Title: [7193] branches/2009R1/arch/blackfin/kernel/traps.c: Fix [#4564] on the branch - make sure we check things are valid before
- Revision
- 7193
- Author
- rgetz
- Date
- 2009-08-14 06:30:05 -0400 (Fri, 14 Aug 2009)
Log Message
Fix [#4564] on the branch - make sure we check things are valid before
we read them.
Modified Paths
Diff
Modified: branches/2009R1/arch/blackfin/kernel/traps.c (7192 => 7193)
--- branches/2009R1/arch/blackfin/kernel/traps.c 2009-08-14 03:13:02 UTC (rev 7192)
+++ branches/2009R1/arch/blackfin/kernel/traps.c 2009-08-14 10:30:05 UTC (rev 7193)
@@ -634,6 +634,10 @@
if (addr > (addr + 2))
return false;
+ /* check for valid memory */
+ if (!access_ok(VERIFY_READ, addr, 2) && !core_kernel_text(addr))
+ return false;
+
/*
* Since we are in exception context, we need to do a little address checking
* We need to make sure we are only accessing valid memory, and
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