CVE-2024-26800

In the Linux kernel, the following vulnerability has been resolved: tls:
fix use-after-free on failed backlog decryption When the decrypt request
goes to the backlog and crypto_aead_decrypt returns -EBUSY,
tls_do_decryption will wait until all async decryptions have completed. If
one of them fails, tls_do_decryption will return -EBADMSG and
tls_decrypt_sg jumps to the error path, releasing all the pages. But the
pages have been passed to the async callback, and have already been
released by tls_decrypt_done. The only true async case is when
crypto_aead_decrypt returns -EINPROGRESS. With -EBUSY, we already waited so
we can tell tls_sw_recvmsg that the data is available for immediate copy,
but we need to notify tls_decrypt_sg (via the new ->async_done flag) that
the memory has already been released.

Notes