xen/gntdev: don't dereference a null gntdev_dmabuf on allocation failure

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Currently when the allocation of gntdev_dmabuf fails, the error exit
path will call dmabuf_imp_free_storage and causes a null pointer
dereference on gntdev_dmabuf.  Fix this by adding an error exit path
that won't free gntdev_dmabuf.

Detected by CoverityScan, CID#1472124 ("Dereference after null check")

Fixes: bf8dc55b13 ("xen/gntdev: Implement dma-buf import functionality")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>

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Colin Ian King 2018-07-31 15:02:25 +01:00 • committed by Boris Ostrovsky

parent 47b428d14f

commit 2789e83c93

1 changed files with 2 additions and 1 deletions

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drivers/xen/gntdev-dmabuf.c

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