eCryptfs: NULL crypt_stat dereference during lookup
If ecryptfs_encrypted_view or ecryptfs_xattr_metadata were being specified as mount options, a NULL pointer dereference of crypt_stat was possible during lookup. This patch moves the crypt_stat assignment into ecryptfs_lookup_and_interpose_lower(), ensuring that crypt_stat will not be NULL before we attempt to dereference it. Thanks to Dan Carpenter and his static analysis tool, smatch, for finding this bug. Signed-off-by:Tyler Hicks <tyhicks@linux.vnet.ibm.com> Acked-by:
Dustin Kirkland <kirkland@canonical.com> Cc: Dan Carpenter <error27@gmail.com> Cc: Serge Hallyn <serue@us.ibm.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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