hpfs: filesystem error: improperly stopped
hpfs: filesystem error: warning: spare dnodes used, try chkdsk
hpfs: You really don't want any checks? You are crazy...
hpfs: Code page index out of array
hpfs: code page support is disabled
==================================================================
BUG: KASAN: slab-out-of-bounds in strcmp+0x6b/0xb0 lib/string.c:400
Read of size 1 at addr ffff888024630aaf by task syz.2.34/4447

CPU: 0 PID: 4447 Comm: syz.2.34 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 print_address_description+0x60/0x2d0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0xdf/0x130 mm/kasan/report.c:451
 strcmp+0x6b/0xb0 lib/string.c:400
 hpfs_get_ea+0x111/0xc80 fs/hpfs/ea.c:139
 hpfs_read_inode+0x19a/0x1000 fs/hpfs/inode.c:63
 hpfs_fill_super+0x12d1/0x1eb0 fs/hpfs/super.c:712
 mount_bdev+0x287/0x3c0 fs/super.c:1400
 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x24a/0xa40 fs/namespace.c:3034
 do_mount fs/namespace.c:3377 [inline]
 __do_sys_mount fs/namespace.c:3585 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3562
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f38df967e6a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 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:00007f38ddbcce68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f38ddbccef0 RCX: 00007f38df967e6a
RDX: 0000200000000000 RSI: 0000200000009ec0 RDI: 00007f38ddbcceb0
RBP: 0000200000000000 R08: 00007f38ddbccef0 R09: 0000000003a00041
R10: 0000000003a00041 R11: 0000000000000246 R12: 0000200000009ec0
R13: 00007f38ddbcceb0 R14: 0000000000009e24 R15: 0000200000000040
 </TASK>

Allocated by task 1:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 ____kasan_kmalloc mm/kasan/common.c:513 [inline]
 __kasan_kmalloc+0xb5/0xf0 mm/kasan/common.c:522
 kvasprintf+0xd4/0x180 lib/kasprintf.c:25
 kobject_set_name_vargs+0x5d/0x110 lib/kobject.c:297
 dev_set_name+0xd1/0x120 drivers/base/core.c:3200
 usb_hub_create_port_device+0x3d7/0xaf0 drivers/usb/core/port.c:565
 hub_configure drivers/usb/core/hub.c:1695 [inline]
 hub_probe+0x252f/0x35e0 drivers/usb/core/hub.c:1951
 usb_probe_interface+0x5a0/0xaf0 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x284/0xc80 drivers/base/dd.c:595
 __driver_probe_device+0x18c/0x330 drivers/base/dd.c:755
 driver_probe_device+0x4f/0x420 drivers/base/dd.c:785
 __device_attach_driver+0x2b0/0x500 drivers/base/dd.c:907
 bus_for_each_drv+0x175/0x200 drivers/base/bus.c:429
 __device_attach+0x29b/0x460 drivers/base/dd.c:979
 bus_probe_device+0xbc/0x1e0 drivers/base/bus.c:489
 device_add+0xa00/0xfb0 drivers/base/core.c:3412
 usb_set_configuration+0x1991/0x1fd0 drivers/usb/core/message.c:2165
 usb_generic_driver_probe+0x89/0x150 drivers/usb/core/generic.c:238
 usb_probe_device+0x139/0x270 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x284/0xc80 drivers/base/dd.c:595
 __driver_probe_device+0x18c/0x330 drivers/base/dd.c:755
 driver_probe_device+0x4f/0x420 drivers/base/dd.c:785
 __device_attach_driver+0x2b0/0x500 drivers/base/dd.c:907
 bus_for_each_drv+0x175/0x200 drivers/base/bus.c:429
 __device_attach+0x29b/0x460 drivers/base/dd.c:979
 bus_probe_device+0xbc/0x1e0 drivers/base/bus.c:489
 device_add+0xa00/0xfb0 drivers/base/core.c:3412
 usb_new_device+0xd53/0x1640 drivers/usb/core/hub.c:2632
 register_root_hub+0x278/0x580 drivers/usb/core/hcd.c:1021
 usb_add_hcd+0xa88/0xef0 drivers/usb/core/hcd.c:3007
 vhci_hcd_probe+0x140/0x370 drivers/usb/usbip/vhci_hcd.c:1387
 platform_probe+0x137/0x1c0 drivers/base/platform.c:1391
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x284/0xc80 drivers/base/dd.c:595
 __driver_probe_device+0x18c/0x330 drivers/base/dd.c:755
 driver_probe_device+0x4f/0x420 drivers/base/dd.c:785
 __device_attach_driver+0x2b0/0x500 drivers/base/dd.c:907
 bus_for_each_drv+0x175/0x200 drivers/base/bus.c:429
 __device_attach+0x29b/0x460 drivers/base/dd.c:979
 bus_probe_device+0xbc/0x1e0 drivers/base/bus.c:489
 device_add+0xa00/0xfb0 drivers/base/core.c:3412
 platform_device_add+0x4b9/0x820 drivers/base/platform.c:712
 vhci_hcd_init+0x3ae/0x4e0 drivers/usb/usbip/vhci_hcd.c:1571
 do_one_initcall+0x1ee/0x680 init/main.c:1316
 do_initcall_level+0x137/0x1f0 init/main.c:1389
 do_initcalls+0x4b/0x90 init/main.c:1405
 kernel_init_freeable+0x3ce/0x560 init/main.c:1629
 kernel_init+0x19/0x1b0 init/main.c:1520
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287

The buggy address belongs to the object at ffff888024630aa0
 which belongs to the cache kmalloc-16 of size 16
The buggy address is located 15 bytes inside of
 16-byte region [ffff888024630aa0, ffff888024630ab0)
The buggy address belongs to the page:
page:ffffea0000918c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x24630
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea000087a000 0000000200000002 ffff8880168413c0
raw: 0000000000000000 0000000000800080 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, ts 8136920198, free_ts 8059519737
 prep_new_page mm/page_alloc.c:2426 [inline]
 get_page_from_freelist+0x1b77/0x1c60 mm/page_alloc.c:4192
 __alloc_pages+0x1e1/0x470 mm/page_alloc.c:5487
 alloc_page_interleave+0x24/0x1e0 mm/mempolicy.c:2031
 alloc_slab_page mm/slub.c:1780 [inline]
 allocate_slab mm/slub.c:1917 [inline]
 new_slab+0xc0/0x4b0 mm/slub.c:1980
 ___slab_alloc+0x81e/0xdf0 mm/slub.c:3013
 __slab_alloc mm/slub.c:3100 [inline]
 slab_alloc_node mm/slub.c:3191 [inline]
 slab_alloc mm/slub.c:3233 [inline]
 __kmalloc_track_caller+0x1cb/0x330 mm/slub.c:4930
 kvasprintf+0xd4/0x180 lib/kasprintf.c:25
 kasprintf+0xd1/0x120 lib/kasprintf.c:59
 device_get_devnode+0xab/0x290 drivers/base/core.c:3687
 dev_uevent+0x13c/0x6f0 drivers/base/core.c:2320
 kobject_uevent_env+0x46a/0x890 lib/kobject_uevent.c:572
 device_add+0x91c/0xfb0 drivers/base/core.c:3393
 usb_new_device+0xd53/0x1640 drivers/usb/core/hub.c:2632
 register_root_hub+0x278/0x580 drivers/usb/core/hcd.c:1021
 usb_add_hcd+0xa88/0xef0 drivers/usb/core/hcd.c:3007
 vhci_hcd_probe+0x1bd/0x370 drivers/usb/usbip/vhci_hcd.c:1401
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1340 [inline]
 free_pcp_prepare mm/page_alloc.c:1391 [inline]
 free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317
 free_unref_page+0x94/0x280 mm/page_alloc.c:3396
 __vunmap+0x8ab/0xa40 mm/vmalloc.c:2628
 free_work+0x56/0x80 mm/vmalloc.c:95
 process_one_work+0x863/0x1000 kernel/workqueue.c:2310
 worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287

Memory state around the buggy address:
 ffff888024630980: 00 04 fc fc 00 04 fc fc 00 04 fc fc 00 04 fc fc
 ffff888024630a00: 00 04 fc fc 00 04 fc fc 00 04 fc fc 00 04 fc fc
>ffff888024630a80: 00 04 fc fc 00 04 fc fc 00 04 fc fc 00 04 fc fc
                                  ^
 ffff888024630b00: 00 04 fc fc 00 00 fc fc 00 00 fc fc 00 00 fc fc
 ffff888024630b80: 00 00 fc fc 00 00 fc fc 00 00 fc fc 00 00 fc fc
==================================================================