2 files changed, 82 insertions, 5 deletions

diff --git a/include/linux/capability.h b/include/linux/capability.h
index d567af247ed8..0f1950181102 100644
--- a/include/linux/capability.h
+++ b/include/linux/capability.h
@@ -53,6 +53,7 @@ typedef struct __user_cap_data_struct {
 #define XATTR_NAME_CAPS XATTR_SECURITY_PREFIX XATTR_CAPS_SUFFIX
 
 #define VFS_CAP_REVISION_MASK   0xFF000000
+#define VFS_CAP_REVISION_SHIFT  24
 #define VFS_CAP_FLAGS_MASK      ~VFS_CAP_REVISION_MASK
 #define VFS_CAP_FLAGS_EFFECTIVE 0x000001
 
@@ -534,6 +535,10 @@ kernel_cap_t cap_set_effective(const kernel_cap_t pE_new);
 
 extern int capable(int cap);
 
+/* audit system wants to get cap info from files as well */
+struct dentry;
+extern int get_vfs_caps_from_disk(const struct dentry *dentry, struct cpu_vfs_cap_data *cpu_caps);
+
 #endif /* __KERNEL__ */
 
 #endif /* !_LINUX_CAPABILITY_H */
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index cf5bc2f5f9c3..de7e9bcba9ae 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -65,6 +65,7 @@
 #include <linux/highmem.h>
 #include <linux/syscalls.h>
 #include <linux/inotify.h>
+#include <linux/capability.h>
 
 #include "audit.h"
 
@@ -84,6 +85,15 @@ int audit_n_rules;
 /* determines whether we collect data for signals sent */
 int audit_signals;
 
+struct audit_cap_data {
+        kernel_cap_t            permitted;
+        kernel_cap_t            inheritable;
+        union {
+                unsigned int    fE;             /* effective bit of a file capability */
+                kernel_cap_t    effective;      /* effective set of a process */
+        };
+};
+
 /* When fs/namei.c:getname() is called, we store the pointer in name and
  * we don't let putname() free it (instead we free all of the saved
  * pointers at syscall exit time).
@@ -100,6 +110,8 @@ struct audit_names {
         gid_t           gid;
         dev_t           rdev;
         u32             osid;
+        struct audit_cap_data fcap;
+        unsigned int    fcap_ver;
 };
 
 struct audit_aux_data {
@@ -1171,6 +1183,35 @@ static void audit_log_execve_info(struct audit_context *context,
         kfree(buf);
 }
 
+static void audit_log_cap(struct audit_buffer *ab, char *prefix, kernel_cap_t *cap)
+{
+        int i;
+
+        audit_log_format(ab, " %s=", prefix);
+        CAP_FOR_EACH_U32(i) {
+                audit_log_format(ab, "%08x", cap->cap[(_KERNEL_CAPABILITY_U32S-1) - i]);
+        }
+}
+
+static void audit_log_fcaps(struct audit_buffer *ab, struct audit_names *name)
+{
+        kernel_cap_t *perm = &name->fcap.permitted;
+        kernel_cap_t *inh = &name->fcap.inheritable;
+        int log = 0;
+
+        if (!cap_isclear(*perm)) {
+                audit_log_cap(ab, "cap_fp", perm);
+                log = 1;
+        }
+        if (!cap_isclear(*inh)) {
+                audit_log_cap(ab, "cap_fi", inh);
+                log = 1;
+        }
+
+        if (log)
+                audit_log_format(ab, " cap_fe=%d cap_fver=%x", name->fcap.fE, name->fcap_ver);
+}
+
 static void audit_log_exit(struct audit_context *context, struct task_struct *tsk)
 {
         int i, call_panic = 0;
@@ -1421,6 +1462,8 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
                         }
                 }
 
+                audit_log_fcaps(ab, n);
+
                 audit_log_end(ab);
         }
 
@@ -1787,8 +1830,36 @@ static int audit_inc_name_count(struct audit_context *context,
         return 0;
 }
 
+
+static inline int audit_copy_fcaps(struct audit_names *name, const struct dentry *dentry)
+{
+        struct cpu_vfs_cap_data caps;
+        int rc;
+
+        memset(&name->fcap.permitted, 0, sizeof(kernel_cap_t));
+        memset(&name->fcap.inheritable, 0, sizeof(kernel_cap_t));
+        name->fcap.fE = 0;
+        name->fcap_ver = 0;
+
+        if (!dentry)
+                return 0;
+
+        rc = get_vfs_caps_from_disk(dentry, &caps);
+        if (rc)
+                return rc;
+
+        name->fcap.permitted = caps.permitted;
+        name->fcap.inheritable = caps.inheritable;
+        name->fcap.fE = !!(caps.magic_etc & VFS_CAP_FLAGS_EFFECTIVE);
+        name->fcap_ver = (caps.magic_etc & VFS_CAP_REVISION_MASK) >> VFS_CAP_REVISION_SHIFT;
+
+        return 0;
+}
+
+
 /* Copy inode data into an audit_names. */
-static void audit_copy_inode(struct audit_names *name, const struct inode *inode)
+static void audit_copy_inode(struct audit_names *name, const struct dentry *dentry,
+                             const struct inode *inode)
 {
         name->ino   = inode->i_ino;
         name->dev   = inode->i_sb->s_dev;
@@ -1797,6 +1868,7 @@ static void audit_copy_inode(struct audit_names *name, const struct inode *inode
         name->gid   = inode->i_gid;
         name->rdev  = inode->i_rdev;
         security_inode_getsecid(inode, &name->osid);
+        audit_copy_fcaps(name, dentry);
 }
 
 /**
@@ -1831,7 +1903,7 @@ void __audit_inode(const char *name, const struct dentry *dentry)
                 context->names[idx].name = NULL;
         }
         handle_path(dentry);
-        audit_copy_inode(&context->names[idx], inode);
+        audit_copy_inode(&context->names[idx], dentry, inode);
 }
 
 /**
@@ -1892,7 +1964,7 @@ void __audit_inode_child(const char *dname, const struct dentry *dentry,
                 if (!strcmp(dname, n->name) ||
                      !audit_compare_dname_path(dname, n->name, &dirlen)) {
                         if (inode)
-                                audit_copy_inode(n, inode);
+                                audit_copy_inode(n, NULL, inode);
                         else
                                 n->ino = (unsigned long)-1;
                         found_child = n->name;
@@ -1906,7 +1978,7 @@ add_names:
                         return;
                 idx = context->name_count - 1;
                 context->names[idx].name = NULL;
-                audit_copy_inode(&context->names[idx], parent);
+                audit_copy_inode(&context->names[idx], NULL, parent);
         }
 
         if (!found_child) {
@@ -1927,7 +1999,7 @@ add_names:
                 }
 
                 if (inode)
-                        audit_copy_inode(&context->names[idx], inode);
+                        audit_copy_inode(&context->names[idx], NULL, inode);
                 else
                         context->names[idx].ino = (unsigned long)-1;
         }