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BUG: KASAN: out-of-bounds in end_buffer_read_sync+0x89/0x90
Write of size 4 at addr ffffc90003a7f820 by task ksoftirqd/1/21

CPU: 1 PID: 21 Comm: ksoftirqd/1 Not tainted 6.2.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Call Trace:
 <TASK>
 dump_stack_lvl+0x12e/0x1d0
 print_report+0x163/0x4c0
 kasan_report+0xce/0x100
 kasan_check_range+0x283/0x290
 end_buffer_read_sync+0x89/0x90
 end_bio_bh_io_sync+0x8d/0xe0
 blk_update_request+0x3a3/0x1000
 blk_mq_end_request+0x39/0x60
 blk_done_softirq+0x83/0x120
 __do_softirq+0x308/0xaea
 run_ksoftirqd+0xa6/0x100
 smpboot_thread_fn+0x534/0x8e0
 kthread+0x232/0x2b0
 ret_from_fork+0x1f/0x30
 </TASK>

The buggy address belongs to the virtual mapping at
 [ffffc90003a78000, ffffc90003a81000) created by:
 copy_process+0x3d5/0x3b30

The buggy address belongs to the physical page:
page:ffffea0000836540 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x20d95
memcg:ffff8880242f7a82
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff ffff8880242f7a82
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 7925, tgid 7925 (dhcpcd-run-hook), ts 132066917474, free_ts 132061054512
 get_page_from_freelist+0x3403/0x3580
 __alloc_pages+0x291/0x7e0
 __vmalloc_node_range+0x703/0x10b0
 dup_task_struct+0x575/0x690
 copy_process+0x3d5/0x3b30
 kernel_clone+0x17d/0x6f0
 __x64_sys_clone+0x228/0x290
 do_syscall_64+0x41/0xc0
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
page last free stack trace:
 free_unref_page_prepare+0xf3a/0x1040
 free_unref_page_list+0x6b1/0x950
 release_pages+0x1a07/0x1bc0
 tlb_flush_mmu+0xe9/0x1e0
 tlb_finish_mmu+0xb6/0x1c0
 exit_mmap+0x264/0x740
 __mmput+0xcb/0x300
 exit_mm+0x1c4/0x280
 do_exit+0x4d0/0x1cf0
 do_group_exit+0x1b9/0x280
 __x64_sys_exit_group+0x3f/0x40
 do_syscall_64+0x41/0xc0
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffffc90003a7f700: 00 00 00 00 00 00 00 00 00 00 00 00 00 f2 f2 f2
 ffffc90003a7f780: f2 f2 f2 f2 f2 f2 00 00 00 00 00 00 00 00 00 00
>ffffc90003a7f800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                  ^
 ffffc90003a7f880: 00 00 00 f2 f2 f2 f2 f2 f2 f2 f2 f2 00 00 00 00
 ffffc90003a7f900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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