From: Vitaly Mayatskikh <v.mayatskih@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: Pekka Paalanen <pq@iki.fi>
Subject: [PATCH] ftrace: advance readpos in trace_seq_to_user() by really read bytes
Date: Thu, 26 Mar 2009 18:22:18 +0100 [thread overview]
Message-ID: <87zlf8kxmd.wl%vmayatsk@redhat.com> (raw)
If tracer will not provide input buffer of enough size, he will never
see data between cnt and len bytes.
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 17bb88d..0217615 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -477,7 +477,7 @@ ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf, size_t cnt)
if (ret)
return -EFAULT;
- s->readpos += len;
+ s->readpos += cnt;
return cnt;
}
--
wbr, Vitaly
next reply other threads:[~2009-03-26 17:22 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-26 17:22 Vitaly Mayatskikh [this message]
2009-03-26 18:13 ` Pekka Paalanen
2009-03-26 18:55 ` Vitaly Mayatskikh
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