File execution denied
 

I have a SUSE Linux on my notebook as a partition. It can be run directly with its native kernel with version 2.6.13-8-default, or run within MS-Windows with a CoLinux kernel version 2.6.11-co-0.6.4.

I found a strange behavior on this system that I have not observed my other Linux boxes.
It refuses to excute a file if it is not in certain directories. I have compiled a hello.c and no matter how I set the file permission, it refuses to execute the a.out, or any name it turns into. The failure reported by bash is "Permission Denied". If I copied this file into /usr/bin, then it excutes correctly. I copied some file from /usr/bin into my home directory, for example bzip2 and type ./bzip2. The same error happens. I logged in as root, and the same happens.

Since two different kernels behaves the same, I think this is not a problem of kernel configuration.
Is this certain security check enabled somewhere, or is there something wrong with this system?

are you sure you aren't mounting the partition with certain parameters that don't let you modify permissions?
my first shot would be to check fstab

File systems can be mounted with option:
NO execute

The result is that no executable can be run from there.

Check:

mount

If you see noexec, you know where the problem is.

You can manually change the options in runtime (means its transparent and harmless for apps):
mount -o remount,exec /home

Ok. I checked the mount, and the /home partition is noexec.

Thanks for the quick answer.