diff options
Diffstat (limited to 'drivers/tty/vt/vc_screen.c')
| -rw-r--r-- | drivers/tty/vt/vc_screen.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/tty/vt/vc_screen.c b/drivers/tty/vt/vc_screen.c index 1dc07f9214d5..829c4be66f3b 100644 --- a/drivers/tty/vt/vc_screen.c +++ b/drivers/tty/vt/vc_screen.c @@ -656,10 +656,17 @@ vcs_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) } } - /* The vcs_size might have changed while we slept to grab - * the user buffer, so recheck. + /* The vc might have been freed or vcs_size might have changed + * while we slept to grab the user buffer, so recheck. * Return data written up to now on failure. */ + vc = vcs_vc(inode, &viewed); + if (!vc) { + if (written) + break; + ret = -ENXIO; + goto unlock_out; + } size = vcs_size(vc, attr, false); if (size < 0) { if (written) @@ -804,7 +811,7 @@ int __init vcs_init(void) if (register_chrdev(VCS_MAJOR, "vcs", &vcs_fops)) panic("unable to get major %d for vcs device", VCS_MAJOR); - vc_class = class_create(THIS_MODULE, "vc"); + vc_class = class_create("vc"); device_create(vc_class, NULL, MKDEV(VCS_MAJOR, 0), NULL, "vcs"); device_create(vc_class, NULL, MKDEV(VCS_MAJOR, 64), NULL, "vcsu"); |