Commit 93574fcc authored by Dan Carpenter's avatar Dan Carpenter Committed by Steven Rostedt

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 <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent c3b7cdf1
......@@ -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);
}
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment