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Date: Tue, 1 Jun 2010 10:23:11 +0200 From: Dan Carpenter <error27@...il.com> To: Chris Mason <chris.mason@...cle.com> Cc: Yan Zheng <zheng.yan@...cle.com>, Josef Bacik <josef@...hat.com>, Al Viro <viro@...iv.linux.org.uk>, linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org Subject: [patch] btrfs: uninitialized data is check_path_shared() refs can be used with uninitialized data if btrfs_lookup_extent_info() fails on the first pass through the loop. In the original code if that happens then check_path_shared() probably returns 1, but with this patch it will continue through the loop. I'm not super familiar with this code so please look it over carefully. Signed-off-by: Dan Carpenter <error27@...il.com> diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index fa6ccc1..9640dae 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -2673,7 +2673,7 @@ static int check_path_shared(struct btrfs_root *root, struct extent_buffer *eb; int level; int ret; - u64 refs; + u64 refs = 0; for (level = 0; level < BTRFS_MAX_LEVEL; level++) { if (!path->nodes[level]) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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