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softmmu-physmem-Simplify-flatview_write-and-address_.patch 1.95 KB
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yezengruan authored 2022-05-21 14:42 +08:00 . fix CVE-2021-3750 (openeuler !293)
From 105c54fca54e73f17abe244b457872926e43f8a2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@redhat.com>
Date: Wed, 15 Dec 2021 19:24:20 +0100
Subject: [PATCH 2/3] softmmu/physmem: Simplify flatview_write and
address_space_access_valid
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Remove unuseful local 'result' variables.
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20211215182421.418374-3-philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
---
softmmu/physmem.c | 11 +++--------
1 file changed, 3 insertions(+), 8 deletions(-)
diff --git a/softmmu/physmem.c b/softmmu/physmem.c
index 3b9a61448c..049e7b1454 100644
--- a/softmmu/physmem.c
+++ b/softmmu/physmem.c
@@ -2823,14 +2823,11 @@ static MemTxResult flatview_write(FlatView *fv, hwaddr addr, MemTxAttrs attrs,
hwaddr l;
hwaddr addr1;
MemoryRegion *mr;
- MemTxResult result = MEMTX_OK;
l = len;
mr = flatview_translate(fv, addr, &addr1, &l, true, attrs);
- result = flatview_write_continue(fv, addr, attrs, buf, len,
- addr1, l, mr);
-
- return result;
+ return flatview_write_continue(fv, addr, attrs, buf, len,
+ addr1, l, mr);
}
/* Called within RCU critical section. */
@@ -3127,12 +3124,10 @@ bool address_space_access_valid(AddressSpace *as, hwaddr addr,
MemTxAttrs attrs)
{
FlatView *fv;
- bool result;
RCU_READ_LOCK_GUARD();
fv = address_space_to_flatview(as);
- result = flatview_access_valid(fv, addr, len, is_write, attrs);
- return result;
+ return flatview_access_valid(fv, addr, len, is_write, attrs);
}
static hwaddr
--
2.27.0
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