CVE-2024-41082

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> nvme-fabrics: use reserved tag for reg read/write command<br /> <br /> In some scenarios, if too many commands are issued by nvme command in<br /> the same time by user tasks, this may exhaust all tags of admin_q. If<br /> a reset (nvme reset or IO timeout) occurs before these commands finish,<br /> reconnect routine may fail to update nvme regs due to insufficient tags,<br /> which will cause kernel hang forever. In order to workaround this issue,<br /> maybe we can let reg_read32()/reg_read64()/reg_write32() use reserved<br /> tags. This maybe safe for nvmf:<br /> <br /> 1. For the disable ctrl path, we will not issue connect command<br /> 2. For the enable ctrl / fw activate path, since connect and reg_xx()<br /> are called serially.<br /> <br /> So the reserved tags may still be enough while reg_xx() use reserved tags.