inc_height+0xf8/0x870 fs/hfs/brec.c:471 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+0x27c/0x1000 fs/hfs/extent.c:401 hfs_get_block+0x2e8/0x9ec fs/hfs/extent.c:353 __block_write_begin_int+0x3e4/0x1588 fs/buffer.c:2012 __block_write_begin fs/buffer.c:2062 [inline] block_write_begin fs/buffer.c:2122 [inline] cont_write_begin+0x4e4/0x6dc fs/buffer.c:2471 hfs_write_begin+0xa8/0xf8 fs/hfs/inode.c:59 pagecache_write_begin+0xa0/0xc0 mm/filemap.c:3608 cont_expand_zero fs/buffer.c:2398 [inline] cont_write_begin+0x220/0x6dc fs/buffer.c:2461 hfs_write_begin+0xa8/0xf8 fs/hfs/inode.c:59 pagecache_write_begin+0xa0/0xc0 mm/filemap.c:3608 hfs_file_truncate+0x15c/0x7f0 fs/hfs/extent.c:494 hfs_inode_setattr+0x3a0/0x5bc fs/hfs/inode.c:657 notify_change+0xa08/0xcd8 fs/attr.c:505 do_truncate+0x178/0x1f0 fs/open.c:65 vfs_truncate+0x23c/0x2b0 fs/open.c:111 do_sys_truncate+0xe8/0x1b0 fs/open.c:134 __do_sys_truncate fs/open.c:146 [inline] __se_sys_truncate fs/open.c:144 [inline] __arm64_sys_truncate+0x5c/0x70 fs/open.c:144 __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: 32894 hardirqs last enabled at (32893): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1338 [inline] hardirqs last enabled at (32893): [] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:4784 hardirqs last disabled at (32894): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396 softirqs last enabled at (31040): [] softirq_handle_end kernel/softirq.c:419 [inline] softirqs last enabled at (31040): [] handle_softirqs+0xa4c/0xbf0 kernel/softirq.c:604 softirqs last disabled at (31015): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (31015): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (31015): [] invoke_softirq kernel/softirq.c:457 [inline] softirqs last disabled at (31015): [] __irq_exit_rcu+0x240/0x440 kernel/softirq.c:659 ---[ end trace 3a64c397aa3a5b46 ]--- ------------[ cut here ]------------ kernel BUG at fs/hfs/bnode.c:485! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 4161 Comm: syz.0.9 Tainted: G W 5.15.186-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : hfs_bnode_put+0x418/0x424 fs/hfs/bnode.c:485 lr : hfs_bnode_put+0x418/0x424 fs/hfs/bnode.c:485 sp : ffff80001f6b6bc0 x29: ffff80001f6b6bc0 x28: 0000000000000302 x27: dfff800000000000 x26: ffff700003ed6d8c x25: ffff80001f6b6c60 x24: ffff0000dcf42000 x23: dfff800000000000 x22: 1fffe00019e7d7c0 x21: 0000000000000000 x20: ffff0000cf3ebe80 x19: ffff0000cf3ebe00 x18: 0000000000000002 x17: ffff800016d15000 x16: ffff8000082d6448 x15: ffff8000167f5500 x14: 1fffe00019e7d7c3 x13: 1ffff0000283006b x12: 0000000000080000 x11: 000000000007ffff x10: ffff80002097a000 x9 : ffff800008ed669c x8 : 0000000000080000 x7 : ffff80000a8f7b64 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800008ed62e0 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: hfs_bnode_put+0x418/0x424 fs/hfs/bnode.c:485 hfs_btree_inc_height+0x448/0x870 fs/hfs/brec.c:525 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+0x27c/0x1000 fs/hfs/extent.c:401 hfs_get_block+0x2e8/0x9ec fs/hfs/extent.c:353 __block_write_begin_int+0x3e4/0x1588 fs/buffer.c:2012 __block_write_begin fs/buffer.c:2062 [inline] block_write_begin fs/buffer.c:2122 [inline] cont_write_begin+0x4e4/0x6dc fs/buffer.c:2471 hfs_write_begin+0xa8/0xf8 fs/hfs/inode.c:59 pagecache_write_begin+0xa0/0xc0 mm/filemap.c:3608 cont_expand_zero fs/buffer.c:2398 [inline] cont_write_begin+0x220/0x6dc fs/buffer.c:2461 hfs_write_begin+0xa8/0xf8 fs/hfs/inode.c:59 pagecache_write_begin+0xa0/0xc0 mm/filemap.c:3608 hfs_file_truncate+0x15c/0x7f0 fs/hfs/extent.c:494 hfs_inode_setattr+0x3a0/0x5bc fs/hfs/inode.c:657 notify_change+0xa08/0xcd8 fs/attr.c:505 do_truncate+0x178/0x1f0 fs/open.c:65 vfs_truncate+0x23c/0x2b0 fs/open.c:111 do_sys_truncate+0xe8/0x1b0 fs/open.c:134 __do_sys_truncate fs/open.c:146 [inline] __se_sys_truncate fs/open.c:144 [inline] __arm64_sys_truncate+0x5c/0x70 fs/open.c:144 __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 97e5dea8 17ffffa4 97d68ef1 (d4210000) ---[ end trace 3a64c397aa3a5b47 ]---