System zones: 0-5
==================================================================
BUG: KASAN: slab-out-of-bounds in check_igot_inode fs/ext4/inode.c:-1 [inline]
BUG: KASAN: slab-out-of-bounds in __ext4_iget+0x2b8/0x3e40 fs/ext4/inode.c:4710
Read of size 8 at addr ffff88812b1a7ef8 by task syz.6.3908/15794

CPU: 1 PID: 15794 Comm: syz.6.3908 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:88
 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:427 [inline]
 kasan_report+0xf1/0x140 mm/kasan/report.c:444
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309
 check_igot_inode fs/ext4/inode.c:-1 [inline]
 __ext4_iget+0x2b8/0x3e40 fs/ext4/inode.c:4710
 ext4_quota_enable fs/ext4/super.c:6408 [inline]
 ext4_enable_quotas+0x33b/0x6d0 fs/ext4/super.c:6444
 ext4_fill_super+0x87c3/0x9090 fs/ext4/super.c:4951
 mount_bdev+0x2ae/0x3e0 fs/super.c:1400
 ext4_mount+0x34/0x40 fs/ext4/super.c:6623
 legacy_get_tree+0xed/0x190 fs/fs_context.c:611
 vfs_get_tree+0x89/0x260 fs/super.c:1530
 do_new_mount+0x25a/0xa20 fs/namespace.c:3034
 path_mount+0x675/0x1020 fs/namespace.c:3364
 do_mount fs/namespace.c:3377 [inline]
 __do_sys_mount fs/namespace.c:3585 [inline]
 __se_sys_mount+0x318/0x380 fs/namespace.c:3562
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3562
 x64_sys_call+0x6bf/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f75b5f1deea
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:00007f75b4962e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f75b4962ef0 RCX: 00007f75b5f1deea
RDX: 0000200000000100 RSI: 0000200000000280 RDI: 00007f75b4962eb0
RBP: 0000200000000100 R08: 00007f75b4962ef0 R09: 0000000002800000
R10: 0000000002800000 R11: 0000000000000246 R12: 0000200000000280
R13: 00007f75b4962eb0 R14: 0000000000000bb4 R15: 0000200000000380
 </TASK>

Allocated by task 418:
 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+0xbd/0xf0 mm/kasan/common.c:466
 kasan_slab_alloc include/linux/kasan.h:217 [inline]
 slab_post_alloc_hook+0x4f/0x2b0 mm/slab.h:550
 slab_alloc_node mm/slub.c:3245 [inline]
 slab_alloc mm/slub.c:3255 [inline]
 kmem_cache_alloc+0xf7/0x260 mm/slub.c:3260
 xas_alloc lib/xarray.c:374 [inline]
 xas_create+0xef8/0x1580 lib/xarray.c:676
 xas_store+0x94/0x17b0 lib/xarray.c:786
 __add_to_page_cache_locked+0x3ef/0x860 mm/filemap.c:937
 add_to_page_cache_lru+0xa7/0x210 mm/filemap.c:994
 page_cache_ra_unbounded+0x460/0x980 mm/readahead.c:233
 do_page_cache_ra mm/readahead.c:280 [inline]
 ondemand_readahead+0x8d3/0xe30 mm/readahead.c:565
 page_cache_async_ra+0x2a9/0x2e0 mm/readahead.c:624
 page_cache_async_readahead include/linux/pagemap.h:854 [inline]
 do_async_mmap_readahead mm/filemap.c:3045 [inline]
 filemap_fault+0x9af/0x1780 mm/filemap.c:3150
 __do_fault+0x264/0x2f0 mm/memory.c:4192
 do_read_fault mm/memory.c:4556 [inline]
 do_fault mm/memory.c:4697 [inline]
 handle_pte_fault+0x1a57/0x2680 mm/memory.c:4911
 __handle_mm_fault mm/memory.c:-1 [inline]
 do_handle_mm_fault+0x1a6d/0x1d50 mm/memory.c:5333
 handle_mm_fault include/linux/mm.h:1847 [inline]
 faultin_page mm/gup.c:976 [inline]
 __get_user_pages+0x7ee/0x10a0 mm/gup.c:1197
 __get_user_pages_locked mm/gup.c:1382 [inline]
 get_dump_page+0x185/0x670 mm/gup.c:1838
 dump_user_range+0x59/0x1c0 fs/coredump.c:950
 elf_core_dump+0x2ae5/0x3020 fs/binfmt_elf.c:2285
 do_coredump+0x141b/0x2860 fs/coredump.c:831
 get_signal+0x38d/0x1480 kernel/signal.c:2893
 arch_do_signal_or_restart+0xc1/0x10f0 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0xa7/0xe0 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214
 irqentry_exit_to_user_mode+0x9/0x10 kernel/entry/common.c:320
 irqentry_exit+0x12/0x40 kernel/entry/common.c:411
 exc_general_protection+0x1e4/0x270 arch/x86/kernel/traps.c:562
 asm_exc_general_protection+0x27/0x30 arch/x86/include/asm/idtentry.h:600

The buggy address belongs to the object at ffff88812b1a7c80
 which belongs to the cache radix_tree_node of size 576
The buggy address is located 56 bytes to the right of
 576-byte region [ffff88812b1a7c80, ffff88812b1a7ec0)
The buggy address belongs to the page:
page:ffffea0004ac6900 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12b1a4
head:ffffea0004ac6900 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 0000000200000001 ffff88810004cf00
raw: 0000000000000000 0000000000170017 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Reclaimable, gfp_mask 0x152810(GFP_NOWAIT|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 418, ts 28857556414, free_ts 0
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2605
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2611
 get_page_from_freelist+0x2cc5/0x2d50 mm/page_alloc.c:4485
 __alloc_pages+0x18f/0x440 mm/page_alloc.c:5808
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1937 [inline]
 new_slab+0xa1/0x4d0 mm/slub.c:2000
 ___slab_alloc+0x381/0x810 mm/slub.c:3033
 __slab_alloc+0x49/0x90 mm/slub.c:3120
 slab_alloc_node mm/slub.c:3211 [inline]
 slab_alloc mm/slub.c:3255 [inline]
 kmem_cache_alloc+0x138/0x260 mm/slub.c:3260
 xas_alloc lib/xarray.c:374 [inline]
 xas_create+0xef8/0x1580 lib/xarray.c:676
 xas_store+0x94/0x17b0 lib/xarray.c:786
 __add_to_page_cache_locked+0x3ef/0x860 mm/filemap.c:937
 add_to_page_cache_lru+0xa7/0x210 mm/filemap.c:994
 page_cache_ra_unbounded+0x460/0x980 mm/readahead.c:233
 do_page_cache_ra mm/readahead.c:280 [inline]
 ondemand_readahead+0x8d3/0xe30 mm/readahead.c:565
 page_cache_async_ra+0x2a9/0x2e0 mm/readahead.c:624
 page_cache_async_readahead include/linux/pagemap.h:854 [inline]
 do_async_mmap_readahead mm/filemap.c:3045 [inline]
 filemap_fault+0x9af/0x1780 mm/filemap.c:3150
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88812b1a7d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88812b1a7e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88812b1a7e80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
                                                                ^
 ffff88812b1a7f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88812b1a7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
EXT4-fs warning (device loop6): ext4_enable_quotas:6452: Failed to enable quota tracking (type=0, err=-13, ino=3). Please run e2fsck to fix.
EXT4-fs (loop6): mount failed