Messages in this thread Patch in this message | | | Date | Tue, 10 Nov 2009 20:11:55 +0100 | From | Roel Kluin <> | Subject | [PATCH] ALSA: possible read past array alc88[02]_parse_auto_config() |
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The test of index `i' is after the read - too late - and unsafe: if snd_hda_get_connections() fails in the last iteration a read beyond the array is possible.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com> --- sound/pci/hda/patch_realtek.c | 8 ++++---- 1 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c index ff20048..fd094f5 100644 --- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -4684,9 +4684,9 @@ static int alc880_parse_auto_config(struct hda_codec *codec) spec->multiout.dig_out_nid = dig_nid; else { spec->multiout.slave_dig_outs = spec->slave_dig_outs; - spec->slave_dig_outs[i - 1] = dig_nid; - if (i == ARRAY_SIZE(spec->slave_dig_outs) - 1) + if (i >= ARRAY_SIZE(spec->slave_dig_outs) - 1) break; + spec->slave_dig_outs[i - 1] = dig_nid; } } if (spec->autocfg.dig_in_pin) @@ -9813,9 +9813,9 @@ static int alc882_parse_auto_config(struct hda_codec *codec) spec->multiout.dig_out_nid = dig_nid; else { spec->multiout.slave_dig_outs = spec->slave_dig_outs; - spec->slave_dig_outs[i - 1] = dig_nid; - if (i == ARRAY_SIZE(spec->slave_dig_outs) - 1) + if (i >= ARRAY_SIZE(spec->slave_dig_outs) - 1) break; + spec->slave_dig_outs[i - 1] = dig_nid; } } if (spec->autocfg.dig_in_pin)
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