Commit 121e38e5 authored Nov 07, 2018 by Eugeniy Paltsev Committed by Vineet Gupta Nov 12, 2018

ARC: mm: fix uninitialised signal code in do_page_fault



Commit 15773ae9 ("signal/arc: Use force_sig_fault where
appropriate") introduced undefined behaviour by leaving si_code
unitiailized and leaking random kernel values to user space.

Fixes: 15773ae9 ("signal/arc: Use force_sig_fault where appropriate")
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

parent 4592f11e

arch/arc/mm/fault.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -66,7 +66,7 @@ void do_page_fault(unsigned long address, struct pt_regs *regs)
		struct vm_area_struct *vma = NULL;
		struct task_struct *tsk = current;
		struct mm_struct *mm = tsk->mm;
		int si_code;
		int si_code = 0;
		int ret;
		vm_fault_t fault;
		int write = regs->ecr_cause & ECR_C_PROTV_STORE; /* ST/EX */

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