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(parent: f400194) | patch
evm: check hash algorithm passed to init_desc()
authorRoberto Sassu <roberto.sassu@huawei.com>
Wed, 29 May 2019 13:30:33 +0000 (15:30 +0200)
committerMimi Zohar <zohar@linux.ibm.com>
Thu, 30 May 2019 03:18:25 +0000 (23:18 -0400)
commit221be106d75c1b511973301542f47d6000d0b63e
tree18f8246e67943de8fc8f5d9ebe2fcb927b8ed391tree | snapshot
parentf40019475bbbe9b455e7fd4385fcf13896c492cacommit | diff
evm: check hash algorithm passed to init_desc()

This patch prevents memory access beyond the evm_tfm array by checking the
validity of the index (hash algorithm) passed to init_desc(). The hash
algorithm can be arbitrarily set if the security.ima xattr type is not
EVM_XATTR_HMAC.

Fixes: 5feeb61183dde ("evm: Allow non-SHA1 digital signatures")
Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
security/integrity/evm/evm_crypto.c diff | blob | history
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