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A static bug finder (EBA) on Linux 4.7:
Double lock in net/ceph/auth.c
second lock at 108: mutex_lock(& ac->mutex); [ceph_auth_build_hello]
after calling from 263: ret = ceph_auth_build_hello(ac, msg_buf, msg_len);
if ! ac->protocol -> true at 262
first lock at 261: mutex_lock(& ac->mutex); [ceph_build_auth]
ceph_auth_build_hello() is never called, because the protocol is always
initialized, whether we are checking existing tickets (in delayed_work())
or getting new ones after invalidation (in invalidate_authorizer()).
Reported-by: Iago Abal <iari@itu.dk>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
464691bd52