From: Joerg Roedel <joro@8bytes.org> To: iommu@lists.linux-foundation.org Cc: linux-kernel@vger.kernel.org, Joerg Roedel <jroedel@suse.de>, stable@vger.kernel.org Subject: [PATCH] iommu: Check dev->iommu in dev_iommu_priv_get() before dereferencing it Date: Tue, 2 Feb 2021 15:54:19 +0100 [thread overview] Message-ID: <20210202145419.29143-1-joro@8bytes.org> (raw) From: Joerg Roedel <jroedel@suse.de> The dev_iommu_priv_get() needs a similar check to dev_iommu_fwspec_get() to make sure no NULL-ptr is dereferenced. Fixes: 05a0542b456e1 ("iommu/amd: Store dev_data as device iommu private data") Reference: https://bugzilla.kernel.org/show_bug.cgi?id=211241 Cc: stable@vger.kernel.org # v5.8+ Signed-off-by: Joerg Roedel <jroedel@suse.de> --- include/linux/iommu.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 524ffc2ff64f..5b3a7a08dc70 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -616,7 +616,10 @@ static inline void dev_iommu_fwspec_set(struct device *dev, static inline void *dev_iommu_priv_get(struct device *dev) { - return dev->iommu->priv; + if (dev->iommu) + return dev->iommu->priv; + else + return NULL; } static inline void dev_iommu_priv_set(struct device *dev, void *priv) -- 2.30.0
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From: Joerg Roedel <joro@8bytes.org> To: iommu@lists.linux-foundation.org Cc: Joerg Roedel <jroedel@suse.de>, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH] iommu: Check dev->iommu in dev_iommu_priv_get() before dereferencing it Date: Tue, 2 Feb 2021 15:54:19 +0100 [thread overview] Message-ID: <20210202145419.29143-1-joro@8bytes.org> (raw) From: Joerg Roedel <jroedel@suse.de> The dev_iommu_priv_get() needs a similar check to dev_iommu_fwspec_get() to make sure no NULL-ptr is dereferenced. Fixes: 05a0542b456e1 ("iommu/amd: Store dev_data as device iommu private data") Reference: https://bugzilla.kernel.org/show_bug.cgi?id=211241 Cc: stable@vger.kernel.org # v5.8+ Signed-off-by: Joerg Roedel <jroedel@suse.de> --- include/linux/iommu.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 524ffc2ff64f..5b3a7a08dc70 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -616,7 +616,10 @@ static inline void dev_iommu_fwspec_set(struct device *dev, static inline void *dev_iommu_priv_get(struct device *dev) { - return dev->iommu->priv; + if (dev->iommu) + return dev->iommu->priv; + else + return NULL; } static inline void dev_iommu_priv_set(struct device *dev, void *priv) -- 2.30.0 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
next reply other threads:[~2021-02-02 14:56 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-02-02 14:54 Joerg Roedel [this message] 2021-02-02 14:54 ` [PATCH] iommu: Check dev->iommu in dev_iommu_priv_get() before dereferencing it Joerg Roedel
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