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linux/arch/s390
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Christian Borntraeger dc7e0192c4 KVM: s390/diag: fix racy access of physical cpu number in diag 9c handler 
[ Upstream commit 0bc380beb7 ]

We do check for target CPU == -1, but this might change at the time we
are going to use it. Hold the physical target CPU in a local variable to
avoid out-of-bound accesses to the cpu arrays.

Cc: Pierre Morel <pmorel@linux.ibm.com>
Fixes: 87e28a15c4 ("KVM: s390: diag9c (directed yield) forwarding")
Reported-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Reviewed-by: Nico Boehr <nrb@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2023-07-19 16:36:38 +02:00
..
appldata s390: simplify dynamic sysctl registration for appldata_register_ops 2023-03-20 10:56:49 +01:00
boot s390/mm: fix direct map accounting 2023-04-13 17:36:28 +02:00
configs s390/iommu: get rid of S390_CCW_IOMMU and S390_AP_IOMMU 2023-05-17 15:20:18 +02:00
crypto s390/crypto: use vector instructions only if available for ChaCha20 2023-05-15 14:20:13 +02:00
hypfs s390/hypfs: remove unused info_blk_hdr__pcpus() function 2022-11-23 16:24:07 +01:00
include s390/uapi: cover statfs padding by growing f_spare 2023-05-17 15:20:17 +02:00
kernel s390 updates for 6.4-rc3 2023-05-19 11:11:04 -07:00
kvm KVM: s390/diag: fix racy access of physical cpu number in diag 9c handler 2023-07-19 16:36:38 +02:00
lib s390/lib: use SYM* macros instead of ENTRY(), etc. 2023-04-19 17:24:16 +02:00
mm s390/kasan: fix insecure W+X mapping warning 2023-07-19 16:35:07 +02:00
net bpf-next-for-netdev 2023-04-21 20:32:37 -07:00
pci Merge branch 'uaccess-inline-asm-cleanup' into features 2023-04-04 18:29:28 +02:00
purgatory s390/purgatory: disable branch profiling 2023-06-01 16:59:43 +02:00
tools KVM: s390: Add facility 197 to the allow list 2022-07-13 15:25:25 +02:00
Kbuild kbuild: use more subdir- for visiting subdirectories while cleaning 2021-10-24 13:49:46 +09:00
Kconfig s390/iommu: get rid of S390_CCW_IOMMU and S390_AP_IOMMU 2023-05-17 15:20:18 +02:00
Kconfig.debug s390/Kconfig.debug: fix indentation 2022-06-01 12:03:15 +02:00
Makefile s390: reintroduce expoline dependence to scripts 2023-03-27 17:23:08 +02:00