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-rw-r--r--security/commoncap.c3
-rw-r--r--security/dummy.c3
-rw-r--r--security/security.c5
-rw-r--r--security/selinux/hooks.c13
-rw-r--r--security/smack/smack_lsm.c5
5 files changed, 21 insertions, 8 deletions
diff --git a/security/commoncap.c b/security/commoncap.c
index 33d343308413..0b6537a3672d 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -63,7 +63,8 @@ int cap_settime(struct timespec *ts, struct timezone *tz)
return 0;
}
-int cap_ptrace (struct task_struct *parent, struct task_struct *child)
+int cap_ptrace (struct task_struct *parent, struct task_struct *child,
+ unsigned int mode)
{
/* Derived from arch/i386/kernel/ptrace.c:sys_ptrace. */
if (!cap_issubset(child->cap_permitted, parent->cap_permitted) &&
diff --git a/security/dummy.c b/security/dummy.c
index b8916883b77f..1db712d99dc7 100644
--- a/security/dummy.c
+++ b/security/dummy.c
@@ -30,7 +30,8 @@
#include <linux/prctl.h>
#include <linux/securebits.h>
-static int dummy_ptrace (struct task_struct *parent, struct task_struct *child)
+static int dummy_ptrace (struct task_struct *parent, struct task_struct *child,
+ unsigned int mode)
{
return 0;
}
diff --git a/security/security.c b/security/security.c
index 59838a99b80e..c4507ce2a5a0 100644
--- a/security/security.c
+++ b/security/security.c
@@ -161,9 +161,10 @@ int mod_reg_security(const char *name, struct security_operations *ops)
/* Security operations */
-int security_ptrace(struct task_struct *parent, struct task_struct *child)
+int security_ptrace(struct task_struct *parent, struct task_struct *child,
+ unsigned int mode)
{
- return security_ops->ptrace(parent, child);
+ return security_ops->ptrace(parent, child, mode);
}
int security_capget(struct task_struct *target,
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index eca70f42e678..4be156334b22 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -1686,14 +1686,23 @@ static inline u32 file_to_av(struct file *file)
/* Hook functions begin here. */
-static int selinux_ptrace(struct task_struct *parent, struct task_struct *child)
+static int selinux_ptrace(struct task_struct *parent,
+ struct task_struct *child,
+ unsigned int mode)
{
int rc;
- rc = secondary_ops->ptrace(parent, child);
+ rc = secondary_ops->ptrace(parent, child, mode);
if (rc)
return rc;
+ if (mode == PTRACE_MODE_READ) {
+ struct task_security_struct *tsec = parent->security;
+ struct task_security_struct *csec = child->security;
+ return avc_has_perm(tsec->sid, csec->sid,
+ SECCLASS_FILE, FILE__READ, NULL);
+ }
+
return task_has_perm(parent, child, PROCESS__PTRACE);
}
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 4a09293efa00..3c7150b3493d 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -95,11 +95,12 @@ struct inode_smack *new_inode_smack(char *smack)
*
* Do the capability checks, and require read and write.
*/
-static int smack_ptrace(struct task_struct *ptp, struct task_struct *ctp)
+static int smack_ptrace(struct task_struct *ptp, struct task_struct *ctp,
+ unsigned int mode)
{
int rc;
- rc = cap_ptrace(ptp, ctp);
+ rc = cap_ptrace(ptp, ctp, mode);
if (rc != 0)
return rc;