ALSA: opl3: Hardening for potential Spectre v1

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commit 7f054a5bee upstream.

As recently Smatch suggested, one place in OPL3 driver may expand the
array directly from the user-space value with speculation:
  sound/drivers/opl3/opl3_synth.c:476 snd_opl3_set_voice() warn: potential spectre issue 'snd_opl3_regmap'

This patch puts array_index_nospec() for hardening against it.

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

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Takashi Iwai 2018-04-24 07:56:07 +02:00 • committed by Ben Hutchings

parent 8b823689f2

commit 116c19f0b0

1 changed files with 5 additions and 2 deletions

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sound/drivers/opl3/opl3_synth.c

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