[PATCH] qemu_tpm: Check for qemuTPMSetupEncryption() errors

[Michal Privoznik <mprivozn@xxxxxxxxxx>]

Inside of qemuTPMEmulatorBuildCommand() there are two calls to
qemuTPMSetupEncryption() which simply ignore returned error. This
is suboptimal because then we rely on swtpm binary reporting a
generic error (something among invalid arguments) while an error
reported by qemuTPMSetupEncryption() is more specific.

Signed-off-by: Michal Privoznik <mprivozn@xxxxxxxxxx>
---
 src/qemu/qemu_tpm.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/qemu/qemu_tpm.c b/src/qemu/qemu_tpm.c
index 15ee7db757..502a77b5b3 100644
--- a/src/qemu/qemu_tpm.c
+++ b/src/qemu/qemu_tpm.c
@@ -635,7 +635,12 @@ qemuTPMEmulatorBuildCommand(virDomainTPMDef *tpm,
         }
 
         pwdfile_fd = qemuTPMSetupEncryption(tpm->data.emulator.secretuuid, cmd);
+        if (pwdfile_fd < 0)
+            goto error;
+
         migpwdfile_fd = qemuTPMSetupEncryption(tpm->data.emulator.secretuuid, cmd);
+        if (migpwdfile_fd < 0)
+            goto error;
 
         virCommandAddArg(cmd, "--key");
         virCommandAddArgFormat(cmd, "pwdfd=%d,mode=aes-256-cbc", pwdfile_fd);
-- 
2.37.4