Re: [PATCH v4] drm/ast: Fixed CVE for DP501

2021-04-12 Thread Thomas Zimmermann
Hi this patch produces a NULL-ptr deref as shown below. The chip is detected as AST 2100. Best regards Thomas == [ 23.641896] BUG: KASAN: null-ptr-deref in ast_device_create.cold+0x137/0x210 [ast] [ 23.642257] Read of

[PATCH v4] drm/ast: Fixed CVE for DP501

2021-04-08 Thread KuoHsiang Chou
[Bug][DP501] If ASPEED P2A (PCI to AHB) bridge is disabled and disallowed for CVE_2019_6260 item3, and then the monitor's EDID is unable read through Parade DP501. The reason is the DP501's FW is mapped to BMC addressing space rather than Host addressing space. The resolution is that using