Description
In the Linux kernel, the following vulnerability has been resolved: iio: health: max30102: fix NULL dereference in interrupt handler The interrupt is requested in max30102_probe() and stays enabled for the lifetime of the device, but indio_dev->active_scan_mask is only valid while a buffer is enabled. When an interrupt arrives while no buffer is enabled, the handler dereferences the NULL active_scan_mask: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 Call trace: __bitmap_weight+0x64/0x98 (P) max30102_interrupt_handler+0x48/0x160 [max30102] Call max30102_fifo_count() at the top of the handler and return early unless it reports a FIFO sample is ready. Because FIFO_RDY is the only interrupt source enabled in max30102_chip_init(), an invocation of max30102_interrupt_handler() without the FIFO_RDY interrupt status bit set carries no data to read and can return before touching active_scan_mask. A negative return from max30102_fifo_count() indicates a failed interrupt status read and is treated the same way.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
90579b69e94bf11ea0745ff003e82a6ce9725f96 to < 2a74f30a7bb305cdc5c3e3e9239b32bb84f3529faffected90579b69e94bf11ea0745ff003e82a6ce9725f96 to < eeb23ba97bd8016e815ef70300b8d34a0a316b90affected90579b69e94bf11ea0745ff003e82a6ce9725f96 to < 60699102827fdb51f9591414165359c8e867f302affected90579b69e94bf11ea0745ff003e82a6ce9725f96 to < 8d6f98972fe2bd6f73f39d982af0c85d766a1503affected90579b69e94bf11ea0745ff003e82a6ce9725f96 to < f0ea4824deebf21dacfbe397c4b0a5fd3e745a8daffected
Linux Linux
Default version status: affected
4.16affected0 to < 4.16unaffected6.6.160 to ≤ 6.6.*unaffected6.12.113 to ≤ 6.12.*unaffected6.18.56 to ≤ 6.18.*unaffected7.2.10 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/2a74f30a7bb305cdc5c3e3e9239b32bb84f3529f ↗
- https://git.kernel.org/stable/c/eeb23ba97bd8016e815ef70300b8d34a0a316b90 ↗
- https://git.kernel.org/stable/c/60699102827fdb51f9591414165359c8e867f302 ↗
- https://git.kernel.org/stable/c/8d6f98972fe2bd6f73f39d982af0c85d766a1503 ↗
- https://git.kernel.org/stable/c/f0ea4824deebf21dacfbe397c4b0a5fd3e745a8d ↗