==================================================================
BUG: KASAN: use-after-free in get_max_inline_xattr_value_size+0x373/0x510 fs/ext4/inline.c:61
Read of size 4 at addr ffff8881ddd0c084 by task kworker/0:2/118

CPU: 0 PID: 118 Comm: kworker/0:2 Not tainted 5.4.219-syzkaller-00002-ga0eae55f26a0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: events p9_write_work
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d8/0x241 lib/dump_stack.c:118
 print_address_description+0x8c/0x630 mm/kasan/report.c:384
 __kasan_report+0xf6/0x130 mm/kasan/report.c:516
 kasan_report+0x30/0x60 mm/kasan/common.c:653
 get_max_inline_xattr_value_size+0x373/0x510 fs/ext4/inline.c:61
 ext4_get_max_inline_size+0x139/0x1f0 fs/ext4/inline.c:112
 ext4_try_to_write_inline_data+0xd9/0x1750 fs/ext4/inline.c:673
 ext4_write_begin+0x247/0x1d50 fs/ext4/inode.c:1312
 ext4_da_write_begin+0x4a8/0xf80 fs/ext4/inode.c:3110
 generic_perform_write+0x2f9/0x5a0 mm/filemap.c:3311
 __generic_file_write_iter+0x239/0x490 mm/filemap.c:3440
 ext4_file_write_iter+0x495/0x10e0 fs/ext4/file.c:270
 call_write_iter include/linux/fs.h:1981 [inline]
 new_sync_write fs/read_write.c:483 [inline]
 __vfs_write+0x5e3/0x780 fs/read_write.c:496
 vfs_write+0x210/0x4f0 fs/read_write.c:558
 kernel_write+0xa3/0xf0 fs/read_write.c:535
 p9_fd_write net/9p/trans_fd.c:428 [inline]
 p9_write_work+0x598/0xce0 net/9p/trans_fd.c:479
 process_one_work+0x6ca/0xc40 kernel/workqueue.c:2287
 worker_thread+0xae0/0x1440 kernel/workqueue.c:2433
 kthread+0x2d8/0x360 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354

Allocated by task 300:
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 __kasan_kmalloc+0x131/0x1e0 mm/kasan/common.c:529
 slab_post_alloc_hook mm/slab.h:584 [inline]
 slab_alloc_node mm/slub.c:2829 [inline]
 slab_alloc mm/slub.c:2837 [inline]
 kmem_cache_alloc+0xd0/0x210 mm/slub.c:2842
 mempool_alloc+0x135/0x530 mm/mempool.c:393
 bio_alloc_bioset+0x1db/0x640 block/bio.c:483
 bio_alloc include/linux/bio.h:401 [inline]
 mpage_alloc fs/mpage.c:115 [inline]
 do_mpage_readpage+0x1459/0x1ad0 fs/mpage.c:342
 mpage_readpages+0x39b/0x510 fs/mpage.c:440
 read_pages+0x117/0x410 mm/readahead.c:126
 __do_page_cache_readahead+0x4c1/0x570 mm/readahead.c:212
 force_page_cache_readahead mm/readahead.c:243 [inline]
 page_cache_sync_readahead+0x339/0x3b0 mm/readahead.c:522
 generic_file_buffered_read mm/filemap.c:2070 [inline]
 generic_file_read_iter+0x5e1/0x2180 mm/filemap.c:2343
 blkdev_read_iter+0x12a/0x180 fs/block_dev.c:2043
 call_read_iter include/linux/fs.h:1975 [inline]
 new_sync_read fs/read_write.c:414 [inline]
 __vfs_read+0x5e0/0x760 fs/read_write.c:427
 vfs_read+0x166/0x370 fs/read_write.c:461
 ksys_read+0x198/0x2c0 fs/read_write.c:587
 do_syscall_64+0xcb/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Freed by task 9:
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 kasan_set_free_info mm/kasan/common.c:345 [inline]
 __kasan_slab_free+0x178/0x240 mm/kasan/common.c:487
 slab_free_hook mm/slub.c:1455 [inline]
 slab_free_freelist_hook+0x80/0x150 mm/slub.c:1494
 slab_free mm/slub.c:3080 [inline]
 kmem_cache_free+0xa9/0x1d0 mm/slub.c:3096
 req_bio_endio block/blk-core.c:247 [inline]
 blk_update_request+0x327/0xd90 block/blk-core.c:1478
 blk_mq_end_request+0x39/0x70 block/blk-mq.c:571
 blk_done_softirq+0x2f2/0x370 block/blk-softirq.c:37
 __do_softirq+0x23e/0x643 kernel/softirq.c:292

The buggy address belongs to the object at ffff8881ddd0c000
 which belongs to the cache bio-0 of size 200
The buggy address is located 132 bytes inside of
 200-byte region [ffff8881ddd0c000, ffff8881ddd0c0c8)
The buggy address belongs to the page:
page:ffffea0007774300 refcount:1 mapcount:0 mapping:ffff8881f33e6f00 index:0x0
flags: 0x8000000000000200(slab)
raw: 8000000000000200 dead000000000100 dead000000000122 ffff8881f33e6f00
raw: 0000000000000000 00000000800c000c 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 0x92880(GFP_NOWAIT|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_NOMEMALLOC)
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook mm/page_alloc.c:2165 [inline]
 prep_new_page+0x194/0x380 mm/page_alloc.c:2171
 get_page_from_freelist+0x524/0x560 mm/page_alloc.c:3794
 __alloc_pages_nodemask+0x372/0x860 mm/page_alloc.c:4891
 alloc_slab_page+0x39/0x3e0 mm/slub.c:343
 allocate_slab mm/slub.c:1683 [inline]
 new_slab+0x97/0x450 mm/slub.c:1749
 new_slab_objects mm/slub.c:2505 [inline]
 ___slab_alloc+0x320/0x4a0 mm/slub.c:2667
 __slab_alloc+0x5a/0x90 mm/slub.c:2707
 slab_alloc_node mm/slub.c:2792 [inline]
 slab_alloc mm/slub.c:2837 [inline]
 kmem_cache_alloc+0x100/0x210 mm/slub.c:2842
 mempool_alloc+0x135/0x530 mm/mempool.c:393
 bio_alloc_bioset+0x1db/0x640 block/bio.c:483
 bio_alloc include/linux/bio.h:401 [inline]
 mpage_alloc fs/mpage.c:115 [inline]
 do_mpage_readpage+0x1459/0x1ad0 fs/mpage.c:342
 mpage_readpages+0x39b/0x510 fs/mpage.c:440
 read_pages+0x117/0x410 mm/readahead.c:126
 __do_page_cache_readahead+0x4c1/0x570 mm/readahead.c:212
 force_page_cache_readahead mm/readahead.c:243 [inline]
 page_cache_sync_readahead+0x339/0x3b0 mm/readahead.c:522
 generic_file_buffered_read mm/filemap.c:2070 [inline]
 generic_file_read_iter+0x5e1/0x2180 mm/filemap.c:2343
page_owner free stack trace missing

Memory state around the buggy address:
 ffff8881ddd0bf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881ddd0c000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881ddd0c080: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
                   ^
 ffff8881ddd0c100: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
 ffff8881ddd0c180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
EXT4-fs error (device loop0): ext4_xattr_ibody_find:2196: inode #18: comm kworker/0:2: corrupted in-inode xattr