Module: xenomai-3 Branch: master Commit: 52f947bbb055e08232b7e1a116bd7f2c80bfed57 URL: http://git.xenomai.org/?p=xenomai-3.git;a=commit;h=52f947bbb055e08232b7e1a116bd7f2c80bfed57
Author: Jan Kiszka <jan.kis...@siemens.com> Date: Thu Dec 11 13:57:45 2014 +0100 cobalt/rtdm: Fix tracing of failed fd operation Also if some fd operation failed, we trace the result via the fd_request_status class. However, fd will then contain an error code, not a valid pointer. Avoid dereferencing such invalid pointers and causing an oops this way. Signed-off-by: Jan Kiszka <jan.kis...@siemens.com> --- kernel/cobalt/trace/cobalt-rtdm.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/cobalt/trace/cobalt-rtdm.h b/kernel/cobalt/trace/cobalt-rtdm.h index 953e89f..e687f0c 100644 --- a/kernel/cobalt/trace/cobalt-rtdm.h +++ b/kernel/cobalt/trace/cobalt-rtdm.h @@ -75,7 +75,8 @@ DECLARE_EVENT_CLASS(fd_request_status, TP_fast_assign( memcpy(__entry->comm, task->comm, TASK_COMM_LEN); __entry->pid = task->pid; - __entry->dev = rtdm_fd_to_context(fd)->device; + __entry->dev = + !IS_ERR(fd) ? rtdm_fd_to_context(fd)->device : NULL; __entry->ufd = ufd; ), _______________________________________________ Xenomai-git mailing list Xenomai-git@xenomai.org http://www.xenomai.org/mailman/listinfo/xenomai-git