loop2: detected capacity change from 0 to 64 ================================================================== BUG: KASAN: slab-out-of-bounds in memcpy_from_page include/linux/highmem.h:393 [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+0x2e7/0x430 fs/hfs/bnode.c:70 Write of size 94 at addr ffff888078ff6880 by task syz.2.68/4620 CPU: 1 PID: 4620 Comm: syz.2.68 Not tainted 6.1.134-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x15f/0x4f0 mm/kasan/report.c:427 kasan_report+0x136/0x160 mm/kasan/report.c:531 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x27f/0x290 mm/kasan/generic.c:189 memcpy+0x3c/0x60 mm/kasan/shadow.c:66 memcpy_from_page include/linux/highmem.h:393 [inline] hfs_bnode_read fs/hfs/bnode.c:35 [inline] hfs_bnode_read_key+0x2e7/0x430 fs/hfs/bnode.c:70 hfs_brec_insert+0x69d/0xbd0 fs/hfs/brec.c:141 hfs_cat_create+0x419/0x8e0 fs/hfs/catalog.c:118 hfs_mkdir+0x68/0xe0 fs/hfs/dir.c:232 vfs_mkdir+0x3b6/0x590 fs/namei.c:4106 do_mkdirat+0x225/0x360 fs/namei.c:4131 __do_sys_mkdirat fs/namei.c:4146 [inline] __se_sys_mkdirat fs/namei.c:4144 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4144 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f8684b8b9d7 Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 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:00007f8685a24e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f8685a24ef0 RCX: 00007f8684b8b9d7 RDX: 00000000000001ff RSI: 0000200000000180 RDI: 00000000ffffff9c RBP: 0000200000000000 R08: 00002000000000c0 R09: 0000000000000000 R10: 0000200000000000 R11: 0000000000000246 R12: 0000200000000180 R13: 00007f8685a24eb0 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 4620: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:936 [inline] __kmalloc+0xb2/0x230 mm/slab_common.c:949 kmalloc include/linux/slab.h:568 [inline] hfs_find_init+0x8c/0x1e0 fs/hfs/bfind.c:21 hfs_cat_create+0x17d/0x8e0 fs/hfs/catalog.c:96 hfs_mkdir+0x68/0xe0 fs/hfs/dir.c:232 vfs_mkdir+0x3b6/0x590 fs/namei.c:4106 do_mkdirat+0x225/0x360 fs/namei.c:4131 __do_sys_mkdirat fs/namei.c:4146 [inline] __se_sys_mkdirat fs/namei.c:4144 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4144 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff888078ff6880 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 0 bytes inside of 96-byte region [ffff888078ff6880, ffff888078ff68e0) The buggy address belongs to the physical page: page:ffffea0001e3fd80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x78ff6 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 dead000000000100 dead000000000122 ffff888017c41780 raw: 0000000000000000 0000000080200020 00000001ffffffff 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 4262, tgid 4262 (syz-executor), ts 83298439260, free_ts 83280016225 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2532 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x3731/0x38d0 mm/page_alloc.c:4328 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5606 __alloc_pages_node include/linux/gfp.h:237 [inline] alloc_slab_page+0x59/0x150 mm/slub.c:1796 allocate_slab mm/slub.c:1939 [inline] new_slab+0x84/0x2d0 mm/slub.c:1992 ___slab_alloc+0xc20/0x1270 mm/slub.c:3180 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] __kmem_cache_alloc_node+0x19f/0x260 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:935 [inline] __kmalloc_node+0xa2/0x230 mm/slab_common.c:943 kmalloc_array_node include/linux/slab.h:676 [inline] kcalloc_node include/linux/slab.h:681 [inline] memcg_alloc_slab_cgroups+0x7d/0x120 mm/memcontrol.c:2891 memcg_slab_post_alloc_hook mm/slab.h:528 [inline] slab_post_alloc_hook+0xb5/0x3a0 mm/slab.h:745 slab_alloc_node mm/slub.c:3398 [inline] slab_alloc mm/slub.c:3406 [inline] __kmem_cache_alloc_lru mm/slub.c:3413 [inline] kmem_cache_alloc_lru+0x10c/0x2d0 mm/slub.c:3429 alloc_inode_sb include/linux/fs.h:3245 [inline] alloc_inode fs/inode.c:263 [inline] iget_locked+0x228/0x830 fs/inode.c:1373 kernfs_get_inode+0x4c/0x6b0 fs/kernfs/inode.c:254 kernfs_iop_lookup+0x265/0x380 fs/kernfs/dir.c:1189 lookup_open fs/namei.c:3460 [inline] open_last_lookups fs/namei.c:3550 [inline] path_openat+0x10fb/0x2e60 fs/namei.c:3780 do_filp_open+0x230/0x480 fs/namei.c:3810 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1459 [inline] free_pcp_prepare mm/page_alloc.c:1509 [inline] free_unref_page_prepare+0x12a6/0x15b0 mm/page_alloc.c:3384 free_unref_page+0x33/0x3e0 mm/page_alloc.c:3479 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x156/0x170 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737 slab_alloc_node mm/slub.c:3398 [inline] __kmem_cache_alloc_node+0x137/0x260 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:935 [inline] __kmalloc_node+0xa2/0x230 mm/slab_common.c:943 kmalloc_node include/linux/slab.h:589 [inline] kzalloc_node include/linux/slab.h:710 [inline] qdisc_alloc+0x93/0xa30 net/sched/sch_generic.c:948 qdisc_create_dflt+0x5d/0x500 net/sched/sch_generic.c:1009 attach_one_default_qdisc net/sched/sch_generic.c:1173 [inline] netdev_for_each_tx_queue include/linux/netdevice.h:2465 [inline] attach_default_qdiscs net/sched/sch_generic.c:1191 [inline] dev_activate+0x3b4/0x1200 net/sched/sch_generic.c:1250 __dev_open+0x348/0x440 net/core/dev.c:1497 __dev_change_flags+0x1db/0x6e0 net/core/dev.c:8626 dev_change_flags+0x87/0x190 net/core/dev.c:8697 do_setlink+0xdbd/0x4060 net/core/rtnetlink.c:2833 __rtnl_newlink net/core/rtnetlink.c:3608 [inline] rtnl_newlink+0x1736/0x2060 net/core/rtnetlink.c:3655 Memory state around the buggy address: ffff888078ff6780: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc ffff888078ff6800: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc >ffff888078ff6880: 00 00 00 00 00 00 00 00 00 06 fc fc fc fc fc fc ^ ffff888078ff6900: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff888078ff6980: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ==================================================================