From dfcb33773877f31a40ba0583e622935ef105c90b Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Fri, 23 Oct 2020 10:41:07 -0400 Subject: SUNRPC: Fix general protection fault in trace_rpc_xdr_overflow() [ Upstream commit d321ff589c16d8c2207485a6d7fbdb14e873d46e ] The TP_fast_assign() section is careful enough not to dereference xdr->rqst if it's NULL. The TP_STRUCT__entry section is not. Fixes: 5582863f450c ("SUNRPC: Add XDR overflow trace event") Signed-off-by: Chuck Lever Signed-off-by: J. Bruce Fields Signed-off-by: Sasha Levin --- include/trace/events/sunrpc.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'include/trace') diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h index 28df77a948e5..f16e9fb97e9f 100644 --- a/include/trace/events/sunrpc.h +++ b/include/trace/events/sunrpc.h @@ -357,10 +357,10 @@ TRACE_EVENT(rpc_xdr_overflow, __field(size_t, tail_len) __field(unsigned int, page_len) __field(unsigned int, len) - __string(progname, - xdr->rqst->rq_task->tk_client->cl_program->name) - __string(procedure, - xdr->rqst->rq_task->tk_msg.rpc_proc->p_name) + __string(progname, xdr->rqst ? + xdr->rqst->rq_task->tk_client->cl_program->name : "unknown") + __string(procedure, xdr->rqst ? + xdr->rqst->rq_task->tk_msg.rpc_proc->p_name : "unknown") ), TP_fast_assign( -- cgit v1.2.3