f2fs: fix a problem of using memory after free
This patch fix a problem of using memory after free
in function __try_merge_extent_node.
Fixes: 0f825ee6e8
("f2fs: add new interfaces for extent tree")
Cc: <stable@vger.kernel.org>
Signed-off-by: Yunlei He <heyunlei@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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@ -352,11 +352,12 @@ static struct extent_node *__try_merge_extent_node(struct inode *inode,
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}
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if (next_ex && __is_front_mergeable(ei, &next_ex->ei)) {
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if (en)
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__release_extent_node(sbi, et, prev_ex);
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next_ex->ei.fofs = ei->fofs;
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next_ex->ei.blk = ei->blk;
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next_ex->ei.len += ei->len;
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if (en)
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__release_extent_node(sbi, et, prev_ex);
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en = next_ex;
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}
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