When DEBUG is enabled, do_page_fault() may dereference a NULL pointer, causing recursive bus errors.
Signed-off-by: Geert Uytterhoeven <[email protected]> --- 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 eb1d61f68725..c7725f1de05d 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 /* -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
