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vma corrupt with newer maple_tree crashes (6.12-rc3 crash) #30

@thehajime

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@thehajime
Thread 1 "vmlinux" received signal SIGSEGV, Segmentation fault.
                                                               acct_collect (exitcode=exitcode@entry=0, group_dead=group_dead@entry=1) at ../kernel/acct.c:565
565      vsize += vma->vm_end - vma->vm_start;
(gdb) p vma
$4 = (struct vm_area_struct *) 0x9
(gdb) bt
#0  acct_collect (exitcode=exitcode@entry=0, group_dead=group_dead@entry=1) at ../kernel/acct.c:565
#1  0x000000006003dca5 in do_exit (code=code@entry=0) at ../kernel/exit.c:918
#2  0x000000006003e64e in do_group_exit (exit_code=0) at ../kernel/exit.c:1088
#3  0x000000006003e668 in __do_sys_exit_group (error_code=<optimized out>) at ../kernel/exit.c:1099
#4  __se_sys_exit_group (error_code=<optimized out>) at ../kernel/exit.c:1097
#5  0x0000000060038793 in do_syscall_64 (regs=0x703d0690) at ../arch/x86/um/do_syscall_64.c:85
#6  0x0000000060038913 in __kernel_vsyscall () at ../arch/x86/um/entry_64.S:74
#7  0x23e8c78948302444 in ?? ()

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