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authorMimi Zohar <zohar@linux.vnet.ibm.com>2015-11-19 20:39:22 +0300
committerMimi Zohar <zohar@linux.vnet.ibm.com>2016-02-21 16:55:00 +0300
commit09596b94f7d28595602482e69ed954deab707437 (patch)
tree7d981522e638fdc0570f3715c9786c6f1a306e05 /fs/exec.c
parentcf2222178645e545e96717b2825601321ce4745c (diff)
downloadlinux-09596b94f7d28595602482e69ed954deab707437.tar.xz
vfs: define kernel_read_file_from_path
This patch defines kernel_read_file_from_path(), a wrapper for the VFS common kernel_read_file(). Changelog: - revert error msg regression - reported by Sergey Senozhatsky - Separated from the IMA patch Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com> Acked-by: Kees Cook <keescook@chromium.org> Acked-by: Luis R. Rodriguez <mcgrof@kernel.org> Cc: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/exec.c')
-rw-r--r--fs/exec.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/fs/exec.c b/fs/exec.c
index 1138dc502c77..64cb3bc788c1 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -884,6 +884,25 @@ out:
}
EXPORT_SYMBOL_GPL(kernel_read_file);
+int kernel_read_file_from_path(char *path, void **buf, loff_t *size,
+ loff_t max_size, enum kernel_read_file_id id)
+{
+ struct file *file;
+ int ret;
+
+ if (!path || !*path)
+ return -EINVAL;
+
+ file = filp_open(path, O_RDONLY, 0);
+ if (IS_ERR(file))
+ return PTR_ERR(file);
+
+ ret = kernel_read_file(file, buf, size, max_size, id);
+ fput(file);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(kernel_read_file_from_path);
+
ssize_t read_code(struct file *file, unsigned long addr, loff_t pos, size_t len)
{
ssize_t res = vfs_read(file, (void __user *)addr, len, &pos);