Re: [PATCH] fdisk: fix segfault on bsd label

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2012/5/4 Davidlohr Bueso <dave@xxxxxxx>:
> From: Davidlohr Bueso <dave@xxxxxxx>
>
> Commit 8db8295d824cd0c8cba9385e4635d6e311d69d3f added a regression that causes the program to crash when
> touching the partition structure (pte) for BSD/OSF labels. Since DOS has its own initialization function,
> allow BSD labels to use it as well.
>
> Steps to reproduce:
>
> $> fdisk bsd.img (obtained from blkid regression test files)
> Command (m for help): p
> ...
> I/O size (minimum/optimal): 512 bytes / 512 bytes
> Disk identifier: 0x00000000
>
> Segmentation fault

Thanks Davidlohr for pointing out that regression. Does it occurs with
the command to print the partition table when the drive has a BSD
label and hasn't a valid DOS label, and it has no partition? Fdisk
switches from BSD label to DOS label without initializing DOS
structures, right?

fdisk.c:
    bsd_command_prompt();
    /* If we return we may want to make an empty DOS label? */
    disklabel = DOS_LABEL;
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