[EXT4 FS bs=1024, gc=1, bpg=131072, ipg=32, mo=e855c01c, mo2=0003]
System zones: 0-1, 3-36
EXT4-fs (loop7): mounted filesystem without journal. Opts: grpquota,delalloc,resuid=0x0000000000000000,debug,dioread_nolock,bsddf,nomblk_io_submit,noauto_da_alloc,,errors=continue
==================================================================
BUG: KASAN: use-after-free in ext4_get_inode_usage+0x3a1/0x520 fs/ext4/xattr.c:817
Read of size 4 at addr ffff888111578070 by task syz.7.398/2060

CPU: 0 PID: 2060 Comm: syz.7.398 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x1a7/0x208 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0xe2/0x130 mm/kasan/report.c:452
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308
 ext4_get_inode_usage+0x3a1/0x520 fs/ext4/xattr.c:817
 __dquot_transfer+0x192/0x20d0 fs/quota/dquot.c:2017
 dquot_transfer+0x2f1/0x460 fs/quota/dquot.c:2169
 ext4_setattr+0x715/0x1950 fs/ext4/inode.c:5577
 notify_change+0xab3/0xe40 fs/attr.c:410
 chown_common+0x335/0x500 fs/open.c:675
 vfs_fchown fs/open.c:742 [inline]
 ksys_fchown+0xef/0x160 fs/open.c:753
 __do_sys_fchown fs/open.c:761 [inline]
 __se_sys_fchown fs/open.c:759 [inline]
 __x64_sys_fchown+0x7a/0x90 fs/open.c:759
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fd45bcf4e59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd45a74f028 EFLAGS: 00000246 ORIG_RAX: 000000000000005d
RAX: ffffffffffffffda RBX: 00007fd45bf6dfa0 RCX: 00007fd45bcf4e59
RDX: 000000000000ee01 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007fd45bd8ad6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd45bf6e038 R14: 00007fd45bf6dfa0 R15: 00007fff3fdd5808

Allocated by task 1251:
 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+0xbd/0xf0 mm/kasan/common.c:463
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:580
 slab_alloc_node mm/slub.c:2952 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 kmem_cache_alloc+0x162/0x2d0 mm/slub.c:2965
 mempool_alloc_slab+0x1d/0x30 mm/mempool.c:513
 mempool_alloc+0x11e/0x460 mm/mempool.c:393
 bio_alloc_bioset+0x18c/0x570 block/bio.c:486
 bio_alloc include/linux/bio.h:412 [inline]
 mpage_alloc fs/mpage.c:115 [inline]
 do_mpage_readpage+0x1441/0x1a40 fs/mpage.c:342
 mpage_readahead+0x272/0x560 fs/mpage.c:425
 blkdev_readahead+0x1c/0x20 fs/block_dev.c:653
 read_pages+0x17b/0xb60 mm/readahead.c:140
 page_cache_ra_unbounded+0x693/0x7e0 mm/readahead.c:248
 do_page_cache_ra mm/readahead.c:277 [inline]
 force_page_cache_ra+0x3a9/0x400 mm/readahead.c:308
 page_cache_sync_ra+0x237/0x2a0 mm/readahead.c:582
 page_cache_sync_readahead include/linux/pagemap.h:837 [inline]
 generic_file_buffered_read+0x574/0x2770 mm/filemap.c:2250
 generic_file_read_iter+0x11e/0x5c0 mm/filemap.c:2568
 blkdev_read_iter+0x12f/0x160 fs/block_dev.c:1956
 call_read_iter include/linux/fs.h:2060 [inline]
 new_sync_read fs/read_write.c:415 [inline]
 vfs_read+0x62a/0xa60 fs/read_write.c:496
 ksys_read+0x149/0x250 fs/read_write.c:634
 __do_sys_read fs/read_write.c:644 [inline]
 __se_sys_read fs/read_write.c:642 [inline]
 __x64_sys_read+0x7b/0x90 fs/read_write.c:642
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Freed by task 12:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 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:1600 [inline]
 slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1626
 slab_free mm/slub.c:3208 [inline]
 kmem_cache_free+0x100/0x2d0 mm/slub.c:3224
 mempool_free_slab+0x1d/0x30 mm/mempool.c:520
 mempool_free+0xd8/0x340 mm/mempool.c:502
 bio_free+0x24a/0x360 block/bio.c:266
 bio_put+0xbf/0x110 block/bio.c:-1
 mpage_end_io+0x2ea/0x560 fs/mpage.c:76
 bio_endio+0x646/0x860 block/bio.c:1458
 req_bio_endio block/blk-core.c:263 [inline]
 blk_update_request+0x74a/0x1090 block/blk-core.c:1468
 blk_mq_end_request+0x41/0x80 block/blk-mq.c:572
 lo_complete_rq+0x147/0x2d0 drivers/block/loop.c:490
 blk_done_softirq+0x26f/0x2f0 block/blk-mq.c:596
 __do_softirq+0x255/0x563 kernel/softirq.c:309

The buggy address belongs to the object at ffff888111578000
 which belongs to the cache bio-0 of size 216
The buggy address is located 112 bytes inside of
 216-byte region [ffff888111578000, ffff8881115780d8)
The buggy address belongs to the page:
page:ffffea0004455e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x111578
flags: 0x4000000000000200(slab)
raw: 4000000000000200 ffffea00049a1f40 0000000200000002 ffff888107fbf500
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 0x192880(GFP_NOWAIT|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 978, ts 367574646976, free_ts 367574546422
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x179/0x180 mm/page_alloc.c:2462
 get_page_from_freelist+0x223b/0x23d0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x290/0x620 mm/page_alloc.c:5384
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1813 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1874
 new_slab_objects mm/slub.c:2632 [inline]
 ___slab_alloc+0x2a6/0x450 mm/slub.c:2796
 __slab_alloc+0x63/0xa0 mm/slub.c:2836
 slab_alloc_node mm/slub.c:2918 [inline]
 slab_alloc mm/slub.c:2960 [inline]
 kmem_cache_alloc+0x1ac/0x2d0 mm/slub.c:2965
 mempool_alloc_slab+0x1d/0x30 mm/mempool.c:513
 mempool_alloc+0x11e/0x460 mm/mempool.c:393
 bio_alloc_bioset+0x18c/0x570 block/bio.c:486
 bio_alloc include/linux/bio.h:412 [inline]
 iomap_dio_bio_actor+0x644/0x1270 fs/iomap/direct-io.c:284
 iomap_dio_actor+0x376/0x5f0 fs/iomap/direct-io.c:-1
 iomap_apply+0x2b9/0x720 fs/iomap/apply.c:84
 __iomap_dio_rw+0x7bb/0x1120 fs/iomap/direct-io.c:531
 iomap_dio_rw+0x35/0x80 fs/iomap/direct-io.c:619
 ext4_dio_read_iter fs/ext4/file.c:79 [inline]
 ext4_file_read_iter+0x41b/0x530 fs/ext4/file.c:131
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+0x2b7/0x2d0 mm/page_alloc.c:3336
 free_unref_page+0x7f/0x190 mm/page_alloc.c:3391
 __put_single_page mm/swap.c:104 [inline]
 __put_page+0xae/0xe0 mm/swap.c:135
 put_page include/linux/mm.h:1268 [inline]
 generic_pipe_buf_release+0xb5/0xf0 fs/pipe.c:209
 pipe_buf_release include/linux/pipe_fs_i.h:219 [inline]
 iter_file_splice_write+0x7d0/0xcb0 fs/splice.c:704
 do_splice_from fs/splice.c:767 [inline]
 direct_splice_actor+0xe9/0x120 fs/splice.c:936
 splice_direct_to_actor+0x4cb/0xb30 fs/splice.c:891
 do_splice_direct+0x1c2/0x2d0 fs/splice.c:979
 do_sendfile+0x8df/0x1040 fs/read_write.c:1257
 __do_sys_sendfile64 fs/read_write.c:1318 [inline]
 __se_sys_sendfile64 fs/read_write.c:1304 [inline]
 __x64_sys_sendfile64+0x199/0x1f0 fs/read_write.c:1304
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Memory state around the buggy address:
 ffff888111577f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888111577f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888111578000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                             ^
 ffff888111578080: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc
 ffff888111578100: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
==================================================================