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

mainline inclusion
from mainline-v6.3-rc2
commit 49c47cc2
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I6NIUR
CVE: CVE-2023-28466

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=49c47cc21b5b7a3d8deb18fc57b0aa2ab1286962

---------------------------

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: 3c4d7559 ("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: Liu Jian <liujian56@huawei.com>

Conflicts:
	net/tls/tls_main.c
Reviewed-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Wang Weiyang <wangweiyang2@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>