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| author | Steven Rostedt <srostedt@redhat.com> | 2013-01-09 20:54:17 -0500 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2013-01-09 20:54:17 -0500 |
| commit | a8dd2176a8e988e3744e863ac39647a6f59fa900 (patch) | |
| tree | 2f848f44ae3a614d9b7d13e156e5bc7429c40113 /kernel/trace/trace.c | |
| parent | d1c3ed669a2d452cacfb48c2d171a1f364dae2ed (diff) | |
| download | linux-a8dd2176a8e988e3744e863ac39647a6f59fa900.tar.gz linux-a8dd2176a8e988e3744e863ac39647a6f59fa900.tar.bz2 linux-a8dd2176a8e988e3744e863ac39647a6f59fa900.zip | |
tracing: Fix regression of trace_options file setting
The latest change to allow trace options to be set on the command
line also broke the trace_options file.
The zeroing of the last byte of the option name that is echoed into
the trace_option file was removed with the consolidation of some
of the code. The compare between the option and what was written to
the trace_options file fails because the string holding the data
written doesn't terminate with a null character.
A zero needs to be added to the end of the string copied from
user space.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace.c')
| -rw-r--r-- | kernel/trace/trace.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index e5125677efa0..1bbfa0446507 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -2899,6 +2899,8 @@ tracing_trace_options_write(struct file *filp, const char __user *ubuf, if (copy_from_user(&buf, ubuf, cnt)) return -EFAULT; + buf[cnt] = 0; + trace_set_options(buf); *ppos += cnt; |