stable inclusion
from stable-5.10.50
commit 36ae903607f6aadfd73e0f345e6f6abf8d1bde23
bugzilla: 174522 https://gitee.com/openeuler/kernel/issues/I4DNFY

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=36ae903607f6aadfd73e0f345e6f6abf8d1bde23

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

commit 85b18d7b upstream.

Turns out that the bit 61 in the TEID is not always 1 and if that's
the case the address space ID and the address are
unpredictable. Without an address and its address space ID we can't
export memory and hence we can only send a SIGSEGV to the process or
panic the kernel depending on who caused the exception.

Unfortunately bit 61 is only reliable if we have the "misc" UV feature
bit.
Signed-off-by: NJanosch Frank <frankja@linux.ibm.com>
Reviewed-by: NChristian Borntraeger <borntraeger@de.ibm.com>
Fixes: 084ea4d6 ("s390/mm: add (non)secure page access exceptions handlers")
Cc: stable@vger.kernel.org
Signed-off-by: NVasily Gorbik <gor@linux.ibm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Acked-by: NWeilong Chen <chenweilong@huawei.com>
Signed-off-by: NChen Jun <chenjun102@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>