iio: adc: ade9000: fix NULL pointer dereference in clkout registration

In the Linux kernel, the following vulnerability has been resolved: iio: adc: ade9000: fix NULL pointer dereference in clkout registration ade9000_setup_clkout() passes NULL as the register address when registering a divider clock. During clock registration, the common clock framework calls clk_divider_recalc_rate(), which dereferences the address through readl(). As a result, probing an ADE9000 configured as a clock provider with an external input clock crashes. CLKOUT passes CLKIN through without changing its rate. Register it as a 1:1 fixed-factor clock, which does not require register access. This change does not affect the configuration using the internal clock, for which the driver does not register a clock provider.

Source published

18 Oct 2026 15:45:31 UTC

Source modified

19 Oct 2026 09:23:45 UTC

Observed here

23 Oct 2026 15:48:27 UTC

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