[B! QEMU] notaeã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

notae id:notae

QEMUã«é–¢ã™ã‚‹notaeã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (4)

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QEMUã«ä»®æƒ³PCIãƒ‡ãƒã‚¤ã‚¹ã‚’è¿½åŠ ã™ã‚‹(2) : å‰æçŸ¥è˜ (PCI / ãƒ‡ãƒã‚¤ã‚¹ãƒ‰ãƒ©ã‚¤ãƒ) - Qiita
PCIãƒ‡ãƒã‚¤ã‚¹ã«ã¤ã„ã¦ å„PCIãƒ‡ãƒã‚¤ã‚¹ã¯PCIã‚³ãƒ³ãƒ•ã‚£ã‚®ãƒ¥ãƒ¬ãƒ¼ã‚·ãƒ§ãƒ³ç©ºé–“ã‚’æŒã£ã¦ã„ã¾ã™ã€‚ãã“ã«ã¯ ãƒ‡ãƒã‚¤ã‚¹IDã‚„ã©ã®ç¨‹åº¦I/Oãƒãƒ¼ãƒˆãŒã„ã‚‹ã‹ã€å‰²ã‚Šè¾¼ã¿ãŒå¿…è¦ã§ã‚ã‚‹ã‹ãªã©ã¨ã„ã£ãŸ æƒ…å ±ãŒæ›¸ã‹ã‚ŒãŸãƒ¬ã‚¸ã‚¹ã‚¿ãŒã‚ã‚Šã¾ã™ã€‚ å¿…è¦ãŒã‚ã‚Œã°BIOSã‚„ãƒ‰ãƒ©ã‚¤ãƒãªã©ãŒãã®ãƒ¬ã‚¸ã‚¹ã‚¿å€¤ã‚’èªã¿å–ã£ãŸã‚Šã€å€¤ã‚’æ›´æ–°ã—ã¾ã™ã€‚ PCIã‚³ãƒ³ãƒ•ã‚£ã‚®ãƒ¥ãƒ¬ãƒ¼ã‚·ãƒ§ãƒ³ç©ºé–“ã«ã¤ã„ã¦ã¯ Wikipedia (http://en.wikipedia.org/wiki/PCI_configuration_space) ç‰ã‚’å‚è€ƒã«ã—ã¦ãã ã•ã„ã€‚ PCIãƒ‡ãƒã‚¤ã‚¹ã¯ãƒã‚¹ç•ªå·ã€ãƒ‡ãƒã‚¤ã‚¹ç•ªå·ã«ã‚ˆã‚ŠOSã‹ã‚‰ä¸€æ„ã«èªè˜ã•ã‚Œã¾ã™ (ãƒ‡ãƒã‚¤ã‚¹ã«è¤‡æ•°ã®æ©Ÿèƒ½ãŒã‚ã‚‹å ´åˆã¯ãƒ•ã‚¡ãƒ³ã‚¯ã‚·ãƒ§ãƒ³ç•ªå·ãŒã‚ã‚Šã¾ã™)ã€‚ èªè˜ã•ã‚Œã¦ã„ã‚‹ãƒ‡ãƒã‚¤ã‚¹ã¯lspciã‚³ãƒžãƒ³ãƒ‰ã§ç¢ºèªã§ãã¾ã™ã€‚PCIãƒ‡ãƒã‚¤ã‚¹ã®æŽ¢ç´¢ã¯ BIOSã‹LinuxãŒèµ·å‹•æ™‚ã«è‡ªå‹•ã§è¡Œã£ã¦ãã‚Œã¾ã™ (ä¾‹ãˆã°PCã«ãŠã„ã¦ã¯I/
notae 2017/07/18
Virtualization

QEMU

Linux
ãƒªãƒ³ã‚¯
QEMUã®ãªã‹ã¿(QEMU internals) part1 - ã‚‹ãã™ã®æ—¥è¨˜ ~ Out_Of_Range ~
ã“ã“ä¸€ãƒ¶æœˆã»ã©QEMUã®ã‚³ãƒ¼ãƒ‰ã¨ãŠæˆ¯ã‚Œã—ã¦ã„ãŸã®ã§ã™ãŒã€ qemuã®ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã‚‚ã†ã™ãèªã¿ãã‚Šãã†ãªã®ã§ã©ã“ã‹ã«ã¾ã¨ã‚ãŸã„ã‚“ã ã‘ã©ã€qemu internalã¿ãŸã„ãªè¨˜äº‹ã£ã¦ã©ã‚Œãã‚‰ã„éœ€è¦ã‚ã‚‹ã®â€” å‰ä»£æœªèž (@RKX1209) 2015, 11æœˆ 9 ã¨è¨€ã£ã¦ã¿ãŸæ‰€ãªã‚“ã¨ãªãéœ€è¦ãŒã‚ã‚Šãã†ã ã£ãŸã®ã§æ›¸ãã¾ã—ãŸã€‚ æœ¬è¨˜äº‹ã§ã¯QEMUã®å†…éƒ¨å®Ÿè£…ã‚’è¿½ã„ã€å…·ä½“çš„ãªä»•çµ„ã¿ã‚’è¦‹ã¦ã„ãã¾ã™ã€‚ã‚‚ã—ç ”ç©¶ã‚„ä»•äº‹ãªã©ã§qemuã‚’èªã‚€å¿…è¦ãŒã‚ã‚‹æ–¹ã‚„ã€ã“ã‚Œã‹ã‚‰è¶£å‘³ã§èªã‚“ã§ã¿ã‚ˆã†ã¨ã„ã†æ–¹ã¯ãœã²å‚è€ƒã«ã—ã¦ãã ã•ã„ã€‚ (QEMU internalsã¨ã„ã†ã‚ˆã‚Šã¯QEMUã‚³ãƒ¼ãƒ‰ãƒªãƒ¼ãƒ‡ã‚£ãƒ³ã‚°ã®æ–¹ãŒé©åˆ‡ã‹ã‚‚ã—ã‚Œã¾ã›ã‚“ã....) ã•ã¦ã“ã“ã§æ‰±ã†QEMUã¯qemu2.4.0ã§ã‚²ã‚¹ãƒˆã¯x86,ãƒ›ã‚¹ãƒˆã¯x64ã§ã‚ã‚‹ã¨ä»®å®šã—ã¾ã™ã€‚ ä¸¡æ–¹å…±x86ç³»ã¨ãªã‚‹ã¨DBTã®æ„å‘³ã¯ã‚ã¾ã‚Šç„¡ãã€KVMä½¿ã£ã¦ã©ã†ãžã¨ã„ã†è©±ã«ãªã‚‹ã®ã§ã™ãŒã€ã‚ãã¾ã§ã‚³ãƒ¼
notae 2015/11/16
QEMU
ãƒªãƒ³ã‚¯
VENOM(CVE-2015-3456) å½±éŸ¿ç¯„å›²ãƒ¡ãƒ¢ - ã‚ã‚‚ãŠãã°
Xen, KVMç‰ã®ã€ä»®æƒ³åŒ–ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ã¨ã—ã¦QEMUã‚’åˆ©ç”¨ã—ã¦ã„ã‚‹ç’°å¢ƒã§ç™ºç”Ÿ VMware,Bochsã¯å¯¾è±¡å¤– Hyper-Vã‚‚Xenã¨ä»®æƒ³åŒ–ã‚³ã‚¢ã¯åŒã˜ã ãŒä»®æƒ³åŒ–ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ãŒé•ã†ã®ã§å¯¾è±¡å¤– Xenåˆ©ç”¨ã®AWSã¯å¯¾è±¡å¤–ã€‚è‡ªå‰ã§FDCã‚’å¤–ã—ã¦ã„ã‚‹ï¼Ÿ*1 ãŠãã‚‰ãVirtualBoxã‚‚å¯¾è±¡ï¼Ÿ FDãƒ‰ãƒ©ã‚¤ãƒ–ã‚’æŽ¥ç¶šã—ã¦ã„ãªãã¦ã‚‚ã€QEMUã®ä»®æƒ³åŒ–ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢(ICH9)ãŒFDã‚³ãƒ³ãƒˆãƒãƒ¼ãƒ©ã‚’ç©ã‚“ã§ã„ã‚‹ã®ã§å¯¾è±¡ã¨ãªã‚‹ã€‚ This issue affects all x86 and x86-64 based HVM Xen and QEMU/KVM guests, regardless of their machine type, because both PIIX and ICH9 based QEMU machine types create ISA bridge (ICH9 via LPC) a
notae 2015/05/14
VMæ§‹æˆã«FDDãŒãªãã¦ã‚‚FDCãŒè‡ªå‹•ã§æŽ¥ç¶šã•ã‚Œã‚‹ã®ã§å¯¾è±¡

Security

Xen

QEMU

KVM
ãƒªãƒ³ã‚¯
VENOM: QEMU vulnerability (CVE-2015-3456) - Red Hat Customer Portal
Red Hat Product Security has been made aware of a 'buffer overflow' vulnerability affecting the Floppy Disk Controller (FDC) emulation implemented in the QEMU component of the KVM/QEMU and Xen hypervisors. The vulnerability, which has been assigned CVE-2015-3456 and is now being referred to as VENOM, was discovered by Jason Geffner of CrowdStrike, Inc. The vulnerability was rated as having an Impo
notae 2015/05/14
Security

Xen

KVM

QEMU
ãƒªãƒ³ã‚¯
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