[patch] Patch to fix issue

0001-fs-generic_file_llseek_size-should-recognize-invalid.patch (text/plain), 1.14 KB, created by Richard Yao (RETIRED) on 2013-06-16 01:10:45 UTC

From fa05d85147f0932e7d0e347bab598c7ad2d11757 Mon Sep 17 00:00:00 2001
From: Richard Yao <[e-mail]>
Date: Sat, 15 Jun 2013 20:48:38 -0400
Subject: [PATCH] fs: generic_file_llseek_size() should recognize invalid
 whence values

generic_file_llseek_size() handles whence values in a switch statement,
but it lacks cases for both SEEK_SET and invalid values. This causes it
to treat all invalid whence values as SEEK_SET, which is wrong.

We fix that by adding a case for SEEK_SET and a default case.

Signed-off-by: Richard Yao <[e-mail]>
---
 fs/read_write.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/read_write.c b/fs/read_write.c
index 0343000..54b8808 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -81,6 +81,7 @@ generic_file_llseek_size(struct file *file, loff_t offset, int whence,
 	switch (whence) {
 	case SEEK_END:
 		offset += eof;
+	case SEEK_SET:
 		break;
 	case SEEK_CUR:
 		/*
@@ -118,6 +119,8 @@ generic_file_llseek_size(struct file *file, loff_t offset, int whence,
 			return -ENXIO;
 		offset = eof;
 		break;
+	default:
+		return -EINVAL;
 	}
 
 	return lseek_execute(file, inode, offset, maxsize);
-- 
1.8.1.5