CVE-2023-54255

Summary

In the Linux kernel, the following vulnerability has been resolved:

sh: dma: Fix DMA channel offset calculation

Various SoCs of the SH3, SH4 and SH4A family, which use this driver, feature a differing number of DMA channels, which can be distributed between up to two DMAC modules. The existing implementation fails to correctly accommodate for all those variations, resulting in wrong channel offset calculations and leading to kernel panics.

Rewrite dma_base_addr() in order to properly calculate channel offsets in a DMAC module. Fix dmaor_read_reg() and dmaor_write_reg(), so that the correct DMAC module base is selected for the DMAOR register.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7f47c7189b3e8f19a589f77a3ad169d7b691b582 < bca700b48c72f4ffeee977a2ed0eb4a6b4b7b8adaffected
LinuxLinux7f47c7189b3e8f19a589f77a3ad169d7b691b582 < 479380acfa63247b5ac62476138f847aefc62692affected
LinuxLinux7f47c7189b3e8f19a589f77a3ad169d7b691b582 < 4989627157735c1f1619f08e5bc1592418e7c878affected
LinuxLinux7f47c7189b3e8f19a589f77a3ad169d7b691b582 < d1c946552af299f4fa85bf7da15e328123771128affected
LinuxLinux7f47c7189b3e8f19a589f77a3ad169d7b691b582 < 196f6c71905aa384c0177acf194a1144d480333baffected
LinuxLinux7f47c7189b3e8f19a589f77a3ad169d7b691b582 < 8fb11fa4805699c6b73a9c8a9d45807f9874abe3affected
LinuxLinux7f47c7189b3e8f19a589f77a3ad169d7b691b582 < e9e33faea104381bac80ac79328f0540fc2969f2affected
LinuxLinux7f47c7189b3e8f19a589f77a3ad169d7b691b582 < e82e47584847129a20b8c9f4a1dcde09374fb0e0affected
LinuxLinux3.5affected
LinuxLinux0 < 3.5unaffected
LinuxLinux4.14.322 <= 4.14.*unaffected
LinuxLinux4.19.291 <= 4.19.*unaffected
LinuxLinux5.4.251 <= 5.4.*unaffected
LinuxLinux5.10.188 <= 5.10.*unaffected
LinuxLinux5.15.121 <= 5.15.*unaffected
LinuxLinux6.1.39 <= 6.1.*unaffected
LinuxLinux6.4.4 <= 6.4.*unaffected
LinuxLinux6.5 <= *unaffected

Weaknesses

References