diff options
| -rw-r--r-- | block/ioprio.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/block/ioprio.c b/block/ioprio.c index 364d2294ba90..bee628f9f1b2 100644 --- a/block/ioprio.c +++ b/block/ioprio.c @@ -119,11 +119,17 @@ SYSCALL_DEFINE3(ioprio_set, int, which, int, who, int, ioprio) pgrp = task_pgrp(current); else pgrp = find_vpid(who); + + read_lock(&tasklist_lock); do_each_pid_thread(pgrp, PIDTYPE_PGID, p) { ret = set_task_ioprio(p, ioprio); - if (ret) - break; + if (ret) { + read_unlock(&tasklist_lock); + goto out; + } } while_each_pid_thread(pgrp, PIDTYPE_PGID, p); + read_unlock(&tasklist_lock); + break; case IOPRIO_WHO_USER: uid = make_kuid(current_user_ns(), who); @@ -153,6 +159,7 @@ free_uid: ret = -EINVAL; } +out: rcu_read_unlock(); return ret; } |