loop0: detected capacity change from 0 to 1024 hfsplus: request for non-existent node 67108864 in B*Tree hfsplus: request for non-existent node 67108864 in B*Tree ================================================================== BUG: KASAN: slab-out-of-bounds in hfsplus_bnode_read+0xc0/0x2a0 fs/hfsplus/bnode.c:32 Read of size 8 at addr ffff88801e2ae1c0 by task syz-executor208/5831 CPU: 0 UID: 0 PID: 5831 Comm: syz-executor208 Not tainted 6.16.0-rc2-syzkaller-00318-g739a6c93cc75 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0xd2/0x2b0 mm/kasan/report.c:521 kasan_report+0x118/0x150 mm/kasan/report.c:634 hfsplus_bnode_read+0xc0/0x2a0 fs/hfsplus/bnode.c:32 hfsplus_bnode_dump+0x300/0x450 fs/hfsplus/bnode.c:-1 hfsplus_brec_remove+0x480/0x550 fs/hfsplus/brec.c:229 __hfsplus_delete_attr+0x1d4/0x360 fs/hfsplus/attributes.c:299 hfsplus_delete_all_attrs+0x277/0x410 fs/hfsplus/attributes.c:378 hfsplus_delete_cat+0x92c/0xd20 fs/hfsplus/catalog.c:425 hfsplus_unlink+0x359/0x730 fs/hfsplus/dir.c:385 vfs_unlink+0x394/0x650 fs/namei.c:4595 do_unlinkat+0x350/0x560 fs/namei.c:4659 __do_sys_unlink fs/namei.c:4705 [inline] __se_sys_unlink fs/namei.c:4703 [inline] __x64_sys_unlink+0x47/0x50 fs/namei.c:4703 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f372f6ea8f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffd1d93618 EFLAGS: 00000246 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007f372f6ea8f9 RDX: 00007f372f6e9991 RSI: 0000000000000000 RDI: 0000200000000240 RBP: 00007f372f75e610 R08: 0000000000000604 R09: 0000000000000000 R10: 00007fffd1d934e0 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fffd1d937e8 R14: 0000000000000001 R15: 0000000000000001 Allocated by task 5831: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4328 [inline] __kmalloc_noprof+0x27a/0x4f0 mm/slub.c:4340 kmalloc_noprof include/linux/slab.h:909 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] __hfs_bnode_create+0xf3/0x810 fs/hfsplus/bnode.c:415 hfsplus_bnode_find+0x224/0xd20 fs/hfsplus/bnode.c:492 hfsplus_brec_find+0x15c/0x500 fs/hfsplus/bfind.c:172 __hfsplus_getxattr+0x301/0x7e0 fs/hfsplus/xattr.c:520 hfsplus_getxattr+0x10d/0x180 fs/hfsplus/xattr.c:588 __vfs_getxattr+0x3f4/0x430 fs/xattr.c:423 smk_fetch+0xb4/0x140 security/smack/smack_lsm.c:289 smack_d_instantiate+0x6f5/0x940 security/smack/smack_lsm.c:3606 security_d_instantiate+0x10a/0x200 security/security.c:4079 d_splice_alias+0x6e/0x330 fs/dcache.c:2997 hfsplus_lookup+0x803/0x890 fs/hfsplus/dir.c:124 lookup_one_qstr_excl_raw+0x115/0x280 fs/namei.c:1689 lookup_one_qstr_excl fs/namei.c:1711 [inline] do_unlinkat+0x1d6/0x560 fs/namei.c:4647 __do_sys_unlink fs/namei.c:4705 [inline] __se_sys_unlink fs/namei.c:4703 [inline] __x64_sys_unlink+0x47/0x50 fs/namei.c:4703 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88801e2ae100 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 40 bytes to the right of allocated 152-byte region [ffff88801e2ae100, ffff88801e2ae198) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1e2ae flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88801a4413c0 ffffea0000691800 dead000000000002 raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 1, tgid 1 (swapper/0), ts 2903059082, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1704 prep_new_page mm/page_alloc.c:1712 [inline] get_page_from_freelist+0x21d5/0x22b0 mm/page_alloc.c:3669 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419 alloc_slab_page mm/slub.c:2451 [inline] allocate_slab+0x8a/0x3b0 mm/slub.c:2619 new_slab mm/slub.c:2673 [inline] ___slab_alloc+0xbfc/0x1480 mm/slub.c:3859 __slab_alloc mm/slub.c:3949 [inline] __slab_alloc_node mm/slub.c:4024 [inline] slab_alloc_node mm/slub.c:4185 [inline] __kmalloc_cache_noprof+0x296/0x3d0 mm/slub.c:4354 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] call_usermodehelper_setup+0x8e/0x270 kernel/umh.c:362 kobject_uevent_env+0x65c/0x8c0 lib/kobject_uevent.c:628 device_add+0x557/0xb50 drivers/base/core.c:3673 __add_memory_block drivers/base/memory.c:736 [inline] add_memory_block+0x2ae/0x4f0 drivers/base/memory.c:858 memory_dev_init+0x2f3/0x530 drivers/base/memory.c:1021 driver_init+0x47/0x60 drivers/base/init.c:39 do_basic_setup+0x14/0x90 init/main.c:1368 kernel_init_freeable+0x3d9/0x570 init/main.c:1584 kernel_init+0x1d/0x1d0 init/main.c:1474 page_owner free stack trace missing Memory state around the buggy address: ffff88801e2ae080: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff88801e2ae100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88801e2ae180: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88801e2ae200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88801e2ae280: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================