==================================================================
BUG: KASAN: use-after-free in check_igot_inode fs/ext4/inode.c:-1 [inline]
BUG: KASAN: use-after-free in __ext4_iget+0x36d/0x40e0 fs/ext4/inode.c:4787
Read of size 8 at addr ffff88811bd9abc8 by task syz.7.1506/5474

CPU: 1 PID: 5474 Comm: syz.7.1506 Not tainted 5.10.240-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x169/0x1d8 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_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309
 check_igot_inode fs/ext4/inode.c:-1 [inline]
 __ext4_iget+0x36d/0x40e0 fs/ext4/inode.c:4787
 ext4_quota_enable fs/ext4/super.c:6447 [inline]
 ext4_enable_quotas+0x33b/0x6d0 fs/ext4/super.c:6483
 ext4_fill_super+0x82a9/0x8b60 fs/ext4/super.c:5060
 mount_bdev+0x28b/0x3a0 fs/super.c:1442
 ext4_mount+0x34/0x40 fs/ext4/super.c:6662
 legacy_get_tree+0xed/0x190 fs/fs_context.c:593
 vfs_get_tree+0x89/0x260 fs/super.c:1572
 do_new_mount+0x25a/0xa20 fs/namespace.c:2919
 path_mount+0x572/0xc80 fs/namespace.c:3249
 do_mount fs/namespace.c:3262 [inline]
 __do_sys_mount fs/namespace.c:3470 [inline]
 __se_sys_mount+0x318/0x380 fs/namespace.c:3447
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3447
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f89c960238a
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:00007f89c8026e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f89c8026ef0 RCX: 00007f89c960238a
RDX: 00002000000004c0 RSI: 00002000000000c0 RDI: 00007f89c8026eb0
RBP: 00002000000004c0 R08: 00007f89c8026ef0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00002000000000c0
R13: 00007f89c8026eb0 R14: 000000000000051a R15: 00002000000001c0

Allocated by task 1823:
 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:583
 slab_alloc_node mm/slub.c:2947 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 kmem_cache_alloc+0x165/0x2e0 mm/slub.c:2960
 f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2785 [inline]
 f2fs_alloc_inode+0x26/0x410 fs/f2fs/super.c:1373
 alloc_inode fs/inode.c:233 [inline]
 iget_locked+0x146/0x7d0 fs/inode.c:1275
 f2fs_iget+0x55/0x4dc0 fs/f2fs/inode.c:498
 f2fs_fill_super+0x39f0/0x6c70 fs/f2fs/super.c:4207
 mount_bdev+0x28b/0x3a0 fs/super.c:1442
 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4562
 legacy_get_tree+0xed/0x190 fs/fs_context.c:593
 vfs_get_tree+0x89/0x260 fs/super.c:1572
 do_new_mount+0x25a/0xa20 fs/namespace.c:2919
 path_mount+0x572/0xc80 fs/namespace.c:3249
 do_mount fs/namespace.c:3262 [inline]
 __do_sys_mount fs/namespace.c:3470 [inline]
 __se_sys_mount+0x318/0x380 fs/namespace.c:3447
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3447
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Last potentially related work creation:
 kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38
 __kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348
 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
 __call_rcu kernel/rcu/tree.c:2980 [inline]
 call_rcu+0x10e/0x1050 kernel/rcu/tree.c:3054
 destroy_inode fs/inode.c:288 [inline]
 evict+0x857/0x910 fs/inode.c:629
 iput_final fs/inode.c:1736 [inline]
 iput+0x638/0x7c0 fs/inode.c:1762
 f2fs_fill_super+0x5453/0x6c70 fs/f2fs/super.c:4516
 mount_bdev+0x28b/0x3a0 fs/super.c:1442
 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4562
 legacy_get_tree+0xed/0x190 fs/fs_context.c:593
 vfs_get_tree+0x89/0x260 fs/super.c:1572
 do_new_mount+0x25a/0xa20 fs/namespace.c:2919
 path_mount+0x572/0xc80 fs/namespace.c:3249
 do_mount fs/namespace.c:3262 [inline]
 __do_sys_mount fs/namespace.c:3470 [inline]
 __se_sys_mount+0x318/0x380 fs/namespace.c:3447
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3447
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

The buggy address belongs to the object at ffff88811bd9a6a0
 which belongs to the cache f2fs_inode_cache of size 1520
The buggy address is located 1320 bytes inside of
 1520-byte region [ffff88811bd9a6a0, ffff88811bd9ac90)
The buggy address belongs to the page:
page:ffffea00046f6600 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88811bd9a030 pfn:0x11bd98
head:ffffea00046f6600 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 dead000000000100 dead000000000122 ffff8881029d2600
raw: ffff88811bd9a030 0000000080130007 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), pid 725, ts 77760760720, free_ts 75031969152
 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+0x2235/0x23d0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x268/0x5f0 mm/page_alloc.c:5357
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1808 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1869
 new_slab_objects mm/slub.c:2627 [inline]
 ___slab_alloc+0x2a6/0x450 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+0x1af/0x2e0 mm/slub.c:2960
 f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2785 [inline]
 f2fs_alloc_inode+0x26/0x410 fs/f2fs/super.c:1373
 alloc_inode fs/inode.c:233 [inline]
 iget_locked+0x146/0x7d0 fs/inode.c:1275
 f2fs_iget+0x55/0x4dc0 fs/f2fs/inode.c:498
 f2fs_fill_super+0x45ba/0x6c70 fs/f2fs/super.c:4315
 mount_bdev+0x28b/0x3a0 fs/super.c:1442
 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4562
 legacy_get_tree+0xed/0x190 fs/fs_context.c:593
 vfs_get_tree+0x89/0x260 fs/super.c:1572
 do_new_mount+0x25a/0xa20 fs/namespace.c:2919
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_pages_ok+0x7fc/0x820 mm/page_alloc.c:1629
 free_the_page mm/page_alloc.c:5418 [inline]
 __free_pages+0xdd/0x380 mm/page_alloc.c:5427
 __free_slab+0xcf/0x190 mm/slub.c:1894
 free_slab mm/slub.c:1909 [inline]
 discard_slab mm/slub.c:1915 [inline]
 unfreeze_partials+0x15f/0x190 mm/slub.c:2410
 put_cpu_partial+0xc1/0x180 mm/slub.c:2446
 __slab_free+0x2c9/0x3a0 mm/slub.c:3095
 do_slab_free mm/slub.c:3191 [inline]
 ___cache_free+0x111/0x130 mm/slub.c:3210
 qlink_free+0x50/0x90 mm/kasan/quarantine.c:157
 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x14a/0x160 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xf0 mm/kasan/common.c:440
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:583
 slab_alloc_node mm/slub.c:2947 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 kmem_cache_alloc+0x165/0x2e0 mm/slub.c:2960
 anon_vma_chain_alloc mm/rmap.c:138 [inline]
 __anon_vma_prepare+0x51/0x420 mm/rmap.c:192
 anon_vma_prepare include/linux/rmap.h:171 [inline]
 do_anonymous_page mm/memory.c:3961 [inline]
 handle_pte_fault+0x2f1e/0x3750 mm/memory.c:4786
 __handle_mm_fault mm/memory.c:4944 [inline]
 handle_mm_fault+0xf3f/0x16a0 mm/memory.c:5358

Memory state around the buggy address:
 ffff88811bd9aa80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811bd9ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88811bd9ab80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                              ^
 ffff88811bd9ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811bd9ac80: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
EXT4-fs warning (device loop7): ext4_enable_quotas:6491: Failed to enable quota tracking (type=0, err=-13, ino=3). Please run e2fsck to fix.
EXT4-fs (loop7): mount failed