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BUG: KASAN: slab-out-of-bounds in get_max_inline_xattr_value_size+0x369/0x510 fs/ext4/inline.c:62
Read of size 4 at addr ffff8880212db0b4 by task syz-executor.3/6587

CPU: 0 PID: 6587 Comm: syz-executor.3 Not tainted 6.3.0-rc7-syzkaller-00191-g622322f53c6d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:319 [inline]
 print_report+0x163/0x540 mm/kasan/report.c:430
 kasan_report+0x176/0x1b0 mm/kasan/report.c:536
 get_max_inline_xattr_value_size+0x369/0x510 fs/ext4/inline.c:62
 ext4_update_inline_dir fs/ext4/inline.c:1109 [inline]
 ext4_try_add_inline_entry+0x34b/0xb70 fs/ext4/inline.c:1306
 ext4_add_entry+0x535/0x1010 fs/ext4/namei.c:2384
 ext4_mkdir+0x553/0xce0 fs/ext4/namei.c:3006
 vfs_mkdir+0x29d/0x450 fs/namei.c:4038
 do_mkdirat+0x264/0x520 fs/namei.c:4061
 __do_sys_mkdir fs/namei.c:4081 [inline]
 __se_sys_mkdir fs/namei.c:4079 [inline]
 __x64_sys_mkdir+0x6e/0x80 fs/namei.c:4079
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f123528c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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:00007f1235fbf168 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007f12353abf80 RCX: 00007f123528c169
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200000c0
RBP: 00007f12352e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff7a2e4aff R14: 00007f1235fbf300 R15: 0000000000022000
 </TASK>

Allocated by task 1:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
 __kasan_slab_alloc+0x66/0x70 mm/kasan/common.c:328
 kasan_slab_alloc include/linux/kasan.h:186 [inline]
 slab_post_alloc_hook+0x68/0x3a0 mm/slab.h:769
 slab_alloc_node mm/slub.c:3452 [inline]
 slab_alloc mm/slub.c:3460 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3467 [inline]
 kmem_cache_alloc+0x11f/0x2e0 mm/slub.c:3476
 kmem_cache_zalloc include/linux/slab.h:710 [inline]
 __kernfs_new_node+0xdf/0x740 fs/kernfs/dir.c:611
 kernfs_new_node+0x99/0x170 fs/kernfs/dir.c:673
 __kernfs_create_file+0x49/0x2e0 fs/kernfs/file.c:1047
 sysfs_add_file_mode_ns+0x24a/0x300 fs/sysfs/file.c:294
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0x549/0xed0 fs/sysfs/group.c:148
 internal_create_groups fs/sysfs/group.c:188 [inline]
 sysfs_create_groups+0x56/0x110 fs/sysfs/group.c:214
 device_add_groups drivers/base/core.c:2678 [inline]
 device_add_attrs+0x199/0x600 drivers/base/core.c:2798
 device_add+0x68a/0x1060 drivers/base/core.c:3543
 usb_add_gadget+0x2a4/0x5b0 drivers/usb/gadget/udc/core.c:1305
 usb_add_gadget_udc_release drivers/usb/gadget/udc/core.c:1360 [inline]
 usb_add_gadget_udc+0x14c/0x180 drivers/usb/gadget/udc/core.c:1407
 dummy_udc_probe+0x6d4/0x7d0 drivers/usb/gadget/udc/dummy_hcd.c:1095
 platform_probe+0x135/0x1b0 drivers/base/platform.c:1404
 really_probe+0x2af/0xc80 drivers/base/dd.c:631
 __driver_probe_device+0x1c3/0x3f0 drivers/base/dd.c:768
 driver_probe_device+0x50/0x420 drivers/base/dd.c:798
 __device_attach_driver+0x2d3/0x520 drivers/base/dd.c:926
 bus_for_each_drv+0x24a/0x2d0 drivers/base/bus.c:457
 __device_attach+0x32f/0x510 drivers/base/dd.c:998
 bus_probe_device+0x185/0x260 drivers/base/bus.c:532
 device_add+0xbcf/0x1060 drivers/base/core.c:3589
 platform_device_add+0x472/0x7d0 drivers/base/platform.c:717
 dummy_hcd_init+0xb5f/0x1070 drivers/usb/gadget/udc/dummy_hcd.c:2850
 do_one_initcall+0x23d/0x7d0 init/main.c:1310
 do_initcall_level+0x157/0x210 init/main.c:1383
 do_initcalls+0x3f/0x80 init/main.c:1399
 kernel_init_freeable+0x477/0x630 init/main.c:1638
 kernel_init+0x1d/0x2a0 init/main.c:1526
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

The buggy address belongs to the object at ffff8880212db000
 which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 12 bytes to the right of
 allocated 168-byte region [ffff8880212db000, ffff8880212db0a8)

The buggy address belongs to the physical page:
page:ffffea000084b6c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x212db
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffff888140008dc0 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000110011 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, tgid 1 (swapper/0), ts 10414092712, free_ts 10412284695
 prep_new_page mm/page_alloc.c:2553 [inline]
 get_page_from_freelist+0x3246/0x33c0 mm/page_alloc.c:4326
 __alloc_pages+0x255/0x670 mm/page_alloc.c:5592
 alloc_page_interleave+0x22/0x1d0 mm/mempolicy.c:2110
 alloc_slab_page+0x6a/0x160 mm/slub.c:1851
 allocate_slab mm/slub.c:1998 [inline]
 new_slab+0x84/0x2f0 mm/slub.c:2051
 ___slab_alloc+0xa85/0x10a0 mm/slub.c:3193
 __slab_alloc mm/slub.c:3292 [inline]
 __slab_alloc_node mm/slub.c:3345 [inline]
 slab_alloc_node mm/slub.c:3442 [inline]
 slab_alloc mm/slub.c:3460 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3467 [inline]
 kmem_cache_alloc+0x1b9/0x2e0 mm/slub.c:3476
 kmem_cache_zalloc include/linux/slab.h:710 [inline]
 __kernfs_new_node+0xdf/0x740 fs/kernfs/dir.c:611
 kernfs_new_node+0x99/0x170 fs/kernfs/dir.c:673
 __kernfs_create_file+0x49/0x2e0 fs/kernfs/file.c:1047
 sysfs_add_file_mode_ns+0x24a/0x300 fs/sysfs/file.c:294
 create_files fs/sysfs/group.c:64 [inline]
 internal_create_group+0x549/0xed0 fs/sysfs/group.c:148
 internal_create_groups fs/sysfs/group.c:188 [inline]
 sysfs_create_groups+0x56/0x110 fs/sysfs/group.c:214
 device_add_groups drivers/base/core.c:2678 [inline]
 device_add_attrs+0x199/0x600 drivers/base/core.c:2798
 device_add+0x68a/0x1060 drivers/base/core.c:3543
 usb_add_gadget+0x2a4/0x5b0 drivers/usb/gadget/udc/core.c:1305
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1454 [inline]
 free_pcp_prepare mm/page_alloc.c:1504 [inline]
 free_unref_page_prepare+0xe2f/0xe70 mm/page_alloc.c:3388
 free_unref_page_list+0x596/0x830 mm/page_alloc.c:3529
 release_pages+0x219e/0x2470 mm/swap.c:1042
 tlb_batch_pages_flush mm/mmu_gather.c:97 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:292 [inline]
 tlb_flush_mmu+0x100/0x210 mm/mmu_gather.c:299
 tlb_finish_mmu+0xd4/0x1f0 mm/mmu_gather.c:391
 exit_mmap+0x3ce/0x9d0 mm/mmap.c:3081
 __mmput+0x115/0x3c0 kernel/fork.c:1208
 free_bprm+0x144/0x320 fs/exec.c:1489
 kernel_execve+0x8f5/0xa10 fs/exec.c:2022
 call_usermodehelper_exec_async+0x233/0x370 kernel/umh.c:110
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

Memory state around the buggy address:
 ffff8880212daf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880212db000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880212db080: 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 00 00
                                     ^
 ffff8880212db100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880212db180: 00 00 fc fc fc fc fc fc fc fc 00 00 00 00 00 00
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