جزئیات آسیب‌پذیری

In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Skip vport under deletion in report ID acquisition qla24xx_report_id_acquisition() format-1 handling walks ha->vp_list under vport_slock, takes a vref_count on the matching vport and calls qla_update_host_map() to register its port id. A vport teardown via qla24xx_vport_delete() sets VPORT_DELETE, then qla24xx_disable_vp() removes the vport from the host_map btree and zeroes vha->d_id (RESET_AL_PA). The vport is only unlinked from vp_list later, in qla24xx_deallocate_vp_id(), which clears vp_map[idx] (RESET_VP_IDX) but does not touch host_map. In the window in between, report ID acquisition can still find the vport on vp_list and call qla_update_host_map(); with d_id already zeroed it takes the btree_insert32() path and re-inserts the dying vport into host_map. Nothing cleans that entry afterwards, so once scsi_host_put() frees the vha a later host_map lookup dereferences freed memory. Skip a vport that has VPORT_DELETE set before taking the reference, so it is neither re-registered nor scheduled for DPC re-registration. This mirrors the existing guard in qla2x00_alert_all_vps().

• https://git.kernel.org/stable/c/d3ac7e0f454c7d52c0c2e5ecaf5a3d938f1b166d
• https://git.kernel.org/stable/c/40dcd4a71a52414b47fbba2f956387f1077c6c15
• https://git.kernel.org/stable/c/20bb54601d2655e83795b73499c89f6b1cb31016
• https://git.kernel.org/stable/c/d61e8de98c5a52978fb1edd95fe4dde3131b280e
• https://git.kernel.org/stable/c/7a83979d92782f83c90888ebe19bdc9420521940
• https://git.kernel.org/stable/c/23582731afa35031c94fadb71a4f3b4afd094649