drm/vmwgfx: limit the number of mip levels in vmw_gb_surface_define_ioctl()

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commit ee9c4e681e upstream.

The 'req->mip_levels' parameter in vmw_gb_surface_define_ioctl() is
a user-controlled 'uint32_t' value which is used as a loop count limit.
This can lead to a kernel lockup and DoS. Add check for 'req->mip_levels'.

References:
https://bugzilla.redhat.com/show_bug.cgi?id=1437431

Signed-off-by: Vladis Dronov <vdronov@redhat.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Vladis Dronov 2017-06-02 07:42:09 +02:00 • committed by Greg Kroah-Hartman

parent 64c21af51d

commit a76ff84701

1 changed files with 3 additions and 0 deletions

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drivers/gpu/drm/vmwgfx/vmwgfx_surface.c

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