Ravi Teja <ravi2j <at> gmail.com> writes:
Hello Ravi Teja, I've got the same problem as you. I've set mmap_min_addr as 0 and when I intentionally use MAP_FIXED to mmap to 0x00000000. I've got error "Permission Denied".
I want to ask you that which .config file have you modified and what modification have you make. I really hope you can help me. Thank you. Best Regards to you. Yaner
Hello all, I have successfully acessed(read and write) to 0x00000000(NULL) address. I
had to make certain changes in .config file and recompile it.
Thank you all.
Regards Ravi Teja
On Sat, Sep 21, 2013 at 8:00 PM, anish singh <anish198519851985 <at>
gmail.com> wrote:
On Sep 21, 2013 7:35 PM, "Ravi Teja" <ravi2j <at> gmail.com> wrote:
Hello Ratheesh,
I have intentionally used MAP_FIXED flag as I am interested in mapping
to 0x00000000.
AFAICS in linux generally mapping to null address is not allowed as this
decision helps in debugging null dereference errors.
Even after setting the mmap_min_addr in /proc/sys/vm to 0 (which was
previously 4096), I am getting this error.
Is there anything wrong that I am doing?
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