summaryrefslogtreecommitdiff
path: root/kernel/printk
diff options
context:
space:
mode:
authorSebastian Schmidt <yath@yath.de>2014-10-19 22:05:15 +0400
committerTony Luck <tony.luck@intel.com>2014-11-05 20:59:48 +0300
commit68c4a4f8abc60c9440ede9cd123d48b78325f7a3 (patch)
treeef8aefb7d8c3769204116ff65cfa48551464a275 /kernel/printk
parenta28726b4fb624f81d637a8afb9ea12fc16500f61 (diff)
downloadlinux-68c4a4f8abc60c9440ede9cd123d48b78325f7a3.tar.xz
pstore: Honor dmesg_restrict sysctl on dmesg dumps
When the kernel.dmesg_restrict restriction is in place, only users with CAP_SYSLOG should be able to access crash dumps (like: attacker is trying to exploit a bug, watchdog reboots, attacker can happily read crash dumps and logs). This puts the restriction on console-* types as well as sensitive information could have been leaked there. Other log types are unaffected. Signed-off-by: Sebastian Schmidt <yath@yath.de> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'kernel/printk')
-rw-r--r--kernel/printk/printk.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index ced2b84b1cb7..c8755e7e1dba 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -480,7 +480,7 @@ static int syslog_action_restricted(int type)
type != SYSLOG_ACTION_SIZE_BUFFER;
}
-static int check_syslog_permissions(int type, bool from_file)
+int check_syslog_permissions(int type, bool from_file)
{
/*
* If this is from /proc/kmsg and we've already opened it, then we've