tree 1540cbc5fd9d3024c1f14d48ea6172bbbafcf85f
parent 8e071518d17a61ef07a388b5e3c4363e771225c1
author David Arcari <darcari@redhat.com> 1535397548 -0400
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1542136098 -0800

mailbox: PCC: handle parse error

commit afd0b1fb22269f48d68fdf269891c653818c8047 upstream.

acpi_pcc_probe() calls acpi_table_parse_entries_array() but fails
to check for an error return.  This in turn can result in calling
kcalloc() with a negative count as well as emitting the following
misleading erorr message:

[    2.642015] Could not allocate space for PCC mbox channels

Fixes: 8f8027c5f935 (mailbox: PCC: erroneous error message when parsing ACPI PCCT)
Signed-off-by: David Arcari <darcari@redhat.com>
Reviewed-by: Al Stone <ahs3@redhat.com>
Cc: 4.18+ <stable@vger.kernel.org> # 4.18+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>