| commit | f959dcd6ddfd29235030e8026471ac1b022ad2b0 | [log] [tgz] |
|---|---|---|
| author | Thomas Tai <thomas.tai@oracle.com> | Thu Sep 17 18:43:03 2020 +0200 |
| committer | Christoph Hellwig <hch@lst.de> | Thu Sep 17 18:43:20 2020 +0200 |
| tree | b3bb71e9171c97f693240bdeb3e9ad2f0a5d580c | |
| parent | a92df4f62fda02e6b141e2b0bb52ccc486264b1c [diff] |
dma-direct: Fix potential NULL pointer dereference When booting the kernel v5.9-rc4 on a VM, the kernel would panic when printing a warning message in swiotlb_map(). The dev->dma_mask must not be a NULL pointer when calling the dma mapping layer. A NULL pointer check can potentially avoid the panic. Signed-off-by: Thomas Tai <thomas.tai@oracle.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de>