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commita4833e3abaupstream. The rpcgss_context trace event acceptor field is a dynamically sized string that records the "data" parameter. But this parameter is also dependent on the "len" field to determine the size of the data. It needs to use __string_len() helper macro where the length can be passed in. It also incorrectly uses strncpy() to save it instead of __assign_str(). As these macros can change, it is not wise to open code them in trace events. As of commitc759e60903("tracing: Remove __assign_str_len()"), __assign_str() can be used for both __string() and __string_len() fields. Before that commit, __assign_str_len() is required to be used. This needs to be noted for backporting. (In actuality, commitc1fa617cae("tracing: Rework __assign_str() and __string() to not duplicate getting the string") is the commit that makes __string_str_len() obsolete). Cc: stable@vger.kernel.org Fixes:0c77668ddb("SUNRPC: Introduce trace points in rpc_auth_gss.ko") Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>