提交 a1ee5a45 编写于 作者: L Li Zefan

Btrfs: avoid possible NULL deref in io_ctl_drop_pages()

If we run into some failure path in io_ctl_prepare_pages(),
io_ctl->pages[] array may have some NULL pointers.
Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
上级 db804f23
......@@ -319,10 +319,12 @@ static void io_ctl_drop_pages(struct io_ctl *io_ctl)
io_ctl_unmap_page(io_ctl);
for (i = 0; i < io_ctl->num_pages; i++) {
if (io_ctl->pages[i]) {
ClearPageChecked(io_ctl->pages[i]);
unlock_page(io_ctl->pages[i]);
page_cache_release(io_ctl->pages[i]);
}
}
}
static int io_ctl_prepare_pages(struct io_ctl *io_ctl, struct inode *inode,
......
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