CVE-2026-80790

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

nvmet-fc: fix invalid free in LS IOD error path

nvmetfcalloclsiodlist() advances iod while initializing the LS IOD array. If an rqstbuf allocation or response buffer DMA mapping fails, the unwind loop decrements iod past the start of the array. The final kfree(iod) therefore frees an address before the allocated object.

This can be reproduced with nvme-fcloop and failslab by setting fail-nth to 6 before creating a target port. KASAN reports:

BUG: KASAN: invalid-free in nvmetfcregistertargetport Free of addr ffff88816cf8ff48 by task nvmetfail_nth/9552

Free the original allocation base stored in tgtport->iod instead. With this fix applied, the same sysfs write with fail-nth=6 returns -ENOMEM without any KASAN report.