[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen master] vpci/msix: remove from table list on detach
commit c14aea137eab29eb9c30bfad745a00c65ad21066 Author: Roger Pau Monné <roger.pau@xxxxxxxxxx> AuthorDate: Wed Oct 26 14:56:58 2022 +0200 Commit: Jan Beulich <jbeulich@xxxxxxxx> CommitDate: Wed Oct 26 14:56:58 2022 +0200 vpci/msix: remove from table list on detach Teardown of MSIX vPCI related data doesn't currently remove the MSIX device data from the list of MSIX tables handled by the domain, leading to a use-after-free of the data in the msix structure. Remove the structure from the list before freeing in order to solve it. Reported-by: Jan Beulich <jbeulich@xxxxxxxx> Fixes: d6281be9d0 ('vpci/msix: add MSI-X handlers') Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx> Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx> Release-acked-by: Henry Wang <Henry.Wang@xxxxxxx> --- xen/drivers/vpci/vpci.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/xen/drivers/vpci/vpci.c b/xen/drivers/vpci/vpci.c index 647f7af679..98198dc2c9 100644 --- a/xen/drivers/vpci/vpci.c +++ b/xen/drivers/vpci/vpci.c @@ -51,8 +51,12 @@ void vpci_remove_device(struct pci_dev *pdev) xfree(r); } spin_unlock(&pdev->vpci->lock); - if ( pdev->vpci->msix && pdev->vpci->msix->pba ) - iounmap(pdev->vpci->msix->pba); + if ( pdev->vpci->msix ) + { + list_del(&pdev->vpci->msix->next); + if ( pdev->vpci->msix->pba ) + iounmap(pdev->vpci->msix->pba); + } xfree(pdev->vpci->msix); xfree(pdev->vpci->msi); xfree(pdev->vpci); -- generated by git-patchbot for /home/xen/git/xen.git#master
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