From: Philippe Mathieu-Daudé <f4bug@xxxxxxxxx> Fix vCPU hot-unplug related leak reported by Valgrind: ==132362== 4,096 bytes in 1 blocks are definitely lost in loss record 8,440 of 8,549 ==132362== at 0x4C3B15F: memalign (vg_replace_malloc.c:1265) ==132362== by 0x4C3B288: posix_memalign (vg_replace_malloc.c:1429) ==132362== by 0xB41195: qemu_try_memalign (memalign.c:53) ==132362== by 0xB41204: qemu_memalign (memalign.c:73) ==132362== by 0x7131CB: kvm_init_xsave (kvm.c:1601) ==132362== by 0x7148ED: kvm_arch_init_vcpu (kvm.c:2031) ==132362== by 0x91D224: kvm_init_vcpu (kvm-all.c:516) ==132362== by 0x9242C9: kvm_vcpu_thread_fn (kvm-accel-ops.c:40) ==132362== by 0xB2EB26: qemu_thread_start (qemu-thread-posix.c:556) ==132362== by 0x7EB2159: start_thread (in /usr/lib64/libpthread-2.28.so) ==132362== by 0x9D45DD2: clone (in /usr/lib64/libc-2.28.so) Reported-by: Mark Kanda <mark.kanda@xxxxxxxxxx> Signed-off-by: Philippe Mathieu-Daudé <f4bug@xxxxxxxxx> --- Based on a series from Mark: https://lore.kernel.org/qemu-devel/20220321141409.3112932-1-mark.kanda@xxxxxxxxxx/ RFC because currently no time to test --- target/i386/kvm/kvm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index ef2c68a6f4..e93440e774 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -2072,6 +2072,8 @@ int kvm_arch_destroy_vcpu(CPUState *cs) X86CPU *cpu = X86_CPU(cs); CPUX86State *env = &cpu->env; + g_free(env->xsave_buf); + if (cpu->kvm_msr_buf) { g_free(cpu->kvm_msr_buf); cpu->kvm_msr_buf = NULL; -- 2.35.1
