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-rw-r--r--arch/arm/mm/alignment.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/arm/mm/alignment.c b/arch/arm/mm/alignment.c
index 4b39d867ac14..f35e69e9c65c 100644
--- a/arch/arm/mm/alignment.c
+++ b/arch/arm/mm/alignment.c
@@ -330,6 +330,9 @@ do_alignment_ldrdstrd(unsigned long addr, unsigned long instr,
{
unsigned int rd = RD_BITS(instr);
+ if (((rd & 1) == 1) || (rd == 14))
+ goto bad;
+
ai_dword += 1;
if (user_mode(regs))
@@ -361,7 +364,8 @@ do_alignment_ldrdstrd(unsigned long addr, unsigned long instr,
}
return TYPE_LDST;
-
+ bad:
+ return TYPE_ERROR;
fault:
return TYPE_FAULT;
}
@@ -663,6 +667,8 @@ do_alignment(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
else if ((instr & 0x001000f0) == 0x000000d0 || /* LDRD */
(instr & 0x001000f0) == 0x000000f0) /* STRD */
handler = do_alignment_ldrdstrd;
+ else if ((instr & 0x01f00ff0) == 0x01000090) /* SWP */
+ goto swp;
else
goto bad;
break;
@@ -733,6 +739,9 @@ do_alignment(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
do_bad_area(current, current->mm, addr, fsr, regs);
return 0;
+ swp:
+ printk(KERN_ERR "Alignment trap: not handling swp instruction\n");
+
bad:
/*
* Oops, we didn't handle the instruction.

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