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KVM: s390: Replace sprintf with snprintf for buffer safety

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Replace sprintf() with snprintf() when formatting debug names to prevent
potential buffer overflow. The debug_name buffer is 16 bytes, and while
unlikely to overflow with current PIDs, using snprintf() provides proper
bounds checking.

Signed-off-by: Josephine Pfeiffer <hi@josie.lol>
[frankja@linux.ibm.com: Fixed subject prefix]
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
This commit is contained in:
Josephine Pfeiffer
2025-10-01 19:40:46 +02:00
committed by Janosch Frank
parent 7d5136ed1b
commit f5a6fa189a
1 changed files with 1 additions and 1 deletions
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2
arch/s390/kvm/kvm-s390.c
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@@ -3348,7 +3348,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
if (!kvm->arch.sca)
goto out_err;
sprintf(debug_name, "kvm-%u", current->pid);
snprintf(debug_name, sizeof(debug_name), "kvm-%u", current->pid);
kvm->arch.dbf = debug_register(debug_name, 32, 1, 7 * sizeof(long));
if (!kvm->arch.dbf)