diff options
author | Andy Honig <ahonig@google.com> | 2013-02-20 14:49:16 -0800 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-04-25 21:19:55 -0700 |
commit | f56d137aa68f8edadac247aa48b335f2776954ff (patch) | |
tree | 7972505b31b9bcdd778e652ad5632167cd22998d /arch/arm/mach-s3c24xx/common-smdk.c | |
parent | f6dfc740c1d8f6133d2f53c1074770c13d040364 (diff) |
KVM: Fix bounds checking in ioapic indirect register reads (CVE-2013-1798)
commit a2c118bfab8bc6b8bb213abfc35201e441693d55 upstream.
If the guest specifies a IOAPIC_REG_SELECT with an invalid value and follows
that with a read of the IOAPIC_REG_WINDOW KVM does not properly validate
that request. ioapic_read_indirect contains an
ASSERT(redir_index < IOAPIC_NUM_PINS), but the ASSERT has no effect in
non-debug builds. In recent kernels this allows a guest to cause a kernel
oops by reading invalid memory. In older kernels (pre-3.3) this allows a
guest to read from large ranges of host memory.
Tested: tested against apic unit tests.
Signed-off-by: Andrew Honig <ahonig@google.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/arm/mach-s3c24xx/common-smdk.c')
0 files changed, 0 insertions, 0 deletions