From: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> This patch has been added to the 3.12 stable tree. If you have any objections, please let us know. =============== commit 4e25c0e92f8eaf69bc51d1d523bcb7268e7dd162 upstream. When DEBUG is enabled, do_page_fault() may dereference a NULL pointer, causing recursive bus errors. Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> Cc: Oliver Neukum <ONeukum@xxxxxxxx> Signed-off-by: Jiri Slaby <jslaby@xxxxxxx> --- arch/m68k/mm/fault.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/m68k/mm/fault.c b/arch/m68k/mm/fault.c index f0eef0491f77..97136b5e47e0 100644 --- a/arch/m68k/mm/fault.c +++ b/arch/m68k/mm/fault.c @@ -77,8 +77,7 @@ int do_page_fault(struct pt_regs *regs, unsigned long address, #ifdef DEBUG printk ("do page fault:\nregs->sr=%#x, regs->pc=%#lx, address=%#lx, %ld, %p\n", - regs->sr, regs->pc, address, error_code, - current->mm->pgd); + regs->sr, regs->pc, address, error_code, mm ? mm->pgd : NULL); #endif /* -- 2.7.0 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html