hfs: new node 0 already hashed? ------------[ cut here ]------------ WARNING: CPU: 1 PID: 15 at fs/hfs/bnode.c:520 hfs_bnode_create+0x384/0x430 fs/hfs/bnode.c:519 Modules linked in: CPU: 1 UID: 0 PID: 15 Comm: kworker/u8:1 Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Workqueue: writeback wb_workfn (flush-7:1) pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : hfs_bnode_create+0x384/0x430 fs/hfs/bnode.c:519 lr : hfs_bnode_create+0x384/0x430 fs/hfs/bnode.c:519 sp : ffff800097c46c10 x29: ffff800097c46c20 x28: 0000000000000000 x27: dfff800000000000 x26: 0000000000000080 x25: dfff800000000000 x24: 0000000000000000 x23: ffff0000df00408c x22: 0000000000000000 x21: 0000000000000000 x20: ffff0000dcee2000 x19: ffff0000caddd400 x18: 00000000ffffffff x17: ffff800093507000 x16: ffff80008b007230 x15: 0000000000000001 x14: 1ffff00012f88cf8 x13: 0000000000000000 x12: 0000000000000000 x11: ffff700012f88cf9 x10: 0000000000ff0100 x9 : 1b1c086b7a861a00 x8 : 1b1c086b7a861a00 x7 : ffff800080563af4 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000807de560 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 000000000000001f Call trace: hfs_bnode_create+0x384/0x430 fs/hfs/bnode.c:519 (P) hfs_bmap_alloc+0x5b0/0x688 fs/hfs/btree.c:326 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_write_extent+0x144/0x1bc fs/hfs/extent.c:144 hfs_write_inode+0xbc/0x704 fs/hfs/inode.c:429 write_inode fs/fs-writeback.c:1525 [inline] __writeback_single_inode+0x5ac/0x13e8 fs/fs-writeback.c:1745 writeback_sb_inodes+0x55c/0xe40 fs/fs-writeback.c:1976 wb_writeback+0x3cc/0xd70 fs/fs-writeback.c:2156 wb_do_writeback fs/fs-writeback.c:2303 [inline] wb_workfn+0x338/0xdc0 fs/fs-writeback.c:2343 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 603162 hardirqs last enabled at (603161): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:86 [inline] hardirqs last enabled at (603161): [] exit_to_kernel_mode+0xc0/0xf0 arch/arm64/kernel/entry-common.c:96 hardirqs last disabled at (603162): [] el1_brk64+0x1c/0x48 arch/arm64/kernel/entry-common.c:574 softirqs last enabled at (603028): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (603028): [] batadv_nc_purge_paths+0x2f4/0x37c net/batman-adv/network-coding.c:471 softirqs last disabled at (603026): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (603026): [] batadv_nc_purge_paths+0xd0/0x37c net/batman-adv/network-coding.c:442 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ kernel BUG at fs/hfs/bnode.c:565! Internal error: Oops - BUG: 00000000f2000800 [#1] SMP Modules linked in: CPU: 1 UID: 0 PID: 15 Comm: kworker/u8:1 Tainted: G W 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Workqueue: writeback wb_workfn (flush-7:1) pstate: 83400005 (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 : ffff800097c46d00 x29: ffff800097c46d00 x28: 0000000000000302 x27: dfff800000000000 x26: ffff700012f88db4 x25: ffff800097c46da0 x24: 1fffe000195bba80 x23: ffff0000dcee2000 x22: dfff800000000000 x21: 0000000000000000 x20: ffff0000caddd480 x19: ffff0000caddd400 x18: 00000000ffffffff x17: ffff800093507000 x16: ffff800080535980 x15: 0000000000000001 x14: 1fffe000195bba90 x13: 0000000000000000 x12: 0000000000000000 x11: ffff6000195bba91 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000c1a03d00 x7 : ffff80008af730c0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800081304d18 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: hfs_bnode_put+0x358/0x364 fs/hfs/bnode.c:565 (P) 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_write_extent+0x144/0x1bc fs/hfs/extent.c:144 hfs_write_inode+0xbc/0x704 fs/hfs/inode.c:429 write_inode fs/fs-writeback.c:1525 [inline] __writeback_single_inode+0x5ac/0x13e8 fs/fs-writeback.c:1745 writeback_sb_inodes+0x55c/0xe40 fs/fs-writeback.c:1976 wb_writeback+0x3cc/0xd70 fs/fs-writeback.c:2156 wb_do_writeback fs/fs-writeback.c:2303 [inline] wb_workfn+0x338/0xdc0 fs/fs-writeback.c:2343 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 Code: aa1403e0 97e5a3bb 17ffffce 97d0a953 (d4210000) ---[ end trace 0000000000000000 ]---