search for: xenmem_populate_physmap

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Xen Security Advisory CVE-2012-3496 / XSA-14 version 3 XENMEM_populate_physmap DoS vulnerability UPDATES IN VERSION 3 ==================== Public release. Credit Matthew Daley. ISSUE DESCRIPTION ================= XENMEM_populate_physmap can be called with invalid flags. By calling it with MEMF_populate_on_demand flag set, a BUG can be triggered if a translating paging m...

hi I try to understand the code of balloon ,and got confused about the following parts of code: static int decrease_reservation(unsigned long nr_pages) { .... if (!PageHighMem(page)) { v = phys_to_virt(pfn << PAGE_SHIFT); scrub_pages(v, 1); ret = HYPERVISOR_update_va_mapping( (unsigned long)v, __pte_ma(0), 0);

...In general it could be generic however I do not know it will be useful for others. If this function would be accepted by mm/memory_hotplug.c maintainers we could move it there. I removed from original add_memory funtion resource allocation (and deallocation after error), which must be done before XENMEM_populate_physmap in Xen. xen_add_memory is called after physmap is fully populated. If you have a questions please drop me a line. Daniel Signed-off-by: Daniel Kiper <dkiper@net-space.pl> --- arch/x86/Kconfig | 2 +- drivers/base/memory.c | 23 --- drivers/xen/Kconfig...

...t;, + (Addr)&arg->domid, sizeof(arg->domid)); + PRE_MEM_READ("XENMEM_set_memory_map", + (Addr)&arg->map, sizeof(arg->map)); + break; + } + case XENMEM_increase_reservation: + case XENMEM_decrease_reservation: + case XENMEM_populate_physmap: { + struct xen_memory_reservation *memory_reservation = + (struct xen_memory_reservation *)(unsigned int)ARG2; + char *which; + + switch (ARG1) { + case XENMEM_increase_reservation: + which = "XENMEM_increase_reservation"; + break; + case...

...pository: http://xenbits.xen.org/xen-4.1-testing.hg (tag RELEASE-4.1.4) This fixes the following critical vulnerabilities: * CVE-2012-3494 / XSA-12: hypercall set_debugreg vulnerability * CVE-2012-3495 / XSA-13: hypercall physdev_get_free_pirq vulnerability * CVE-2012-3496 / XSA-14: XENMEM_populate_physmap DoS vulnerability * CVE-2012-3498 / XSA-16: PHYSDEVOP_map_pirq index vulnerability * CVE-2012-3515 / XSA-17: Qemu VT100 emulation vulnerability * CVE-2012-4411 / XSA-19: guest administrator can access qemu monitor console * CVE-2012-4535 / XSA-20: Timer overflow DoS vulnerabilit...

Last year we had a discussion[1] about how the hypercall ABI unfortunately contains fields that change width between 32- and 64-bit builds. This is a huge problem as we come up on the python management stack for ppc64, since the distributions ship 32-bit python. A 32-bit python/libxc cannot currently manage a 64-bit hypervisor. I had a patch but was unable to test it, and some other things were

...;start; } + spin_lock_irqsave(&balloon_lock, flags); + pfn = PFN_DOWN(balloon_stats.hotplug_start_paddr + balloon_stats.hotplug_size); for (i = 0; i < nr_pages; ++i, ++pfn) @@ -310,7 +258,7 @@ static int allocate_additional_memory(unsigned long nr_pages) rc = HYPERVISOR_memory_op(XENMEM_populate_physmap, &reservation); if (rc < 0) - goto out; + goto out_1; pfn = PFN_DOWN(balloon_stats.hotplug_start_paddr + balloon_stats.hotplug_size); @@ -323,9 +271,10 @@ static int allocate_additional_memory(unsigned long nr_pages) balloon_stats.hotplug_size += rc << PAGE_SHIFT; ballo...

Hey, I just started noticing it today - with qemu-xen (tip is commit b97307ecaad98360f41ea36cd9674ef810c4f8cf xen_disk: mark ioreq as mapped before unmapping in error case) when I try to pass in a PCI device at bootup it blows up with: char device redirected to /dev/pts/2 (label serial0) qemu: hardware error: xen: failed to populate ram at 40050000 CPU #0: EAX=00000000 EBX=00000000

Hi Jeremy. Here are the 3 patches for ia64/xen support. The first one is just to move manage.c under drivers/xen. This is trivial. The second and third ones are for compilation fix on ia64. You may want to postpone those 2 patches to make your merge task easy as you said before. thanks, Diffstat arch/x86/xen/Makefile | 2 +- drivers/xen/Makefile | 2 +-

Hi Jeremy. Here are the 3 patches for ia64/xen support. The first one is just to move manage.c under drivers/xen. This is trivial. The second and third ones are for compilation fix on ia64. You may want to postpone those 2 patches to make your merge task easy as you said before. thanks, Diffstat arch/x86/xen/Makefile | 2 +- drivers/xen/Makefile | 2 +-

We have implemented hugepage support for guests in following manner In our implementation we added a parameter hugepage_num which is specified in the config file of the DomU. It is the number of hugepages that the guest is guaranteed to receive whenever the kernel asks for hugepage by using its boot time parameter or reserving after booting (eg. Using echo XX > /proc/sys/vm/nr_hugepages).

Hi. This patchset implements ia64/xen domU support based on ia64/pv_ops frame work which was sent as another patchest. Changes from take 5 are rebased to Linux 2.6.26-rc3, bug fix ivt.S paravirtualization and multi entry point support. I believe these patches can be applied to the linux ia64 repository. This patchset does the followings. - Some preparation work. Mainly importing header files to

Hi. This patchset implements ia64/xen domU support based on ia64/pv_ops frame work which was sent as another patchest. Changes from take 5 are rebased to Linux 2.6.26-rc3, bug fix ivt.S paravirtualization and multi entry point support. I believe these patches can be applied to the linux ia64 repository. This patchset does the followings. - Some preparation work. Mainly importing header files to

Hi. This patchset implements ia64/xen domU support based on ia64/pv_ops frame work which was sent as another patchest. This patchset does the followings. - Some preparation work. Mainly importing header files to define related structures. - Then, define functions related to hypercall which is the way to communicate with Xen hypervisor. - Add some helper functions which is necessary to

Hi. This patchset implements ia64/xen domU support based on ia64/pv_ops frame work which was sent as another patchest. This patchset does the followings. - Some preparation work. Mainly importing header files to define related structures. - Then, define functions related to hypercall which is the way to communicate with Xen hypervisor. - Add some helper functions which is necessary to

Hi. This patchset implements ia64/xen domU support based on ia64/pv_ops frame work which was sent as another patchest. Please review and comments. This patchset does the followings. - Some preparation work. Mainly importing header files to define related structures. - Then, define functions related to hypercall which is the way to communicate with Xen hypervisor. - Add some helper functions

Hi. This patchset implements ia64/xen domU support based on ia64/pv_ops frame work which was sent as another patchest. Please review and comments. This patchset does the followings. - Some preparation work. Mainly importing header files to define related structures. - Then, define functions related to hypercall which is the way to communicate with Xen hypervisor. - Add some helper functions

Hi. This patchset implements ia64/xen domU support based on ia64/pv_ops frame work which was already merged to linux ia64 test branch. This patch is for linux ia64 test branch. This patchset does the followings. - Some preparation work. Mainly importing header files to define related structures. - Then, define functions related to hypercall which is the way to communicate with Xen hypervisor.

Hi. This patchset implements ia64/xen domU support based on ia64/pv_ops frame work which was already merged to linux ia64 test branch. This patch is for linux ia64 test branch. This patchset does the followings. - Some preparation work. Mainly importing header files to define related structures. - Then, define functions related to hypercall which is the way to communicate with Xen hypervisor.

Hi. This patchset is ia64/xen domU patch take 8 which was updated following Tony's review. (Thank you very much, Tony.) This patchset implements ia64/xen domU support based on ia64/pv_ops frame work which was sent as another patchest. This patchset is for linux ia64 test branch and depends on some patches for xen common part I'll send separately. To compile, the changesets in x86/xen