From: Xi Wang <xi.wang@gmail.com>
Date: Thu, 29 Dec 2011 04:49:06 +0000 (-0500)
Subject: panasonic-laptop: avoid overflow in acpi_pcc_hotkey_add()
X-Git-Tag: v3.3~24^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e424fb8cc4e6634c10f8159b1ff5618cf7bab9c6;p=pandora-kernel.git

panasonic-laptop: avoid overflow in acpi_pcc_hotkey_add()

num_sifr could go negative since acpi_pcc_get_sqty() returns -EINVAL
on error.  Then it could bypass the sanity check (num_sifr > 255).
The subsequent call to kzalloc() would allocate a small buffer, leading
to a memory corruption.

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
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