Vulnerability Information
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Vulnerability Title
nvme-fabrics: use reserved tag for reg read/write command
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nvme-fabrics: use reserved tag for reg read/write command In some scenarios, if too many commands are issued by nvme command in the same time by user tasks, this may exhaust all tags of admin_q. If a reset (nvme reset or IO timeout) occurs before these commands finish, reconnect routine may fail to update nvme regs due to insufficient tags, which will cause kernel hang forever. In order to workaround this issue, maybe we can let reg_read32()/reg_read64()/reg_write32() use reserved tags. This maybe safe for nvmf: 1. For the disable ctrl path, we will not issue connect command 2. For the enable ctrl / fw activate path, since connect and reg_xx() are called serially. So the reserved tags may still be enough while reg_xx() use reserved tags.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
Linux kernel 安全漏洞
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在某些情况下，如果nvme命令同时发出太多命令，可能会耗尽admin_q的所有标签。如果在这些命令完成之前发生重置（nvme重置或IO超时），重新连接例程可能因标签不足而无法更新nvme寄存器，导致内核永久挂起。
CVSS Information
N/A
Vulnerability Type
N/A