From: Elinor Montmasson <elinor.montmasson(a)savoirfairelinux.com>
mainline inclusion
from mainline-v6.10-rc6
commit 90f3feb24172185f1832636264943e8b5e289245
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/IAGEP3
CVE: CVE-2024-42089
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?…
-------------------------------------------
priv->pdev pointer was set after being used in
fsl_asoc_card_audmux_init().
Move this assignment at the start of the probe function, so
sub-functions can correctly use pdev through priv.
fsl_asoc_card_audmux_init() dereferences priv->pdev to get access to the
dev struct, used with dev_err macros.
As priv is zero-initialised, there would be a NULL pointer dereference.
Note that if priv->dev is dereferenced before assignment but never used,
for example if there is no error to be printed, the driver won't crash
probably due to compiler optimisations.
Fixes: 708b4351f08c ("ASoC: fsl: Add Freescale Generic ASoC Sound Card with ASRC support")
Signed-off-by: Elinor Montmasson <elinor.montmasson(a)savoirfairelinux.com>
Link: https://patch.msgid.link/20240620132511.4291-2-elinor.montmasson@savoirfair…
Signed-off-by: Mark Brown <broonie(a)kernel.org>
Signed-off-by: Ye Bin <yebin10(a)huawei.com>
---
sound/soc/fsl/fsl-asoc-card.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/sound/soc/fsl/fsl-asoc-card.c b/sound/soc/fsl/fsl-asoc-card.c
index 5f181b89838a..f76252b3f591 100644
--- a/sound/soc/fsl/fsl-asoc-card.c
+++ b/sound/soc/fsl/fsl-asoc-card.c
@@ -559,6 +559,8 @@ static int fsl_asoc_card_probe(struct platform_device *pdev)
if (!priv)
return -ENOMEM;
+ priv->pdev = pdev;
+
cpu_np = of_parse_phandle(np, "audio-cpu", 0);
/* Give a chance to old DT binding */
if (!cpu_np)
@@ -781,7 +783,6 @@ static int fsl_asoc_card_probe(struct platform_device *pdev)
}
/* Initialize sound card */
- priv->pdev = pdev;
priv->card.dev = &pdev->dev;
priv->card.owner = THIS_MODULE;
ret = snd_soc_of_parse_card_name(&priv->card, "model");
--
2.31.1