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kmemleak: Check for NULL pointer returned by create_object()

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This patch adds NULL pointer checking in the early_alloc() function.

Reported-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Catalin Marinas 2009-10-09 10:30:34 +01:00 committed by Linus Torvalds
parent c1bcd6b327
commit 0d5d1aadc8
1 changed files with 3 additions and 0 deletions
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3
mm/kmemleak.c
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@ -834,11 +834,14 @@ static void early_alloc(struct early_log *log)
rcu_read_lock(); rcu_read_lock();
object = create_object((unsigned long)log->ptr, log->size, object = create_object((unsigned long)log->ptr, log->size,
log->min_count, GFP_ATOMIC); log->min_count, GFP_ATOMIC);
if (!object)
goto out;
spin_lock_irqsave(&object->lock, flags); spin_lock_irqsave(&object->lock, flags);
for (i = 0; i < log->trace_len; i++) for (i = 0; i < log->trace_len; i++)
object->trace[i] = log->trace[i]; object->trace[i] = log->trace[i];
object->trace_len = log->trace_len; object->trace_len = log->trace_len;
spin_unlock_irqrestore(&object->lock, flags); spin_unlock_irqrestore(&object->lock, flags);
out:
rcu_read_unlock(); rcu_read_unlock();
} }