From: Robin Getz <[email protected]>
Gerd Hoffmann pointed out that my patch from yesterday can lead
to a null pointer dereference if the kernel is booted with no
console, and no earlyprintk defined. This fixes that issue.
printk.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
Signed-off-by: Robin Getz <[email protected]>
---
Index: linux-2.6.x/kernel/printk.c
===================================================================
--- linux-2.6.x/kernel/printk.c
+++ linux-2.6.x/kernel/printk.c
@@ -1106,10 +1106,12 @@
static int __init disable_boot_consoles(void)
{
- if (console_drivers->flags & CON_BOOT) {
- printk(KERN_INFO "turn off boot console %s%d\n",
- console_drivers->name, console_drivers->index);
- return unregister_console(console_drivers);
+ if (console_drivers != NULL) {
+ if (console_drivers->flags & CON_BOOT) {
+ printk(KERN_INFO "turn off boot console %s%d\n",
+ console_drivers->name, console_drivers->index);
+ return unregister_console(console_drivers);
+ }
}
return 0;
}
-
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