CVE-2026-98386scsi: qla2xxx: Use memset_io() to clear QLAFX00 request ring slot

Official description

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Use memset_io() to clear QLAFX00 request ring slot For QLAFX00 the request ring is ioremapped device I/O memory (ha->iobase + req_que_off), not DMA-coherent RAM, which is why the rest of the FX00 path accesses it through memcpy_toio() and the wrt_reg_* helpers. __qla2x00_alloc_iocbs() however zeroed the producer slot with a plain memset(). On architectures such as ARM64 a regular memset() may emit unaligned or block-zeroing instructions (e.g. DC ZVA) that are invalid on Device memory, leading to a synchronous external abort. Use memset_io() to clear the slot for QLAFX00, matching the I/O accessors used elsewhere on this ring. Other adapters keep the plain memset() on their DMA-coherent rings. The zero-fill is retained for FX00 because its IOCB builders (e.g. qlafx00_fxdisc_iocb()) copy only part of the entry and rely on the unused tail being pre-zeroed.

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/0eca1d7a4dac793224e6e295e29e00245e96cf16
• https://git.kernel.org/stable/c/337026cf8149dcfedacd60d6d7081bff10ee5cd4
• https://git.kernel.org/stable/c/6e8f1144d06cfd8cf8c346066efd8f572b28f768
• https://git.kernel.org/stable/c/2df8c8630904794100189fa3d70598642e1877ce
• https://git.kernel.org/stable/c/53eb96c244d150dfb8cc4b5b0492ab53755f3701
• https://git.kernel.org/stable/c/6ee6dfd922fafd508f6bde16de30dd2db796b7a7
• https://git.kernel.org/stable/c/e41d28d9a242c4005b7d01a7ee7769405a6a2c2e
• https://git.kernel.org/stable/c/626e44f3d8a924a97a3848a9fd45833947e081e9