[PATCH 4.14 17/43] kcm: lock lower socket in kcm_attach

4.14-stable review patch. If anyone has any objections, please let me know. -- From: Tom Herbert [ Upstream commit 2cc683e88c0c993ac3721d9b702cb0630abe2879 ] Need to lock lower socket in order to provide mutual exclusion with kcm_unattach. v2: Add

[PATCH 4.14 17/43] kcm: lock lower socket in kcm_attach

4.14-stable review patch. If anyone has any objections, please let me know. -- From: Tom Herbert [ Upstream commit 2cc683e88c0c993ac3721d9b702cb0630abe2879 ] Need to lock lower socket in order to provide mutual exclusion with kcm_unattach. v2: Add Reported-by for syzbot