Commit 9b83c771 authored by Dan Carpenter's avatar Dan Carpenter Committed by Konrad Rzeszutek Wilk

xen/blkback: potential null dereference in error handling

blkbk->pending_pages can be NULL here so I added a check for it.
Signed-off-by: default avatarDan Carpenter <error27@gmail.com>
[v1: Redid the loop a bit]
Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
parent 6464920a
...@@ -809,11 +809,13 @@ static int __init xen_blkif_init(void) ...@@ -809,11 +809,13 @@ static int __init xen_blkif_init(void)
failed_init: failed_init:
kfree(blkbk->pending_reqs); kfree(blkbk->pending_reqs);
kfree(blkbk->pending_grant_handles); kfree(blkbk->pending_grant_handles);
if (blkbk->pending_pages) {
for (i = 0; i < mmap_pages; i++) { for (i = 0; i < mmap_pages; i++) {
if (blkbk->pending_pages[i]) if (blkbk->pending_pages[i])
__free_page(blkbk->pending_pages[i]); __free_page(blkbk->pending_pages[i]);
} }
kfree(blkbk->pending_pages); kfree(blkbk->pending_pages);
}
kfree(blkbk); kfree(blkbk);
blkbk = NULL; blkbk = NULL;
return rc; return rc;
......
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