REISERFS (device loop0): Using r5 hash to sort names
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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+0xb0d/0x13b0 fs/reiserfs/dir.c:147
Read of size 8 at addr ffff888072680000 by task syz-executor239/5034

CPU: 1 PID: 5034 Comm: syz-executor239 Not tainted 6.4.0-next-20230707-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:364
 print_report mm/kasan/report.c:475 [inline]
 kasan_report+0x11d/0x130 mm/kasan/report.c:588
 check_region_inline mm/kasan/generic.c:181 [inline]
 kasan_check_range+0xf0/0x190 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+0xb0d/0x13b0 fs/reiserfs/dir.c:147
 iterate_dir+0x5b2/0x750 fs/readdir.c:65
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64 fs/readdir.c:354 [inline]
 __x64_sys_getdents64+0x13e/0x2c0 fs/readdir.c:354
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f82b2b9d939
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffcd0daae8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 0000000000011efc RCX: 00007f82b2b9d939
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 0000000000000000 R08: 00007fffcd0dab10 R09: 00007fffcd0dab10
R10: 0000000000001131 R11: 0000000000000246 R12: 00007fffcd0dab0c
R13: 00007fffcd0dab40 R14: 00007fffcd0dab20 R15: 0000000000000002
 </TASK>

The buggy address belongs to the physical page:
page:ffffea0001c9a000 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x72680
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000000 ffffea0001c9a048 ffff8880b9843460 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 0x140cca(GFP_HIGHUSER_MOVABLE|__GFP_COMP), pid 5030, tgid 5030 (udevd), ts 74034269571, free_ts 74036017218
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1569
 prep_new_page mm/page_alloc.c:1576 [inline]
 get_page_from_freelist+0xfd9/0x2c40 mm/page_alloc.c:3256
 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4512
 __folio_alloc+0x16/0x40 mm/page_alloc.c:4544
 vma_alloc_folio+0x155/0x880 mm/mempolicy.c:2240
 shmem_alloc_folio+0x11d/0x1f0 mm/shmem.c:1596
 shmem_alloc_and_acct_folio+0x15e/0x5d0 mm/shmem.c:1620
 shmem_get_folio_gfp+0x9cc/0x1a80 mm/shmem.c:1965
 shmem_get_folio mm/shmem.c:2096 [inline]
 shmem_write_begin+0x14a/0x380 mm/shmem.c:2596
 generic_perform_write+0x26b/0x5d0 mm/filemap.c:3925
 __generic_file_write_iter+0x1f8/0x240 mm/filemap.c:4020
 generic_file_write_iter+0xe3/0x350 mm/filemap.c:4046
 call_write_iter include/linux/fs.h:1873 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x981/0xda0 fs/read_write.c:584
 ksys_write+0x122/0x250 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1160 [inline]
 free_unref_page_prepare+0x62e/0xcb0 mm/page_alloc.c:2383
 free_unref_page_list+0xe3/0xa70 mm/page_alloc.c:2524
 release_pages+0xcd8/0x1380 mm/swap.c:1042
 __folio_batch_release+0x77/0xe0 mm/swap.c:1062
 folio_batch_release include/linux/pagevec.h:83 [inline]
 shmem_undo_range+0x583/0x1240 mm/shmem.c:954
 shmem_truncate_range mm/shmem.c:1066 [inline]
 shmem_evict_inode+0x332/0xb70 mm/shmem.c:1181
 evict+0x2ed/0x6b0 fs/inode.c:665
 iput_final fs/inode.c:1789 [inline]
 iput.part.0+0x50a/0x740 fs/inode.c:1815
 iput+0x5c/0x80 fs/inode.c:1805
 dentry_unlink_inode+0x2b1/0x460 fs/dcache.c:401
 __dentry_kill+0x3c0/0x640 fs/dcache.c:607
 dentry_kill fs/dcache.c:745 [inline]
 dput+0x6ac/0xe10 fs/dcache.c:913
 do_renameat2+0xc14/0xd40 fs/namei.c:5012
 __do_sys_rename fs/namei.c:5056 [inline]
 __se_sys_rename fs/namei.c:5054 [inline]
 __x64_sys_rename+0x81/0xa0 fs/namei.c:5054
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffff88807267ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88807267ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888072680000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff888072680080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888072680100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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