ERROR: (device loop4): dtReadFirst: btstack overrun
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
 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:1540
 iterate_dir+0x459/0x630 fs/readdir.c:108
 __do_compat_sys_getdents fs/readdir.c:582 [inline]
 __se_compat_sys_getdents fs/readdir.c:567 [inline]
 __ia32_compat_sys_getdents+0x1df/0x600 fs/readdir.c:567
 ia32_sys_call+0x3ab6/0x4340 arch/x86/include/generated/asm/syscalls_32.h:142
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0x14a/0x310 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/syscall_32.c:332
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:370
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

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: 0 UID: 0 PID: 10592 Comm: syz.4.902 Tainted: G             L      syzkaller #0 PREEMPT(voluntary) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
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