linux-kernel - [Patch] net: fix incorrect counting in __scm

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Message-Id: <20091104100717.4785.57149.sendpatchset@localhost.localdomain>
Date:	Wed, 4 Nov 2009 05:04:26 -0500
From:	Amerigo Wang <amwang@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	netdev@...r.kernel.org, Amerigo Wang <amwang@...hat.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: [Patch] net: fix incorrect counting in __scm_destroy()


It seems that in __scm_destroy() we forgot to decrease
the ->count after fput(->fp[i]), this may cause some
problem when we recursively call fput() again.

Signed-off-by: WANG Cong <amwang@...hat.com>
Cc: David S. Miller <davem@...emloft.net>

---
diff --git a/net/core/scm.c b/net/core/scm.c
index b7ba91b..fa53219 100644
--- a/net/core/scm.c
+++ b/net/core/scm.c
@@ -120,8 +120,10 @@ void __scm_destroy(struct scm_cookie *scm)
 				fpl = list_first_entry(&work_list, struct scm_fp_list, list);
 
 				list_del(&fpl->list);
-				for (i=fpl->count-1; i>=0; i--)
+				for (i = fpl->count-1; i >= 0; i--) {
 					fput(fpl->fp[i]);
+					fpl->count--;
+				}
 				kfree(fpl);
 			}
 
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