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drm/amdkfd: check for null dev to avoid a null pointer dereference

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The call to kfd_device_by_id can potentially return null, so check that
dev is null and return with -EINVAL to avoid a null pointer dereference.

Detected by CoverityScan CID#1454629 ("Dereference null return value")

Fixes: 5d71dbc3a588 ("drm/amdkfd: Implement image tiling mode support v2")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
This commit is contained in:
Colin Ian King 2017-09-08 15:13:33 +01:00 committed by Oded Gabbay
parent 56eac98b8a
commit bfaa1ce809
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
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@ -892,6 +892,8 @@ static int kfd_ioctl_get_tile_config(struct file *filep,
int err = 0;
dev = kfd_device_by_id(args->gpu_id);
if (!dev)
return -EINVAL;
dev->kfd2kgd->get_tile_config(dev->kgd, &config);