el0_svc+0x58/0x128 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 hfs: new node 0 already hashed? ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7076 at fs/hfs/bnode.c:520 hfs_bnode_create+0x40c/0x4c4 fs/hfs/bnode.c:519 Modules linked in: CPU: 0 PID: 7076 Comm: syz.7.497 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : hfs_bnode_create+0x40c/0x4c4 fs/hfs/bnode.c:519 lr : hfs_bnode_create+0x40c/0x4c4 fs/hfs/bnode.c:519 sp : ffff800021357260 x29: ffff800021357280 x28: ffff70000426ae60 x27: dfff800000000000 x26: 0000000000000080 x25: 0000000000000000 x24: ffff0000eefd2c88 x23: dfff800000000000 x22: 0000000000000000 x21: ffff0000e70ba000 x20: 0000000000000000 x19: ffff0000eefd2c00 x18: ffff800011babf60 x17: 1fffe00033e9f77e x16: ffff8000082d9e48 x15: ffff80001523d000 x14: 0000000000000001 x13: 1fffe00033ea1e30 x12: 0000000000ff0100 x11: ff008000083121f4 x10: 0000000000000000 x9 : 88779ce9647cd400 x8 : 88779ce9647cd400 x7 : ffff800008258510 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000006 x1 : 0000000100000000 x0 : 000000000000001f Call trace: hfs_bnode_create+0x40c/0x4c4 fs/hfs/bnode.c:519 hfs_bmap_alloc+0x4fc/0x5ac fs/hfs/btree.c:291 hfs_btree_inc_height+0x108/0x890 fs/hfs/brec.c:490 hfs_brec_insert+0x5c4/0x97c fs/hfs/brec.c:148 __hfs_ext_write_extent+0x22c/0x484 fs/hfs/extent.c:124 __hfs_ext_cache_extent+0x84/0x74c fs/hfs/extent.c:174 hfs_ext_read_extent fs/hfs/extent.c:202 [inline] hfs_extend_file+0x2d0/0x1094 fs/hfs/extent.c:401 hfs_bmap_reserve+0xd4/0x3e0 fs/hfs/btree.c:234 hfs_cat_create+0x1d4/0x7b4 fs/hfs/catalog.c:104 hfs_mkdir+0x6c/0xe0 fs/hfs/dir.c:232 vfs_mkdir+0x314/0x4d4 fs/namei.c:4114 do_mkdirat+0x1b8/0x3ec fs/namei.c:4139 __do_sys_mkdirat fs/namei.c:4154 [inline] __se_sys_mkdirat fs/namei.c:4152 [inline] __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4152 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 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: 3744 hardirqs last enabled at (3743): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1374 [inline] hardirqs last enabled at (3743): [] finish_lock_switch+0xb0/0x1c4 kernel/sched/core.c:5004 hardirqs last disabled at (3744): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (3364): [] softirq_handle_end kernel/softirq.c:439 [inline] softirqs last enabled at (3364): [] handle_softirqs+0xaec/0xc60 kernel/softirq.c:624 softirqs last disabled at (3323): [] __do_softirq+0x14/0x20 kernel/softirq.c:630 ---[ 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: 7076 Comm: syz.7.497 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 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 : ffff800021357360 x29: ffff800021357360 x28: 0000000000000001 x27: dfff800000000000 x26: ffff70000426ae80 x25: ffff800021357400 x24: 1fffe0001ddfa580 x23: ffff0000e70ba000 x22: dfff800000000000 x21: 0000000000000000 x20: ffff0000eefd2c80 x19: ffff0000eefd2c00 x18: ffff800011babf60 x17: 1fffe00033e9f77e x16: ffff800011a529a8 x15: ffff80001523d000 x14: 0000000000000001 x13: 1fffe0001ddfa590 x12: 0000000000ff0100 x11: ff00800008fa2dd0 x10: 0000000000000000 x9 : ffff800008fa2dd0 x8 : ffff0000ce7a9c00 x7 : ffff800008258510 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff800008fa2ad4 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: hfs_bnode_put+0x358/0x364 fs/hfs/bnode.c:565 hfs_btree_inc_height+0x458/0x890 fs/hfs/brec.c:544 hfs_brec_insert+0x5c4/0x97c fs/hfs/brec.c:148 __hfs_ext_write_extent+0x22c/0x484 fs/hfs/extent.c:124 __hfs_ext_cache_extent+0x84/0x74c fs/hfs/extent.c:174 hfs_ext_read_extent fs/hfs/extent.c:202 [inline] hfs_extend_file+0x2d0/0x1094 fs/hfs/extent.c:401 hfs_bmap_reserve+0xd4/0x3e0 fs/hfs/btree.c:234 hfs_cat_create+0x1d4/0x7b4 fs/hfs/catalog.c:104 hfs_mkdir+0x6c/0xe0 fs/hfs/dir.c:232 vfs_mkdir+0x314/0x4d4 fs/namei.c:4114 do_mkdirat+0x1b8/0x3ec fs/namei.c:4139 __do_sys_mkdirat fs/namei.c:4154 [inline] __se_sys_mkdirat fs/namei.c:4152 [inline] __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4152 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 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 97e514e3 17ffffce 97d42546 (d4210000) ---[ end trace 0000000000000000 ]---