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authorEric Biggers <ebiggers@google.com>2017-06-08 14:48:18 +0100
committerJames Morris <james.l.morris@oracle.com>2017-06-09 13:29:46 +1000
commit794b4bc292f5d31739d89c0202c54e7dc9bc3add (patch)
tree717c0817eea7ddb40659b40f45f7524eedddc901 /samples/mic
parente9ff56ac352446f55141aaef1553cee662b2e310 (diff)
KEYS: encrypted: fix buffer overread in valid_master_desc()
With the 'encrypted' key type it was possible for userspace to provide a data blob ending with a master key description shorter than expected, e.g. 'keyctl add encrypted desc "new x" @s'. When validating such a master key description, validate_master_desc() could read beyond the end of the buffer. Fix this by using strncmp() instead of memcmp(). [Also clean up the code to deduplicate some logic.] Cc: Mimi Zohar <zohar@linux.vnet.ibm.com> Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: James Morris <james.l.morris@oracle.com>
Diffstat (limited to 'samples/mic')
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