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Change History

In the Linux kernel, the following vulnerability has been resolved:

wifi: brcmfmac: Fix potential kernel oops when probe fails

When probe of the sdio brcmfmac device fails for some reasons (i.e.
missing firmware), the sdiodev->bus is set to error instead of NULL, thus
the cleanup later in brcmf_sdio_remove() tries to free resources via
invalid bus pointer. This happens because sdiodev->bus is set 2 times:
first in brcmf_sdio_probe() and second time in brcmf_sdiod_probe(). Fix
this by chaning the brcmf_sdio_probe() function to return the error code
and set sdio->bus only there.

https://git.kernel.org/stable/c/243307a0d1b0d01538e202c00454c28b21d4432e

https://git.kernel.org/stable/c/379aac7ee8240848aa35f605b06addb4617c863e

https://git.kernel.org/stable/c/64ccb0aac41c5055780c2a58bbe2c1b362ceccde