جزئیات آسیب‌پذیری

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Clear cmds after chip reset Commit aefed3e5548f ("scsi: qla2xxx: target: Fix offline port handling and host reset handling") caused two problems: 1. Commands sent to FW, after chip reset got stuck and never freed as FW is not going to respond to them anymore. 2. BUG_ON(cmd->sg_mapped) in qlt_free_cmd(). Commit 26f9ce53817a ("scsi: qla2xxx: Fix missed DMA unmap for aborted commands") attempted to fix this, but introduced another bug under different circumstances when two different CPUs were racing to call qlt_unmap_sg() at the same time: BUG_ON(!valid_dma_direction(dir)) in dma_unmap_sg_attrs(). So revert "scsi: qla2xxx: Fix missed DMA unmap for aborted commands" and partially revert "scsi: qla2xxx: target: Fix offline port handling and host reset handling" at __qla2x00_abort_all_cmds.

• https://git.kernel.org/stable/c/e87e9f92d7735895b7dd97f53dce6d95d08cf29c
• https://git.kernel.org/stable/c/0d0a1a267c1ee7c41aeffdca84afcb113787a91a
• https://git.kernel.org/stable/c/c82c0fbb97d0fd44324eb55ab758408c7c964b32
• https://git.kernel.org/stable/c/5c1fb3fd05da3d55b8cbc42d7d660b313cbdc936
• https://git.kernel.org/stable/c/d46c69a087aa3d1513f7a78f871b80251ea0c1ae