xen-blkback: fix leak on grant map error path
Fix leaking a page when a grant mapping has failed. CC: stable@vger.kernel.org Signed-off-by: Roger Pau Monné <roger.pau@citrix.com> Reported-and-Tested-by: Tao Chen <boby.chen@huawei.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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@ -763,6 +763,7 @@ again:
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BUG_ON(new_map_idx >= segs_to_map);
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if (unlikely(map[new_map_idx].status != 0)) {
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pr_debug(DRV_PFX "invalid buffer -- could not remap it\n");
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put_free_pages(blkif, &pages[seg_idx]->page, 1);
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pages[seg_idx]->handle = BLKBACK_INVALID_HANDLE;
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ret |= 1;
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goto next;
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