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| author | Steven Rostedt (VMware) | 2017-06-29 16:05:45 +0200 |
|---|---|---|
| committer | Steven Rostedt (VMware) | 2017-06-29 16:05:45 +0200 |
| commit | 0f17976568b3f72e676450af0c0db6f8752253d6 (patch) | |
| tree | 6bd68d4113163f5205b7ee89a36b162e92b13d20 /arch/x86/kernel/nmi.c | |
| parent | Linux 4.12-rc5 (diff) | |
| download | kernel-qcow2-linux-0f17976568b3f72e676450af0c0db6f8752253d6.tar.gz kernel-qcow2-linux-0f17976568b3f72e676450af0c0db6f8752253d6.tar.xz kernel-qcow2-linux-0f17976568b3f72e676450af0c0db6f8752253d6.zip | |
ftrace: Fix regression with module command in stack_trace_filter
When doing the following command:
# echo ":mod:kvm_intel" > /sys/kernel/tracing/stack_trace_filter
it triggered a crash.
This happened with the clean up of probes. It required all callers to the
regex function (doing ftrace filtering) to have ops->private be a pointer to
a trace_array. But for the stack tracer, that is not the case.
Allow for the ops->private to be NULL, and change the function command
callbacks to handle the trace_array pointer being NULL as well.
Fixes: d2afd57a4b96 ("tracing/ftrace: Allow instances to have their own function probes")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'arch/x86/kernel/nmi.c')
0 files changed, 0 insertions, 0 deletions