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tracing/probe: Fix same probe event argument matching

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Commit fe60b0ce8e ("tracing/probe: Reject exactly same probe event")
tries to reject a event which matches an already existing probe.

However it currently continues to match arguments and rejects adding a
probe even when the arguments don't match. Fix this by only rejecting a
probe if and only if all the arguments match.

Link: http://lkml.kernel.org/r/20190924114906.14038-1-srikar@linux.vnet.ibm.com

Fixes: fe60b0ce8e ("tracing/probe: Reject exactly same probe event")
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Srikar Dronamraju 2019-09-24 17:19:06 +05:30 committed by Steven Rostedt (VMware)
parent b78b94b821
commit f8d7ab2bde
2 changed files with 6 additions and 4 deletions
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5
kernel/trace/trace_kprobe.c
View File

@ -549,10 +549,11 @@ static bool trace_kprobe_has_same_kprobe(struct trace_kprobe *orig,
for (i = 0; i < orig->tp.nr_args; i++) {
if (strcmp(orig->tp.args[i].comm,
comp->tp.args[i].comm))
continue;
break;
}
return true;
if (i == orig->tp.nr_args)
return true;
}
return false;

5
kernel/trace/trace_uprobe.c
View File

@ -431,10 +431,11 @@ static bool trace_uprobe_has_same_uprobe(struct trace_uprobe *orig,
for (i = 0; i < orig->tp.nr_args; i++) {
if (strcmp(orig->tp.args[i].comm,
comp->tp.args[i].comm))
continue;
break;
}
return true;
if (i == orig->tp.nr_args)
return true;
}
return false;