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authorDavid Quigley <dpquigl@tycho.nsa.gov>2006-06-30 01:55:46 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-30 11:25:36 -0700
commitf9008e4c5c525941967b67777945aa6266ab6326 (patch)
treea0c9436485b80d548ef74d5f1aec0f6d0309af6e /include
parented11d9eb2228acc483c819ab353e3c41bcb158fa (diff)
[PATCH] SELinux: extend task_kill hook to handle signals sent by AIO completion
This patch extends the security_task_kill hook to handle signals sent by AIO completion. In this case, the secid of the task responsible for the signal needs to be obtained and saved earlier, so a security_task_getsecid() hook is added, and then this saved value is passed subsequently to the extended task_kill hook for use in checking. Signed-off-by: David Quigley <dpquigl@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org> Cc: Stephen Smalley <sds@tycho.nsa.gov> Cc: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/security.h23
1 files changed, 19 insertions, 4 deletions
diff --git a/include/linux/security.h b/include/linux/security.h
index c7ea15716dce..d4b13d617f63 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -567,6 +567,9 @@ struct swap_info_struct;
* @p.
* @p contains the task_struct for the process.
* Return 0 if permission is granted.
+ * @task_getsecid:
+ * Retrieve the security identifier of the process @p.
+ * @p contains the task_struct for the process and place is into @secid.
* @task_setgroups:
* Check permission before setting the supplementary group set of the
* current process.
@@ -615,6 +618,7 @@ struct swap_info_struct;
* @p contains the task_struct for process.
* @info contains the signal information.
* @sig contains the signal value.
+ * @secid contains the sid of the process where the signal originated
* Return 0 if permission is granted.
* @task_wait:
* Check permission before allowing a process to reap a child process @p
@@ -1219,6 +1223,7 @@ struct security_operations {
int (*task_setpgid) (struct task_struct * p, pid_t pgid);
int (*task_getpgid) (struct task_struct * p);
int (*task_getsid) (struct task_struct * p);
+ void (*task_getsecid) (struct task_struct * p, u32 * secid);
int (*task_setgroups) (struct group_info *group_info);
int (*task_setnice) (struct task_struct * p, int nice);
int (*task_setioprio) (struct task_struct * p, int ioprio);
@@ -1228,7 +1233,7 @@ struct security_operations {
int (*task_getscheduler) (struct task_struct * p);
int (*task_movememory) (struct task_struct * p);
int (*task_kill) (struct task_struct * p,
- struct siginfo * info, int sig);
+ struct siginfo * info, int sig, u32 secid);
int (*task_wait) (struct task_struct * p);
int (*task_prctl) (int option, unsigned long arg2,
unsigned long arg3, unsigned long arg4,
@@ -1839,6 +1844,11 @@ static inline int security_task_getsid (struct task_struct *p)
return security_ops->task_getsid (p);
}
+static inline void security_task_getsecid (struct task_struct *p, u32 *secid)
+{
+ security_ops->task_getsecid (p, secid);
+}
+
static inline int security_task_setgroups (struct group_info *group_info)
{
return security_ops->task_setgroups (group_info);
@@ -1878,9 +1888,10 @@ static inline int security_task_movememory (struct task_struct *p)
}
static inline int security_task_kill (struct task_struct *p,
- struct siginfo *info, int sig)
+ struct siginfo *info, int sig,
+ u32 secid)
{
- return security_ops->task_kill (p, info, sig);
+ return security_ops->task_kill (p, info, sig, secid);
}
static inline int security_task_wait (struct task_struct *p)
@@ -2491,6 +2502,9 @@ static inline int security_task_getsid (struct task_struct *p)
return 0;
}
+static inline void security_task_getsecid (struct task_struct *p, u32 *secid)
+{ }
+
static inline int security_task_setgroups (struct group_info *group_info)
{
return 0;
@@ -2530,7 +2544,8 @@ static inline int security_task_movememory (struct task_struct *p)
}
static inline int security_task_kill (struct task_struct *p,
- struct siginfo *info, int sig)
+ struct siginfo *info, int sig,
+ u32 secid)
{
return 0;
}