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Merge tag 'trace-v4.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

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Pull tracing fixes from Steven Rostedt:
 "This adds three fixes for the tracing code.

  The first is a bug when ftrace_dump_on_oops is triggered in atomic
  context and function graph tracer is the tracer that is being
  reported.

  The second fix is bad parsing of the trace_events from the kernel
  command line, where it would ignore specific events if the system name
  is used with defining the event(it enables all events within the
  system).

  The last one is a fix to the TRACE_DEFINE_ENUM(), where a check was
  missing to see if the ptr was incremented to the end of the string,
  but the loop increments it again and can miss the nul delimiter to
  stop processing"

* tag 'trace-v4.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Fix possible out of bounds memory access when parsing enums
  tracing: Fix incorrect enabling of trace events by boot cmdline
  tracing: Handle ftrace_dump() atomic context in graph_trace_open()
This commit is contained in:
Linus Torvalds
2015-04-22 11:27:36 -07:00
parent 9b60afee50 3193899d4d
commit 4f2112351b
2 changed files with 20 additions and 3 deletions
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8
kernel/trace/trace_functions_graph.c
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@@ -1308,15 +1308,19 @@ void graph_trace_open(struct trace_iterator *iter)
{
/* pid and depth on the last trace processed */
struct fgraph_data *data;
gfp_t gfpflags;
int cpu;
iter->private = NULL;
data = kzalloc(sizeof(*data), GFP_KERNEL);
/* We can be called in atomic context via ftrace_dump() */
gfpflags = (in_atomic() || irqs_disabled()) ? GFP_ATOMIC : GFP_KERNEL;
data = kzalloc(sizeof(*data), gfpflags);
if (!data)
goto out_err;
data->cpu_data = alloc_percpu(struct fgraph_cpu_data);
data->cpu_data = alloc_percpu_gfp(struct fgraph_cpu_data, gfpflags);
if (!data->cpu_data)
goto out_err_free;