Re: [libvirt] [PATCH] qemu: avoid pass null pointer as an argument

We definitely have a bug here, but this is not the right fix. The bug is that the cleanup: label is trying to read from logfd if the vm crashed, without having opened logfd in the qemuProcessAttach case. I think the more appropriate patch is this: diff --git i/src/qemu/qemu_process.c w/src/qemu/qemu_process.c index 8508ff6..1eea45f 100644 --- i/src/qemu/qemu_process.c +++ w/src/qemu/qemu_process.c @@ -1214,7 +1214,7 @@ qemuProcessWaitForMonitor(struct qemud_driver* driver, cleanup: virHashFree(paths); - if (kill(vm->pid, 0) == -1 && errno == ESRCH) { + if (pos != -1 && kill(vm->pid, 0) == -1 && errno == ESRCH) { /* VM is dead, any other error raised in the interim is probably * not as important as the qemu cmdline output */ qemuProcessReadLogFD(logfd, buf, buf_size, strlen(buf));