loop0: 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+0x167/0x200 fs/hfs/bnode.c:35 Write of size 94 at addr ffff88814679d580 by task syz-executor386/5824 CPU: 0 UID: 0 PID: 5824 Comm: syz-executor386 Not tainted 6.14.0-rc5-syzkaller-00218-g2a520073e74f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __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:408 [inline] print_report+0x16e/0x5b0 mm/kasan/report.c:521 kasan_report+0x143/0x180 mm/kasan/report.c:634 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+0x167/0x200 fs/hfs/bnode.c:35 hfs_bnode_read_key+0x172/0x240 fs/hfs/bnode.c:70 hfs_brec_insert+0x7f3/0xbd0 fs/hfs/brec.c:159 hfs_cat_create+0x3dc/0x760 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_mknodat fs/namei.c:4269 [inline] __se_sys_mknodat fs/namei.c:4266 [inline] __x64_sys_mknodat+0xa7/0xc0 fs/namei.c:4266 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: 0033:0x7f8aa61bbad9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 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:00007fffaa082978 EFLAGS: 00000246 ORIG_RAX: 0000000000000103 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8aa61bbad9 RDX: 0000000000000000 RSI: 0000400000000100 RDI: 00000000ffffff9c RBP: 00007f8aa622f5f0 R08: 000055557a79b4c0 R09: 000055557a79b4c0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffaa0829a0 R13: 00007fffaa082bc8 R14: 431bde82d7b634db R15: 00007f8aa620403b Allocated by task 5824: 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+0x17f/0x760 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_mknodat fs/namei.c:4269 [inline] __se_sys_mknodat fs/namei.c:4266 [inline] __x64_sys_mknodat+0xa7/0xc0 fs/namei.c:4266 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 ffff88814679d580 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 0 bytes inside of allocated 78-byte region [ffff88814679d580, ffff88814679d5ce) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14679d flags: 0x57ff00000000000(node=1|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 057ff00000000000 ffff88801b041280 dead000000000100 dead000000000122 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 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 1, tgid 1 (swapper/0), ts 9249013162, free_ts 0 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_pages_mpol+0x311/0x660 mm/mempolicy.c:2270 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab+0x8f/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] __kmalloc_cache_noprof+0x27b/0x390 mm/slub.c:4320 kmalloc_noprof include/linux/slab.h:901 [inline] kzalloc_noprof include/linux/slab.h:1037 [inline] usb_hub_create_port_device+0xc8/0xc10 drivers/usb/core/port.c:746 hub_configure drivers/usb/core/hub.c:1711 [inline] hub_probe+0x262c/0x3780 drivers/usb/core/hub.c:1977 usb_probe_interface+0x641/0xbb0 drivers/usb/core/driver.c:396 really_probe+0x2b9/0xad0 drivers/base/dd.c:658 __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800 driver_probe_device+0x50/0x430 drivers/base/dd.c:830 __device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958 bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:462 page_owner free stack trace missing Memory state around the buggy address: ffff88814679d480: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc ffff88814679d500: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc >ffff88814679d580: 00 00 00 00 00 00 00 00 00 06 fc fc fc fc fc fc ^ ffff88814679d600: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ffff88814679d680: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ==================================================================