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BUG: KASAN: out-of-bounds in end_buffer_read_sync+0x89/0x90
Write of size 4 at addr ffffc9000376f820 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 02/16/2023
Call Trace:
 <TASK>
 dump_stack_lvl+0x12e/0x1d0
 print_report+0x163/0x510
 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+0x311/0xafc
 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
 [ffffc90003768000, ffffc90003771000) created by:
 copy_process+0x3d5/0x3b60

The buggy address belongs to the physical page:
page:ffffea0000a5f580 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x297d6
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
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 17357, tgid 17357 (syz-executor232), ts 553335070929, free_ts 551227767698
 get_page_from_freelist+0x3792/0x3910
 __alloc_pages+0x291/0x7f0
 __vmalloc_node_range+0x700/0x1080
 dup_task_struct+0x575/0x690
 copy_process+0x3d5/0x3b60
 kernel_clone+0x17d/0x700
 __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+0xf0e/0xf70
 free_unref_page_list+0x6be/0x960
 release_pages+0x1a07/0x1bc0
 __pagevec_release+0x66/0xe0
 truncate_inode_pages_range+0x360/0xd50
 blkdev_flush_mapping+0xfb/0x1f0
 blkdev_put+0x3da/0x5c0
 deactivate_locked_super+0x75/0xd0
 cleanup_mnt+0x3af/0x430
 task_work_run+0x20a/0x290
 exit_to_user_mode_loop+0xd1/0xf0
 exit_to_user_mode_prepare+0xb1/0x140
 syscall_exit_to_user_mode+0x54/0x2d0
 do_syscall_64+0x4d/0xc0
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffffc9000376f700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000376f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc9000376f800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                  ^
 ffffc9000376f880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000376f900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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