==================================================================
BUG: KASAN: use-after-free in ext4_xattr_delete_inode+0xc67/0xc80 fs/ext4/xattr.c:2894
Read of size 4 at addr ffff88811f6d4000 by task syz-executor223/287

CPU: 0 PID: 287 Comm: syz-executor223 Not tainted 5.10.215-syzkaller-00370-gb58b8f9dad93 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118
 print_address_description+0x81/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x179/0x1c0 mm/kasan/report.c:452
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308
 ext4_xattr_delete_inode+0xc67/0xc80 fs/ext4/xattr.c:2894
 ext4_evict_inode+0x1095/0x1730 fs/ext4/inode.c:300
 evict+0x2a3/0x6c0 fs/inode.c:577
 iput_final fs/inode.c:1697 [inline]
 iput+0x632/0x7e0 fs/inode.c:1723
 d_delete_notify include/linux/fsnotify.h:261 [inline]
 vfs_rmdir+0x271/0x3f0 fs/namei.c:3865
 do_rmdir+0x2cf/0x5c0 fs/namei.c:3912
 __do_sys_rmdir fs/namei.c:3930 [inline]
 __se_sys_rmdir fs/namei.c:3928 [inline]
 __x64_sys_rmdir+0x49/0x50 fs/namei.c:3928
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7f924093edc7
Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 54 00 00 00 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:00007ffdf418b818 EFLAGS: 00000207 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f924093edc7
RDX: 0000000000008890 RSI: 0000000000000000 RDI: 00007ffdf418c9c0
RBP: 0000000000000065 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000207 R12: 00007ffdf418c9c0
R13: 0000555555e84740 R14: 431bde82d7b634db R15: 00007ffdf418eb40

Allocated by task 296:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:430 [inline]
 __kasan_slab_alloc+0xb1/0xe0 mm/kasan/common.c:463
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x61/0x2f0 mm/slab.h:583
 slab_alloc_node mm/slub.c:2947 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 kmem_cache_alloc+0x168/0x2e0 mm/slub.c:2960
 mempool_alloc_slab+0x1d/0x30 mm/mempool.c:513
 mempool_alloc+0x11f/0x530 mm/mempool.c:393
 bio_alloc_bioset+0x1e0/0x650 block/bio.c:486
 bio_alloc include/linux/bio.h:412 [inline]
 submit_bh_wbc+0x1d1/0x700 fs/buffer.c:3057
 submit_bh+0x28/0x40 fs/buffer.c:3091
 write_mmp_block_thawed+0x3a5/0x560 fs/ext4/mmp.c:51
 write_mmp_block+0xc1/0x210 fs/ext4/mmp.c:67
 kmmpd+0x45a/0xb40 fs/ext4/mmp.c:180
 kthread+0x34b/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:299

Freed by task 19:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x121/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1595 [inline]
 slab_free_freelist_hook+0xc0/0x190 mm/slub.c:1621
 slab_free mm/slub.c:3203 [inline]
 kmem_cache_free+0xa9/0x1e0 mm/slub.c:3219
 mempool_free_slab+0x1d/0x30 mm/mempool.c:520
 mempool_free+0xd7/0x310 mm/mempool.c:502
 bio_free+0x157/0x1a0 block/bio.c:266
 bio_put+0xca/0x120
 end_bio_bh_io_sync+0xbf/0x110 fs/buffer.c:3037
 bio_endio+0x520/0x6a0 block/bio.c:1458
 req_bio_endio block/blk-core.c:263 [inline]
 blk_update_request+0x6e9/0x12b0 block/blk-core.c:1468
 blk_mq_end_request+0x43/0x80 block/blk-mq.c:569
 lo_complete_rq+0x154/0x2f0 drivers/block/loop.c:490
 blk_done_softirq+0x345/0x3d0 block/blk-mq.c:593
 __do_softirq+0x268/0x5bb kernel/softirq.c:309

The buggy address belongs to the object at ffff88811f6d4000
 which belongs to the cache bio-0 of size 216
The buggy address is located 0 bytes inside of
 216-byte region [ffff88811f6d4000, ffff88811f6d40d8)
The buggy address belongs to the page:
page:ffffea00047db500 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11f6d4
flags: 0x4000000000000200(slab)
raw: 4000000000000200 dead000000000100 dead000000000122 ffff888107fe5200
raw: 0000000000000000 00000000000c000c 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), pid 288, ts 23196645939, free_ts 23124766618
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x166/0x180 mm/page_alloc.c:2462
 get_page_from_freelist+0x2d8c/0x2f30 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x435/0xaf0 mm/page_alloc.c:5348
 allocate_slab mm/slub.c:1808 [inline]
 new_slab+0x80/0x400 mm/slub.c:1869
 new_slab_objects mm/slub.c:2627 [inline]
 ___slab_alloc+0x302/0x4b0 mm/slub.c:2791
 __slab_alloc+0x63/0xa0 mm/slub.c:2831
 slab_alloc_node mm/slub.c:2913 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 kmem_cache_alloc+0x1b9/0x2e0 mm/slub.c:2960
 mempool_alloc_slab+0x1d/0x30 mm/mempool.c:513
 mempool_alloc+0x11f/0x530 mm/mempool.c:393
 bio_alloc_bioset+0x1e0/0x650 block/bio.c:486
 bio_alloc include/linux/bio.h:412 [inline]
 mpage_alloc fs/mpage.c:115 [inline]
 do_mpage_readpage+0x14b9/0x1ae0 fs/mpage.c:342
 mpage_readahead+0x2d7/0x610 fs/mpage.c:425
 blkdev_readahead+0x1c/0x20 fs/block_dev.c:653
 read_pages+0x17e/0xbf0 mm/readahead.c:140
 page_cache_ra_unbounded+0x6be/0x890 mm/readahead.c:248
 do_page_cache_ra mm/readahead.c:277 [inline]
 force_page_cache_ra+0x373/0x3e0 mm/readahead.c:308
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 free_pcp_prepare mm/page_alloc.c:1421 [inline]
 free_unref_page_prepare+0x2ae/0x2d0 mm/page_alloc.c:3336
 free_unref_page_list+0x122/0xb20 mm/page_alloc.c:3443
 release_pages+0xea0/0xef0 mm/swap.c:1103
 __pagevec_release+0x84/0x100 mm/swap.c:1123
 pagevec_release include/linux/pagevec.h:88 [inline]
 __invalidate_mapping_pages+0xa67/0xb50 mm/truncate.c:607
 invalidate_mapping_pages+0x27/0x30 mm/truncate.c:632
 invalidate_bdev+0xa3/0x140 fs/block_dev.c:97
 ext4_put_super+0x67d/0xc70 fs/ext4/super.c:1237
 generic_shutdown_super+0x14f/0x2d0 fs/super.c:465
 kill_block_super+0x7e/0xe0 fs/super.c:1456
 deactivate_locked_super+0xad/0x110 fs/super.c:335
 deactivate_super+0xbe/0xf0 fs/super.c:366
 cleanup_mnt+0x45c/0x510 fs/namespace.c:1118
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1125
 task_work_run+0x129/0x190 kernel/task_work.c:165
 ptrace_notify+0x29e/0x350 kernel/signal.c:2277

Memory state around the buggy address:
 ffff88811f6d3f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88811f6d3f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88811f6d4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff88811f6d4080: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc
 ffff88811f6d4100: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
==================================================================