linux-kernel - [PATCH 2.6.20-rc2] [BUGFIX] drivers/atm/firestream.c: Fix infinite recursion when alignment passed is 0.

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Date:	Sat, 30 Dec 2006 18:26:03 -0800
From:	Amit Choudhary <amit2030@...il.com>
To:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH 2.6.20-rc2] [BUGFIX] drivers/atm/firestream.c: Fix infinite
 recursion when alignment passed is 0.

Description: Fix infinite recursion when alignment passed is 0 in function aligned_kmalloc(), in file drivers/atm/firestream.c. Also, a negative value for alignment does not make sense. Check for negative value too.
The function prototype is:
		static void __devinit *aligned_kmalloc (int size, gfp_t flags, int alignment).


Signed-off-by: Amit Choudhary <amit2030@...il.com>

diff --git a/drivers/atm/firestream.c b/drivers/atm/firestream.c
index 9c67df5..2ba6b2e 100644
--- a/drivers/atm/firestream.c
+++ b/drivers/atm/firestream.c
@@ -1385,7 +1385,7 @@ static void __devinit *aligned_kmalloc (
 
 	if (alignment <= 0x10) {
 		t = kmalloc (size, flags);
-		if ((unsigned long)t & (alignment-1)) {
+		if ((unsigned long)t & ((alignment <= 0) ? 0 : (alignment-1))) {
 			printk ("Kmalloc doesn't align things correctly! %p\n", t);
 			kfree (t);
 			return aligned_kmalloc (size, flags, alignment * 4);
-
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