CVE-2022-49569
Description
In the Linux kernel, the following vulnerability has been resolved: spi: bcm2835: bcm2835_spi_handle_err(): fix NULL pointer deref for non DMA transfers In case a IRQ based transfer times out the bcm2835_spi_handle_err() function is called. Since commit 1513ceee70f2 ("spi: bcm2835: Drop dma_pending flag") the TX and RX DMA transfers are unconditionally canceled, leading to NULL pointer derefs if ctlr->dma_tx or ctlr->dma_rx are not set. Fix the NULL pointer deref by checking that ctlr->dma_tx and ctlr->dma_rx are valid pointers before accessing them.
How to fix
- linux linux_kernel5.4.208, 5.10.134, 5.15.58, 5.18.15 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.4 ≤ v < 5.4.208, 5.5 ≤ v < 5.10.134, 5.11 ≤ v < 5.15.58, 5.16 ≤ v < 5.18.15, 5.19 | 5.4.208, 5.10.134, 5.15.58, 5.18.15 |
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