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BUG: KASAN: out-of-bounds in instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
BUG: KASAN: out-of-bounds in atomic_dec include/linux/atomic/atomic-instrumented.h:592 [inline]
BUG: KASAN: out-of-bounds in put_bh include/linux/buffer_head.h:302 [inline]
BUG: KASAN: out-of-bounds in end_buffer_read_sync+0xc1/0xd0 fs/buffer.c:161
Write of size 4 at addr ffffc9000b55f680 by task ksoftirqd/1/23

CPU: 1 UID: 0 PID: 23 Comm: ksoftirqd/1 Not tainted 6.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:488
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189
 instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
 atomic_dec include/linux/atomic/atomic-instrumented.h:592 [inline]
 put_bh include/linux/buffer_head.h:302 [inline]
 end_buffer_read_sync+0xc1/0xd0 fs/buffer.c:161
 end_bio_bh_io_sync+0xbf/0x120 fs/buffer.c:2772
 blk_update_request+0x5e5/0x1160 block/blk-mq.c:981
 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1143
 blk_complete_reqs block/blk-mq.c:1218 [inline]
 blk_done_softirq+0x100/0x150 block/blk-mq.c:1223
 handle_softirqs+0x2c5/0x960 kernel/softirq.c:554
 run_ksoftirqd+0xca/0x130 kernel/softirq.c:943
 smpboot_thread_fn+0x544/0xa20 kernel/smpboot.c:164
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

The buggy address belongs to the virtual mapping at
 [ffffc9000b558000, ffffc9000b561000) created by:
 copy_process+0x5d1/0x3d40 kernel/fork.c:2205

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x100 pfn:0x21060
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000100 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 0x2dc2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_ZERO), pid 6388, tgid 6388 (syz-executor.1), ts 132446237945, free_ts 132426350340
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1ee/0x220 mm/page_alloc.c:1556
 prep_new_page mm/page_alloc.c:1564 [inline]
 get_page_from_freelist+0x35f4/0x3740 mm/page_alloc.c:3474
 __alloc_pages_noprof+0x261/0x6a0 mm/page_alloc.c:4751
 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
 vm_area_alloc_pages mm/vmalloc.c:3568 [inline]
 __vmalloc_area_node mm/vmalloc.c:3646 [inline]
 __vmalloc_node_range_noprof+0xa2b/0x13e0 mm/vmalloc.c:3828
 alloc_thread_stack_node kernel/fork.c:315 [inline]
 dup_task_struct+0x444/0x8c0 kernel/fork.c:1116
 copy_process+0x5d1/0x3d40 kernel/fork.c:2205
 kernel_clone+0x223/0x870 kernel/fork.c:2787
 __do_sys_clone3 kernel/fork.c:3091 [inline]
 __se_sys_clone3+0x2d8/0x360 kernel/fork.c:3070
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x82/0x160 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
page last free pid 5357 tgid 5357 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_unref_folios+0xf16/0x19e0 mm/page_alloc.c:2704
 folios_put_refs+0x76c/0x860 mm/swap.c:993
 folio_batch_release include/linux/pagevec.h:101 [inline]
 truncate_inode_pages_range+0x47d/0x11c0 mm/truncate.c:345
 kill_bdev block/bdev.c:91 [inline]
 blkdev_flush_mapping+0x106/0x270 block/bdev.c:671
 blkdev_put_whole block/bdev.c:678 [inline]
 bdev_release+0x460/0x700 block/bdev.c:1103
 blkdev_release+0x15/0x20 block/fops.c:635
 __fput+0x23c/0xa50 fs/file_table.c:450
 __do_sys_close fs/open.c:1550 [inline]
 __se_sys_close+0x18d/0x250 fs/open.c:1535
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x82/0x160 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

Memory state around the buggy address:
 ffffc9000b55f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000b55f600: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
>ffffc9000b55f680: 00 00 00 00 00 00 00 f2 f2 f2 f2 f2 00 f2 f2 f2
                      ^
 ffffc9000b55f700: 01 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000b55f780: 00 00 00 00 f1 f1 f1 f1 00 f3 f3 f3 00 00 00 00
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