File kdumpid-x86-out-of-bounds-disas.patch of Package kdumpid

Date: Tue Nov 4 00:15:37 2014 +0100
From: Petr Tesarik <petr@tesarici.cz>
Subject: x86: Prevent out-of-bounds reads in disas_at()
Patch-mainline: v1.1
Git-commit: a6baa2d02f125fd76f4ece14bea9d922e19b10e3

Since the buffer_vma is already subtracted from the target address,
the condition should simply check that a is within the target page.

Signed-off-by: Petr Tesarik <petr@tesarici.cz>

---
 x86.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/x86.c
+++ b/x86.c
@@ -171,7 +171,7 @@ disas_at(struct dump_desc *dd, struct di
 			int cont = strncmp(insn, "jmp", 3);
 
 			a -= info->buffer_vma;
-			if (a < info->buffer_vma + dd->page_size) {
+			if (a < dd->page_size) {
 				priv->initstate = state;
 				++priv->initstate.depth;
 				if (disas_at(dd, info, a) > 0)