From: Kuninori Morimoto Date: Mon, 13 Mar 2023 00:50:28 +0000 (+0000) Subject: ALSA: hda/ca0132: fixup buffer overrun at tuning_ctl_set() X-Git-Tag: v5.4.240~41 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=7f12f99b8017ad5ed5aff4b0aefe3bb7bbdf8a99;p=thirdparty%2Fkernel%2Fstable.git ALSA: hda/ca0132: fixup buffer overrun at tuning_ctl_set() [ Upstream commit 98e5eb110095ec77cb6d775051d181edbf9cd3cf ] tuning_ctl_set() might have buffer overrun at (X) if it didn't break from loop by matching (A). static int tuning_ctl_set(...) { for (i = 0; i < TUNING_CTLS_COUNT; i++) (A) if (nid == ca0132_tuning_ctls[i].nid) break; snd_hda_power_up(...); (X) dspio_set_param(..., ca0132_tuning_ctls[i].mid, ...); snd_hda_power_down(...); ^ return 1; } We will get below error by cppcheck sound/pci/hda/patch_ca0132.c:4229:2: note: After for loop, i has value 12 for (i = 0; i < TUNING_CTLS_COUNT; i++) ^ sound/pci/hda/patch_ca0132.c:4234:43: note: Array index out of bounds dspio_set_param(codec, ca0132_tuning_ctls[i].mid, 0x20, ^ This patch cares non match case. Signed-off-by: Kuninori Morimoto Link: https://lore.kernel.org/r/87sfe9eap7.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin --- diff --git a/sound/pci/hda/patch_ca0132.c b/sound/pci/hda/patch_ca0132.c index 574c39120df86..f9582053878df 100644 --- a/sound/pci/hda/patch_ca0132.c +++ b/sound/pci/hda/patch_ca0132.c @@ -3843,8 +3843,10 @@ static int tuning_ctl_set(struct hda_codec *codec, hda_nid_t nid, for (i = 0; i < TUNING_CTLS_COUNT; i++) if (nid == ca0132_tuning_ctls[i].nid) - break; + goto found; + return -EINVAL; +found: snd_hda_power_up(codec); dspio_set_param(codec, ca0132_tuning_ctls[i].mid, 0x20, ca0132_tuning_ctls[i].req,