AuxXxilium/linux_dsm_epyc7002
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e1e8a9624f
linux_dsm_epyc7002/arch/s390/kvm
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Janosch Frank e1e8a9624f KVM: s390: Disable dirty log retrieval for UCONTROL guests 
User controlled KVM guests do not support the dirty log, as they have
no single gmap that we can check for changes.

As they have no single gmap, kvm->arch.gmap is NULL and all further
referencing to it for dirty checking will result in a NULL
dereference.

Let's return -EINVAL if a caller tries to sync dirty logs for a
UCONTROL guest.

Fixes: 15f36eb ("KVM: s390: Add proper dirty bitmap support to S390 kvm.")
Cc: <stable@vger.kernel.org> # 3.16+

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Reported-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2017-02-06 11:20:12 +01:00
..
diag.c KVM: s390: provide logging for diagnose 0x500 2016-06-10 12:07:26 +02:00
gaccess.c KVM: s390: Get rid of ar_t 2017-01-30 11:17:29 +01:00
gaccess.h KVM: s390: prepare to read random guest instructions 2017-01-30 11:19:16 +01:00
guestdbg.c KVM: s390: guestdbg: filter PER i-fetch on EXECUTE properly 2017-01-30 11:19:17 +01:00
intercept.c KVM: s390: guestdbg: filter PER i-fetch on EXECUTE properly 2017-01-30 11:19:17 +01:00
interrupt.c ktime: Cleanup ktime_set() usage 2016-12-25 17:21:22 +01:00
irq.h KVM: s390: irq routing for adapter interrupts. 2014-03-21 13:43:00 +01:00
Kconfig KVM: halt_polling: provide a way to qualify wakeups during poll 2016-05-13 17:29:23 +02:00
kvm-s390.c KVM: s390: Disable dirty log retrieval for UCONTROL guests 2017-02-06 11:20:12 +01:00
kvm-s390.h KVM: s390: guestdbg: filter PER i-fetch on EXECUTE properly 2017-01-30 11:19:17 +01:00
Makefile KVM: s390: vsie: initial support for nested virtualization 2016-06-21 09:43:33 +02:00
priv.c KVM: s390: Get rid of ar_t 2017-01-30 11:17:29 +01:00
sigp.c KVM: s390: don't use CPUSTAT_WAIT to detect if a VCPU is idle 2016-06-21 09:43:45 +02:00
sthyi.c KVM: s390: Fix STHYI buffer alignment for diag224 2016-10-26 13:46:44 +02:00
trace-s390.h KVM: s390: obey kptr_restrict in traces 2015-12-15 17:06:32 +01:00
trace.h KVM: s390: trace and count all skey intercepts 2016-06-10 12:07:31 +02:00
vsie.c KVM: s390: instruction-execution-protection support 2017-01-30 11:17:28 +01:00