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cciss: fix info leak in cciss_ioctl32_passthru()
The arg64 struct has a hole after ->buf_size which isn't cleared. Or if any of the calls to copy_from_user() fail then that would cause an information leak as well. This was assigned CVE-2013-2147. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Mike Miller <mike.miller@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -1189,6 +1189,7 @@ static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
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int err;
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u32 cp;
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memset(&arg64, 0, sizeof(arg64));
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err = 0;
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err |=
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copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
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