* arch/s390/kvm/s390/interrupt.c:1282 kvm_s390_handle_wait() warn: shift has higher precedence than mask 'gisa_get_ipm_or_restore_iam(gi)' & 'vcpu->arch.sie_block->gcr[6] >> 24'
@ 2026-09-08 23:07 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-09-08 23:07 UTC (permalink / raw)
To: oe-kbuild; +Cc: lkp, Dan Carpenter
BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: Steffen Eiden <seiden@linux.ibm.com>
CC: Christian Borntraeger <borntraeger@linux.ibm.com>
Hi Steffen,
FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 893e11787f78e43b534e252249ac3fff4d1333f8
commit: 1b09c13c90ccd908e62f82b309fade358b41cd21 KVM: s390: Move s390 kvm code into a subdirectory
date: 4 weeks ago
:::::: branch date: 3 hours ago
:::::: commit date: 4 weeks ago
config: s390-randconfig-r073-20260909 (https://download.01.org/0day-ci/archive/20260909/202609090603.I4ZYaeel-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 14.3.0
smatch: v0.5.0-9187-g5189e3fb
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Fixes: 1b09c13c90cc ("KVM: s390: Move s390 kvm code into a subdirectory")
| Reported-by: kernel test robot <lkp@intel.com>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Closes: https://lore.kernel.org/r/202609090603.I4ZYaeel-lkp@intel.com/
smatch warnings:
arch/s390/kvm/s390/interrupt.c:1282 kvm_s390_handle_wait() warn: shift has higher precedence than mask 'gisa_get_ipm_or_restore_iam(gi)' & 'vcpu->arch.sie_block->gcr[6] >> 24'
arch/s390/kvm/s390/interrupt.c:1679 get_io_int() error: buffer overflow 'fi->lists' 10 <= s32max
arch/s390/kvm/s390/../../../../virt/kvm/kvm_main.c:1708 kvm_commit_memory_region() error: we previously assumed 'old' could be null (see line 1701)
arch/s390/kvm/s390/../../../../virt/kvm/kvm_main.c:1710 kvm_commit_memory_region() error: we previously assumed 'new' could be null (see line 1702)
vim +1282 arch/s390/kvm/s390/interrupt.c
b3c17f10fa2cfc arch/s390/kvm/interrupt.c David Hildenbrand 2016-02-22 1264
ba5c1e9b6ceebd arch/s390/kvm/interrupt.c Carsten Otte 2008-03-25 1265 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
ba5c1e9b6ceebd arch/s390/kvm/interrupt.c Carsten Otte 2008-03-25 1266 {
9f30f62163786a arch/s390/kvm/interrupt.c Michael Mueller 2019-01-31 1267 struct kvm_s390_gisa_interrupt *gi = &vcpu->kvm->arch.gisa_int;
b3c17f10fa2cfc arch/s390/kvm/interrupt.c David Hildenbrand 2016-02-22 1268 u64 sltime;
ba5c1e9b6ceebd arch/s390/kvm/interrupt.c Carsten Otte 2008-03-25 1269
ba5c1e9b6ceebd arch/s390/kvm/interrupt.c Carsten Otte 2008-03-25 1270 vcpu->stat.exit_wait_state++;
ba5c1e9b6ceebd arch/s390/kvm/interrupt.c Carsten Otte 2008-03-25 1271
0759d0681cae27 arch/s390/kvm/interrupt.c David Hildenbrand 2014-05-13 1272 /* fast path */
118b862b153190 arch/s390/kvm/interrupt.c David Hildenbrand 2015-09-23 1273 if (kvm_arch_vcpu_runnable(vcpu))
0759d0681cae27 arch/s390/kvm/interrupt.c David Hildenbrand 2014-05-13 1274 return 0;
e52b2af541bcb2 arch/s390/kvm/interrupt.c Carsten Otte 2008-05-21 1275
ba5c1e9b6ceebd arch/s390/kvm/interrupt.c Carsten Otte 2008-03-25 1276 if (psw_interrupts_disabled(vcpu)) {
ba5c1e9b6ceebd arch/s390/kvm/interrupt.c Carsten Otte 2008-03-25 1277 VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
b8e660b83d5051 arch/s390/kvm/interrupt.c Heiko Carstens 2010-02-26 1278 return -EOPNOTSUPP; /* disabled wait */
ba5c1e9b6ceebd arch/s390/kvm/interrupt.c Carsten Otte 2008-03-25 1279 }
ba5c1e9b6ceebd arch/s390/kvm/interrupt.c Carsten Otte 2008-03-25 1280
9f30f62163786a arch/s390/kvm/interrupt.c Michael Mueller 2019-01-31 1281 if (gi->origin &&
9f30f62163786a arch/s390/kvm/interrupt.c Michael Mueller 2019-01-31 @1282 (gisa_get_ipm_or_restore_iam(gi) &
9f30f62163786a arch/s390/kvm/interrupt.c Michael Mueller 2019-01-31 1283 vcpu->arch.sie_block->gcr[6] >> 24))
9f30f62163786a arch/s390/kvm/interrupt.c Michael Mueller 2019-01-31 1284 return 0;
9f30f62163786a arch/s390/kvm/interrupt.c Michael Mueller 2019-01-31 1285
b3c17f10fa2cfc arch/s390/kvm/interrupt.c David Hildenbrand 2016-02-22 1286 if (!ckc_interrupts_enabled(vcpu) &&
b3c17f10fa2cfc arch/s390/kvm/interrupt.c David Hildenbrand 2016-02-22 1287 !cpu_timer_interrupts_enabled(vcpu)) {
ba5c1e9b6ceebd arch/s390/kvm/interrupt.c Carsten Otte 2008-03-25 1288 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
bda343ef149bc0 arch/s390/kvm/interrupt.c David Hildenbrand 2014-12-12 1289 __set_cpu_idle(vcpu);
ba5c1e9b6ceebd arch/s390/kvm/interrupt.c Carsten Otte 2008-03-25 1290 goto no_timer;
ba5c1e9b6ceebd arch/s390/kvm/interrupt.c Carsten Otte 2008-03-25 1291 }
ba5c1e9b6ceebd arch/s390/kvm/interrupt.c Carsten Otte 2008-03-25 1292
b3c17f10fa2cfc arch/s390/kvm/interrupt.c David Hildenbrand 2016-02-22 1293 sltime = __calculate_sltime(vcpu);
b3c17f10fa2cfc arch/s390/kvm/interrupt.c David Hildenbrand 2016-02-22 1294 if (!sltime)
bda343ef149bc0 arch/s390/kvm/interrupt.c David Hildenbrand 2014-12-12 1295 return 0;
bda343ef149bc0 arch/s390/kvm/interrupt.c David Hildenbrand 2014-12-12 1296
bda343ef149bc0 arch/s390/kvm/interrupt.c David Hildenbrand 2014-12-12 1297 __set_cpu_idle(vcpu);
8b0e195314fabd arch/s390/kvm/interrupt.c Thomas Gleixner 2016-12-25 1298 hrtimer_start(&vcpu->arch.ckc_timer, sltime, HRTIMER_MODE_REL);
b3c17f10fa2cfc arch/s390/kvm/interrupt.c David Hildenbrand 2016-02-22 1299 VCPU_EVENT(vcpu, 4, "enabled wait: %llu ns", sltime);
ba5c1e9b6ceebd arch/s390/kvm/interrupt.c Carsten Otte 2008-03-25 1300 no_timer:
2031f2876896d8 arch/s390/kvm/interrupt.c Sean Christopherson 2022-04-15 1301 kvm_vcpu_srcu_read_unlock(vcpu);
352ccf890a3e91 arch/s390/kvm/interrupt.c Christian Borntraeger 2025-09-04 1302 vcpu->kvm->arch.float_int.last_sleep_cpu = vcpu->vcpu_idx;
91b99ea7065786 arch/s390/kvm/interrupt.c Sean Christopherson 2021-10-08 1303 kvm_vcpu_halt(vcpu);
75c89e5272fba7 arch/s390/kvm/interrupt.c Sean Christopherson 2021-10-08 1304 vcpu->valid_wakeup = false;
ba5c1e9b6ceebd arch/s390/kvm/interrupt.c Carsten Otte 2008-03-25 1305 __unset_cpu_idle(vcpu);
2031f2876896d8 arch/s390/kvm/interrupt.c Sean Christopherson 2022-04-15 1306 kvm_vcpu_srcu_read_lock(vcpu);
800c1065c3207a arch/s390/kvm/interrupt.c Thomas Huth 2013-09-12 1307
2d00f759427bb3 arch/s390/kvm/interrupt.c David Hildenbrand 2014-12-11 1308 hrtimer_cancel(&vcpu->arch.ckc_timer);
ba5c1e9b6ceebd arch/s390/kvm/interrupt.c Carsten Otte 2008-03-25 1309 return 0;
ba5c1e9b6ceebd arch/s390/kvm/interrupt.c Carsten Otte 2008-03-25 1310 }
ba5c1e9b6ceebd arch/s390/kvm/interrupt.c Carsten Otte 2008-03-25 1311
:::::: The code at line 1282 was first introduced by commit
:::::: 9f30f62163786a0b80e0886046b5c66e714e7e71 KVM: s390: add gib_alert_irq_handler()
:::::: TO: Michael Mueller <mimu@linux.ibm.com>
:::::: CC: Christian Borntraeger <borntraeger@de.ibm.com>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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2026-09-08 23:07 arch/s390/kvm/s390/interrupt.c:1282 kvm_s390_handle_wait() warn: shift has higher precedence than mask 'gisa_get_ipm_or_restore_iam(gi)' & 'vcpu->arch.sie_block->gcr[6] >> 24' kernel test robot
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