XFS (loop0): Quotacheck: Done.
syz-executor.0 (6257): drop_caches: 2
==================================================================
BUG: KASAN: stack-out-of-bounds in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: stack-out-of-bounds in atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
BUG: KASAN: stack-out-of-bounds in xfs_buf_lock+0x9e/0x520 fs/xfs/xfs_buf.c:1191
Read of size 4 at addr ffffc900057c7b84 by task syz-executor.0/6257

CPU: 1 PID: 6257 Comm: syz-executor.0 Not tainted 6.9.0-rc2-syzkaller-00042-g3e92c1e6cd87 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:488
 kasan_report+0xd9/0x110 mm/kasan/report.c:601
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
 xfs_buf_lock+0x9e/0x520 fs/xfs/xfs_buf.c:1191
 xfs_buf_delwri_submit_buffers+0x140/0xa40 fs/xfs/xfs_buf.c:2290
 xfs_buf_delwri_submit+0x8a/0x270 fs/xfs/xfs_buf.c:2368
 xfs_qm_shrink_scan+0x209/0x3f0 fs/xfs/xfs_qm.c:522
 do_shrink_slab+0x44f/0x11c0 mm/shrinker.c:435
 shrink_slab+0x18a/0x1310 mm/shrinker.c:662
 drop_slab_node mm/vmscan.c:393 [inline]
 drop_slab+0x14c/0x2c0 mm/vmscan.c:411
 drop_caches_sysctl_handler+0x171/0x190 fs/drop_caches.c:68
 proc_sys_call_handler+0x4cc/0x6f0 fs/proc/proc_sysctl.c:595
 call_write_iter include/linux/fs.h:2108 [inline]
 iter_file_splice_write+0x906/0x10b0 fs/splice.c:743
 do_splice_from fs/splice.c:941 [inline]
 direct_splice_actor+0x19b/0x6d0 fs/splice.c:1164
 splice_direct_to_actor+0x346/0xa40 fs/splice.c:1108
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0x17e/0x250 fs/splice.c:1233
 do_sendfile+0xaa8/0xdb0 fs/read_write.c:1295
 __do_sys_sendfile64 fs/read_write.c:1356 [inline]
 __se_sys_sendfile64 fs/read_write.c:1348 [inline]
 __x64_sys_sendfile64+0x155/0x220 fs/read_write.c:1348
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x72/0x7a
RIP: 0033:0x7f183087dda9
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:00007f18303ff0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f18309abf80 RCX: 00007f183087dda9
RDX: 0000000020002080 RSI: 0000000000000004 RDI: 0000000000000005
RBP: 00007f18308ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000870 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f18309abf80 R15: 00007ffc19004ef8
 </TASK>

The buggy address belongs to the virtual mapping at
 [ffffc900057c0000, ffffc900057c9000) created by:
 kernel_clone+0xfd/0x980 kernel/fork.c:2796

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x22cc0
memcg:ffff88801f36a282
flags: 0xfff80000000000(node=0|zone=1|lastcpupid=0xfff)
page_type: 0xffffffff()
raw: 00fff80000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff ffff88801f36a282
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 2, tgid 2 (kthreadd), ts 79997909010, free_ts 79775927394
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1534
 prep_new_page mm/page_alloc.c:1541 [inline]
 get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3317
 __alloc_pages+0x22b/0x2460 mm/page_alloc.c:4575
 alloc_pages_mpol+0x275/0x610 mm/mempolicy.c:2264
 vm_area_alloc_pages mm/vmalloc.c:3545 [inline]
 __vmalloc_area_node mm/vmalloc.c:3621 [inline]
 __vmalloc_node_range+0xa26/0x14b0 mm/vmalloc.c:3802
 alloc_thread_stack_node kernel/fork.c:309 [inline]
 dup_task_struct kernel/fork.c:1114 [inline]
 copy_process+0xe56/0x9160 kernel/fork.c:2219
 kernel_clone+0xfd/0x980 kernel/fork.c:2796
 kernel_thread+0xc0/0x100 kernel/fork.c:2858
 create_kthread kernel/kthread.c:411 [inline]
 kthreadd+0x4ef/0x7d0 kernel/kthread.c:764
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
page last free pid 5429 tgid 5429 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1141 [inline]
 free_unref_page_prepare+0x527/0xb10 mm/page_alloc.c:2347
 free_unref_folios+0x256/0xad0 mm/page_alloc.c:2536
 folios_put_refs+0x49c/0x750 mm/swap.c:1034
 folio_batch_release include/linux/pagevec.h:101 [inline]
 mapping_try_invalidate+0x393/0x470 mm/truncate.c:526
 invalidate_bdev+0xab/0xd0 block/bdev.c:96
 generic_shutdown_super+0x159/0x3d0 fs/super.c:641
 kill_block_super+0x3b/0x90 fs/super.c:1693
 xfs_kill_sb+0x15/0x50 fs/xfs/xfs_super.c:2026
 deactivate_locked_super+0xbe/0x1a0 fs/super.c:472
 deactivate_super+0xde/0x100 fs/super.c:505
 cleanup_mnt+0x222/0x450 fs/namespace.c:1267
 task_work_run+0x14e/0x250 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:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x275/0x2a0 kernel/entry/common.c:218
 do_syscall_64+0xe2/0x260 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

Memory state around the buggy address:
 ffffc900057c7a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc900057c7b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1
>ffffc900057c7b80: f1 f1 04 f2 04 f2 00 f3 f3 f3 00 00 00 00 00 00
                   ^
 ffffc900057c7c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc900057c7c80: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 f1 f1 04 f2
==================================================================