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+0x393f/0x3d30 fs/jfs/jfs_dtree.c:774
 jfs_lookup+0x179/0x590 fs/jfs/namei.c:1461
 __lookup_slow+0x563/0x760 fs/namei.c:1816
 lookup_slow+0x6a/0xd0 fs/namei.c:1833
 walk_component fs/namei.c:2151 [inline]
 link_path_walk+0xef4/0x1460 fs/namei.c:2519
 path_lookupat+0xc8/0x6b0 fs/namei.c:2675
 filename_lookup+0x2bd/0x800 fs/namei.c:2705
 filename_setxattr+0x7e/0xcc0 fs/xattr.c:660
 path_setxattrat+0x734/0x820 fs/xattr.c:713
 __do_sys_lsetxattr fs/xattr.c:754 [inline]
 __se_sys_lsetxattr fs/xattr.c:750 [inline]
 __x64_sys_lsetxattr+0x103/0x1c0 fs/xattr.c:750
 x64_sys_call+0x30f0/0x3e30 arch/x86/include/generated/asm/syscalls_64.h:190
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable btstack created at:
 jfs_lookup+0x44/0x590 fs/jfs/namei.c:1451
 __lookup_slow+0x563/0x760 fs/namei.c:1816

CPU: 1 UID: 0 PID: 21768 Comm: syz.6.4365 Tainted: G        W           syzkaller #0 PREEMPT(none) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
=====================================================