On 11/12/12 11:34, Alexander Graf wrote:
>
> On 07.12.2012, at 14:55, Jens Freimann wrote:
>
>> From: Christian Borntraeger <borntrae...@de.ibm.com>
>>
>> Since commit 967c0da73a7b0da186baba6632301d83644a570c
>> vl.c: Avoid segfault when started with no arguments
>>
>> the user can specify a kernel without a command line. Lets not
>> overwrite the default command line with \0 in that case.
>>
>> Signed-off-by: Christian Borntraeger <borntrae...@de.ibm.com>
>> Signed-off-by: Jens Freimann <jf...@linux.vnet.ibm.com>
>> ---
>> hw/s390-virtio.c | 2 +-
>> 1 files changed, 1 insertions(+), 1 deletions(-)
>>
>> diff --git a/hw/s390-virtio.c b/hw/s390-virtio.c
>> index ca1bb09..d77871a 100644
>> --- a/hw/s390-virtio.c
>> +++ b/hw/s390-virtio.c
>> @@ -290,7 +290,7 @@ static void s390_init(QEMUMachineInitArgs *args)
>> stq_p(rom_ptr(INITRD_PARM_SIZE), initrd_size);
>> }
>>
>> - if (rom_ptr(KERN_PARM_AREA)) {
>> + if (rom_ptr(KERN_PARM_AREA) && strlen(kernel_cmdline)) {
>
> why strlen()? If no -append option was passed, kernel_cmdline should be NULL.
> If -append "" was passed, the user wants to command line to be overwritten
> with "\0".
Nope. kernel_cmdline is always a valid pointer.
vl.c:
[..]
if (!kernel_cmdline) {
kernel_cmdline = "";
}
[..]
