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BUG: KASAN: slab-out-of-bounds in __ptep_get arch/arm64/include/asm/pgtable.h:315 [inline]
BUG: KASAN: slab-out-of-bounds in __clear_young_dirty_ptes arch/arm64/include/asm/pgtable.h:1309 [inline]
BUG: KASAN: slab-out-of-bounds in contpte_clear_young_dirty_ptes+0x104/0x214 arch/arm64/mm/contpte.c:389
Read of size 8 at addr ffff0000130f00b0 by task syz-executor.0/16922

CPU: 1 PID: 16922 Comm: syz-executor.0 Tainted: G        W          6.10.0-rc1-syzkaller-00027-g4a4be1ad3a6e #0
Hardware name: linux,dummy-virt (DT)
Call trace:
 dump_backtrace+0x9c/0x11c arch/arm64/kernel/stacktrace.c:317
 show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:324
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xa4/0xf4 lib/dump_stack.c:114
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xf4/0x5a4 mm/kasan/report.c:488
 kasan_report+0xc8/0x108 mm/kasan/report.c:601
 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381
 __ptep_get arch/arm64/include/asm/pgtable.h:315 [inline]
 __clear_young_dirty_ptes arch/arm64/include/asm/pgtable.h:1309 [inline]
 contpte_clear_young_dirty_ptes+0x104/0x214 arch/arm64/mm/contpte.c:389
 clear_young_dirty_ptes arch/arm64/include/asm/pgtable.h:1715 [inline]
 madvise_free_pte_range+0xce8/0x10e0 mm/madvise.c:767
 walk_pmd_range mm/pagewalk.c:143 [inline]
 walk_pud_range mm/pagewalk.c:221 [inline]
 walk_p4d_range mm/pagewalk.c:256 [inline]
 walk_pgd_range+0x8e8/0x14a4 mm/pagewalk.c:293
 __walk_page_range+0x420/0x5e4 mm/pagewalk.c:395
 walk_page_range+0x370/0x6f8 mm/pagewalk.c:521
 madvise_free_single_vma+0x300/0x5a8 mm/madvise.c:815
 madvise_dontneed_free mm/madvise.c:929 [inline]
 madvise_vma_behavior+0x30c/0x1028 mm/madvise.c:1046
 madvise_walk_vmas+0x114/0x210 mm/madvise.c:1268
 do_madvise+0x20c/0x6c4 mm/madvise.c:1464
 __do_sys_madvise mm/madvise.c:1481 [inline]
 __se_sys_madvise mm/madvise.c:1479 [inline]
 __arm64_sys_madvise+0x88/0xdc mm/madvise.c:1479
 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
 invoke_syscall+0x6c/0x25c arch/arm64/kernel/syscall.c:48
 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:133
 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:152
 el0_svc+0x50/0x180 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598

Allocated by task 1:
 kasan_save_stack+0x3c/0x64 mm/kasan/common.c:47
 kasan_save_track+0x20/0x3c mm/kasan/common.c:68
 kasan_save_alloc_info+0x40/0x54 mm/kasan/generic.c:565
 unpoison_slab_object mm/kasan/common.c:312 [inline]
 __kasan_slab_alloc+0x8c/0x90 mm/kasan/common.c:338
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3940 [inline]
 slab_alloc_node mm/slub.c:4000 [inline]
 kmem_cache_alloc_noprof+0x128/0x2e0 mm/slub.c:4007
 __kernfs_new_node+0xd0/0x704 fs/kernfs/dir.c:624
 kernfs_new_node+0x100/0x1f0 fs/kernfs/dir.c:700
 __kernfs_create_file+0x38/0x2dc fs/kernfs/file.c:1034
 sysfs_add_file_mode_ns+0x164/0x384 fs/sysfs/file.c:307
 create_files fs/sysfs/group.c:76 [inline]
 internal_create_group+0x3dc/0xb80 fs/sysfs/group.c:180
 internal_create_groups+0x80/0x128 fs/sysfs/group.c:220
 sysfs_create_groups+0x18/0x24 fs/sysfs/group.c:246
 driver_add_groups+0x34/0x54 drivers/base/driver.c:205
 bus_add_driver+0x2c0/0x4d4 drivers/base/bus.c:689
 driver_register+0xf4/0x3c0 drivers/base/driver.c:246
 usb_serial_bus_register+0x94/0xc0 drivers/usb/serial/bus.c:163
 usb_serial_register drivers/usb/serial/usb-serial.c:1439 [inline]
 usb_serial_register_drivers+0x414/0xaac drivers/usb/serial/usb-serial.c:1517
 f81232_init+0x68/0x7c drivers/usb/serial/f81232.c:1043
 do_one_initcall+0x140/0x7bc 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+0x56c/0xbf4 init/main.c:1578
 kernel_init+0x24/0x1e0 init/main.c:1467
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860

The buggy address belongs to the object at ffff0000130f0000
 which belongs to the cache kernfs_node_cache of size 176
The buggy address is located 0 bytes to the right of
 allocated 176-byte region [ffff0000130f0000, ffff0000130f00b0)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x530f0
flags: 0x1ffc00000000000(node=0|zone=0|lastcpupid=0x7ff)
page_type: 0xffffefff(slab)
raw: 01ffc00000000000 ffff00000a14d280 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000110011 00000001ffffefff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000130eff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000130f0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000130f0080: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 00
                                     ^
 ffff0000130f0100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000130f0180: 00 00 00 00 fc fc fc fc fc fc fc fc 00 00 00 00
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