ERROR: (device loop1): dtReadFirst: btstack overrun
ERROR: (device loop1): remounting filesystem as read-only
btstack dump:
bn = 0, index = 0
bn = 2c, index = 0
bn = 0, index = 0
bn = 2c, index = 0
bn = 0, index = 0
bn = 2c, 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+0xebf/0xf00 fs/jfs/jfs_dtree.c:3102
 jfs_readdir+0x11b9/0x6db0 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+0x452/0x620 fs/readdir.c:108
 __do_compat_sys_getdents fs/readdir.c:579 [inline]
 __se_compat_sys_getdents fs/readdir.c:565 [inline]
 __ia32_compat_sys_getdents+0x1df/0x600 fs/readdir.c:565
 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+0x154/0x330 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x38/0x80 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/0x6db0 fs/jfs/jfs_dtree.c:2730
 wrap_directory_iterator+0xda/0x180 fs/readdir.c:65

CPU: 0 UID: 0 PID: 9082 Comm: syz.1.1090 Not tainted syzkaller #0 PREEMPT(none) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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