net: tls: fix possible race condition between do_tls_getsockopt_conf() and do_tls_set...

net: tls: fix possible race condition between do_tls_getsockopt_conf() and do_tls_setsockopt_conf()

[ Upstream commit b2ff0e91c737d9bc2ff7658db03555d695bcb3a3 ]

ctx->crypto_send.info is not protected by lock_sock in
do_tls_getsockopt_conf(). A race condition between do_tls_getsockopt_conf()
and error paths of do_tls_setsockopt_conf() may lead to a use-after-free
or null-deref.

More discussion:  https://lore.kernel.org/all/Y/ht6gQL+u6fj3dG@hog/

Fixes: c2c217d10788 ("tls: kernel TLS support")
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Link: https://lore.kernel.org/r/20230228023344.9623-1-hbh25y@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>