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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+0x92/0x4b0 fs/xfs/xfs_buf.c:1124
Read of size 4 at addr ffffc9002946fb74 by task kswapd1/110

CPU: 2 PID: 110 Comm: kswapd1 Not tainted 6.8.0-rc7-syzkaller-00130-g135288b73cef #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+0xd9/0x1b0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xc4/0x620 mm/kasan/report.c:488
 kasan_report+0xda/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+0x92/0x4b0 fs/xfs/xfs_buf.c:1124
 xfs_buf_delwri_submit_buffers+0x16e/0xa20 fs/xfs/xfs_buf.c:2210
 xfs_buf_delwri_submit+0x8a/0x270 fs/xfs/xfs_buf.c:2288
 xfs_qm_shrink_scan+0x209/0x3f0 fs/xfs/xfs_qm.c:521
 do_shrink_slab+0x426/0x1120 mm/shrinker.c:435
 shrink_slab+0x18a/0x1310 mm/shrinker.c:662
 shrink_one+0x493/0x7b0 mm/vmscan.c:4767
 shrink_many mm/vmscan.c:4828 [inline]
 lru_gen_shrink_node mm/vmscan.c:4929 [inline]
 shrink_node+0x21d0/0x3790 mm/vmscan.c:5888
 kswapd_shrink_node mm/vmscan.c:6693 [inline]
 balance_pgdat+0x9d2/0x1a90 mm/vmscan.c:6883
 kswapd+0x5be/0xc00 mm/vmscan.c:7143
 kthread+0x2c6/0x3b0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
 </TASK>

The buggy address belongs to the virtual mapping at
 [ffffc90029468000, ffffc90029471000) created by:
 kernel_clone+0xfd/0x930 kernel/fork.c:2902

The buggy address belongs to the physical page:
page:ffffea00012af480 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4abd2
memcg:ffff888053cc1b82
flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 04fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff ffff888053cc1b82
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 3043, tgid 3043 (syz-executor.1), ts 749684894736, free_ts 749318656413
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1533
 prep_new_page mm/page_alloc.c:1540 [inline]
 get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3311
 __alloc_pages+0x22f/0x2440 mm/page_alloc.c:4567
 alloc_pages_mpol+0x258/0x600 mm/mempolicy.c:2133
 vm_area_alloc_pages mm/vmalloc.c:3063 [inline]
 __vmalloc_area_node mm/vmalloc.c:3139 [inline]
 __vmalloc_node_range+0xa6e/0x1540 mm/vmalloc.c:3320
 alloc_thread_stack_node kernel/fork.c:307 [inline]
 dup_task_struct kernel/fork.c:1112 [inline]
 copy_process+0x138f/0x6e30 kernel/fork.c:2327
 kernel_clone+0xfd/0x930 kernel/fork.c:2902
 __do_sys_clone3+0x1f5/0x270 kernel/fork.c:3203
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 int80_emulation+0x10e/0x200 arch/x86/entry/common.c:253
 asm_int80_emulation+0x1a/0x20 arch/x86/include/asm/idtentry.h:573
page last free pid 31602 tgid 31602 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+0x527/0xb10 mm/page_alloc.c:2346
 free_unref_page+0x33/0x3c0 mm/page_alloc.c:2486
 __put_partials+0x14c/0x170 mm/slub.c:2922
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3813 [inline]
 slab_alloc_node mm/slub.c:3860 [inline]
 __do_kmalloc_node mm/slub.c:3980 [inline]
 __kmalloc_node+0x1de/0x470 mm/slub.c:3988
 kmalloc_node include/linux/slab.h:610 [inline]
 kvmalloc_node+0x9d/0x1a0 mm/util.c:617
 kvmalloc include/linux/slab.h:728 [inline]
 seq_buf_alloc fs/seq_file.c:38 [inline]
 seq_read_iter+0x830/0x12c0 fs/seq_file.c:210
 kernfs_fop_read_iter+0x417/0x580 fs/kernfs/file.c:279
 call_read_iter include/linux/fs.h:2081 [inline]
 new_sync_read fs/read_write.c:395 [inline]
 vfs_read+0x6c4/0xb80 fs/read_write.c:476
 ksys_read+0x12f/0x260 fs/read_write.c:619
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6f/0x77

Memory state around the buggy address:
 ffffc9002946fa00: 00 00 00 00 00 00 f1 f1 f1 f1 00 00 f3 f3 00 00
 ffffc9002946fa80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc9002946fb00: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
                                                             ^
 ffffc9002946fb80: 04 f2 04 f2 00 f3 f3 f3 00 00 00 00 00 00 00 00
 ffffc9002946fc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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