==================================================================
BUG: KASAN: use-after-free in check_igot_inode fs/ext4/inode.c:4953 [inline]
BUG: KASAN: use-after-free in __ext4_iget+0x3ac/0x40d0 fs/ext4/inode.c:5001
Read of size 8 at addr ffff8881dd256c10 by task syz.8.2188/8857

CPU: 0 PID: 8857 Comm: syz.8.2188 Not tainted 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 __dump_stack+0x1e/0x20 lib/dump_stack.c:77
 dump_stack+0x15b/0x1b8 lib/dump_stack.c:118
 print_address_description+0x8d/0x4c0 mm/kasan/report.c:384
 __kasan_report+0xef/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+0x3ac/0x40d0 fs/ext4/inode.c:5001
 ext4_quota_enable fs/ext4/super.c:6056 [inline]
 ext4_enable_quotas+0x33b/0x6c0 fs/ext4/super.c:6092
 ext4_fill_super+0x7f7c/0x8670 fs/ext4/super.c:4708
 mount_bdev+0x279/0x390 fs/super.c:1428
 ext4_mount+0x34/0x40 fs/ext4/super.c:6279
 legacy_get_tree+0xea/0x190 fs/fs_context.c:648
 vfs_get_tree+0x89/0x260 fs/super.c:1558
 do_new_mount+0x234/0x480 fs/namespace.c:2850
 do_mount+0x63a/0xd40 fs/namespace.c:3170
 ksys_mount+0xc5/0x100 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+0xcf/0x170 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f5a4189b10a
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:00007f5a3febfe68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f5a3febfef0 RCX: 00007f5a4189b10a
RDX: 0000200000000140 RSI: 0000200000000480 RDI: 00007f5a3febfeb0
RBP: 0000200000000140 R08: 00007f5a3febfef0 R09: 0000000000000004
R10: 0000000000000004 R11: 0000000000000246 R12: 0000200000000480
R13: 00007f5a3febfeb0 R14: 00000000000005fd R15: 00002000000002c0

Allocated by task 4118:
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 __kasan_kmalloc+0x162/0x200 mm/kasan/common.c:529
 kasan_slab_alloc+0x12/0x20 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+0xe2/0x270 mm/slub.c:2842
 f2fs_alloc_inode+0x26/0x3b0 fs/f2fs/super.c:1241
 alloc_inode fs/inode.c:231 [inline]
 new_inode_pseudo+0x62/0x210 fs/inode.c:966
 new_inode+0x28/0x1e0 fs/inode.c:995
 f2fs_new_inode+0xd0/0x1410 fs/f2fs/namei.c:35
 f2fs_mkdir+0x126/0x530 fs/f2fs/namei.c:743
 vfs_mkdir+0x4c7/0x6a0 fs/namei.c:3965
 do_mkdirat+0x14c/0x340 fs/namei.c:3987
 __do_sys_mkdirat fs/namei.c:3998 [inline]
 __se_sys_mkdirat fs/namei.c:3996 [inline]
 __x64_sys_mkdirat+0x7b/0x90 fs/namei.c:3996
 do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Freed by task 17:
 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+0x1c3/0x280 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+0xb7/0x180 mm/slub.c:1494
 slab_free mm/slub.c:3080 [inline]
 kmem_cache_free+0x10c/0x2c0 mm/slub.c:3096
 f2fs_free_inode+0x24/0x30 fs/f2fs/super.c:1397
 i_callback+0x4c/0x70 fs/inode.c:220
 __rcu_reclaim kernel/rcu/rcu.h:222 [inline]
 rcu_do_batch+0x446/0x980 kernel/rcu/tree.c:2167
 rcu_core+0x4bd/0xbd0 kernel/rcu/tree.c:2387
 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2396
 __do_softirq+0x236/0x660 kernel/softirq.c:292

The buggy address belongs to the object at ffff8881dd256750
 which belongs to the cache f2fs_inode_cache of size 1264
The buggy address is located 1216 bytes inside of
 1264-byte region [ffff8881dd256750, ffff8881dd256c40)
The buggy address belongs to the page:
page:ffffea0007749400 refcount:1 mapcount:0 mapping:ffff8881f0844f00 index:0xffff8881dd2577a0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f0844f00
raw: ffff8881dd2577a0 000000008017000a 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+0x35e/0x370 mm/page_alloc.c:2171
 get_page_from_freelist+0x1296/0x1310 mm/page_alloc.c:3794
 __alloc_pages_nodemask+0x202/0x4b0 mm/page_alloc.c:4894
 alloc_slab_page+0x3c/0x3b0 mm/slub.c:343
 allocate_slab mm/slub.c:1683 [inline]
 new_slab+0x93/0x420 mm/slub.c:1749
 new_slab_objects mm/slub.c:2505 [inline]
 ___slab_alloc+0x29e/0x420 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+0x12c/0x270 mm/slub.c:2842
 f2fs_alloc_inode+0x26/0x3b0 fs/f2fs/super.c:1241
 alloc_inode fs/inode.c:231 [inline]
 iget_locked+0x144/0x810 fs/inode.c:1273
 f2fs_iget+0x55/0x4ac0 fs/f2fs/inode.c:499
 f2fs_fill_super+0x44fc/0x7760 fs/f2fs/super.c:3963
 mount_bdev+0x279/0x390 fs/super.c:1428
 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4316
 legacy_get_tree+0xea/0x190 fs/fs_context.c:648
 vfs_get_tree+0x89/0x260 fs/super.c:1558
page_owner free stack trace missing

Memory state around the buggy address:
 ffff8881dd256b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881dd256b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881dd256c00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
                         ^
 ffff8881dd256c80: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00
 ffff8881dd256d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
EXT4-fs warning (device loop8): ext4_enable_quotas:6100: Failed to enable quota tracking (type=0, err=-13, ino=3). Please run e2fsck to fix.
EXT4-fs (loop8): mount failed
netlink: 24 bytes leftover after parsing attributes in process `syz.8.2188'.