split ->file_mmap() into ->mmap_addr()/->mmap_file()
... i.e. file-dependent and address-dependent checks.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c
index 8430d89..8ea39aa 100644
--- a/security/apparmor/lsm.c
+++ b/security/apparmor/lsm.c
@@ -490,17 +490,9 @@
return common_file_perm(op, file, mask);
}
-static int apparmor_file_mmap(struct file *file, unsigned long reqprot,
- unsigned long prot, unsigned long flags,
- unsigned long addr, unsigned long addr_only)
+static int apparmor_mmap_file(struct file *file, unsigned long reqprot,
+ unsigned long prot, unsigned long flags)
{
- int rc = 0;
-
- /* do DAC check */
- rc = cap_mmap_addr(addr);
- if (rc || addr_only)
- return rc;
-
return common_mmap(OP_FMMAP, file, prot, flags);
}
@@ -646,7 +638,8 @@
.file_permission = apparmor_file_permission,
.file_alloc_security = apparmor_file_alloc_security,
.file_free_security = apparmor_file_free_security,
- .file_mmap = apparmor_file_mmap,
+ .mmap_file = apparmor_mmap_file,
+ .mmap_addr = cap_mmap_addr,
.file_mprotect = apparmor_file_mprotect,
.file_lock = apparmor_file_lock,
diff --git a/security/capability.c b/security/capability.c
index fca8896..61095df 100644
--- a/security/capability.c
+++ b/security/capability.c
@@ -949,7 +949,8 @@
set_to_cap_if_null(ops, file_alloc_security);
set_to_cap_if_null(ops, file_free_security);
set_to_cap_if_null(ops, file_ioctl);
- set_to_cap_if_null(ops, file_mmap);
+ set_to_cap_if_null(ops, mmap_addr);
+ set_to_cap_if_null(ops, mmap_file);
set_to_cap_if_null(ops, file_mprotect);
set_to_cap_if_null(ops, file_lock);
set_to_cap_if_null(ops, file_fcntl);
diff --git a/security/commoncap.c b/security/commoncap.c
index ebac361..6dbae46 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c
@@ -980,23 +980,8 @@
return ret;
}
-/*
- * cap_file_mmap - check if able to map given addr
- * @file: unused
- * @reqprot: unused
- * @prot: unused
- * @flags: unused
- * @addr: address attempting to be mapped
- * @addr_only: unused
- *
- * If the process is attempting to map memory below dac_mmap_min_addr they need
- * CAP_SYS_RAWIO. The other parameters to this function are unused by the
- * capability security module. Returns 0 if this mapping should be allowed
- * -EPERM if not.
- */
-int cap_file_mmap(struct file *file, unsigned long reqprot,
- unsigned long prot, unsigned long flags,
- unsigned long addr, unsigned long addr_only)
+int cap_mmap_file(struct file *file, unsigned long reqprot,
+ unsigned long prot, unsigned long flags)
{
- return cap_mmap_addr(addr);
+ return 0;
}
diff --git a/security/security.c b/security/security.c
index 5497a57..d91c66d 100644
--- a/security/security.c
+++ b/security/security.c
@@ -657,18 +657,22 @@
return security_ops->file_ioctl(file, cmd, arg);
}
-int security_file_mmap(struct file *file, unsigned long reqprot,
- unsigned long prot, unsigned long flags,
- unsigned long addr, unsigned long addr_only)
+int security_mmap_file(struct file *file, unsigned long reqprot,
+ unsigned long prot, unsigned long flags)
{
int ret;
- ret = security_ops->file_mmap(file, reqprot, prot, flags, addr, addr_only);
+ ret = security_ops->mmap_file(file, reqprot, prot, flags);
if (ret)
return ret;
return ima_file_mmap(file, prot);
}
+int security_mmap_addr(unsigned long addr)
+{
+ return security_ops->mmap_addr(addr);
+}
+
int security_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
unsigned long prot)
{
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 25c125e..372ec65 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -3083,9 +3083,7 @@
return rc;
}
-static int selinux_file_mmap(struct file *file, unsigned long reqprot,
- unsigned long prot, unsigned long flags,
- unsigned long addr, unsigned long addr_only)
+static int selinux_mmap_addr(unsigned long addr)
{
int rc = 0;
u32 sid = current_sid();
@@ -3104,10 +3102,12 @@
}
/* do DAC check on address space usage */
- rc = cap_mmap_addr(addr);
- if (rc || addr_only)
- return rc;
+ return cap_mmap_addr(addr);
+}
+static int selinux_mmap_file(struct file *file, unsigned long reqprot,
+ unsigned long prot, unsigned long flags)
+{
if (selinux_checkreqprot)
prot = reqprot;
@@ -5570,7 +5570,8 @@
.file_alloc_security = selinux_file_alloc_security,
.file_free_security = selinux_file_free_security,
.file_ioctl = selinux_file_ioctl,
- .file_mmap = selinux_file_mmap,
+ .mmap_file = selinux_mmap_file,
+ .mmap_addr = selinux_mmap_addr,
.file_mprotect = selinux_file_mprotect,
.file_lock = selinux_file_lock,
.file_fcntl = selinux_file_fcntl,
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index a621977..ee0bb57 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -1171,7 +1171,7 @@
}
/**
- * smack_file_mmap :
+ * smack_mmap_file :
* Check permissions for a mmap operation. The @file may be NULL, e.g.
* if mapping anonymous memory.
* @file contains the file structure for file to map (may be NULL).
@@ -1180,10 +1180,9 @@
* @flags contains the operational flags.
* Return 0 if permission is granted.
*/
-static int smack_file_mmap(struct file *file,
+static int smack_mmap_file(struct file *file,
unsigned long reqprot, unsigned long prot,
- unsigned long flags, unsigned long addr,
- unsigned long addr_only)
+ unsigned long flags)
{
struct smack_known *skp;
struct smack_rule *srp;
@@ -1198,11 +1197,6 @@
int tmay;
int rc;
- /* do DAC check on address space usage */
- rc = cap_mmap_addr(addr);
- if (rc || addr_only)
- return rc;
-
if (file == NULL || file->f_dentry == NULL)
return 0;
@@ -3482,7 +3476,8 @@
.file_ioctl = smack_file_ioctl,
.file_lock = smack_file_lock,
.file_fcntl = smack_file_fcntl,
- .file_mmap = smack_file_mmap,
+ .mmap_file = smack_mmap_file,
+ .mmap_addr = cap_mmap_addr,
.file_set_fowner = smack_file_set_fowner,
.file_send_sigiotask = smack_file_send_sigiotask,
.file_receive = smack_file_receive,