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BUG: KASAN: slab-use-after-free in get_max_inline_xattr_value_size+0x369/0x510 fs/ext4/inline.c:62
Read of size 4 at addr ffff88801df37084 by task syz-executor.0/30105

CPU: 1 PID: 30105 Comm: syz-executor.0 Not tainted 6.3.0-rc3-syzkaller-00338-gda8e7da11e4b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
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_get_max_inline_size+0x141/0x200 fs/ext4/inline.c:113
 ext4_prepare_inline_data+0x87/0x1d0 fs/ext4/inline.c:393
 ext4_da_write_inline_data_begin+0x208/0xe40 fs/ext4/inline.c:931
 ext4_da_write_begin+0x4da/0x960 fs/ext4/inode.c:3064
 generic_perform_write+0x300/0x5e0 mm/filemap.c:3926
 ext4_buffered_write_iter+0x122/0x3a0 fs/ext4/file.c:289
 ext4_file_write_iter+0x1d6/0x1930
 call_write_iter include/linux/fs.h:1851 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x7b2/0xbb0 fs/read_write.c:584
 ksys_write+0x1a0/0x2c0 fs/read_write.c:637
 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: 0033:0x7ff1fbc8c0f9
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:00007ff1fc9ec168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ff1fbdabf80 RCX: 00007ff1fbc8c0f9
RDX: 0000000000000010 RSI: 0000000020000100 RDI: 0000000000000004
RBP: 00007ff1fbce7b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc4c422f3f R14: 00007ff1fc9ec300 R15: 0000000000022000
 </TASK>

Allocated by task 5415:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:196 [inline]
 __do_kmalloc_node mm/slab_common.c:967 [inline]
 __kmalloc+0xb9/0x230 mm/slab_common.c:980
 kmalloc include/linux/slab.h:584 [inline]
 kzalloc include/linux/slab.h:720 [inline]
 tomoyo_encode2 security/tomoyo/realpath.c:45 [inline]
 tomoyo_encode+0x26f/0x530 security/tomoyo/realpath.c:80
 tomoyo_realpath_from_path+0x598/0x5e0 security/tomoyo/realpath.c:283
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_check_open_permission+0x254/0x4e0 security/tomoyo/file.c:771
 security_file_open+0x63/0xa0 security/security.c:1719
 do_dentry_open+0x308/0x10f0 fs/open.c:907
 do_open fs/namei.c:3560 [inline]
 path_openat+0x27b3/0x3170 fs/namei.c:3715
 do_filp_open+0x234/0x490 fs/namei.c:3742
 do_sys_openat2+0x13f/0x500 fs/open.c:1348
 do_sys_open fs/open.c:1364 [inline]
 __do_sys_openat fs/open.c:1380 [inline]
 __se_sys_openat fs/open.c:1375 [inline]
 __x64_sys_openat+0x247/0x290 fs/open.c:1375
 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

Freed by task 5415:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:521
 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
 kasan_slab_free include/linux/kasan.h:162 [inline]
 slab_free_hook mm/slub.c:1781 [inline]
 slab_free_freelist_hook mm/slub.c:1807 [inline]
 slab_free mm/slub.c:3787 [inline]
 __kmem_cache_free+0x264/0x3c0 mm/slub.c:3800
 tomoyo_check_open_permission+0x3b7/0x4e0 security/tomoyo/file.c:786
 security_file_open+0x63/0xa0 security/security.c:1719
 do_dentry_open+0x308/0x10f0 fs/open.c:907
 do_open fs/namei.c:3560 [inline]
 path_openat+0x27b3/0x3170 fs/namei.c:3715
 do_filp_open+0x234/0x490 fs/namei.c:3742
 do_sys_openat2+0x13f/0x500 fs/open.c:1348
 do_sys_open fs/open.c:1364 [inline]
 __do_sys_openat fs/open.c:1380 [inline]
 __se_sys_openat fs/open.c:1375 [inline]
 __x64_sys_openat+0x247/0x290 fs/open.c:1375
 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

The buggy address belongs to the object at ffff88801df37080
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 4 bytes inside of
 freed 64-byte region [ffff88801df37080, ffff88801df370c0)

The buggy address belongs to the physical page:
page:ffffea000077cdc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1df37
anon flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffff888012441640 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000200020 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 0x112c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 4434, tgid 4434 (udevd), ts 603291038906, free_ts 603290682057
 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_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]
 __kmem_cache_alloc_node+0x1b8/0x290 mm/slub.c:3491
 __do_kmalloc_node mm/slab_common.c:966 [inline]
 __kmalloc+0xa8/0x230 mm/slab_common.c:980
 kmalloc include/linux/slab.h:584 [inline]
 kzalloc include/linux/slab.h:720 [inline]
 tomoyo_encode2 security/tomoyo/realpath.c:45 [inline]
 tomoyo_encode+0x26f/0x530 security/tomoyo/realpath.c:80
 tomoyo_realpath_from_path+0x598/0x5e0 security/tomoyo/realpath.c:283
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_check_open_permission+0x254/0x4e0 security/tomoyo/file.c:771
 security_file_open+0x63/0xa0 security/security.c:1719
 do_dentry_open+0x308/0x10f0 fs/open.c:907
 do_open fs/namei.c:3560 [inline]
 path_openat+0x27b3/0x3170 fs/namei.c:3715
 do_filp_open+0x234/0x490 fs/namei.c:3742
 do_sys_openat2+0x13f/0x500 fs/open.c:1348
 do_sys_open fs/open.c:1364 [inline]
 __do_sys_openat fs/open.c:1380 [inline]
 __se_sys_openat fs/open.c:1375 [inline]
 __x64_sys_openat+0x247/0x290 fs/open.c:1375
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+0x37/0x3f0 mm/page_alloc.c:3483
 vfree+0x186/0x2e0 mm/vmalloc.c:2742
 __do_replace+0x9d7/0xc40
 do_replace net/ipv4/netfilter/arp_tables.c:985 [inline]
 do_arpt_set_ctl+0x1d39/0x3080 net/ipv4/netfilter/arp_tables.c:1421
 nf_setsockopt+0x28e/0x2c0 net/netfilter/nf_sockopt.c:101
 __sys_setsockopt+0x545/0x980 net/socket.c:2271
 __do_sys_setsockopt net/socket.c:2282 [inline]
 __se_sys_setsockopt net/socket.c:2279 [inline]
 __x64_sys_setsockopt+0xb5/0xd0 net/socket.c:2279
 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

Memory state around the buggy address:
 ffff88801df36f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88801df37000: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff88801df37080: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
                   ^
 ffff88801df37100: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
 ffff88801df37180: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
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