Messages in this thread | | | Subject | Re: [PATCH 1/4] ftrace: Fix MATCH_END_ONLY filter matching | From | Steven Rostedt <> | Date | Fri, 11 Dec 2009 10:10:31 -0500 |
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On Fri, 2009-12-11 at 13:27 +0100, Frederic Weisbecker wrote: > On Fri, Dec 11, 2009 at 01:20:04PM +0100, Frederic Riss wrote: > > 2009/12/11 Li Zefan <lizf@cn.fujitsu.com>: > > > For '*foo' pattern, we should allow any string ending with > > > 'foo', but ftrace filter incorrectly disallows strings > > > like bar_foo_foo: > > [...] > > > case MATCH_END_ONLY: > > > - ptr = strstr(str, regex); > > > - if (ptr && (ptr[len] == 0)) > > > + slen = strlen(str); > > > + if (slen >= len && memcpy(str + slen - len, regex, len)) > > > matched = 1; > > > > Shouldn't that be memcmp() == 0? I don't see how memcpy might serve as > > a compare operator. > > > > Fred. > > > Oh you're right, I reviewed it too quickly. Perhaps the star's > alignment made it possible for only one Frederic to review it > the right way... >
The stars are still fuzzy to me. How does memcpy work here?
-- Steve
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