Commit bac9c66c authored by Akinobu Mita's avatar Akinobu Mita Committed by Martin Schwidefsky
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[S390] init task memory faults. 



Lock for mmap_sem is missing on page fault retry for init task
when it fails due to out of memory.

Signed-off-by: default avatarAkinobu Mita <mita@miraclelinux.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent a77c64c1

arch/s390/mm/fault.c

+1 −0
Original line number Diff line number Diff line
@@ -355,6 +355,7 @@ do_exception(struct pt_regs *regs, unsigned long error_code, int is_protection) 
	up_read(&mm->mmap_sem);

	if (tsk->pid == 1) {

		yield();

		down_read(&mm->mmap_sem);

		goto survive;

	}

	printk("VM: killing process %s\n", tsk->comm);