==================================================================
BUG: KASAN: use-after-free in __ext4_iget+0x3a0/0x41f0 fs/ext4/inode.c:4766
Read of size 8 at addr ffff88812b27c588 by task syz.6.3654/14859

CPU: 1 PID: 14859 Comm: syz.6.3654 Not tainted 5.10.234-syzkaller-00023-g3f5f2283d684 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118
 print_address_description+0x81/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x179/0x1c0 mm/kasan/report.c:452
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309
 __ext4_iget+0x3a0/0x41f0 fs/ext4/inode.c:4766
 ext4_quota_enable fs/ext4/super.c:6423 [inline]
 ext4_enable_quotas+0x56f/0x9f0 fs/ext4/super.c:6459
 ext4_fill_super+0x86dc/0x9150 fs/ext4/super.c:5060
 mount_bdev+0x262/0x370 fs/super.c:1442
 ext4_mount+0x34/0x40 fs/ext4/super.c:6638
 legacy_get_tree+0xf1/0x190 fs/fs_context.c:593
 vfs_get_tree+0x88/0x290 fs/super.c:1572
 do_new_mount+0x2ba/0xb30 fs/namespace.c:2917
 path_mount+0x56f/0xcb0 fs/namespace.c:3247
 do_mount fs/namespace.c:3260 [inline]
 __do_sys_mount fs/namespace.c:3468 [inline]
 __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3445
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3445
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f4dc99a590a
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:00007f4dc800de68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f4dc800def0 RCX: 00007f4dc99a590a
RDX: 00004000000004c0 RSI: 0000400000000040 RDI: 00007f4dc800deb0
RBP: 00004000000004c0 R08: 00007f4dc800def0 R09: 0000000000014000
R10: 0000000000014000 R11: 0000000000000246 R12: 0000400000000040
R13: 00007f4dc800deb0 R14: 00000000000004d5 R15: 000000000000002c

Allocated by task 7333:
 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+0xb1/0xe0 mm/kasan/common.c:463
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x61/0x2f0 mm/slab.h:583
 slab_alloc_node mm/slub.c:2947 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 kmem_cache_alloc+0x168/0x2e0 mm/slub.c:2960
 f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2779 [inline]
 f2fs_alloc_inode+0x26/0x420 fs/f2fs/super.c:1373
 alloc_inode fs/inode.c:233 [inline]
 new_inode_pseudo+0x64/0x220 fs/inode.c:968
 new_inode+0x28/0x1c0 fs/inode.c:997
 f2fs_new_inode+0x126/0x14d0 fs/f2fs/namei.c:35
 __f2fs_tmpfile+0x109/0x4c0 fs/f2fs/namei.c:853
 f2fs_tmpfile+0x148/0x520 fs/f2fs/namei.c:916
 vfs_tmpfile+0x1e4/0x2b0 fs/namei.c:3424
 ovl_do_tmpfile fs/overlayfs/overlayfs.h:236 [inline]
 ovl_make_workdir fs/overlayfs/super.c:1347 [inline]
 ovl_get_workdir+0x562/0xe60 fs/overlayfs/super.c:1458
 ovl_fill_super+0x1968/0x26d0 fs/overlayfs/super.c:1998
 mount_nodev+0x57/0xf0 fs/super.c:1488
 ovl_mount+0x2c/0x40 fs/overlayfs/super.c:2082
 legacy_get_tree+0xf1/0x190 fs/fs_context.c:593
 vfs_get_tree+0x88/0x290 fs/super.c:1572
 do_new_mount+0x2ba/0xb30 fs/namespace.c:2917
 path_mount+0x56f/0xcb0 fs/namespace.c:3247
 do_mount fs/namespace.c:3260 [inline]
 __do_sys_mount fs/namespace.c:3468 [inline]
 __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3445
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3445
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Last potentially related work creation:
 kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38
 __kasan_record_aux_stack+0xd3/0x100 mm/kasan/generic.c:348
 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
 __call_rcu kernel/rcu/tree.c:2976 [inline]
 call_rcu+0x135/0x11f0 kernel/rcu/tree.c:3050
 destroy_inode fs/inode.c:288 [inline]
 evict+0x8e8/0x9c0 fs/inode.c:629
 iput_final fs/inode.c:1736 [inline]
 iput+0x632/0x7e0 fs/inode.c:1762
 dentry_unlink_inode+0x2ea/0x3d0 fs/dcache.c:378
 __dentry_kill+0x447/0x650 fs/dcache.c:583
 dentry_kill+0xc0/0x2a0
 dput+0x40/0x80 fs/dcache.c:883
 ovl_make_workdir fs/overlayfs/super.c:1350 [inline]
 ovl_get_workdir+0x5ad/0xe60 fs/overlayfs/super.c:1458
 ovl_fill_super+0x1968/0x26d0 fs/overlayfs/super.c:1998
 mount_nodev+0x57/0xf0 fs/super.c:1488
 ovl_mount+0x2c/0x40 fs/overlayfs/super.c:2082
 legacy_get_tree+0xf1/0x190 fs/fs_context.c:593
 vfs_get_tree+0x88/0x290 fs/super.c:1572
 do_new_mount+0x2ba/0xb30 fs/namespace.c:2917
 path_mount+0x56f/0xcb0 fs/namespace.c:3247
 do_mount fs/namespace.c:3260 [inline]
 __do_sys_mount fs/namespace.c:3468 [inline]
 __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3445
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3445
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Second to last potentially related work creation:
 kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38
 __kasan_record_aux_stack+0xd3/0x100 mm/kasan/generic.c:348
 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
 __call_rcu kernel/rcu/tree.c:2976 [inline]
 call_rcu+0x135/0x11f0 kernel/rcu/tree.c:3050
 destroy_inode fs/inode.c:288 [inline]
 evict+0x8e8/0x9c0 fs/inode.c:629
 iput_final fs/inode.c:1736 [inline]
 iput+0x632/0x7e0 fs/inode.c:1762
 dentry_unlink_inode+0x2ea/0x3d0 fs/dcache.c:378
 __dentry_kill+0x447/0x650 fs/dcache.c:583
 dentry_kill+0xc0/0x2a0
 dput+0x40/0x80 fs/dcache.c:883
 ovl_check_rename_whiteout fs/overlayfs/super.c:1254 [inline]
 ovl_make_workdir fs/overlayfs/super.c:1356 [inline]
 ovl_get_workdir+0x845/0xe60 fs/overlayfs/super.c:1458
 ovl_fill_super+0x1968/0x26d0 fs/overlayfs/super.c:1998
 mount_nodev+0x57/0xf0 fs/super.c:1488
 ovl_mount+0x2c/0x40 fs/overlayfs/super.c:2082
 legacy_get_tree+0xf1/0x190 fs/fs_context.c:593
 vfs_get_tree+0x88/0x290 fs/super.c:1572
 do_new_mount+0x2ba/0xb30 fs/namespace.c:2917
 path_mount+0x56f/0xcb0 fs/namespace.c:3247
 do_mount fs/namespace.c:3260 [inline]
 __do_sys_mount fs/namespace.c:3468 [inline]
 __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3445
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3445
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

The buggy address belongs to the object at ffff88812b27c060
 which belongs to the cache f2fs_inode_cache of size 1520
The buggy address is located 1320 bytes inside of
 1520-byte region [ffff88812b27c060, ffff88812b27c650)
The buggy address belongs to the page:
page:ffffea0004ac9e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88812b27cd40 pfn:0x12b278
head:ffffea0004ac9e00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head)
raw: 4000000000010200 0000000000000000 0000000100000001 ffff888102794c00
raw: ffff88812b27cd40 0000000080130001 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 1112, ts 58019440635, free_ts 28007364535
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x166/0x180 mm/page_alloc.c:2462
 get_page_from_freelist+0x2d8c/0x2f30 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x435/0xaf0 mm/page_alloc.c:5348
 allocate_slab mm/slub.c:1808 [inline]
 new_slab+0x80/0x400 mm/slub.c:1869
 new_slab_objects mm/slub.c:2627 [inline]
 ___slab_alloc+0x302/0x4b0 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+0x1b9/0x2e0 mm/slub.c:2960
 f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2779 [inline]
 f2fs_alloc_inode+0x26/0x420 fs/f2fs/super.c:1373
 alloc_inode fs/inode.c:233 [inline]
 iget_locked+0x14f/0x870 fs/inode.c:1275
 f2fs_iget+0x55/0x50a0 fs/f2fs/inode.c:498
 f2fs_fill_super+0x4c57/0x7d90 fs/f2fs/super.c:4193
 mount_bdev+0x262/0x370 fs/super.c:1442
 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4548
 legacy_get_tree+0xf1/0x190 fs/fs_context.c:593
 vfs_get_tree+0x88/0x290 fs/super.c:1572
 do_new_mount+0x2ba/0xb30 fs/namespace.c:2917
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+0x82c/0x850 mm/page_alloc.c:1629
 free_the_page+0x76/0x370 mm/page_alloc.c:5409
 __free_pages+0x67/0xc0 mm/page_alloc.c:5418
 kfree+0x1f0/0x270 mm/slub.c:4188
 skb_free_head net/core/skbuff.c:606 [inline]
 skb_release_data+0x5c6/0x6f0 net/core/skbuff.c:626
 skb_release_all net/core/skbuff.c:680 [inline]
 __kfree_skb net/core/skbuff.c:694 [inline]
 kfree_skb+0xb9/0x320 net/core/skbuff.c:713
 skb_expand_head+0x171/0x1e0
 ip6_xmit+0xd3d/0x1440 net/ipv6/ip6_output.c:277
 inet6_csk_xmit+0x267/0x370 net/ipv6/inet6_connection_sock.c:135
 l2tp_xmit_queue net/l2tp/l2tp_core.c:1009 [inline]
 l2tp_xmit_core net/l2tp/l2tp_core.c:1104 [inline]
 l2tp_xmit_skb+0xede/0x1890 net/l2tp/l2tp_core.c:1120
 pppol2tp_sendmsg+0x367/0x5b0 net/l2tp/l2tp_ppp.c:319
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 sock_write_iter+0x39b/0x530 net/socket.c:1018
 do_iter_readv_writev+0x58e/0x790
 do_iter_write+0x183/0x640 fs/read_write.c:866
 vfs_writev+0x26e/0x510 fs/read_write.c:939
 do_writev+0x1aa/0x340 fs/read_write.c:982

Memory state around the buggy address:
 ffff88812b27c480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88812b27c500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88812b27c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff88812b27c600: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc
 ffff88812b27c680: fc fc fc fc fc fc fc fc fc fc 00 00 00 00 00 00
==================================================================
EXT4-fs warning (device loop6): ext4_enable_quotas:6467: Failed to enable quota tracking (type=0, err=-13, ino=3). Please run e2fsck to fix.
EXT4-fs (loop6): mount failed