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hfsplus: request for non-existent node 256 in B*Tree
hfsplus: request for non-existent node 256 in B*Tree
==================================================================
BUG: KASAN: slab-out-of-bounds in hfsplus_bnode_read+0x22a/0x240 fs/hfsplus/bnode.c:32
Read of size 8 at addr ffff88801e1e0dc0 by task syz-executor.0/5482

CPU: 2 PID: 5482 Comm: syz-executor.0 Not tainted 6.10.0-rc1-syzkaller-g4a4be1ad3a6e #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:488
 kasan_report+0xd9/0x110 mm/kasan/report.c:601
 hfsplus_bnode_read+0x22a/0x240 fs/hfsplus/bnode.c:32
 hfsplus_bnode_read_u16 fs/hfsplus/bnode.c:45 [inline]
 hfsplus_bnode_dump+0x2a2/0x3e0 fs/hfsplus/bnode.c:321
 hfsplus_brec_remove+0x3e2/0x4f0 fs/hfsplus/brec.c:229
 __hfsplus_delete_attr+0x2a2/0x3b0 fs/hfsplus/attributes.c:299
 hfsplus_delete_all_attrs+0x271/0x330 fs/hfsplus/attributes.c:378
 hfsplus_delete_cat+0x844/0xdd0 fs/hfsplus/catalog.c:425
 hfsplus_unlink+0x213/0x7f0 fs/hfsplus/dir.c:385
 vfs_unlink+0x2fb/0x9b0 fs/namei.c:4343
 do_unlinkat+0x5c0/0x750 fs/namei.c:4407
 __do_sys_unlink fs/namei.c:4455 [inline]
 __se_sys_unlink fs/namei.c:4453 [inline]
 __x64_sys_unlink+0xc7/0x110 fs/namei.c:4453
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4c81a7dd69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4c827eb0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007f4c81babf80 RCX: 00007f4c81a7dd69
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000
RBP: 00007f4c81aca49e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f4c81babf80 R15: 00007ffe96de6b58
 </TASK>

Allocated by task 5482:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slub.c:4121 [inline]
 __kmalloc_noprof+0x1ec/0x410 mm/slub.c:4134
 kmalloc_noprof include/linux/slab.h:664 [inline]
 kzalloc_noprof include/linux/slab.h:778 [inline]
 __hfs_bnode_create+0x108/0x870 fs/hfsplus/bnode.c:409
 hfsplus_bnode_find+0x2c8/0xcb0 fs/hfsplus/bnode.c:486
 hfsplus_brec_find+0x2b9/0x520 fs/hfsplus/bfind.c:183
 hfsplus_find_attr fs/hfsplus/attributes.c:160 [inline]
 hfsplus_delete_all_attrs+0x24a/0x330 fs/hfsplus/attributes.c:371
 hfsplus_delete_cat+0x844/0xdd0 fs/hfsplus/catalog.c:425
 hfsplus_unlink+0x213/0x7f0 fs/hfsplus/dir.c:385
 vfs_unlink+0x2fb/0x9b0 fs/namei.c:4343
 do_unlinkat+0x5c0/0x750 fs/namei.c:4407
 __do_sys_unlink fs/namei.c:4455 [inline]
 __se_sys_unlink fs/namei.c:4453 [inline]
 __x64_sys_unlink+0xc7/0x110 fs/namei.c:4453
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88801e1e0d00
 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 [ffff88801e1e0d00, ffff88801e1e0d98)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1e1e0
ksm flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffefff(slab)
raw: 00fff00000000000 ffff8880154423c0 ffffea0000770580 dead000000000003
raw: 0000000000000000 0000000080100010 00000001ffffefff 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 9026231499, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1468
 prep_new_page mm/page_alloc.c:1476 [inline]
 get_page_from_freelist+0x136a/0x2df0 mm/page_alloc.c:3402
 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4660
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 alloc_slab_page+0x56/0x110 mm/slub.c:2264
 allocate_slab mm/slub.c:2427 [inline]
 new_slab+0x84/0x260 mm/slub.c:2480
 ___slab_alloc+0xdac/0x1870 mm/slub.c:3666
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3756
 __slab_alloc_node mm/slub.c:3809 [inline]
 slab_alloc_node mm/slub.c:3988 [inline]
 kmalloc_trace_noprof+0x2b4/0x300 mm/slub.c:4147
 kmalloc_noprof include/linux/slab.h:660 [inline]
 kzalloc_noprof include/linux/slab.h:778 [inline]
 call_usermodehelper_setup+0x9a/0x340 kernel/umh.c:363
 kobject_uevent_env+0x14f1/0x1810 lib/kobject_uevent.c:613
 tty_register_device_attr+0x4bc/0x7c0 drivers/tty/tty_io.c:3296
 tty_register_device drivers/tty/tty_io.c:3210 [inline]
 tty_register_driver+0x431/0x800 drivers/tty/tty_io.c:3473
 legacy_pty_init drivers/tty/pty.c:579 [inline]
 pty_init+0x67c/0x1110 drivers/tty/pty.c:943
 do_one_initcall+0x128/0x700 init/main.c:1267
 do_initcall_level init/main.c:1329 [inline]
 do_initcalls init/main.c:1345 [inline]
 do_basic_setup init/main.c:1364 [inline]
 kernel_init_freeable+0x69d/0xca0 init/main.c:1578
 kernel_init+0x1c/0x2b0 init/main.c:1467
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88801e1e0c80: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88801e1e0d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88801e1e0d80: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc
                                           ^
 ffff88801e1e0e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88801e1e0e80: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc
==================================================================