ASoC: fsl-asoc-card: set priv->pdev before using it

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: ASoC: fsl-asoc-card: set priv->pdev before using it 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.

References

• https://git.kernel.org/stable/c/ae81535ce2503aabc4adab3472f4338070cdeb6a
• https://git.kernel.org/stable/c/8896e18b7c366f8faf9344abfd0971435f1c723a
• https://git.kernel.org/stable/c/3662eb2170e59b58ad479982dc1084889ba757b9
• https://git.kernel.org/stable/c/544ab46b7ece6d6bebbdee5d5659c0a0f804a99a
• https://git.kernel.org/stable/c/8faf91e58425c2f6ce773250dfd995f1c2d461ac
• https://git.kernel.org/stable/c/29bc9e7c75398b0d12fc30955f2e9b2dd29ffaed
• https://git.kernel.org/stable/c/7c18b4d89ff9c810b6e562408afda5ce165c4ea6
• https://git.kernel.org/stable/c/90f3feb24172185f1832636264943e8b5e289245