Ingo,
Dan found a bug that is in the queue for 3.6. Please add this for the
3.6 queue.
Thanks,
Steve
Please pull the latest tip/perf/core tree, which can be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git
tip/perf/core
Head SHA1: 93574fcc5b50cc7b8834698acb2ce947e5b6a5dc
Dan Carpenter (1):
tracing: Check for allocation failure in __tracing_open()
----
kernel/trace/trace.c | 4 ++++
1 file changed, 4 insertions(+)
---------------------------
commit 93574fcc5b50cc7b8834698acb2ce947e5b6a5dc
Author: Dan Carpenter <dan.carpen...@oracle.com>
Date: Wed Jul 11 09:35:08 2012 +0300
tracing: Check for allocation failure in __tracing_open()
Clean up and return -ENOMEM on if the kzalloc() fails.
This also prevents a potential crash, as the pointer that failed to
allocate would be later used.
Link: http://lkml.kernel.org/r/20120711063507.GF11812@elgon.mountain
Cc: Frederic Weisbecker <fweis...@gmail.com>
Cc: Ingo Molnar <mi...@redhat.com>
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
Signed-off-by: Steven Rostedt <rost...@goodmis.org>
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 814ff30..a120f98 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2390,6 +2390,9 @@ __tracing_open(struct inode *inode, struct file *file)
iter->buffer_iter = kzalloc(sizeof(*iter->buffer_iter) *
num_possible_cpus(),
GFP_KERNEL);
+ if (!iter->buffer_iter)
+ goto release;
+
/*
* We make a copy of the current tracer to avoid concurrent
* changes on it while we are reading.
@@ -2451,6 +2454,7 @@ __tracing_open(struct inode *inode, struct file *file)
mutex_unlock(&trace_types_lock);
kfree(iter->trace);
kfree(iter->buffer_iter);
+release:
seq_release_private(inode, file);
return ERR_PTR(-ENOMEM);
}
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