Description: nfc: fix NULL ptr dereference in llcp_sock_getname() after failed connect
References:
 https://www.openwall.com/lists/oss-security/2021/06/01/1
 https://www.openwall.com/lists/oss-security/2021/08/17/1
 https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=4ac06a1e013cf5fdd963317ffd3b968560f33bba
Notes:
Bugs:
upstream: released (5.13-rc5) [4ac06a1e013cf5fdd963317ffd3b968560f33bba]
5.10-upstream-stable: released (5.10.43) [48ee0db61c8299022ec88c79ad137f290196cac2]
4.19-upstream-stable: released (4.19.194) [93e4ac2a9979a9a4ecc158409ed9c3044dc0ae1f]
4.9-upstream-stable: released (4.9.272) [39c15bd2e5d11bcf7f4c3dba2aad9e1e110a5d94]
sid: released (5.10.46-1)
5.10-bullseye-security: N/A "Fixed before branching point"
4.19-buster-security: released (4.19.194-1)
4.9-stretch-security: released (4.9.272-1)