CVE-2026-98676iio: adc: ade9000: fix NULL pointer dereference in clkout registration

Official description

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.

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/d2400175228fbc10b29c49a7b5f70a7e80d144dd
• https://git.kernel.org/stable/c/134aa31a8d4e71f6ab1d155ad7b4502508832f72
• https://git.kernel.org/stable/c/49ee1c6a3ebda6b7de06b2961b0e09c1c3fe536a