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Message-Id: <1363783698-28092-2-git-send-email-dmonakhov@openvz.org> Date: Wed, 20 Mar 2013 16:48:18 +0400 From: Dmitry Monakhov <dmonakhov@...nvz.org> To: linux-ext4@...r.kernel.org Cc: linux-fsdevel@...r.kernel.org, viro@...IV.linux.org.uk, jack@...e.cz, Dmitry Monakhov <dmonakhov@...nvz.org> Subject: [PATCH 2/2] fs: prevent null pointer dereference for fs-less devices Signed-off-by: Dmitry Monakhov <dmonakhov@...nvz.org> --- fs/block_dev.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/fs/block_dev.c b/fs/block_dev.c index 172f849..e13d1df 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -228,7 +228,8 @@ struct super_block *freeze_bdev(struct block_device *bdev) * thaw_bdev drops it. */ sb = get_super(bdev); - drop_super(sb); + if (sb) + drop_super(sb); mutex_unlock(&bdev->bd_fsfreeze_mutex); return sb; } -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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