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authorDan Carpenter <dan.carpenter@oracle.com>2012-07-11 09:35:08 +0300
committerSteven Rostedt <rostedt@goodmis.org>2012-07-11 19:56:26 -0400
commit93574fcc5b50cc7b8834698acb2ce947e5b6a5dc (patch)
treef40191d94dfc121737e1acb3463874f8dc702ba7 /kernel/trace
parentc3b7cdf180090d2686239a75bb0ae408108ed749 (diff)
downloadop-kernel-dev-93574fcc5b50cc7b8834698acb2ce947e5b6a5dc.zip
op-kernel-dev-93574fcc5b50cc7b8834698acb2ce947e5b6a5dc.tar.gz
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: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace')
-rw-r--r--kernel/trace/trace.c4
1 files changed, 4 insertions, 0 deletions
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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