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BUG: KASAN: use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
BUG: KASAN: use-after-free in test_bit_le include/asm-generic/bitops/le.h:21 [inline]
BUG: KASAN: use-after-free in reiserfs_readdir_inode+0xce1/0x14b0 fs/reiserfs/dir.c:147
Read of size 8 at addr ffff8880662e6000 by task syz-executor.0/5487

CPU: 1 PID: 5487 Comm: syz-executor.0 Not tainted 6.7.0-rc6-syzkaller-00229-g5414aea7b750 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0xc4/0x620 mm/kasan/report.c:475
 kasan_report+0xda/0x110 mm/kasan/report.c:588
 check_region_inline mm/kasan/generic.c:181 [inline]
 kasan_check_range+0xef/0x190 mm/kasan/generic.c:187
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 test_bit_le include/asm-generic/bitops/le.h:21 [inline]
 reiserfs_readdir_inode+0xce1/0x14b0 fs/reiserfs/dir.c:147
 iterate_dir+0x1e5/0x5b0 fs/readdir.c:106
 __do_sys_getdents64 fs/readdir.c:405 [inline]
 __se_sys_getdents64 fs/readdir.c:390 [inline]
 __x64_sys_getdents64+0x14f/0x2e0 fs/readdir.c:390
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fc63447cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc6351060c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007fc63459bf80 RCX: 00007fc63447cae9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007fc6344c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fc63459bf80 R15: 00007fff2042afc8
 </TASK>

The buggy address belongs to the physical page:
page:ffffea000198b980 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x662e6
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000000 ffffea000198b9c8 ffffea000198b5c8 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 0, migratetype Movable, gfp_mask 0x8(__GFP_MOVABLE), pid 1, tgid 1 (swapper/0), ts 23315911664, free_ts 25009361309
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2d0/0x350 mm/page_alloc.c:1537
 split_map_pages+0x1ff/0x520 mm/compaction.c:97
 isolate_freepages_range+0x318/0x370 mm/compaction.c:774
 alloc_contig_range+0x32e/0x510 mm/page_alloc.c:6411
 __alloc_contig_pages mm/page_alloc.c:6434 [inline]
 alloc_contig_pages+0x31a/0x610 mm/page_alloc.c:6514
 debug_vm_pgtable_alloc_huge_page mm/debug_vm_pgtable.c:1095 [inline]
 init_args mm/debug_vm_pgtable.c:1277 [inline]
 debug_vm_pgtable+0x5d8/0x3250 mm/debug_vm_pgtable.c:1315
 do_one_initcall+0x11c/0x650 init/main.c:1236
 do_initcall_level init/main.c:1298 [inline]
 do_initcalls init/main.c:1314 [inline]
 do_basic_setup init/main.c:1333 [inline]
 kernel_init_freeable+0x687/0xc10 init/main.c:1551
 kernel_init+0x1c/0x2a0 init/main.c:1441
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1137 [inline]
 free_unref_page_prepare+0x4fa/0xaa0 mm/page_alloc.c:2347
 free_unref_page+0x33/0x3b0 mm/page_alloc.c:2487
 free_contig_range+0xb6/0x190 mm/page_alloc.c:6536
 destroy_args+0xa69/0xe40 mm/debug_vm_pgtable.c:1028
 debug_vm_pgtable+0x16fe/0x3250 mm/debug_vm_pgtable.c:1408
 do_one_initcall+0x11c/0x650 init/main.c:1236
 do_initcall_level init/main.c:1298 [inline]
 do_initcalls init/main.c:1314 [inline]
 do_basic_setup init/main.c:1333 [inline]
 kernel_init_freeable+0x687/0xc10 init/main.c:1551
 kernel_init+0x1c/0x2a0 init/main.c:1441
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242

Memory state around the buggy address:
 ffff8880662e5f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880662e5f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880662e6000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff8880662e6080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8880662e6100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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