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authorTyler Hicks <tyhicks@canonical.com>2018-05-04 01:08:13 +0000
committerPaul Moore <paul@paul-moore.com>2018-05-08 02:02:25 -0400
commitbeb44acaf000c97d6c89de581f377df5757857f3 (patch)
tree05a59c7f4291d3d71762628564b7aac13f099d3e /kernel/seccomp.c
parentd013db029491b49e1459d5a55ecd9ec1be1447ca (diff)
seccomp: Configurable separator for the actions_logged string
The function that converts a bitmask of seccomp actions that are allowed to be logged is currently only used for constructing the display string for the kernel.seccomp.actions_logged sysctl. That string wants a space character to be used for the separator between actions. A future patch will make use of the same function for building a string that will be sent to the audit subsystem for tracking modifications to the kernel.seccomp.actions_logged sysctl. That string will need to use a comma as a separator. This patch allows the separator character to be configurable to meet both needs. Signed-off-by: Tyler Hicks <tyhicks@canonical.com> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'kernel/seccomp.c')
-rw-r--r--kernel/seccomp.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/kernel/seccomp.c b/kernel/seccomp.c
index f4afe6790e4c..b36ac1e0cd0e 100644
--- a/kernel/seccomp.c
+++ b/kernel/seccomp.c
@@ -1135,10 +1135,11 @@ static const struct seccomp_log_name seccomp_log_names[] = {
};
static bool seccomp_names_from_actions_logged(char *names, size_t size,
- u32 actions_logged)
+ u32 actions_logged,
+ const char *sep)
{
const struct seccomp_log_name *cur;
- bool append_space = false;
+ bool append_sep = false;
for (cur = seccomp_log_names; cur->name && size; cur++) {
ssize_t ret;
@@ -1146,15 +1147,15 @@ static bool seccomp_names_from_actions_logged(char *names, size_t size,
if (!(actions_logged & cur->log))
continue;
- if (append_space) {
- ret = strscpy(names, " ", size);
+ if (append_sep) {
+ ret = strscpy(names, sep, size);
if (ret < 0)
return false;
names += ret;
size -= ret;
} else
- append_space = true;
+ append_sep = true;
ret = strscpy(names, cur->name, size);
if (ret < 0)
@@ -1208,7 +1209,7 @@ static int read_actions_logged(struct ctl_table *ro_table, void __user *buffer,
memset(names, 0, sizeof(names));
if (!seccomp_names_from_actions_logged(names, sizeof(names),
- seccomp_actions_logged))
+ seccomp_actions_logged, " "))
return -EINVAL;
table = *ro_table;