================================================================== 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+0x24/0x30 fs/buffer.c:160 Write of size 4 at addr ffffc90008e6f920 by task ksoftirqd/1/20 CPU: 1 PID: 20 Comm: ksoftirqd/1 Not tainted 5.15.148-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description+0x63/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x16b/0x1c0 mm/kasan/report.c:451 kasan_check_range+0x27e/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+0x24/0x30 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+0x87c/0x1470 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+0xf2/0x130 block/blk-mq.c:592 __do_softirq+0x3b3/0x93a kernel/softirq.c:558 run_ksoftirqd+0xc1/0x120 kernel/softirq.c:921 smpboot_thread_fn+0x51b/0x9d0 kernel/smpboot.c:164 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 </TASK> Memory state around the buggy address: ffffc90008e6f800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90008e6f880: 00 00 00 00 f1 f1 f1 f1 00 f2 f2 f2 00 00 f3 f3 >ffffc90008e6f900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffffc90008e6f980: 00 00 00 00 f1 f1 f1 f1 00 00 00 00 00 00 00 00 ffffc90008e6fa00: 00 00 00 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00 ==================================================================