net/mlx5: Fix use-after-free in self-healing flow

[linux-2.6-block.git] / include / linux / sched.h

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 789923fbee3a8a8dc849c92a08ce37893e175b31..977cb57d7bc9e7183e6ca628e4f75d236ddf3951 100644 (file)
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -779,7 +779,8 @@ struct task_struct {
        struct list_head                ptrace_entry;
 
        /* PID/PID hash table linkage. */
-       struct pid_link                 pids[PIDTYPE_MAX];
+       struct pid                      *thread_pid;
+       struct hlist_node               pid_links[PIDTYPE_MAX];
        struct list_head                thread_group;
        struct list_head                thread_node;
 
@@ -853,6 +854,7 @@ struct task_struct {
 #endif
 #ifdef CONFIG_DETECT_HUNG_TASK
        unsigned long                   last_switch_count;
+       unsigned long                   last_switch_time;
 #endif
        /* Filesystem information: */
        struct fs_struct                *fs;
@@ -1209,27 +1211,7 @@ struct task_struct {
 
 static inline struct pid *task_pid(struct task_struct *task)
 {
-       return task->pids[PIDTYPE_PID].pid;
-}
-
-static inline struct pid *task_tgid(struct task_struct *task)
-{
-       return task->group_leader->pids[PIDTYPE_PID].pid;
-}
-
-/*
- * Without tasklist or RCU lock it is not safe to dereference
- * the result of task_pgrp/task_session even if task == current,
- * we can race with another thread doing sys_setsid/sys_setpgid.
- */
-static inline struct pid *task_pgrp(struct task_struct *task)
-{
-       return task->group_leader->pids[PIDTYPE_PGID].pid;
-}
-
-static inline struct pid *task_session(struct task_struct *task)
-{
-       return task->group_leader->pids[PIDTYPE_SID].pid;
+       return task->thread_pid;
 }
 
 /*
@@ -1278,7 +1260,7 @@ static inline pid_t task_tgid_nr(struct task_struct *tsk)
  */
 static inline int pid_alive(const struct task_struct *p)
 {
-       return p->pids[PIDTYPE_PID].pid != NULL;
+       return p->thread_pid != NULL;
 }
 
 static inline pid_t task_pgrp_nr_ns(struct task_struct *tsk, struct pid_namespace *ns)
@@ -1304,12 +1286,12 @@ static inline pid_t task_session_vnr(struct task_struct *tsk)
 
 static inline pid_t task_tgid_nr_ns(struct task_struct *tsk, struct pid_namespace *ns)
 {
-       return __task_pid_nr_ns(tsk, __PIDTYPE_TGID, ns);
+       return __task_pid_nr_ns(tsk, PIDTYPE_TGID, ns);
 }
 
 static inline pid_t task_tgid_vnr(struct task_struct *tsk)
 {
-       return __task_pid_nr_ns(tsk, __PIDTYPE_TGID, NULL);
+       return __task_pid_nr_ns(tsk, PIDTYPE_TGID, NULL);
 }
 
 static inline pid_t task_ppid_nr_ns(const struct task_struct *tsk, struct pid_namespace *ns)