tree 14fed608682d7de7c2a66245a06b6e79a1b39b14
parent 7f054a5bee0987f1e2d4e59daea462421c76f2cb
author Takashi Iwai <tiwai@suse.de> 1524549708 +0200
committer Takashi Iwai <tiwai@suse.de> 1524645467 +0200

ALSA: asihpi: Hardening for potential Spectre v1

As recently Smatch suggested, a couple of places in ASIHPI driver may
expand the array directly from the user-space value with speculation:
  sound/pci/asihpi/hpimsginit.c:70 hpi_init_response() warn: potential spectre issue 'res_size' (local cap)
  sound/pci/asihpi/hpioctl.c:189 asihpi_hpi_ioctl() warn: potential spectre issue 'adapters'

This patch puts array_index_nospec() for hardening against them.

BugLink: https://marc.info/?l=linux-kernel&m=152411496503418&w=2
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>