The patch titled
arch/s390/kvm/sigp.c: fix read buffer overflow
has been added to the -mm tree. Its filename is
arch-s390-kvm-sigpc-fix-read-buffer-overflow.patch
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See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: arch/s390/kvm/sigp.c: fix read buffer overflow
From: Roel Kluin <roel.kluin@xxxxxxxxx>
Check whether index is within bounds before testing the element.
Signed-off-by: Roel Kluin <roel.kluin@xxxxxxxxx>
Cc: Avi Kivity <avi@xxxxxxxxxx>
Cc: Christian Borntraeger <borntraeger@xxxxxxxxxx>
Cc: Carsten Otte <cotte@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/s390/kvm/sigp.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff -puN arch/s390/kvm/sigp.c~arch-s390-kvm-sigpc-fix-read-buffer-overflow arch/s390/kvm/sigp.c
--- a/arch/s390/kvm/sigp.c~arch-s390-kvm-sigpc-fix-read-buffer-overflow
+++ a/arch/s390/kvm/sigp.c
@@ -181,7 +181,7 @@ static int __sigp_set_prefix(struct kvm_
unsigned long *reg)
{
struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
- struct kvm_s390_local_interrupt *li;
+ struct kvm_s390_local_interrupt *li = NULL;
struct kvm_s390_interrupt_info *inti;
int rc;
u8 tmp;
@@ -201,9 +201,10 @@ static int __sigp_set_prefix(struct kvm_
return 2; /* busy */
spin_lock(&fi->lock);
- li = fi->local_int[cpu_addr];
+ if (cpu_addr < KVM_MAX_VCPUS)
+ li = fi->local_int[cpu_addr];
- if ((cpu_addr >= KVM_MAX_VCPUS) || (li == NULL)) {
+ if (li == NULL) {
rc = 1; /* incorrect state */
*reg &= SIGP_STAT_INCORRECT_STATE;
kfree(inti);
_
Patches currently in -mm which might be from roel.kluin@xxxxxxxxx are
linux-next.patch
x86-fix-buffer-overflow-in-efi_init.patch
s3c-fix-check-of-index-into-s3c_gpios.patch
stmp3xxx-deallocation-with-negative-index-of-descriptors.patch
dm-strncpy-does-not-null-terminate-string.patch
powerpc-sky-cpu-redundant-or-incorrect-tests-on-unsigned.patch
powerpc-fsl-booke-read-buffer-overflow.patch
media-strncpy-does-not-null-terminate-string.patch
siano-read-buffer-overflow.patch
drivers-media-video-bw-qcamc-fix-read-buffer-overflow.patch
stk-webcam-read-buffer-overflow.patch
hid-fix-read-buffer-overflow.patch
ipath-strncpy-does-not-null-terminate-string.patch
arch-s390-kvm-sigpc-fix-read-buffer-overflow.patch
mips-decrease-size-of-au1xxx_dbdma_pm_regs.patch
mips-read-buffer-overflow.patch
slram-read-buffer-overflow.patch
slram-read-buffer-overflow-cleanup.patch
mtd-fix-read-buffer-overflow.patch
irda-fix-read-buffer-overflow.patch
hfc_usb-fix-read-buffer-overflow.patch
atlx-strncpy-does-not-null-terminate-string.patch
ext4-remove-redundant-test-on-unsigned.patch
ocfs2-keep-index-within-status_map.patch
drivers-parisc-pdc_stablec-fix-read-buffer-overflow.patch
cyclades-read-buffer-overflow.patch
perf-fix-read-buffer-overflow.patch
drivers-scsi-fnic-fnic_scsic-clean-up.patch
ibmmca-buffer-overflow.patch
scsi-eata-fix-buffer-overflow.patch
drivers-scsi-gdthc-fix-buffer-overflow.patch
drivers-scsi-iprh-fix-buffer-overflow.patch
drivers-scsi-u14-34fc-fix-uffer-overflow.patch
drivers-scsi-lpfc-lpfc_vportc-fix-read-buffer-overflow.patch
osst-fix-read-buffer-overflow.patch
usb-gadget-read-buffer-overflow.patch
libertas-read-buffer-overflow.patch
i915-fix-read-outside-array-bounds.patch
frv-duplicate-output_buffer-of-e03.patch
frv-duplicate-output_buffer-of-e03-checkpatch-fixes.patch
blackfin-fix-read-buffer-overflow.patch
arch-alpha-boot-tools-objstripc-wrong-variable-tested-after-open.patch
m32r-remove-redundant-tests-on-unsigned.patch
m68k-count-can-reach-51-not-50.patch
m68k-cnt-reaches-1-not-0.patch
dme1737-keep-index-within-pwm_config.patch
ncpfs-read-buffer-overflow.patch
smbfs-read-buffer-overflow.patch
platinumfb-misplaced-parenthesis.patch
sisfb-read-buffer-overflow.patch
drivers-video-console-newport_conc-fix-read-outside-array-bounds.patch
adfs-remove-redundant-test-on-unsigned.patch
x86-read-buffer-overflow.patch
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