Andy Lutomirski 86462c4a7b x86/xen: Probe target addresses in set_aliased_prot() before the hypercall ... commit aa1acff356bbedfd03b544051f5b371746735d89 upstream. The update_va_mapping hypercall can fail if the VA isn't present in the guest's page tables. Under certain loads, this can result in an OOPS when the target address is in unpopulated vmap space. While we're at it, add comments to help explain what's going on. This isn't a great long-term fix. This code should probably be changed to use something like set_memory_ro. Signed-off-by: Andy Lutomirski <luto@kernel.org> Cc: Andrew Cooper <andrew.cooper3@citrix.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: David Vrabel <dvrabel@cantab.net> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jan Beulich <jbeulich@suse.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sasha Levin <sasha.levin@oracle.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: security@kernel.org <security@kernel.org> Cc: xen-devel <xen-devel@lists.xen.org> Link: http://lkml.kernel.org/r/0b0e55b995cda11e7829f140b833ef932fcabe3a.1438291540.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Zefan Li <lizefan@huawei.com>		2016-03-21 09:17:49 +08:00
..
boot	x86, build: Pass in additional -mno-mmx, -mno-sse options	2014-06-07 16:02:08 -07:00
configs
crypto	crypto: aesni - fix memory usage in GCM decryption	2015-06-19 11:40:28 +08:00
ia32
include/asm	KVM: x86: make vapics_in_nmi_mode atomic	2015-10-22 09:20:07 +08:00
kernel	x86, kvm: fix kvm's usage of kernel_fpu_begin/end()	2015-09-18 09:20:46 +08:00
kvm	KVM: x86: properly restore LVT0	2015-10-22 09:20:07 +08:00
lguest
lib
math-emu
mm	x86, mm/ASLR: Fix stack randomization on 64-bit systems	2015-04-14 17:33:58 +08:00
net	x86: bpf_jit: fix compilation of large bpf programs	2015-09-18 09:20:42 +08:00
oprofile
pci	x86/PCI: Use host bridge _CRS info on Foxconn K8M890-8237A	2015-10-22 09:20:03 +08:00
platform	x86/efi: Fix dummy variable buffer allocation	2014-06-07 16:02:10 -07:00
power
syscalls	x86, x32: Use compat shims for io_{setup,submit}	2014-06-30 20:01:33 -07:00
tools
um	x86, um: actually mark system call tables readonly	2015-04-14 17:33:49 +08:00
vdso	x86/vdso: Fix the build on GCC5	2015-06-19 11:40:25 +08:00
video
xen	x86/xen: Probe target addresses in set_aliased_prot() before the hypercall	2016-03-21 09:17:49 +08:00
.gitignore
Kbuild
Kconfig	config: Enable NEED_DMA_MAP_STATE by default when SWIOTLB is selected	2015-06-19 11:40:34 +08:00
Kconfig.cpu
Kconfig.debug
Makefile
Makefile.um
Makefile_32.cpu