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platform_kernel-5.15
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rcu: trace fix possible mem-leak 

In the initialization of the RCU trace module, if
rcupreempt_debugfs_init() fails, we never free the the trace buffer.

This patch frees the trace buffer in case the debugfs fails.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Reviewed-by: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Steven Rostedt 2008-07-30 14:20:55 -04:00 committed by Ingo Molnar
parent dd0078f4f0
commit 5802294f1b
1 changed files with 6 additions and 1 deletions
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7
kernel/rcupreempt_trace.c
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@ -308,11 +308,16 @@ static int rcupreempt_debugfs_init(void)
static int __init rcupreempt_trace_init(void) static int __init rcupreempt_trace_init(void)
{ {
int ret;
mutex_init(&rcupreempt_trace_mutex); mutex_init(&rcupreempt_trace_mutex);
rcupreempt_trace_buf = kmalloc(RCUPREEMPT_TRACE_BUF_SIZE, GFP_KERNEL); rcupreempt_trace_buf = kmalloc(RCUPREEMPT_TRACE_BUF_SIZE, GFP_KERNEL);
if (!rcupreempt_trace_buf) if (!rcupreempt_trace_buf)
return 1; return 1;
return rcupreempt_debugfs_init(); ret = rcupreempt_debugfs_init();
if (ret)
kfree(rcupreempt_trace_buf);
return ret;
} }
static void __exit rcupreempt_trace_cleanup(void) static void __exit rcupreempt_trace_cleanup(void)