XFS (loop1): Quotacheck: Done.
==================================================================
BUG: KASAN: stack-out-of-bounds in __lock_acquire+0x77/0x1fd0 kernel/locking/lockdep.c:5005
Read of size 8 at addr ffffc90014bb7898 by task syz-executor.1/13029

CPU: 1 PID: 13029 Comm: syz-executor.1 Not tainted 6.8.0-rc7-syzkaller-00017-g29cd507cbec2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x167/0x540 mm/kasan/report.c:488
 kasan_report+0x142/0x180 mm/kasan/report.c:601
 __lock_acquire+0x77/0x1fd0 kernel/locking/lockdep.c:5005
 lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
 down+0x39/0xc0 kernel/locking/semaphore.c:59
 xfs_buf_lock+0x154/0x4c0 fs/xfs/xfs_buf.c:1126
 xfs_buf_delwri_submit_buffers+0x14f/0x960 fs/xfs/xfs_buf.c:2210
 xfs_buf_delwri_submit+0xba/0x270 fs/xfs/xfs_buf.c:2288
 xfs_qm_shrink_scan+0x1ee/0x400 fs/xfs/xfs_qm.c:521
 do_shrink_slab+0x6d0/0x1140 mm/shrinker.c:435
 shrink_slab+0x1092/0x14d0 mm/shrinker.c:662
 drop_slab_node mm/vmscan.c:387 [inline]
 drop_slab+0x148/0x290 mm/vmscan.c:405
 drop_caches_sysctl_handler+0xbc/0x160 fs/drop_caches.c:68
 proc_sys_call_handler+0x550/0x8b0 fs/proc/proc_sysctl.c:595
 call_write_iter include/linux/fs.h:2087 [inline]
 iter_file_splice_write+0xbd6/0x14e0 fs/splice.c:743
 do_splice_from fs/splice.c:941 [inline]
 direct_splice_actor+0x11e/0x220 fs/splice.c:1164
 splice_direct_to_actor+0x58d/0xc80 fs/splice.c:1108
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0x28c/0x3e0 fs/splice.c:1233
 do_sendfile+0x56d/0xdc0 fs/read_write.c:1295
 __do_sys_sendfile64 fs/read_write.c:1356 [inline]
 __se_sys_sendfile64+0x100/0x1e0 fs/read_write.c:1348
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7ff6f6c7dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff6f793b0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007ff6f6dabf80 RCX: 00007ff6f6c7dda9
RDX: 0000000020002080 RSI: 0000000000000004 RDI: 0000000000000005
RBP: 00007ff6f6cca47a R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000023b R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007ff6f6dabf80 R15: 00007ffe6ed964e8
 </TASK>

The buggy address belongs to the virtual mapping at
 [ffffc90014bb0000, ffffc90014bb9000) created by:
 copy_process+0x5d5/0x3fc0 kernel/fork.c:2327

The buggy address belongs to the physical page:
page:ffffea0000b73740 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2dcdd
memcg:ffff888028c03482
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff ffff888028c03482
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 5099, tgid 5099 (syz-executor.2), ts 534532502815, free_ts 534447353748
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1533
 prep_new_page mm/page_alloc.c:1540 [inline]
 get_page_from_freelist+0x33ea/0x3580 mm/page_alloc.c:3311
 __alloc_pages+0x255/0x680 mm/page_alloc.c:4567
 alloc_pages_mpol+0x3de/0x650 mm/mempolicy.c:2133
 vm_area_alloc_pages mm/vmalloc.c:3063 [inline]
 __vmalloc_area_node mm/vmalloc.c:3139 [inline]
 __vmalloc_node_range+0x9a3/0x14a0 mm/vmalloc.c:3320
 alloc_thread_stack_node kernel/fork.c:307 [inline]
 dup_task_struct+0x3e9/0x7d0 kernel/fork.c:1112
 copy_process+0x5d5/0x3fc0 kernel/fork.c:2327
 kernel_clone+0x222/0x840 kernel/fork.c:2902
 __do_sys_clone kernel/fork.c:3045 [inline]
 __se_sys_clone kernel/fork.c:3029 [inline]
 __x64_sys_clone+0x258/0x2a0 kernel/fork.c:3029
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
page last free pid 5099 tgid 5099 stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1140 [inline]
 free_unref_page_prepare+0x95d/0xa80 mm/page_alloc.c:2346
 free_unref_page_list+0x5a3/0x850 mm/page_alloc.c:2532
 release_pages+0x2117/0x2400 mm/swap.c:1042
 __folio_batch_release+0x84/0x100 mm/swap.c:1062
 folio_batch_release include/linux/pagevec.h:83 [inline]
 truncate_inode_pages_range+0x457/0xf70 mm/truncate.c:362
 kill_bdev block/bdev.c:79 [inline]
 blkdev_flush_mapping+0x156/0x2b0 block/bdev.c:638
 blkdev_put_whole block/bdev.c:669 [inline]
 bdev_release+0x5cb/0x910 block/bdev.c:985
 deactivate_locked_super+0xc4/0x130 fs/super.c:472
 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1267
 task_work_run+0x24e/0x310 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:108 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
 syscall_exit_to_user_mode+0x167/0x360 kernel/entry/common.c:212
 do_syscall_64+0x108/0x240 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x6f/0x77

Memory state around the buggy address:
 ffffc90014bb7780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90014bb7800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc90014bb7880: f3 f3 f3 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00
                            ^
 ffffc90014bb7900: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
 ffffc90014bb7980: 00 00 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================