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SUNRPC: Fix oops in the rpc_xdr_buf event class

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Backchannel rpc tasks don't have task->tk_client set, so it's necessary
to check it for NULL before dereferencing.

Fixes: c509f15a58 ("SUNRPC: Split the xdr_buf event class")
Signed-off-by: Scott Mayhew <smayhew@redhat.com>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Scott Mayhew 2020-11-12 15:17:32 -05:00 committed by J. Bruce Fields
parent ae2975046d
commit c3213d260a
1 changed files with 2 additions and 1 deletions
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3
include/trace/events/sunrpc.h
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@ -68,7 +68,8 @@ DECLARE_EVENT_CLASS(rpc_xdr_buf_class,
TP_fast_assign(
__entry->task_id = task->tk_pid;
__entry->client_id = task->tk_client->cl_clid;
__entry->client_id = task->tk_client ?
task->tk_client->cl_clid : -1;
__entry->head_base = xdr->head[0].iov_base;
__entry->head_len = xdr->head[0].iov_len;
__entry->tail_base = xdr->tail[0].iov_base;