loop0: detected capacity change from 0 to 32768
==================================================================
BUG: KASAN: use-after-free in dtMoveEntry fs/jfs/jfs_dtree.c:3921 [inline]
BUG: KASAN: use-after-free in dtSplitPage+0x1f91/0x3ed0 fs/jfs/jfs_dtree.c:1560
Write of size 1 at addr ffff88805276e000 by task syz.0.0/5316

CPU: 0 UID: 0 PID: 5316 Comm: syz.0.0 Not tainted 6.13.0-rc7-syzkaller-00019-gc45323b7560e #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
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:378 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:489
 kasan_report+0x143/0x180 mm/kasan/report.c:602
 dtMoveEntry fs/jfs/jfs_dtree.c:3921 [inline]
 dtSplitPage+0x1f91/0x3ed0 fs/jfs/jfs_dtree.c:1560
 dtSplitUp fs/jfs/jfs_dtree.c:1091 [inline]
 dtInsert+0x14bd/0x6c10 fs/jfs/jfs_dtree.c:870
 jfs_rename+0xafe/0x1bf0 fs/jfs/namei.c:1225
 vfs_rename+0xbdb/0xf00 fs/namei.c:5067
 do_renameat2+0xd94/0x13f0 fs/namei.c:5224
 __do_sys_rename fs/namei.c:5271 [inline]
 __se_sys_rename fs/namei.c:5269 [inline]
 __x64_sys_rename+0x82/0x90 fs/namei.c:5269
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc310185d29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc310fed038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007fc310375fa0 RCX: 00007fc310185d29
RDX: 0000000000000000 RSI: 0000000020000f40 RDI: 0000000020000300
RBP: 00007fc310201b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc310375fa0 R15: 00007ffe9fe74928
 </TASK>

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5276e
flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
raw: 04fff00000000000 ffffea000149dbc8 ffff88801fc44b20 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner info is not present (never set?)

Memory state around the buggy address:
 ffff88805276df00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88805276df80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88805276e000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff88805276e080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88805276e100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================