Eric Biggers d60b5b7854 fscrypt: fix dereference of NULL user_key_payload ... When an fscrypt-encrypted file is opened, we request the file's master key from the keyrings service as a logon key, then access its payload. However, a revoked key has a NULL payload, and we failed to check for this. request_key() *does* skip revoked keys, but there is still a window where the key can be revoked before we acquire its semaphore. Fix it by checking for a NULL payload, treating it like a key which was already revoked at the time it was requested. Fixes: 88bd6ccdcd ("ext4 crypto: add encryption key management facilities") Reviewed-by: James Morris <james.l.morris@oracle.com> Cc: <stable@vger.kernel.org> [v4.1+] Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: David Howells <dhowells@redhat.com>		2017-10-12 17:16:40 +01:00
..
bio.c	block: replace bi_bdev with a gendisk pointer and partitions index	2017-08-23 12:49:55 -06:00
crypto.c	fscrypt: add support for AES-128-CBC	2017-06-23 20:05:07 -04:00
fname.c	fscrypt: inline fscrypt_free_filename()	2017-06-23 19:59:08 -04:00
fscrypt_private.h	fscrypt: add support for AES-128-CBC	2017-06-23 20:05:07 -04:00
Kconfig	fscrypt: add support for AES-128-CBC	2017-06-23 20:05:07 -04:00
keyinfo.c	fscrypt: fix dereference of NULL user_key_payload	2017-10-12 17:16:40 +01:00
Makefile	fscrypt: factor out bio specific functions	2017-01-01 16:18:49 -05:00
policy.c	The first major feature for ext4 this merge window is the largedir	2017-07-09 09:31:22 -07:00