tree 7eeeca2fa55e9ef45c381b01d9e3ec1b726297c1
parent efedf51c866130945b5db755cb58670e60205d83
author Chris Wright <chrisw@sous-sol.org> 1212596193 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1212701094 -0700

asn1: additional sanity checking during BER decoding

- Don't trust a length which is greater than the working buffer.
  An invalid length could cause overflow when calculating buffer size
  for decoding oid.

- An oid length of zero is invalid and allows for an off-by-one error when
  decoding oid because the first subid actually encodes first 2 subids.

- A primitive encoding may not have an indefinite length.

Thanks to Wei Wang from McAfee for report.

Cc: Steven French <sfrench@us.ibm.com>
Cc: stable@kernel.org
Acked-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>