drm/vmwgfx: Potential off by one in vmw_view_add()

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The vmw_view_cmd_to_type() function returns vmw_view_max (3) on error.
It's one element beyond the end of the vmw_view_cotables[] table.

My read on this is that it's possible to hit this failure.  header->id
comes from vmw_cmd_check() and it's a user controlled number between
1040 and 1225 so we can hit that error.  But I don't have the hardware
to test this code.

Fixes: d80efd5cb3 ("drm/vmwgfx: Initial DX support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Cc: <stable@vger.kernel.org>

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Dan Carpenter 2018-01-10 12:40:04 +03:00 • committed by Thomas Hellstrom

parent 98648ae6ef

commit 0d9cac0ca0

1 changed files with 2 additions and 0 deletions

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drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c

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