diff options
Diffstat (limited to 'drivers/tty/vt/selection.c')
| -rw-r--r-- | drivers/tty/vt/selection.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/tty/vt/selection.c b/drivers/tty/vt/selection.c index e172ede235a0..91d789c025c6 100644 --- a/drivers/tty/vt/selection.c +++ b/drivers/tty/vt/selection.c @@ -113,15 +113,22 @@ static inline int inword(const u32 c) * sel_loadlut() - load the LUT table * @lut: user table * - * Load the LUT table from user space. The caller must hold the console - * lock. Make a temporary copy so a partial update doesn't make a mess. + * Load the LUT table from user space. Make a temporary copy so a partial + * update doesn't make a mess. + * + * Locking: The console lock is acquired. */ int sel_loadlut(u32 __user *lut) { u32 tmplut[ARRAY_SIZE(inwordLut)]; + if (copy_from_user(tmplut, lut, sizeof(inwordLut))) return -EFAULT; + + console_lock(); memcpy(inwordLut, tmplut, sizeof(inwordLut)); + console_unlock(); + return 0; } |