PCI: Don't read past the end of sysfs "driver_override" buffer
authorSasha Levin <sasha.levin@oracle.com>
Wed, 4 Feb 2015 22:38:15 +0000 (17:38 -0500)
committerBjorn Helgaas <bhelgaas@google.com>
Tue, 24 Feb 2015 23:35:37 +0000 (17:35 -0600)
commit4efe874aace57dba967624ce1c48322da2447b75
treeba383d9fc961261e699a239fd213d467c1a5bbc8
parentc517d838eb7d07bbe9507871fab3931deccff539
PCI: Don't read past the end of sysfs "driver_override" buffer

When printing the driver_override parameter when it is 4095 and 4094 bytes
long, the printing code would access invalid memory because we need count+1
bytes for printing.

Fixes: 782a985d7af2 ("PCI: Introduce new device binding path using pci_dev.driver_override")
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
CC: stable@vger.kernel.org # v3.16+
CC: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
CC: Alexander Graf <agraf@suse.de>
CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/pci/pci-sysfs.c