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Commit 121e38e5 authored by Eugeniy Paltsev's avatar Eugeniy Paltsev Committed by Vineet Gupta
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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: default avatarEugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: default avatarVineet 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 */