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Btrfs: avoid possible NULL deref in io_ctl_drop_pages()
authorLi Zefan <lizf@cn.fujitsu.com>
Mon, 9 Jan 2012 06:27:42 +0000 (14:27 +0800)
committerLi Zefan <lizf@cn.fujitsu.com>
Wed, 11 Jan 2012 02:26:34 +0000 (10:26 +0800)
If we run into some failure path in io_ctl_prepare_pages(),
io_ctl->pages[] array may have some NULL pointers.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>

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