REISERFS (device loop1): Using r5 hash to sort names
==================================================================
BUG: KASAN: out-of-bounds in memmove include/linux/string.h:392 [inline]
BUG: KASAN: out-of-bounds in leaf_paste_entries+0x449/0x910 fs/reiserfs/lbalance.c:1378
Read of size 18446744073709551593 at addr ffff8880362d8fa4 by task syz-executor.1/23313

CPU: 0 PID: 23313 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354
 kasan_report+0x8f/0xa0 mm/kasan/report.c:412
 memmove+0x20/0x50 mm/kasan/kasan.c:293
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 1
 memmove include/linux/string.h:392 [inline]
 leaf_paste_entries+0x449/0x910 fs/reiserfs/lbalance.c:1378
 balance_leaf_finish_node_paste_dirent fs/reiserfs/do_balan.c:1306 [inline]
 balance_leaf_finish_node_paste fs/reiserfs/do_balan.c:1332 [inline]
 balance_leaf_finish_node fs/reiserfs/do_balan.c:1375 [inline]
 balance_leaf+0x8fd7/0xca70 fs/reiserfs/do_balan.c:1463
 do_balance+0x30a/0x760 fs/reiserfs/do_balan.c:1899
 reiserfs_paste_into_item+0x636/0x7d0 fs/reiserfs/stree.c:2169
 reiserfs_add_entry+0x89a/0xcc0 fs/reiserfs/namei.c:566
 reiserfs_mkdir+0x66e/0x980 fs/reiserfs/namei.c:858
 create_privroot fs/reiserfs/xattr.c:880 [inline]
 reiserfs_xattr_init+0x406/0xae0 fs/reiserfs/xattr.c:1002
 reiserfs_fill_super+0x1f54/0x2d80 fs/reiserfs/super.c:2188
 mount_bdev+0x2fc/0x3b0 fs/super.c:1158
 mount_fs+0xa3/0x310 fs/super.c:1261
 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
 vfs_kern_mount fs/namespace.c:951 [inline]
 do_new_mount fs/namespace.c:2492 [inline]
 do_mount+0x115c/0x2f50 fs/namespace.c:2822
 ksys_mount+0xcf/0x130 fs/namespace.c:3038
 __do_sys_mount fs/namespace.c:3052 [inline]
 __se_sys_mount fs/namespace.c:3049 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3049
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fde7c64d5da
Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fde7abbdf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000001105 RCX: 00007fde7c64d5da
RDX: 0000000020001100 RSI: 0000000020000040 RDI: 00007fde7abbdfe0
RBP: 00007fde7abbe020 R08: 00007fde7abbe020 R09: 0000000000000080
R10: 0000000000000080 R11: 0000000000000202 R12: 0000000020001100
R13: 0000000020000040 R14: 00007fde7abbdfe0 R15: 0000000020000240

CPU: 1 PID: 23352 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0
The buggy address belongs to the page:
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
page:ffffea0000d8b600 count:3 mapcount:0 mapping:ffff8880b54023e0 index:0x213
Call Trace:
flags: 0xfff00000001044(referenced|active|private)
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
raw: 00fff00000001044 dead000000000100 dead000000000200 ffff8880b54023e0
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold+0xa/0xf lib/fault-inject.c:149
raw: 0000000000000213 ffff88809a7799d8 00000003ffffffff ffff8880b59f68c0
page dumped because: kasan: bad access detected
page->mem_cgroup:ffff8880b59f68c0
 should_fail_alloc_page mm/page_alloc.c:3088 [inline]
 prepare_alloc_pages mm/page_alloc.c:4346 [inline]
 __alloc_pages_nodemask+0x239/0x2890 mm/page_alloc.c:4393

Memory state around the buggy address:
 ffff8880362d8e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880362d8f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880362d8f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                               ^
 ffff8880362d9000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880362d9080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 alloc_pages_current+0x193/0x2a0 mm/mempolicy.c:2197
==================================================================
 alloc_pages include/linux/gfp.h:532 [inline]
 __page_cache_alloc+0x76/0x90 mm/filemap.c:969
 __do_page_cache_readahead+0x1a1/0x6c0 mm/readahead.c:195
 ra_submit mm/internal.h:66 [inline]
 ondemand_readahead.isra.0+0x575/0xd40 mm/readahead.c:493
 page_cache_sync_readahead mm/readahead.c:528 [inline]
 page_cache_sync_readahead+0x275/0x520 mm/readahead.c:510
 generic_file_buffered_read mm/filemap.c:2115 [inline]
 generic_file_read_iter+0x1497/0x2b60 mm/filemap.c:2385
 call_read_iter include/linux/fs.h:1815 [inline]
 generic_file_splice_read+0x44a/0x6d0 fs/splice.c:308
 do_splice_to+0x10e/0x160 fs/splice.c:881
 splice_direct_to_actor+0x2b9/0x8d0 fs/splice.c:959
 do_splice_direct+0x1a7/0x270 fs/splice.c:1068
 do_sendfile+0x550/0xc30 fs/read_write.c:1447
 __do_sys_sendfile64 fs/read_write.c:1508 [inline]
 __se_sys_sendfile64+0x147/0x160 fs/read_write.c:1494
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fdad740b0a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdad597d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fdad752af80 RCX: 00007fdad740b0a9
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006
RBP: 00007fdad597d1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0001000000201005 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fff977ff85f R14: 00007fdad597d300 R15: 0000000000022000