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irda: validate peer name and attribute lengths

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commit d370af0ef7 upstream.

Length fields provided by a peer for names and attributes may be longer
than the destination array sizes.  Validate lengths to prevent stack
buffer overflows.

Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Dan Rosenberg
2011-03-20 15:32:06 +00:00
committed by Greg Kroah-Hartman
parent e22b468f54
commit 396c7c0bf6
1 changed files with 6 additions and 0 deletions
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6
net/irda/iriap.c
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@@ -655,10 +655,16 @@ static void iriap_getvaluebyclass_indication(struct iriap_cb *self,
n = 1;
name_len = fp[n++];
IRDA_ASSERT(name_len < IAS_MAX_CLASSNAME + 1, return;);
memcpy(name, fp+n, name_len); n+=name_len;
name[name_len] = '\0';
attr_len = fp[n++];
IRDA_ASSERT(attr_len < IAS_MAX_ATTRIBNAME + 1, return;);
memcpy(attr, fp+n, attr_len); n+=attr_len;
attr[attr_len] = '\0';