diff options
Diffstat (limited to 'security/selinux/hooks.c')
| -rw-r--r-- | security/selinux/hooks.c | 43 |
1 files changed, 15 insertions, 28 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index be6de0b8734f..e5ed07510309 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -136,32 +136,6 @@ static DEFINE_SPINLOCK(sb_security_lock); static struct kmem_cache *sel_inode_cache; -/* Return security context for a given sid or just the context - length if the buffer is null or length is 0 */ -static int selinux_getsecurity(u32 sid, void *buffer, size_t size) -{ - char *context; - unsigned len; - int rc; - - rc = security_sid_to_context(sid, &context, &len); - if (rc) - return rc; - - if (!buffer || !size) - goto getsecurity_exit; - - if (size < len) { - len = -ERANGE; - goto getsecurity_exit; - } - memcpy(buffer, context, len); - -getsecurity_exit: - kfree(context); - return len; -} - /** * selinux_secmark_enabled - Check to see if SECMARK is currently enabled * @@ -2675,14 +2649,27 @@ static int selinux_inode_removexattr (struct dentry *dentry, char *name) * * Permission check is handled by selinux_inode_getxattr hook. */ -static int selinux_inode_getsecurity(const struct inode *inode, const char *name, void *buffer, size_t size, int err) +static int selinux_inode_getsecurity(const struct inode *inode, const char *name, void **buffer, bool alloc) { + u32 size; + int error; + char *context = NULL; struct inode_security_struct *isec = inode->i_security; if (strcmp(name, XATTR_SELINUX_SUFFIX)) return -EOPNOTSUPP; - return selinux_getsecurity(isec->sid, buffer, size); + error = security_sid_to_context(isec->sid, &context, &size); + if (error) + return error; + error = size; + if (alloc) { + *buffer = context; + goto out_nofree; + } + kfree(context); +out_nofree: + return error; } static int selinux_inode_setsecurity(struct inode *inode, const char *name, |