1 files changed, 15 insertions, 43 deletions

diff --git a/kernel/module/main.c b/kernel/module/main.c
index b4c7e925fdb0..044aa2c9e3cb 100644
--- a/kernel/module/main.c
+++ b/kernel/module/main.c
@@ -3057,13 +3057,25 @@ SYSCALL_DEFINE3(init_module, void __user *, umod,
 	return load_module(&info, uargs, 0);
 }
 
-static int file_init_module(struct file *file, const char __user * uargs, int flags)
+SYSCALL_DEFINE3(finit_module, int, fd, const char __user *, uargs, int, flags)
 {
 	struct load_info info = { };
 	void *buf = NULL;
 	int len;
+	int err;
+
+	err = may_init_module();
+	if (err)
+		return err;
+
+	pr_debug("finit_module: fd=%d, uargs=%p, flags=%i\n", fd, uargs, flags);
 
-	len = kernel_read_file(file, 0, &buf, INT_MAX, NULL,
+	if (flags & ~(MODULE_INIT_IGNORE_MODVERSIONS
+		      |MODULE_INIT_IGNORE_VERMAGIC
+		      |MODULE_INIT_COMPRESSED_FILE))
+		return -EINVAL;
+
+	len = kernel_read_file_from_fd(fd, 0, &buf, INT_MAX, NULL,
 				       READING_MODULE);
 	if (len < 0) {
 		mod_stat_inc(&failed_kreads);
@@ -3072,7 +3084,7 @@ static int file_init_module(struct file *file, const char __user * uargs, int fl
 	}
 
 	if (flags & MODULE_INIT_COMPRESSED_FILE) {
-		int err = module_decompress(&info, buf, len);
+		err = module_decompress(&info, buf, len);
 		vfree(buf); /* compressed data is no longer needed */
 		if (err) {
 			mod_stat_inc(&failed_decompress);
@@ -3087,46 +3099,6 @@ static int file_init_module(struct file *file, const char __user * uargs, int fl
 	return load_module(&info, uargs, flags);
 }
 
-/*
- * kernel_read_file() will already deny write access, but module
- * loading wants _exclusive_ access to the file, so we do that
- * here, along with basic sanity checks.
- */
-static int prepare_file_for_module_load(struct file *file)
-{
-	if (!file || !(file->f_mode & FMODE_READ))
-		return -EBADF;
-	if (!S_ISREG(file_inode(file)->i_mode))
-		return -EINVAL;
-	return exclusive_deny_write_access(file);
-}
-
-SYSCALL_DEFINE3(finit_module, int, fd, const char __user *, uargs, int, flags)
-{
-	struct fd f;
-	int err;
-
-	err = may_init_module();
-	if (err)
-		return err;
-
-	pr_debug("finit_module: fd=%d, uargs=%p, flags=%i\n", fd, uargs, flags);
-
-	if (flags & ~(MODULE_INIT_IGNORE_MODVERSIONS
-		      |MODULE_INIT_IGNORE_VERMAGIC
-		      |MODULE_INIT_COMPRESSED_FILE))
-		return -EINVAL;
-
-	f = fdget(fd);
-	err = prepare_file_for_module_load(f.file);
-	if (!err) {
-		err = file_init_module(f.file, uargs, flags);
-		allow_write_access(f.file);
-	}
-	fdput(f);
-	return err;
-}
-
 /* Keep in sync with MODULE_FLAGS_BUF_SIZE !!! */
 char *module_flags(struct module *mod, char *buf, bool show_state)
 {