From: Dmitriy Monakhov <dmonakhov@openvz.org>
To: bfennema@falcon.csc.calpoly.edu
Cc: linux-kernel@vger.kernel.org
Subject: [patch] udf: possible null pointer dereference while load_partition
Date: Sun, 04 Mar 2007 11:30:34 +0300 [thread overview]
Message-ID: <87abytl8b9.fsf@sw.ru> (raw)
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sb_read may return NULL, let's explicitly check it.
Signed-off-by: Dmitriy Monakhov <dmonakhov@openvz.org>
[-- Attachment #2: diff-mm-udf-load_partition-sb_read-errh-fix --]
[-- Type: text/plain, Size: 521 bytes --]
diff --git a/fs/udf/super.c b/fs/udf/super.c
index f4b3265..951b85d 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1407,6 +1407,8 @@ udf_load_partition(struct super_block *sb, kernel_lb_addr *fileset)
pos = udf_block_map(UDF_SB_VAT(sb), 0);
bh = sb_bread(sb, pos);
+ if (!bh)
+ return 1;
UDF_SB_TYPEVIRT(sb,i).s_start_offset =
le16_to_cpu(((struct virtualAllocationTable20 *)bh->b_data + udf_ext0_offset(UDF_SB_VAT(sb)))->lengthHeader) +
udf_ext0_offset(UDF_SB_VAT(sb));
reply other threads:[~2007-03-04 8:30 UTC|newest]
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