btstack dump:
bn = 0, index = 0
bn = 30, index = 0
bn = 0, index = 0
bn = 30, index = 0
bn = 0, index = 0
bn = 30, 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
 dtReadFirst+0xe8e/0xec0 fs/jfs/jfs_dtree.c:3102
 jfs_readdir+0x11b5/0x6cd0 fs/jfs/jfs_dtree.c:2832
 wrap_directory_iterator+0xda/0x180 fs/readdir.c:65
 shared_jfs_readdir+0x3d/0x50 fs/jfs/namei.c:1543
 iterate_dir+0x459/0x630 fs/readdir.c:108
 __do_sys_getdents fs/readdir.c:327 [inline]
 __se_sys_getdents+0x182/0x560 fs/readdir.c:312
 __x64_sys_getdents+0x97/0xe0 fs/readdir.c:312
 x64_sys_call+0x1150/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:79
 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:
 jfs_readdir+0xde/0x6cd0 fs/jfs/jfs_dtree.c:2730
 wrap_directory_iterator+0xda/0x180 fs/readdir.c:65

CPU: 1 UID: 0 PID: 10750 Comm: syz.5.518 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
=====================================================