loop8: detected capacity change from 0 to 64
==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy_from_page include/linux/highmem.h:423 [inline]
BUG: KASAN: slab-out-of-bounds in hfs_bnode_read fs/hfs/bnode.c:35 [inline]
BUG: KASAN: slab-out-of-bounds in hfs_bnode_read_key+0x314/0x450 fs/hfs/bnode.c:70
Write of size 94 at addr ffff88807f030c80 by task syz.8.780/14094

CPU: 0 UID: 0 PID: 14094 Comm: syz.8.780 Not tainted 6.14.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:489
 kasan_report+0x143/0x180 mm/kasan/report.c:602
 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189
 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106
 memcpy_from_page include/linux/highmem.h:423 [inline]
 hfs_bnode_read fs/hfs/bnode.c:35 [inline]
 hfs_bnode_read_key+0x314/0x450 fs/hfs/bnode.c:70
 hfs_brec_insert+0x7f3/0xbd0 fs/hfs/brec.c:159
 hfs_cat_create+0x41d/0xa50 fs/hfs/catalog.c:118
 hfs_create+0x66/0xe0 fs/hfs/dir.c:202
 vfs_create+0x23c/0x3d0 fs/namei.c:3350
 do_mknodat+0x447/0x5b0 fs/namei.c:4241
 __do_sys_mknod fs/namei.c:4274 [inline]
 __se_sys_mknod fs/namei.c:4272 [inline]
 __x64_sys_mknod+0x8c/0xa0 fs/namei.c:4272
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f44a038cde9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f44a11f2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007f44a05a5fa0 RCX: 00007f44a038cde9
RDX: 0000000000000711 RSI: 0000000000000004 RDI: 0000400000000000
RBP: 00007f44a040e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f44a05a5fa0 R15: 00007ffe43252c78
 </TASK>

Allocated by task 14094:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __do_kmalloc_node mm/slub.c:4294 [inline]
 __kmalloc_noprof+0x285/0x4c0 mm/slub.c:4306
 kmalloc_noprof include/linux/slab.h:905 [inline]
 hfs_find_init+0x90/0x1f0 fs/hfs/bfind.c:21
 hfs_cat_create+0x182/0xa50 fs/hfs/catalog.c:96
 hfs_create+0x66/0xe0 fs/hfs/dir.c:202
 vfs_create+0x23c/0x3d0 fs/namei.c:3350
 do_mknodat+0x447/0x5b0 fs/namei.c:4241
 __do_sys_mknod fs/namei.c:4274 [inline]
 __se_sys_mknod fs/namei.c:4272 [inline]
 __x64_sys_mknod+0x8c/0xa0 fs/namei.c:4272
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88807f030c80
 which belongs to the cache kmalloc-96 of size 96
The buggy address is located 0 bytes inside of
 allocated 78-byte region [ffff88807f030c80, ffff88807f030cce)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7f030
anon flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801ac41280 ffffea00006b2480 dead000000000005
raw: 0000000000000000 0000000080200020 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 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 5196, tgid 5196 (udevd), ts 67624621897, free_ts 67587566663
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551
 prep_new_page mm/page_alloc.c:1559 [inline]
 get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3477
 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4739
 alloc_slab_page mm/slub.c:2425 [inline]
 allocate_slab+0x66/0x3a0 mm/slub.c:2587
 new_slab mm/slub.c:2640 [inline]
 ___slab_alloc+0xc27/0x14a0 mm/slub.c:3826
 __slab_alloc+0x58/0xa0 mm/slub.c:3916
 __slab_alloc_node mm/slub.c:3991 [inline]
 slab_alloc_node mm/slub.c:4152 [inline]
 __do_kmalloc_node mm/slub.c:4293 [inline]
 __kmalloc_node_noprof+0x2ee/0x4d0 mm/slub.c:4300
 kmalloc_array_node_noprof include/linux/slab.h:1018 [inline]
 alloc_slab_obj_exts mm/slub.c:1964 [inline]
 account_slab mm/slub.c:2550 [inline]
 allocate_slab+0x179/0x3a0 mm/slub.c:2605
 new_slab mm/slub.c:2640 [inline]
 ___slab_alloc+0xc27/0x14a0 mm/slub.c:3826
 __slab_alloc+0x58/0xa0 mm/slub.c:3916
 __slab_alloc_node mm/slub.c:3991 [inline]
 slab_alloc_node mm/slub.c:4152 [inline]
 kmem_cache_alloc_lru_noprof+0x26c/0x390 mm/slub.c:4183
 alloc_inode+0x87/0x1a0 fs/inode.c:338
 iget_locked+0xf1/0x5a0 fs/inode.c:1487
 kernfs_get_inode+0x51/0x760 fs/kernfs/inode.c:251
 kernfs_iop_lookup+0x266/0x390 fs/kernfs/dir.c:1215
 __lookup_slow+0x296/0x400 fs/namei.c:1793
page last free pid 5903 tgid 5902 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_unref_folios+0xe2f/0x18a0 mm/page_alloc.c:2707
 folios_put_refs+0x76c/0x860 mm/swap.c:994
 folio_batch_release include/linux/pagevec.h:101 [inline]
 mapping_try_invalidate+0x3f7/0x550 mm/truncate.c:501
 open_ctree+0xac6/0x2ab0 fs/btrfs/disk-io.c:3309
 btrfs_fill_super fs/btrfs/super.c:972 [inline]
 btrfs_get_tree_super fs/btrfs/super.c:1898 [inline]
 btrfs_get_tree+0x12da/0x1a30 fs/btrfs/super.c:2093
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 fc_mount+0x1b/0xb0 fs/namespace.c:1271
 btrfs_get_tree_subvol fs/btrfs/super.c:2051 [inline]
 btrfs_get_tree+0x6b1/0x1a30 fs/btrfs/super.c:2094
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 do_new_mount+0x2be/0xb40 fs/namespace.c:3560
 do_mount fs/namespace.c:3900 [inline]
 __do_sys_mount fs/namespace.c:4111 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88807f030b80: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc
 ffff88807f030c00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff88807f030c80: 00 00 00 00 00 00 00 00 00 06 fc fc fc fc fc fc
                                              ^
 ffff88807f030d00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff88807f030d80: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc
==================================================================