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ARC: mm: fix uninitialised signal code in do_page_fault 

Commit 15773ae938 ("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: 15773ae938 ("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>
This commit is contained in:
Eugeniy Paltsev 2018-11-07 15:12:49 +03:00 committed by Vineet Gupta
parent 4592f11e47
commit 121e38e5ac
1 changed files with 1 additions and 1 deletions
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2
arch/arc/mm/fault.c
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@ -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 */