Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: spi: spi-zynqmp-gqspi: return -ENOMEM if dma_map_single fails The spi controller supports 44-bit address space on AXI in DMA mode, so set dma_addr_t width to 44-bit to avoid using a swiotlb mapping. In addition, if dma_map_single fails, it should return immediately instead of continuing doing the DMA operation which bases on invalid address. This fixes the following crash which occurs in reading a big block from flash: [ 123.633577] zynqmp-qspi ff0f0000.spi: swiotlb buffer is full (sz: 4194304 bytes), total 32768 (slots), used 0 (slots) [ 123.644230] zynqmp-qspi ff0f0000.spi: ERR:rxdma:memory not mapped [ 123.784625] Unable to handle kernel paging request at virtual address 00000000003fffc0 [ 123.792536] Mem abort info: [ 123.795313] ESR = 0x96000145 [ 123.798351] EC = 0x25: DABT (current EL), IL = 32 bits [ 123.803655] SET = 0, FnV = 0 [ 123.806693] EA = 0, S1PTW = 0 [ 123.809818] Data abort info: [ 123.812683] ISV = 0, ISS = 0x00000145 [ 123.816503] CM = 1, WnR = 1 [ 123.819455] user pgtable: 4k pages, 48-bit VAs, pgdp=0000000805047000 [ 123.825887] [00000000003fffc0] pgd=0000000803b45003, p4d=0000000803b45003, pud=0000000000000000 [ 123.834586] Internal error: Oops: 96000145 [#1] PREEMPT SMP
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.10, < 5.10.37 |
References
- https://git.kernel.org/stable/c/126bdb606fd2802454e6048caef1be3e25dd121ePatch
- https://git.kernel.org/stable/c/5980a3b9c933408bc22b0e349b78c3ebd7cbf880Patch
- https://git.kernel.org/stable/c/bad5a23cf2b477fa78b85fd392736dae09a1e818Patch
- https://git.kernel.org/stable/c/c26c026eb496261dbc0adbf606cc81989cd2038cPatch
- https://git.kernel.org/stable/c/126bdb606fd2802454e6048caef1be3e25dd121ePatch
- https://git.kernel.org/stable/c/5980a3b9c933408bc22b0e349b78c3ebd7cbf880Patch
- https://git.kernel.org/stable/c/bad5a23cf2b477fa78b85fd392736dae09a1e818Patch
- https://git.kernel.org/stable/c/c26c026eb496261dbc0adbf606cc81989cd2038cPatch
FAQ
What is CVE-2021-47047?
CVE-2021-47047 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: spi: spi-zynqmp-gqspi: return -ENOMEM if dma_map_single fails The spi controller supports 44-bit address space on AXI in DMA mode,...
How severe is CVE-2021-47047?
CVE-2021-47047 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-47047?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.