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Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/lp.c6
-rw-r--r--drivers/char/mem.c5
-rw-r--r--drivers/char/pcmcia/cm4040_cs.c6
-rw-r--r--drivers/char/random.c6
4 files changed, 18 insertions, 5 deletions
diff --git a/drivers/char/lp.c b/drivers/char/lp.c
index 565e4cf04a02..8249762192d5 100644
--- a/drivers/char/lp.c
+++ b/drivers/char/lp.c
@@ -859,7 +859,11 @@ static int __init lp_setup (char *str)
} else if (!strcmp(str, "auto")) {
parport_nr[0] = LP_PARPORT_AUTO;
} else if (!strcmp(str, "none")) {
- parport_nr[parport_ptr++] = LP_PARPORT_NONE;
+ if (parport_ptr < LP_NO)
+ parport_nr[parport_ptr++] = LP_PARPORT_NONE;
+ else
+ printk(KERN_INFO "lp: too many ports, %s ignored.\n",
+ str);
} else if (!strcmp(str, "reset")) {
reset = 1;
}
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 7e4a9d1296bb..6e0cbe092220 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -340,6 +340,11 @@ static const struct vm_operations_struct mmap_mem_ops = {
static int mmap_mem(struct file *file, struct vm_area_struct *vma)
{
size_t size = vma->vm_end - vma->vm_start;
+ phys_addr_t offset = (phys_addr_t)vma->vm_pgoff << PAGE_SHIFT;
+
+ /* It's illegal to wrap around the end of the physical address space. */
+ if (offset + (phys_addr_t)size < offset)
+ return -EINVAL;
if (!valid_mmap_phys_addr_range(vma->vm_pgoff, size))
return -EINVAL;
diff --git a/drivers/char/pcmcia/cm4040_cs.c b/drivers/char/pcmcia/cm4040_cs.c
index d4dbd8d8e524..382c864814d9 100644
--- a/drivers/char/pcmcia/cm4040_cs.c
+++ b/drivers/char/pcmcia/cm4040_cs.c
@@ -374,7 +374,7 @@ static ssize_t cm4040_write(struct file *filp, const char __user *buf,
rc = write_sync_reg(SCR_HOST_TO_READER_START, dev);
if (rc <= 0) {
- DEBUGP(5, dev, "write_sync_reg c=%.2Zx\n", rc);
+ DEBUGP(5, dev, "write_sync_reg c=%.2zx\n", rc);
DEBUGP(2, dev, "<- cm4040_write (failed)\n");
if (rc == -ERESTARTSYS)
return rc;
@@ -387,7 +387,7 @@ static ssize_t cm4040_write(struct file *filp, const char __user *buf,
for (i = 0; i < bytes_to_write; i++) {
rc = wait_for_bulk_out_ready(dev);
if (rc <= 0) {
- DEBUGP(5, dev, "wait_for_bulk_out_ready rc=%.2Zx\n",
+ DEBUGP(5, dev, "wait_for_bulk_out_ready rc=%.2zx\n",
rc);
DEBUGP(2, dev, "<- cm4040_write (failed)\n");
if (rc == -ERESTARTSYS)
@@ -403,7 +403,7 @@ static ssize_t cm4040_write(struct file *filp, const char __user *buf,
rc = write_sync_reg(SCR_HOST_TO_READER_DONE, dev);
if (rc <= 0) {
- DEBUGP(5, dev, "write_sync_reg c=%.2Zx\n", rc);
+ DEBUGP(5, dev, "write_sync_reg c=%.2zx\n", rc);
DEBUGP(2, dev, "<- cm4040_write (failed)\n");
if (rc == -ERESTARTSYS)
return rc;
diff --git a/drivers/char/random.c b/drivers/char/random.c
index 0ab024918907..a561f0c2f428 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1097,12 +1097,16 @@ static void add_interrupt_bench(cycles_t start)
static __u32 get_reg(struct fast_pool *f, struct pt_regs *regs)
{
__u32 *ptr = (__u32 *) regs;
+ unsigned long flags;
if (regs == NULL)
return 0;
+ local_irq_save(flags);
if (f->reg_idx >= sizeof(struct pt_regs) / sizeof(__u32))
f->reg_idx = 0;
- return *(ptr + f->reg_idx++);
+ ptr += f->reg_idx++;
+ local_irq_restore(flags);
+ return *ptr;
}
void add_interrupt_randomness(int irq, int irq_flags)