This is a note to let you know that I've just added the patch titled
ASoC: lpass: Fix for KASAN use_after_free out of bounds
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
asoc-lpass-fix-for-kasan-use_after_free-out-of-bounds.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 75e5fab7db0cecb6e16b22c34608f0b40a4c7cd1 Mon Sep 17 00:00:00 2001
From: Ravulapati Vishnu Vardhan Rao <quic_visr@xxxxxxxxxxx>
Date: Thu, 11 May 2023 16:55:32 +0530
Subject: ASoC: lpass: Fix for KASAN use_after_free out of bounds
From: Ravulapati Vishnu Vardhan Rao <quic_visr@xxxxxxxxxxx>
commit 75e5fab7db0cecb6e16b22c34608f0b40a4c7cd1 upstream.
When we run syzkaller we get below Out of Bounds error.
"KASAN: slab-out-of-bounds Read in regcache_flat_read"
Below is the backtrace of the issue:
BUG: KASAN: slab-out-of-bounds in regcache_flat_read+0x10c/0x110
Read of size 4 at addr ffffff8088fbf714 by task syz-executor.4/14144
CPU: 6 PID: 14144 Comm: syz-executor.4 Tainted: G W
Hardware name: Qualcomm Technologies, Inc. sc7280 CRD platform (rev5+) (DT)
Call trace:
dump_backtrace+0x0/0x4ec
show_stack+0x34/0x50
dump_stack_lvl+0xdc/0x11c
print_address_description+0x30/0x2d8
kasan_report+0x178/0x1e4
__asan_report_load4_noabort+0x44/0x50
regcache_flat_read+0x10c/0x110
regcache_read+0xf8/0x5a0
_regmap_read+0x45c/0x86c
_regmap_update_bits+0x128/0x290
regmap_update_bits_base+0xc0/0x15c
snd_soc_component_update_bits+0xa8/0x22c
snd_soc_component_write_field+0x68/0xd4
tx_macro_put_dec_enum+0x1d0/0x268
snd_ctl_elem_write+0x288/0x474
By Error checking and checking valid values issue gets rectifies.
Signed-off-by: Ravulapati Vishnu Vardhan Rao <quic_visr@xxxxxxxxxxx
Link: https://lore.kernel.org/r/20230511112532.16106-1-quic_visr@xxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/soc/codecs/lpass-tx-macro.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/sound/soc/codecs/lpass-tx-macro.c
+++ b/sound/soc/codecs/lpass-tx-macro.c
@@ -743,6 +743,8 @@ static int tx_macro_put_dec_enum(struct
struct tx_macro *tx = snd_soc_component_get_drvdata(component);
val = ucontrol->value.enumerated.item[0];
+ if (val >= e->items)
+ return -EINVAL;
switch (e->reg) {
case CDC_TX_INP_MUX_ADC_MUX0_CFG0:
@@ -769,6 +771,9 @@ static int tx_macro_put_dec_enum(struct
case CDC_TX_INP_MUX_ADC_MUX7_CFG0:
mic_sel_reg = CDC_TX7_TX_PATH_CFG0;
break;
+ default:
+ dev_err(component->dev, "Error in configuration!!\n");
+ return -EINVAL;
}
if (val != 0) {
Patches currently in stable-queue which might be from quic_visr@xxxxxxxxxxx are
queue-5.15/asoc-lpass-fix-for-kasan-use_after_free-out-of-bounds.patch
