hfs: new node 0 already hashed? ------------[ cut here ]------------ WARNING: CPU: 0 PID: 41 at fs/hfs/bnode.c:520 hfs_bnode_create+0x384/0x430 fs/hfs/bnode.c:519 Modules linked in: CPU: 0 UID: 0 PID: 41 Comm: kworker/u8:2 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Workqueue: writeback wb_workfn (flush-7:0) 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 : ffff8000990b6c10 x29: ffff8000990b6c20 x28: 0000000000000000 x27: dfff800000000000 x26: 0000000000000080 x25: dfff800000000000 x24: 0000000000000000 x23: ffff0000fc70b08c x22: 0000000000000000 x21: 0000000000000000 x20: ffff0000f8df4000 x19: ffff0000d1be3d00 x18: 00000000ffffffff x17: ffff800093305000 x16: ffff800082de9540 x15: 0000000000000001 x14: 1ffff00013216cfc x13: 0000000000000000 x12: 0000000000000000 x11: ffff700013216cfd x10: 0000000000ff0100 x9 : 890a6d9df4983300 x8 : 890a6d9df4983300 x7 : ffff8000805638d4 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000807d5158 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:490 hfs_brec_insert+0x640/0x9ec 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+0xc4/0x794 fs/hfs/inode.c:440 write_inode fs/fs-writeback.c:1564 [inline] __writeback_single_inode+0x5ac/0x13e8 fs/fs-writeback.c:1784 writeback_sb_inodes+0x55c/0xe40 fs/fs-writeback.c:2015 wb_writeback+0x3cc/0xd70 fs/fs-writeback.c:2195 wb_do_writeback fs/fs-writeback.c:2342 [inline] wb_workfn+0x338/0xdc0 fs/fs-writeback.c:2382 process_one_work+0x7e8/0x155c kernel/workqueue.c:3263 process_scheduled_works kernel/workqueue.c:3346 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3427 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 267516 hardirqs last enabled at (267515): [] irqentry_exit+0xd8/0x108 kernel/entry/common.c:214 hardirqs last disabled at (267516): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:434 softirqs last enabled at (267440): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (267440): [] nsim_dev_trap_report drivers/net/netdevsim/dev.c:835 [inline] softirqs last enabled at (267440): [] nsim_dev_trap_report_work+0x67c/0x9fc drivers/net/netdevsim/dev.c:866 softirqs last disabled at (267438): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (267438): [] nsim_dev_trap_report drivers/net/netdevsim/dev.c:831 [inline] softirqs last disabled at (267438): [] nsim_dev_trap_report_work+0x5f4/0x9fc drivers/net/netdevsim/dev.c:866 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ kernel BUG at fs/hfs/bnode.c:565! Internal error: Oops - BUG: 00000000f2000800 [#1] SMP Modules linked in: CPU: 0 UID: 0 PID: 41 Comm: kworker/u8:2 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Workqueue: writeback wb_workfn (flush-7:0) pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : hfs_bnode_put+0x43c/0x5f0 fs/hfs/bnode.c:565 lr : hfs_bnode_put+0x43c/0x5f0 fs/hfs/bnode.c:565 sp : ffff8000990b6cf0 x29: ffff8000990b6d00 x28: 0000000000000302 x27: dfff800000000000 x26: ffff700013216db4 x25: 1fffe0001a37c7a0 x24: ffff0000f8df4000 x23: dfff800000000000 x22: 1fffe0001a37c7b0 x21: 0000000000000000 x20: ffff0000d1be3d80 x19: ffff0000d1be3d00 x18: 00000000ffffffff x17: ffff800093305000 x16: ffff800080536230 x15: 0000000000000001 x14: 1fffe0001a37c7b0 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001a37c7b1 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000c259dc40 x7 : ffff80008ad60080 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800081320114 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: hfs_bnode_put+0x43c/0x5f0 fs/hfs/bnode.c:565 (P) hfs_btree_inc_height+0x448/0x870 fs/hfs/brec.c:544 hfs_brec_insert+0x640/0x9ec 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+0xc4/0x794 fs/hfs/inode.c:440 write_inode fs/fs-writeback.c:1564 [inline] __writeback_single_inode+0x5ac/0x13e8 fs/fs-writeback.c:1784 writeback_sb_inodes+0x55c/0xe40 fs/fs-writeback.c:2015 wb_writeback+0x3cc/0xd70 fs/fs-writeback.c:2195 wb_do_writeback fs/fs-writeback.c:2342 [inline] wb_workfn+0x338/0xdc0 fs/fs-writeback.c:2382 process_one_work+0x7e8/0x155c kernel/workqueue.c:3263 process_scheduled_works kernel/workqueue.c:3346 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3427 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 Code: d2d00017 f2fbfff7 17ffff09 97d0543c (d4210000) ---[ end trace 0000000000000000 ]---