drm/vmwgfx: avoid calling vzalloc with a 0 size in vmw_get_cap_3d_ioctl()

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commit 63774069d9 upstream.

In vmw_get_cap_3d_ioctl(), a user can supply 0 for a size that is
used in vzalloc(). This eventually calls dump_stack() (in warn_alloc()),
which can leak useful addresses to dmesg.

Add check to avoid a size of 0.

Signed-off-by: Murray McAllister <murray.mcallister@insomniasec.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Murray McAllister 2017-03-27 11:15:12 +02:00 • committed by Greg Kroah-Hartman

parent 73ab72517b

commit 604d2eac67

1 changed files with 1 additions and 1 deletions

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drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c

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