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| author | Ravulapati Vishnu Vardhan Rao | 2023-05-11 16:55:32 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2023-05-30 14:03:20 +0100 |
| commit | 8d81d3b0ed3610d24191d24f8e9e20f6775f0cc5 (patch) | |
| tree | 113505b003689740debf0cc8d98f3398d9d81445 /sound | |
| parent | 53764a17f5d8f0d00b13297d06b5e65fa844288b (diff) | |
ASoC: lpass: Fix for KASAN use_after_free out of bounds
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@quicinc.com
Link: https://lore.kernel.org/r/20230511112532.16106-1-quic_visr@quicinc.com
Signed-off-by: Mark Brown <broonie@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/codecs/lpass-tx-macro.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sound/soc/codecs/lpass-tx-macro.c b/sound/soc/codecs/lpass-tx-macro.c index d1d9d8d2df2d..9f59518005a5 100644 --- a/sound/soc/codecs/lpass-tx-macro.c +++ b/sound/soc/codecs/lpass-tx-macro.c @@ -745,6 +745,8 @@ static int tx_macro_put_dec_enum(struct snd_kcontrol *kcontrol, 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: @@ -771,6 +773,9 @@ static int tx_macro_put_dec_enum(struct snd_kcontrol *kcontrol, 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) { |