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-rw-r--r--fs/ioprio.c18
1 files changed, 14 insertions, 4 deletions
diff --git a/fs/ioprio.c b/fs/ioprio.c
index 0f1b951..8e35e96 100644
--- a/fs/ioprio.c
+++ b/fs/ioprio.c
@@ -65,6 +65,7 @@ SYSCALL_DEFINE3(ioprio_set, int, which, int, who, int, ioprio)
struct task_struct *p, *g;
struct user_struct *user;
struct pid *pgrp;
+ kuid_t uid;
int ret;
switch (class) {
@@ -110,16 +111,21 @@ SYSCALL_DEFINE3(ioprio_set, int, which, int, who, int, ioprio)
} while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
break;
case IOPRIO_WHO_USER:
+ uid = make_kuid(current_user_ns(), who);
+ if (!uid_valid(uid))
+ break;
if (!who)
user = current_user();
else
- user = find_user(who);
+ user = find_user(uid);
if (!user)
break;
do_each_thread(g, p) {
- if (__task_cred(p)->uid != who)
+ const struct cred *tcred = __task_cred(p);
+ kuid_t tcred_uid = make_kuid(tcred->user_ns, tcred->uid);
+ if (!uid_eq(tcred_uid, uid))
continue;
ret = set_task_ioprio(p, ioprio);
if (ret)
@@ -174,6 +180,7 @@ SYSCALL_DEFINE2(ioprio_get, int, which, int, who)
struct task_struct *g, *p;
struct user_struct *user;
struct pid *pgrp;
+ kuid_t uid;
int ret = -ESRCH;
int tmpio;
@@ -203,16 +210,19 @@ SYSCALL_DEFINE2(ioprio_get, int, which, int, who)
} while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
break;
case IOPRIO_WHO_USER:
+ uid = make_kuid(current_user_ns(), who);
if (!who)
user = current_user();
else
- user = find_user(who);
+ user = find_user(uid);
if (!user)
break;
do_each_thread(g, p) {
- if (__task_cred(p)->uid != user->uid)
+ const struct cred *tcred = __task_cred(p);
+ kuid_t tcred_uid = make_kuid(tcred->user_ns, tcred->uid);
+ if (!uid_eq(tcred_uid, user->uid))
continue;
tmpio = get_task_ioprio(p);
if (tmpio < 0)
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