linux-kernel - [PATCH] binfmt_elf: plug a memory leak situation on dump

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Date:	Fri, 26 Feb 2010 00:54:40 -0300
From:	André Goddard Rosa <andre.goddard@...il.com>
To:	Alexander Viro <viro@...iv.linux.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Roland McGrath <roland@...hat.com>,
	WANG Cong <amwang@...hat.com>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	André Goddard Rosa <andre.goddard@...il.com>
Subject: [PATCH] binfmt_elf: plug a memory leak situation on dump_seek()

Signed-off-by: André Goddard Rosa <andre.goddard@...il.com>
---
 fs/binfmt_elf.c |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index fd5b2ea..13b0845 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -1096,6 +1096,8 @@ static int dump_write(struct file *file, const void *addr, int nr)
 
 static int dump_seek(struct file *file, loff_t off)
 {
+	int ret = 1;
+
 	if (file->f_op->llseek && file->f_op->llseek != no_llseek) {
 		if (file->f_op->llseek(file, off, SEEK_CUR) < 0)
 			return 0;
@@ -1107,13 +1109,15 @@ static int dump_seek(struct file *file, loff_t off)
 			unsigned long n = off;
 			if (n > PAGE_SIZE)
 				n = PAGE_SIZE;
-			if (!dump_write(file, buf, n))
-				return 0;
+			if (!dump_write(file, buf, n)) {
+				ret = 0;
+				break;
+			}
 			off -= n;
 		}
 		free_page((unsigned long)buf);
 	}
-	return 1;
+	return ret;
 }
 
 /*
-- 
1.7.0.94.gf7311

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