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Date: Fri, 13 Mar 2015 11:38:25 -1000 From: Matthew Garrett <matthew.garrett@...ula.com> To: linux-security-module@...r.kernel.org Cc: james.l.morris@...cle.com, serge@...lyn.com, linux-kernel@...r.kernel.org, keescook@...omium.org, hpa@...or.com, gnomes@...rguk.ukuu.org.uk, Matthew Garrett <matthew.garrett@...ula.com> Subject: [PATCH 09/12] uswsusp: Disable when trusted_kernel is true uswsusp allows a user process to dump and then restore kernel state, which makes it possible to modify the running kernel. Disable this if trusted_kernel is true. Signed-off-by: Matthew Garrett <matthew.garrett@...ula.com> --- kernel/power/user.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/power/user.c b/kernel/power/user.c index 526e891..43b7b59 100644 --- a/kernel/power/user.c +++ b/kernel/power/user.c @@ -24,6 +24,7 @@ #include <linux/console.h> #include <linux/cpu.h> #include <linux/freezer.h> +#include <linux/security.h> #include <asm/uaccess.h> @@ -49,7 +50,7 @@ static int snapshot_open(struct inode *inode, struct file *filp) struct snapshot_data *data; int error; - if (!hibernation_available()) + if (get_trusted_kernel() || !hibernation_available()) return -EPERM; lock_system_sleep(); -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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