==================================================================
BUG: KASAN: use-after-free in check_igot_inode fs/ext4/inode.c:4953 [inline]
BUG: KASAN: use-after-free in __ext4_iget+0x384/0x4330 fs/ext4/inode.c:5001
Read of size 8 at addr ffff8881cfb93040 by task syz.9.740/3311

CPU: 1 PID: 3311 Comm: syz.9.740 Not tainted 5.4.290-syzkaller-00001-g986c38813dff #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d8/0x241 lib/dump_stack.c:118
 print_address_description+0x8c/0x600 mm/kasan/report.c:384
 __kasan_report+0xf3/0x120 mm/kasan/report.c:516
 kasan_report+0x30/0x60 mm/kasan/common.c:653
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:132
 check_igot_inode fs/ext4/inode.c:4953 [inline]
 __ext4_iget+0x384/0x4330 fs/ext4/inode.c:5001
 ext4_quota_enable fs/ext4/super.c:6056 [inline]
 ext4_enable_quotas+0x528/0x940 fs/ext4/super.c:6092
 ext4_fill_super+0x84f0/0x8d90 fs/ext4/super.c:4708
 mount_bdev+0x273/0x380 fs/super.c:1428
 ext4_mount+0x34/0x40 fs/ext4/super.c:6279
 legacy_get_tree+0xee/0x190 fs/fs_context.c:648
 vfs_get_tree+0x88/0x290 fs/super.c:1558
 do_new_mount+0x292/0x570 fs/namespace.c:2850
 do_mount+0x688/0xe10 fs/namespace.c:3170
 ksys_mount+0xcc/0x100 fs/namespace.c:3379
 __do_sys_mount fs/namespace.c:3393 [inline]
 __se_sys_mount fs/namespace.c:3390 [inline]
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3390
 do_syscall_64+0xd8/0x170 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f2087be790a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f208624ee68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f208624eef0 RCX: 00007f2087be790a
RDX: 00002000000000c0 RSI: 0000200000000640 RDI: 00007f208624eeb0
RBP: 00002000000000c0 R08: 00007f208624eef0 R09: 0000000003000010
R10: 0000000003000010 R11: 0000000000000246 R12: 0000200000000640
R13: 00007f208624eeb0 R14: 000000000000051b R15: 0000200000000000

Allocated by task 2925:
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 __kasan_kmalloc+0x171/0x210 mm/kasan/common.c:529
 kasan_slab_alloc+0xe/0x10 mm/kasan/common.c:537
 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+0xe0/0x260 mm/slub.c:2842
 f2fs_alloc_inode+0x26/0x3c0 fs/f2fs/super.c:1241
 alloc_inode fs/inode.c:231 [inline]
 new_inode_pseudo+0x64/0x220 fs/inode.c:966
 new_inode+0x28/0x1c0 fs/inode.c:995
 f2fs_new_inode+0x11a/0x1470 fs/f2fs/namei.c:35
 f2fs_create+0x16e/0x12f0 fs/f2fs/namei.c:342
 lookup_open fs/namei.c:3379 [inline]
 do_last fs/namei.c:3471 [inline]
 path_openat+0x184a/0x34b0 fs/namei.c:3683
 do_filp_open+0x20b/0x450 fs/namei.c:3713
 do_sys_open+0x39c/0x810 fs/open.c:1123
 __do_sys_openat fs/open.c:1150 [inline]
 __se_sys_openat fs/open.c:1144 [inline]
 __x64_sys_openat+0xa2/0xb0 fs/open.c:1144
 do_syscall_64+0xd8/0x170 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Freed by task 0:
 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+0x1b5/0x270 mm/kasan/common.c:487
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:496
 slab_free_hook mm/slub.c:1455 [inline]
 slab_free_freelist_hook mm/slub.c:1494 [inline]
 slab_free mm/slub.c:3080 [inline]
 kmem_cache_free+0x1a0/0x410 mm/slub.c:3096
 f2fs_free_inode+0x24/0x30 fs/f2fs/super.c:1397
 i_callback+0x4b/0x70 fs/inode.c:220
 __rcu_reclaim kernel/rcu/rcu.h:222 [inline]
 rcu_do_batch+0x492/0xa00 kernel/rcu/tree.c:2167
 rcu_core+0x4c8/0xcb0 kernel/rcu/tree.c:2387
 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2396
 __do_softirq+0x24a/0x687 kernel/softirq.c:292

The buggy address belongs to the object at ffff8881cfb92b80
 which belongs to the cache f2fs_inode_cache of size 1264
The buggy address is located 1216 bytes inside of
 1264-byte region [ffff8881cfb92b80, ffff8881cfb93070)
The buggy address belongs to the page:
page:ffffea00073ee400 refcount:1 mapcount:0 mapping:ffff8881f0ffcf00 index:0xffff8881cfb946b0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f0ffcf00
raw: ffff8881cfb946b0 0000000080170011 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE)
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook mm/page_alloc.c:2165 [inline]
 prep_new_page+0x192/0x370 mm/page_alloc.c:2171
 get_page_from_freelist+0x2d13/0x2d90 mm/page_alloc.c:3794
 __alloc_pages_nodemask+0x393/0x840 mm/page_alloc.c:4893
 alloc_slab_page+0x3b/0x400 mm/slub.c:343
 allocate_slab mm/slub.c:1683 [inline]
 new_slab+0x98/0x430 mm/slub.c:1749
 new_slab_objects mm/slub.c:2505 [inline]
 ___slab_alloc+0x2e0/0x460 mm/slub.c:2667
 __slab_alloc+0x63/0xa0 mm/slub.c:2707
 slab_alloc_node mm/slub.c:2792 [inline]
 slab_alloc mm/slub.c:2837 [inline]
 kmem_cache_alloc+0x12a/0x260 mm/slub.c:2842
 f2fs_alloc_inode+0x26/0x3c0 fs/f2fs/super.c:1241
 alloc_inode fs/inode.c:231 [inline]
 iget_locked+0x14f/0x850 fs/inode.c:1273
 f2fs_iget+0x55/0x4c50 fs/f2fs/inode.c:499
 f2fs_fill_super+0x4d1b/0x8330 fs/f2fs/super.c:3963
 mount_bdev+0x273/0x380 fs/super.c:1428
 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4316
 legacy_get_tree+0xee/0x190 fs/fs_context.c:648
 vfs_get_tree+0x88/0x290 fs/super.c:1558
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1176 [inline]
 free_pcp_prepare mm/page_alloc.c:1233 [inline]
 free_unref_page_prepare+0x2a3/0x390 mm/page_alloc.c:3085
 free_unref_page_list+0x10a/0x590 mm/page_alloc.c:3154
 release_pages+0xad8/0xb20 mm/swap.c:842
 __pagevec_release+0xc7/0x150 mm/swap.c:862
 pagevec_release include/linux/pagevec.h:88 [inline]
 shmem_undo_range+0x8a5/0x1ad0 mm/shmem.c:875
 shmem_truncate_range mm/shmem.c:997 [inline]
 shmem_evict_inode+0x218/0x9a0 mm/shmem.c:1097
 evict+0x4ea/0x960 fs/inode.c:610
 iput_final fs/inode.c:1652 [inline]
 iput+0x68f/0x810 fs/inode.c:1678
 dentry_unlink_inode+0x2e5/0x3d0 fs/dcache.c:378
 __dentry_kill+0x437/0x640 fs/dcache.c:583
 dentry_kill+0xc0/0x2a0 fs/dcache.c:677
 dput+0x40/0x80 fs/dcache.c:864
 __fput+0x465/0x6c0 fs/file_table.c:294
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x146/0x170 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0xcaf/0x2bc0 kernel/exit.c:861

Memory state around the buggy address:
 ffff8881cfb92f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881cfb92f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881cfb93000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
                                           ^
 ffff8881cfb93080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
 ffff8881cfb93100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
EXT4-fs warning (device loop9): ext4_enable_quotas:6100: Failed to enable quota tracking (type=0, err=-13, ino=3). Please run e2fsck to fix.
EXT4-fs (loop9): mount failed