fscrypt: Add safety checks to non-block-based en/decryption

fscrypt_encrypt_pagecache_blocks(), fscrypt_encrypt_block_inplace(),
fscrypt_decrypt_block_inplace() would dereference a NULL
fscrypt_inode_info pointer if they were to be called on a file that
hasn't been opened yet or on a block-based filesystem.  Since they have
the ability to report errors anyway, add WARN_ON_ONCE checks for this.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20260713023708.9245-18-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>

0 files changed, 0 insertions, 0 deletions