linux-kernel - [PATCH] UDF: check for allocated memory for data of new inodes

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Message-ID: <20070511183247.GA8431@cvg>
Date:	Fri, 11 May 2007 22:32:47 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Ben Fennema <bfennema@...con.csc.calpoly.edu>,
	Christoph Hellwig <hch@...radead.org>, Jan Kara <jack@....cz>
Subject: [PATCH] UDF: check for allocated memory for data of new inodes

This patch adds checking for granted memory for inode data
at the moment of it's creation.

Signed-off-by: Cyrill Gorcunov <gorcunov@...il.com>

---

Christoph, I remember your notice about UDF_I_*
macroses... and I'm working on it now ;)

 fs/udf/ialloc.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/fs/udf/ialloc.c b/fs/udf/ialloc.c
index 8206983..efb46a4 100644
--- a/fs/udf/ialloc.c
+++ b/fs/udf/ialloc.c
@@ -50,7 +50,7 @@ void udf_free_inode(struct inode * inode)
 		else
 			UDF_SB_LVIDIU(sb)->numFiles =
 				cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) - 1);
-		
+
 		mark_buffer_dirty(sbi->s_lvidbh);
 	}
 	mutex_unlock(&sbi->s_alloc_mutex);
@@ -136,6 +136,12 @@ struct inode * udf_new_inode (struct inode *dir, int mode, int * err)
 		UDF_I_EFE(inode) = 0;
 		UDF_I_DATA(inode) = kzalloc(inode->i_sb->s_blocksize - sizeof(struct fileEntry), GFP_KERNEL);
 	}
+	if (!UDF_I_DATA(inode))
+	{
+		iput(inode);
+		*err = -ENOMEM;
+		return NULL;
+	}
 	if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB))
 		UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB;
 	else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
-
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