CVE-2026-98664iio: imu: adis16400: fix unprotected debugfs reads

Official description

In the Linux kernel, the following vulnerability has been resolved: iio: imu: adis16400: fix unprotected debugfs reads adis16400_serial_number_fops is open coded and never calls debugfs_file_get(), so debugfs_remove_recursive() does not wait for a read in progress and unbind frees the iio_dev underneath it. Commit ae1d37a9bb4b ("iio: imu: adis16400: use DEFINE_DEBUGFS_ATTRIBUTE instead of DEFINE_SIMPLE_ATTRIBUTE") converted product_id and flash_count to DEFINE_DEBUGFS_ATTRIBUTE, which protects itself, but moved all three files to debugfs_create_file_unsafe(). serial_number prints three registers as "%.4x-%.4x-%.4x" and DEFINE_DEBUGFS_ATTRIBUTE() formats a single u64, so it cannot be converted without changing what the file returns. adis16475 and adis16550 already use debugfs_create_file() for their open coded files. Use it here too.

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/48bb3c9b4a2fac64cb17c357418ebfbd4c9ac8ff
• https://git.kernel.org/stable/c/69cc001761894c65a0eef1bb6df911b39d30d71e
• https://git.kernel.org/stable/c/d32eb2161b452a25b03f915f431bdcb9722cd92c
• https://git.kernel.org/stable/c/d3078aaef8af4648f94eeafde4b7b36efd9838d1
• https://git.kernel.org/stable/c/e9b4c00f775a915b759b08bfe2c5e806a8301a59
• https://git.kernel.org/stable/c/50e8d70ba0743f88afd7e49f9cebd1841ee677f5
• https://git.kernel.org/stable/c/f501302ebb9e1504162351b951fe3ae331c852ab
• https://git.kernel.org/stable/c/d94787287a113a1326211647d5e0deed1e9de105