diff options
Diffstat (limited to 'gnu/packages/patches/qemu-CVE-2015-4106-pt2.patch')
| -rw-r--r-- | gnu/packages/patches/qemu-CVE-2015-4106-pt2.patch | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/gnu/packages/patches/qemu-CVE-2015-4106-pt2.patch b/gnu/packages/patches/qemu-CVE-2015-4106-pt2.patch new file mode 100644 index 0000000000..2eeb7ef0af --- /dev/null +++ b/gnu/packages/patches/qemu-CVE-2015-4106-pt2.patch @@ -0,0 +1,81 @@ +From d61bb2482dc0c7426f451f23ba7e2748ae2cc06d Mon Sep 17 00:00:00 2001 +From: Jan Beulich <jbeulich@suse.com> +Date: Tue, 2 Jun 2015 15:07:01 +0000 +Subject: [PATCH] xen/pt: consolidate PM capability emu_mask + +There's no point in xen_pt_pmcsr_reg_{read,write}() each ORing +PCI_PM_CTRL_STATE_MASK and PCI_PM_CTRL_NO_SOFT_RESET into a local +emu_mask variable - we can have the same effect by setting the field +descriptor's emu_mask member suitably right away. Note that +xen_pt_pmcsr_reg_write() is being retained in order to allow later +patches to be less intrusive. + +This is a preparatory patch for XSA-131. + +Signed-off-by: Jan Beulich <jbeulich@suse.com> +Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> +Acked-by: Ian Campbell <ian.campbell@citrix.com> +--- + hw/xen/xen_pt_config_init.c | 25 ++++--------------------- + 1 file changed, 4 insertions(+), 21 deletions(-) + +diff --git a/hw/xen/xen_pt_config_init.c b/hw/xen/xen_pt_config_init.c +index 436d0fd..516236a 100644 +--- a/hw/xen/xen_pt_config_init.c ++++ b/hw/xen/xen_pt_config_init.c +@@ -933,38 +933,21 @@ static XenPTRegInfo xen_pt_emu_reg_pcie[] = { + * Power Management Capability + */ + +-/* read Power Management Control/Status register */ +-static int xen_pt_pmcsr_reg_read(XenPCIPassthroughState *s, XenPTReg *cfg_entry, +- uint16_t *value, uint16_t valid_mask) +-{ +- XenPTRegInfo *reg = cfg_entry->reg; +- uint16_t valid_emu_mask = reg->emu_mask; +- +- valid_emu_mask |= PCI_PM_CTRL_STATE_MASK | PCI_PM_CTRL_NO_SOFT_RESET; +- +- valid_emu_mask = valid_emu_mask & valid_mask; +- *value = XEN_PT_MERGE_VALUE(*value, cfg_entry->data, ~valid_emu_mask); +- +- return 0; +-} + /* write Power Management Control/Status register */ + static int xen_pt_pmcsr_reg_write(XenPCIPassthroughState *s, + XenPTReg *cfg_entry, uint16_t *val, + uint16_t dev_value, uint16_t valid_mask) + { + XenPTRegInfo *reg = cfg_entry->reg; +- uint16_t emu_mask = reg->emu_mask; + uint16_t writable_mask = 0; + uint16_t throughable_mask = 0; + +- emu_mask |= PCI_PM_CTRL_STATE_MASK | PCI_PM_CTRL_NO_SOFT_RESET; +- + /* modify emulate register */ +- writable_mask = emu_mask & ~reg->ro_mask & valid_mask; ++ writable_mask = reg->emu_mask & ~reg->ro_mask & valid_mask; + cfg_entry->data = XEN_PT_MERGE_VALUE(*val, cfg_entry->data, writable_mask); + + /* create value for writing to I/O device register */ +- throughable_mask = ~emu_mask & valid_mask; ++ throughable_mask = ~reg->emu_mask & valid_mask; + *val = XEN_PT_MERGE_VALUE(*val, dev_value, throughable_mask); + + return 0; +@@ -1000,9 +983,9 @@ static XenPTRegInfo xen_pt_emu_reg_pm[] = { + .size = 2, + .init_val = 0x0008, + .ro_mask = 0xE1FC, +- .emu_mask = 0x8100, ++ .emu_mask = 0x810B, + .init = xen_pt_common_reg_init, +- .u.w.read = xen_pt_pmcsr_reg_read, ++ .u.w.read = xen_pt_word_reg_read, + .u.w.write = xen_pt_pmcsr_reg_write, + }, + { +-- +2.2.1 + |