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BUG: KASAN: stack-out-of-bounds in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: stack-out-of-bounds in atomic_dec include/linux/atomic/atomic-instrumented.h:244 [inline]
BUG: KASAN: stack-out-of-bounds in put_bh include/linux/buffer_head.h:319 [inline]
BUG: KASAN: stack-out-of-bounds in end_buffer_read_sync+0x25/0x30 fs/buffer.c:160
Write of size 4 at addr ffffc90002def9c0 by task ksoftirqd/0/14

CPU: 0 PID: 14 Comm: ksoftirqd/0 Not tainted 5.15.181-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 print_address_description+0x60/0x2d0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0xdf/0x130 mm/kasan/report.c:451
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x27b/0x290 mm/kasan/generic.c:189
 instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
 atomic_dec include/linux/atomic/atomic-instrumented.h:244 [inline]
 put_bh include/linux/buffer_head.h:319 [inline]
 end_buffer_read_sync+0x25/0x30 fs/buffer.c:160
 end_bio_bh_io_sync+0xb3/0x110 fs/buffer.c:3007
 req_bio_endio block/blk-core.c:261 [inline]
 blk_update_request+0x876/0x1200 block/blk-core.c:1441
 blk_mq_end_request+0x3a/0x70 block/blk-mq.c:575
 blk_complete_reqs block/blk-mq.c:587 [inline]
 blk_done_softirq+0xfa/0x140 block/blk-mq.c:592
 handle_softirqs+0x328/0x820 kernel/softirq.c:558
 run_ksoftirqd+0x98/0xf0 kernel/softirq.c:925
 smpboot_thread_fn+0x4f6/0x970 kernel/smpboot.c:164
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>


Memory state around the buggy address:
 ffffc90002def880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90002def900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc90002def980: f1 f1 f1 f1 00 f2 f2 f2 00 00 f3 f3 00 00 00 00
                                              ^
 ffffc90002defa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90002defa80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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