==================================================================
BUG: KASAN: out-of-bounds in instrument_atomic_read_write include/linux/instrumented.h:102 [inline]
BUG: KASAN: out-of-bounds in atomic_dec include/linux/atomic/atomic-instrumented.h:257 [inline]
BUG: KASAN: out-of-bounds in put_bh include/linux/buffer_head.h:320 [inline]
BUG: KASAN: out-of-bounds in end_buffer_read_sync+0xbd/0xd0 fs/buffer.c:160
Write of size 4 at addr ffffc900052af820 by task ksoftirqd/0/15

CPU: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 6.1.131-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:316 [inline]
 print_report+0x15f/0x4f0 mm/kasan/report.c:427
 kasan_report+0x136/0x160 mm/kasan/report.c:531
 kasan_check_range+0x27f/0x290 mm/kasan/generic.c:189
 instrument_atomic_read_write include/linux/instrumented.h:102 [inline]
 atomic_dec include/linux/atomic/atomic-instrumented.h:257 [inline]
 put_bh include/linux/buffer_head.h:320 [inline]
 end_buffer_read_sync+0xbd/0xd0 fs/buffer.c:160
 end_bio_bh_io_sync+0xb3/0x110 fs/buffer.c:2655
 req_bio_endio block/blk-mq.c:780 [inline]
 blk_update_request+0x53b/0x1010 block/blk-mq.c:925
 blk_mq_end_request+0x3a/0x70 block/blk-mq.c:1050
 blk_complete_reqs block/blk-mq.c:1130 [inline]
 blk_done_softirq+0xf8/0x140 block/blk-mq.c:1135
 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:578
 run_ksoftirqd+0xc6/0x120 kernel/softirq.c:945
 smpboot_thread_fn+0x52c/0xa30 kernel/smpboot.c:164
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>

The buggy address belongs to the virtual mapping at
 [ffffc900052a8000, ffffc900052b1000) created by:
 copy_process+0x637/0x40a0 kernel/fork.c:2096

The buggy address belongs to the physical page:
page:ffffea000183e8c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x60fa3
memcg:ffff888024dd9b02
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff ffff888024dd9b02
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 4567, tgid 4567 (syz.3.62), ts 105953210069, free_ts 101105487204
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2532
 prep_new_page mm/page_alloc.c:2539 [inline]
 get_page_from_freelist+0x3731/0x38d0 mm/page_alloc.c:4328
 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5606
 vm_area_alloc_pages mm/vmalloc.c:2994 [inline]
 __vmalloc_area_node mm/vmalloc.c:3063 [inline]
 __vmalloc_node_range+0x9b3/0x14b0 mm/vmalloc.c:3235
 alloc_thread_stack_node kernel/fork.c:312 [inline]
 dup_task_struct+0x3e5/0x6d0 kernel/fork.c:989
 copy_process+0x637/0x40a0 kernel/fork.c:2096
 kernel_clone+0x222/0x920 kernel/fork.c:2681
 __do_sys_clone3 kernel/fork.c:2980 [inline]
 __se_sys_clone3+0x3eb/0x440 kernel/fork.c:2964
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1459 [inline]
 free_pcp_prepare mm/page_alloc.c:1509 [inline]
 free_unref_page_prepare+0x12a6/0x15b0 mm/page_alloc.c:3384
 free_unref_page+0x33/0x3e0 mm/page_alloc.c:3479
 __vunmap+0x873/0xa30 mm/vmalloc.c:2718
 kcov_put kernel/kcov.c:437 [inline]
 kcov_close+0x27/0x50 kernel/kcov.c:533
 __fput+0x3f6/0x8d0 fs/file_table.c:320
 task_work_run+0x246/0x300 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xa6e/0x26a0 kernel/exit.c:871
 do_group_exit+0x202/0x2b0 kernel/exit.c:1021
 __do_sys_exit_group kernel/exit.c:1032 [inline]
 __se_sys_exit_group kernel/exit.c:1030 [inline]
 __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1030
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Memory state around the buggy address:
 ffffc900052af700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc900052af780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc900052af800: f1 f1 f1 f1 00 00 00 00 00 00 00 f2 f2 f2 f2 f2
                                  ^
 ffffc900052af880: 00 f2 f2 f2 01 f3 f3 f3 00 00 00 00 00 00 00 00
 ffffc900052af900: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
==================================================================