btstack dump:
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
bn = 0, index = 0
=====================================================
BUG: KMSAN: uninit-value in BT_STACK_DUMP+0x5e5/0x600 fs/jfs/jfs_btree.h:136
 BT_STACK_DUMP+0x5e5/0x600 fs/jfs/jfs_btree.h:136
 dtSearch+0x37aa/0x3b90 fs/jfs/jfs_dtree.c:771
 dtDelete+0xaa/0x45d0 fs/jfs/jfs_dtree.c:2099
 jfs_rename+0x19fc/0x2e60 fs/jfs/namei.c:1240
 vfs_rename+0x2149/0x2650 fs/namei.c:6054
 filename_renameat2+0xb7f/0x1260 fs/namei.c:6172
 __do_sys_renameat2 fs/namei.c:6201 [inline]
 __se_sys_renameat2+0xc7/0x5b0 fs/namei.c:6196
 __x64_sys_renameat2+0xe4/0x150 fs/namei.c:6196
 x64_sys_call+0x33ec/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:317
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable btstack created at:
 dtDelete+0x68/0x45d0 fs/jfs/jfs_dtree.c:2083
 jfs_rename+0x19fc/0x2e60 fs/jfs/namei.c:1240

CPU: 0 UID: 0 PID: 8632 Comm: syz.4.508 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
=====================================================