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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2018-03-22 18:22:33 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-30 08:52:27 +0300 |
| commit | 1366b31d18297ff1879f0becf941425503408447 (patch) | |
| tree | 32ef43fcc10ee3a3d87b34dd3c07c779af37c0e0 /drivers/iommu | |
| parent | 6bc2bf6023dde77b77f183e89c7690cb3f4f0f2d (diff) | |
| download | linux-1366b31d18297ff1879f0becf941425503408447.tar.xz | |
iommu/amd: Take into account that alloc_dev_data() may return NULL
[ Upstream commit 39ffe39545cd5cb5b8cee9f0469165cf24dc62c2 ]
find_dev_data() does not check whether the return value alloc_dev_data()
is NULL. This was okay once because the pointer was returned once as-is.
Since commit df3f7a6e8e85 ("iommu/amd: Use is_attach_deferred
call-back") the pointer may be used within find_dev_data() so a NULL
check is required.
Cc: Baoquan He <bhe@redhat.com>
Fixes: df3f7a6e8e85 ("iommu/amd: Use is_attach_deferred call-back")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 99a2a57b6cfd..10190e361a13 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -311,6 +311,8 @@ static struct iommu_dev_data *find_dev_data(u16 devid) if (dev_data == NULL) { dev_data = alloc_dev_data(devid); + if (!dev_data) + return NULL; if (translation_pre_enabled(iommu)) dev_data->defer_attach = true; |