[libvirt] [PATCH] qemu: detect truncated file as invalid save image
If managed save fails at the right point in time, then the save
image can end up with 0 bytes in length (no valid header), and
our attempts in commit 55d88def to detect and skip invalid save
files missed this case.
* src/qemu/qemu_driver.c (qemuDomainSaveImageOpen): Also unlink
empty file as corrupt. Reported by Dennis Householder.
---
src/qemu/qemu_driver.c | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 725b593..0d99ce4 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -3852,6 +3852,15 @@ qemuDomainSaveImageOpen(struct qemud_driver *driver,
goto error;
if (saferead(fd, &header, sizeof(header)) != sizeof(header)) {
+ if (unlink_corrupt) {
+ if (VIR_CLOSE(fd) < 0 || unlink(path) < 0) {
+ virReportSystemError(errno,
+ _("cannot remove corrupt file: %s"),
+ path);
+ goto error;
+ }
+ return -3;
+ }
qemuReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("failed to read qemu header"));
goto error;
--
1.7.7.4