Messages in this thread Patch in this message | | | Date | Tue, 5 Jun 2012 13:05:41 +0200 | From | Borislav Petkov <> | Subject | [PATCH] CMA: Do no enable it by default |
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From: Borislav Petkov <borislav.petkov@amd.com> Date: Tue, 5 Jun 2012 12:52:01 +0200 Subject: [PATCH] CMA: Do no enable it by default
From: Borislav Petkov <borislav.petkov@amd.com> Date: Tue, 5 Jun 2012 12:52:01 +0200 Subject: [PATCH] CMA: Do no enable it by default
CROSS_MEMORY_ATTACH is a MPI feature which shouldn't be enabled by default on every linux system simply because the majority of users do not need it.
Besides, in the config option it says "... which allow a process with the correct privileges to directly read from or write to to another process's address space.", which, if the reading process has somehow gained privileges (as that never happens) is your security issue right there.
So disable it - people who really need that normally know what they're doing and also know how to enable it.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com> --- mm/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/Kconfig b/mm/Kconfig index 82fed4eb2b6f..3b6347cf4c06 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -352,7 +352,7 @@ endchoice config CROSS_MEMORY_ATTACH bool "Cross Memory Support" depends on MMU - default y + default n help Enabling this option adds the system calls process_vm_readv and process_vm_writev which allow a process with the correct privileges -- 1.7.11.rc1
-- Regards/Gruss, Boris.
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