==================================================================
BUG: KASAN: slab-out-of-bounds in __ext4_iget+0x2ee/0x3ef0 fs/ext4/inode.c:4683
Read of size 8 at addr ffff88814145fef8 by task syz.8.4894/24493

CPU: 0 PID: 24493 Comm: syz.8.4894 Not tainted 5.15.167-syzkaller-00002-g3bfe08931bff #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1c0 lib/dump_stack.c:106
 print_address_description+0x87/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:427 [inline]
 kasan_report+0x179/0x1c0 mm/kasan/report.c:444
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309
 __ext4_iget+0x2ee/0x3ef0 fs/ext4/inode.c:4683
 ext4_quota_enable fs/ext4/super.c:6378 [inline]
 ext4_enable_quotas+0x556/0x980 fs/ext4/super.c:6414
 ext4_fill_super+0x8b95/0x96e0 fs/ext4/super.c:4950
 mount_bdev+0x282/0x3b0 fs/super.c:1398
 ext4_mount+0x34/0x40 fs/ext4/super.c:6593
 legacy_get_tree+0xf1/0x190 fs/fs_context.c:611
 vfs_get_tree+0x88/0x290 fs/super.c:1528
 do_new_mount+0x2ba/0xb30 fs/namespace.c:3005
 path_mount+0x671/0x1070 fs/namespace.c:3335
 do_mount fs/namespace.c:3348 [inline]
 __do_sys_mount fs/namespace.c:3556 [inline]
 __se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3533
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3533
 x64_sys_call+0x49d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f7d6249deba
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:00007f7d61114e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f7d61114ef0 RCX: 00007f7d6249deba
RDX: 0000000020000100 RSI: 0000000020000080 RDI: 00007f7d61114eb0
RBP: 0000000020000100 R08: 00007f7d61114ef0 R09: 0000000003000010
R10: 0000000003000010 R11: 0000000000000246 R12: 0000000020000080
R13: 00007f7d61114eb0 R14: 000000000000052c R15: 0000000020000000
 </TASK>

Allocated by task 64:
 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:433 [inline]
 __kasan_slab_alloc+0xb1/0xe0 mm/kasan/common.c:466
 kasan_slab_alloc include/linux/kasan.h:217 [inline]
 slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550
 slab_alloc_node mm/slub.c:3240 [inline]
 slab_alloc mm/slub.c:3248 [inline]
 kmem_cache_alloc+0xf5/0x200 mm/slub.c:3253
 kmem_cache_zalloc include/linux/slab.h:723 [inline]
 alloc_buffer_head+0x26/0x110 fs/buffer.c:3311
 alloc_page_buffers+0x192/0x390 fs/buffer.c:832
 grow_dev_page fs/buffer.c:968 [inline]
 grow_buffers fs/buffer.c:1014 [inline]
 __getblk_slow fs/buffer.c:1041 [inline]
 __getblk_gfp+0x3ed/0x7c0 fs/buffer.c:1336
 __getblk include/linux/buffer_head.h:416 [inline]
 jbd2_journal_get_descriptor_buffer+0x158/0x420 fs/jbd2/journal.c:1023
 jbd2_journal_commit_transaction+0x1629/0x6170 fs/jbd2/commit.c:646
 kjournald2+0x489/0x890 fs/jbd2/journal.c:213
 kthread+0x421/0x510 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287

The buggy address belongs to the object at ffff88814145fe70
 which belongs to the cache buffer_head of size 104
The buggy address is located 32 bytes to the right of
 104-byte region [ffff88814145fe70, ffff88814145fed8)
The buggy address belongs to the page:
page:ffffea00050517c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88814145fd20 pfn:0x14145f
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 ffffea0004c978c8 ffffea000449f388 ffff8881001cca80
raw: ffff88814145fd20 000000000018000f 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Reclaimable, gfp_mask 0x112c50(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 6607, ts 487292088560, free_ts 486882434452
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2605
 prep_new_page+0x1b/0x110 mm/page_alloc.c:2611
 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4485
 __alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5779
 allocate_slab mm/slub.c:1932 [inline]
 new_slab+0x9a/0x4e0 mm/slub.c:1995
 ___slab_alloc+0x39e/0x830 mm/slub.c:3028
 __slab_alloc+0x4a/0x90 mm/slub.c:3115
 slab_alloc_node mm/slub.c:3206 [inline]
 slab_alloc mm/slub.c:3248 [inline]
 kmem_cache_alloc+0x134/0x200 mm/slub.c:3253
 kmem_cache_zalloc include/linux/slab.h:723 [inline]
 alloc_buffer_head+0x26/0x110 fs/buffer.c:3311
 alloc_page_buffers+0x192/0x390 fs/buffer.c:832
 grow_dev_page fs/buffer.c:968 [inline]
 grow_buffers fs/buffer.c:1014 [inline]
 __getblk_slow fs/buffer.c:1041 [inline]
 __getblk_gfp+0x3ed/0x7c0 fs/buffer.c:1336
 sb_getblk include/linux/buffer_head.h:361 [inline]
 ext4_get_branch+0x309/0x750 fs/ext4/indirect.c:166
 ext4_ind_map_blocks+0x29f/0x2830 fs/ext4/indirect.c:554
 ext4_map_blocks+0x3ed/0x1c70 fs/ext4/inode.c:602
 _ext4_get_block+0x23b/0x660 fs/ext4/inode.c:816
 ext4_get_block fs/ext4/inode.c:833 [inline]
 __ext4_block_zero_page_range fs/ext4/inode.c:3780 [inline]
 ext4_block_zero_page_range+0x3b0/0x970 fs/ext4/inode.c:3859
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1472 [inline]
 free_pcp_prepare mm/page_alloc.c:1544 [inline]
 free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3534
 free_unref_page+0xe8/0x750 mm/page_alloc.c:3616
 free_the_page mm/page_alloc.c:805 [inline]
 __free_pages+0x61/0xf0 mm/page_alloc.c:5855
 __free_slab+0xec/0x1d0 mm/slub.c:2020
 free_slab mm/slub.c:2035 [inline]
 discard_slab mm/slub.c:2041 [inline]
 __unfreeze_partials+0x165/0x1a0 mm/slub.c:2527
 put_cpu_partial+0xc4/0x120 mm/slub.c:2607
 __slab_free+0x1c8/0x290 mm/slub.c:3388
 do_slab_free mm/slub.c:3507 [inline]
 ___cache_free+0x109/0x120 mm/slub.c:3526
 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157
 qlist_free_all+0x44/0xb0 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:443
 kasan_slab_alloc include/linux/kasan.h:217 [inline]
 slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550
 slab_alloc_node mm/slub.c:3240 [inline]
 slab_alloc mm/slub.c:3248 [inline]
 kmem_cache_alloc+0xf5/0x200 mm/slub.c:3253
 getname_flags+0xba/0x520 fs/namei.c:138
 user_path_at_empty+0x2d/0x1a0 fs/namei.c:2882

Memory state around the buggy address:
 ffff88814145fd80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00
 ffff88814145fe00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 00
>ffff88814145fe80: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc
                                                                ^
 ffff88814145ff00: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88814145ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
EXT4-fs warning (device loop8): ext4_enable_quotas:6422: Failed to enable quota tracking (type=0, err=-13, ino=3). Please run e2fsck to fix.
EXT4-fs (loop8): mount failed