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-rw-r--r--drivers/tty/vt/vc_screen.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/tty/vt/vc_screen.c b/drivers/tty/vt/vc_screen.c
index a672ed192d3..3c27c4bc604 100644
--- a/drivers/tty/vt/vc_screen.c
+++ b/drivers/tty/vt/vc_screen.c
@@ -159,7 +159,13 @@ static loff_t vcs_lseek(struct file *file, loff_t offset, int orig)
int size;
mutex_lock(&con_buf_mtx);
+ console_lock();
size = vcs_size(file->f_path.dentry->d_inode);
+ console_unlock();
+ if (size < 0) {
+ mutex_unlock(&con_buf_mtx);
+ return size;
+ }
switch (orig) {
default:
mutex_unlock(&con_buf_mtx);
@@ -237,6 +243,12 @@ vcs_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
* could sleep.
*/
size = vcs_size(inode);
+ if (size < 0) {
+ if (read)
+ break;
+ ret = size;
+ goto unlock_out;
+ }
if (pos >= size)
break;
if (count > size - pos)
@@ -436,6 +448,12 @@ vcs_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
* Return data written up to now on failure.
*/
size = vcs_size(inode);
+ if (size < 0) {
+ if (written)
+ break;
+ ret = size;
+ goto unlock_out;
+ }
if (pos >= size)
break;
if (this_round > size - pos)