Re: [PATCH] Masking kernel commandline parameters (2.6.7)

[Andrew Morton]

Juergen Pabel <jpabel@xxxxxxxxx> wrote:
>
> my patch allows for kernel commandline parameters (ie: from bootloader) to be masked in order to 
>  prevent later retrieval (/proc/cmdline for example).

In recent 2.6 kernels you can simply do a chmod on /proc/cmdline.

bix:/usr/src/bk25> cat /proc/cmdline
ro root=/dev/sda2 profile=1 vga=extended
bix:/usr/src/bk25> 0 chmod 0400 /proc/cmdline
bix:/usr/src/bk25> cat /proc/cmdline         
cat: /proc/cmdline: Permission denied

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