Subject: [merged] mm-nommuc-add-additional-check-for-vread-just-like-vwrite-has-done.patch removed from -mm tree
To: gang.chen@xxxxxxxxxxx,riel@xxxxxxxxxx,viro@xxxxxxxxxxxxxxxxxx,walken@xxxxxxxxxx,mm-commits@xxxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Mon, 08 Jul 2013 12:25:46 -0700
The patch titled
Subject: mm/nommu.c: add additional check for vread() just like vwrite() has done
has been removed from the -mm tree. Its filename was
mm-nommuc-add-additional-check-for-vread-just-like-vwrite-has-done.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Chen Gang <gang.chen@xxxxxxxxxxx>
Subject: mm/nommu.c: add additional check for vread() just like vwrite() has done
vwrite() checks for overflow. vread() should do the same thing.
Since vwrite() checks the source buffer address, vread() should check
the destination buffer address.
Signed-off-by: Chen Gang <gang.chen@xxxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Michel Lespinasse <walken@xxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/nommu.c | 4 ++++
1 file changed, 4 insertions(+)
diff -puN mm/nommu.c~mm-nommuc-add-additional-check-for-vread-just-like-vwrite-has-done mm/nommu.c
--- a/mm/nommu.c~mm-nommuc-add-additional-check-for-vread-just-like-vwrite-has-done
+++ a/mm/nommu.c
@@ -282,6 +282,10 @@ EXPORT_SYMBOL(vmalloc_to_pfn);
long vread(char *buf, char *addr, unsigned long count)
{
+ /* Don't allow overflow */
+ if ((unsigned long) buf + count < count)
+ count = -(unsigned long) buf;
+
memcpy(buf, addr, count);
return count;
}
_
Patches currently in -mm which might be from gang.chen@xxxxxxxxxxx are
origin.patch
linux-next.patch
kernel-auditfilterc-fix-leak-in-audit_add_rule-error-path.patch
include-linux-interrupth-add-dummy-irq_set_irq_wake-for-generic_hardirqs.patch
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