==================================================================
BUG: KASAN: slab-out-of-bounds in check_igot_inode fs/ext4/inode.c:4953 [inline]
BUG: KASAN: slab-out-of-bounds in __ext4_iget+0x3ac/0x40d0 fs/ext4/inode.c:5001
Read of size 8 at addr ffff8881cfb6d650 by task syz.1.1144/5157

CPU: 0 PID: 5157 Comm: syz.1.1144 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: 0033:0x7f05c256510a
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:00007f05c0b89e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f05c0b89ef0 RCX: 00007f05c256510a
RDX: 0000200000000140 RSI: 0000200000000480 RDI: 00007f05c0b89eb0
RBP: 0000200000000140 R08: 00007f05c0b89ef0 R09: 0000000000000004
R10: 0000000000000004 R11: 0000000000000246 R12: 0000200000000480
R13: 00007f05c0b89eb0 R14: 00000000000005fd R15: 00002000000002c0

Allocated by task 0:
(stack is not available)

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8881cfb6d190
 which belongs to the cache f2fs_inode_cache of size 1264
The buggy address is located 1216 bytes inside of
 1264-byte region [ffff8881cfb6d190, ffff8881cfb6d680)
The buggy address belongs to the page:
page:ffffea00073eda00 refcount:1 mapcount:0 mapping:ffff8881f082ef00 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f082ef00
raw: 0000000000000000 0000000080170017 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]
 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_symlink+0x295/0x860 fs/f2fs/namei.c:673
 vfs_symlink+0x337/0x4c0 fs/namei.c:4276
 do_symlinkat+0x103/0x3b0 fs/namei.c:4303
 __do_sys_symlinkat fs/namei.c:4317 [inline]
 __se_sys_symlinkat fs/namei.c:4314 [inline]
 __x64_sys_symlinkat+0x7b/0x90 fs/namei.c:4314
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+0x2a9/0x3a0 mm/page_alloc.c:3085
 free_unref_page mm/page_alloc.c:3134 [inline]
 free_the_page mm/page_alloc.c:4954 [inline]
 __free_pages+0xaa/0x110 mm/page_alloc.c:4962
 __free_slab+0x218/0x2d0 mm/slub.c:1774
 free_slab mm/slub.c:1789 [inline]
 discard_slab mm/slub.c:1795 [inline]
 unfreeze_partials+0x165/0x1a0 mm/slub.c:2288
 put_cpu_partial+0xc1/0x180 mm/slub.c:2324
 __slab_free+0x2be/0x380 mm/slub.c:2971
 do_slab_free mm/slub.c:3068 [inline]
 ___cache_free+0xbb/0xd0 mm/slub.c:3087
 qlink_free+0x23/0x30 mm/kasan/quarantine.c:148
 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:167
 quarantine_reduce+0x1a8/0x200 mm/kasan/quarantine.c:260
 __kasan_kmalloc+0x42/0x200 mm/kasan/common.c:507
 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
 getname_flags+0xb9/0x500 fs/namei.c:141
 user_path_at_empty+0x2f/0x50 fs/namei.c:2703
 user_path_at include/linux/namei.h:49 [inline]
 inotify_find_inode fs/notify/inotify/inotify_user.c:340 [inline]
 __do_sys_inotify_add_watch fs/notify/inotify/inotify_user.c:747 [inline]
 __se_sys_inotify_add_watch+0x1a8/0x9e0 fs/notify/inotify/inotify_user.c:698

Memory state around the buggy address:
 ffff8881cfb6d500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881cfb6d580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881cfb6d600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                 ^
 ffff8881cfb6d680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881cfb6d700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
EXT4-fs warning (device loop1): ext4_enable_quotas:6100: Failed to enable quota tracking (type=0, err=-13, ino=3). Please run e2fsck to fix.
EXT4-fs (loop1): mount failed