Re: [PATCH 21/21] MODSIGN: Apply signature checking to modules on module load [ver #3]

2011-12-09 Thread Rusty Russell
On Fri, 09 Dec 2011 18:43:26 +, David Howells wrote: > Rusty Russell wrote: > > > And adds a great deal of code in a supposedly security-sensitive path to > > achieve it. > > > > How about simply append a signature to the module? That'd be about 20 lines > > of code to carefully check the

Re: [PATCH 21/21] MODSIGN: Apply signature checking to modules on module load [ver #3]

2011-12-09 Thread David Howells
Rusty Russell wrote: > And adds a great deal of code in a supposedly security-sensitive path to > achieve it. > > How about simply append a signature to the module? That'd be about 20 lines > of code to carefully check the bounds of the module to figure out where the > signature is. You could

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2011-12-09 Thread
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Re: [PATCH 21/21] MODSIGN: Apply signature checking to modules on module load [ver #3]

2011-12-09 Thread Rusty Russell
On Fri, 02 Dec 2011 18:46:51 +, David Howells wrote: > Signed modules may be safely stripped as the signature only covers those parts > of the module the kernel actually uses and any ELF metadata required to deal > with them. Any necessary ELF metadata that is affected by stripping is > canon