diff options
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/mem.c | 10 | ||||
| -rw-r--r-- | drivers/char/ppdev.c | 13 |
2 files changed, 12 insertions, 11 deletions
diff --git a/drivers/char/mem.c b/drivers/char/mem.c index 5bb1985ec484..6d9cc2d39d22 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -381,9 +381,6 @@ static ssize_t read_kmem(struct file *file, char __user *buf, char *kbuf; /* k-addr because vread() takes vmlist_lock rwlock */ int err = 0; - if (!pfn_valid(PFN_DOWN(p))) - return -EIO; - read = 0; if (p < (unsigned long) high_memory) { low_count = count; @@ -412,6 +409,8 @@ static ssize_t read_kmem(struct file *file, char __user *buf, * by the kernel or data corruption may occur */ kbuf = xlate_dev_kmem_ptr((void *)p); + if (!virt_addr_valid(kbuf)) + return -ENXIO; if (copy_to_user(buf, kbuf, sz)) return -EFAULT; @@ -482,6 +481,8 @@ static ssize_t do_write_kmem(unsigned long p, const char __user *buf, * corruption may occur. */ ptr = xlate_dev_kmem_ptr((void *)p); + if (!virt_addr_valid(ptr)) + return -ENXIO; copied = copy_from_user(ptr, buf, sz); if (copied) { @@ -512,9 +513,6 @@ static ssize_t write_kmem(struct file *file, const char __user *buf, char *kbuf; /* k-addr because vwrite() takes vmlist_lock rwlock */ int err = 0; - if (!pfn_valid(PFN_DOWN(p))) - return -EIO; - if (p < (unsigned long) high_memory) { unsigned long to_write = min_t(unsigned long, count, (unsigned long)high_memory - p); diff --git a/drivers/char/ppdev.c b/drivers/char/ppdev.c index 02819e0703c8..87885d146dbb 100644 --- a/drivers/char/ppdev.c +++ b/drivers/char/ppdev.c @@ -290,6 +290,7 @@ static int register_device(int minor, struct pp_struct *pp) struct pardevice *pdev = NULL; char *name; struct pardev_cb ppdev_cb; + int rc = 0; name = kasprintf(GFP_KERNEL, CHRDEV "%x", minor); if (name == NULL) @@ -298,8 +299,8 @@ static int register_device(int minor, struct pp_struct *pp) port = parport_find_number(minor); if (!port) { pr_warn("%s: no associated port!\n", name); - kfree(name); - return -ENXIO; + rc = -ENXIO; + goto err; } memset(&ppdev_cb, 0, sizeof(ppdev_cb)); @@ -308,16 +309,18 @@ static int register_device(int minor, struct pp_struct *pp) ppdev_cb.private = pp; pdev = parport_register_dev_model(port, name, &ppdev_cb, minor); parport_put_port(port); - kfree(name); if (!pdev) { pr_warn("%s: failed to register device!\n", name); - return -ENXIO; + rc = -ENXIO; + goto err; } pp->pdev = pdev; dev_dbg(&pdev->dev, "registered pardevice\n"); - return 0; +err: + kfree(name); + return rc; } static enum ieee1284_phase init_phase(int mode) |