V4L/DVB: ivtvfb: prevent reading uninitialized stack memory

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The FBIOGET_VBLANK device ioctl allows unprivileged users to read 16
bytes of uninitialized stack memory, because the "reserved" member of
the fb_vblank struct declared on the stack is not altered or zeroed
before being copied back to the user.  This patch takes care of it.

Signed-off-by: Dan Rosenberg <dan.j.rosenberg@gmail.com>
Signed-off-by: Andy Walls <awalls@md.metrocast.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

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Dan Rosenberg 2010-09-15 18:44:22 -03:00 • committed by Mauro Carvalho Chehab

parent fc00a1d90d

commit 4057079855

1 changed files with 2 additions and 0 deletions

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drivers/media/video/ivtv/ivtvfb.c

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