[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen stable-4.15] IOMMU: make domctl handler tolerate NULL domain
commit dc798302e7d4e55f518e10fa00d654abd6695e5c Author: Jan Beulich <jbeulich@xxxxxxxx> AuthorDate: Tue Jun 7 14:18:41 2022 +0200 Commit: Jan Beulich <jbeulich@xxxxxxxx> CommitDate: Tue Jun 7 14:18:41 2022 +0200 IOMMU: make domctl handler tolerate NULL domain Besides the reporter's issue of hitting a NULL deref when !CONFIG_GDBSX, XEN_DOMCTL_test_assign_device can legitimately end up having NULL passed here, when the domctl was passed DOMID_INVALID. Fixes: 71e617a6b8f6 ("use is_iommu_enabled() where appropriate...") Reported-by: Cheyenne Wills <cheyenne.wills@xxxxxxxxx> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx> Reviewed-by: Paul Durrant <paul@xxxxxxx> Reviewed-by: Juergen Gross <jgross@xxxxxxxx> master commit: fa4d84e6dd3c3bfd23a525b75a5483d4ce15adbb master date: 2022-04-26 10:25:54 +0200 --- xen/drivers/passthrough/iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/xen/drivers/passthrough/iommu.c b/xen/drivers/passthrough/iommu.c index 98c6550a36..9a2b1e7808 100644 --- a/xen/drivers/passthrough/iommu.c +++ b/xen/drivers/passthrough/iommu.c @@ -515,7 +515,7 @@ int iommu_do_domctl( { int ret = -ENODEV; - if ( !is_iommu_enabled(d) ) + if ( !(d ? is_iommu_enabled(d) : iommu_enabled) ) return -EOPNOTSUPP; #ifdef CONFIG_HAS_PCI -- generated by git-patchbot for /home/xen/git/xen.git#stable-4.15
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