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Diffstat (limited to 'src/basic/capability-util.c')
-rw-r--r--src/basic/capability-util.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/src/basic/capability-util.c b/src/basic/capability-util.c
index fef722b6f2..881f0f671e 100644
--- a/src/basic/capability-util.c
+++ b/src/basic/capability-util.c
@@ -96,7 +96,7 @@ unsigned long cap_last_cap(void) {
return p;
}
-int capability_bounding_set_drop(uint64_t drop, bool right_now) {
+int capability_bounding_set_drop(uint64_t keep, bool right_now) {
_cleanup_cap_free_ cap_t after_cap = NULL;
cap_flag_value_t fv;
unsigned long i;
@@ -137,7 +137,7 @@ int capability_bounding_set_drop(uint64_t drop, bool right_now) {
for (i = 0; i <= cap_last_cap(); i++) {
- if (drop & ((uint64_t) 1ULL << (uint64_t) i)) {
+ if (!(keep & (UINT64_C(1) << i))) {
cap_value_t v;
/* Drop it from the bounding set */
@@ -176,7 +176,7 @@ finish:
return r;
}
-static int drop_from_file(const char *fn, uint64_t drop) {
+static int drop_from_file(const char *fn, uint64_t keep) {
int r, k;
uint32_t hi, lo;
uint64_t current, after;
@@ -196,7 +196,7 @@ static int drop_from_file(const char *fn, uint64_t drop) {
return -EIO;
current = (uint64_t) lo | ((uint64_t) hi << 32ULL);
- after = current & ~drop;
+ after = current & keep;
if (current == after)
return 0;
@@ -213,14 +213,14 @@ static int drop_from_file(const char *fn, uint64_t drop) {
return r;
}
-int capability_bounding_set_drop_usermode(uint64_t drop) {
+int capability_bounding_set_drop_usermode(uint64_t keep) {
int r;
- r = drop_from_file("/proc/sys/kernel/usermodehelper/inheritable", drop);
+ r = drop_from_file("/proc/sys/kernel/usermodehelper/inheritable", keep);
if (r < 0)
return r;
- r = drop_from_file("/proc/sys/kernel/usermodehelper/bset", drop);
+ r = drop_from_file("/proc/sys/kernel/usermodehelper/bset", keep);
if (r < 0)
return r;
@@ -257,7 +257,7 @@ int drop_privileges(uid_t uid, gid_t gid, uint64_t keep_capabilities) {
return log_error_errno(errno, "Failed to disable keep capabilities flag: %m");
/* Drop all caps from the bounding set, except the ones we want */
- r = capability_bounding_set_drop(~keep_capabilities, true);
+ r = capability_bounding_set_drop(keep_capabilities, true);
if (r < 0)
return log_error_errno(r, "Failed to drop capabilities: %m");