On 4/22/20 5:17 PM, Markus Armbruster wrote:
Philippe Mathieu-Daudé <phi...@redhat.com> writes:
On 4/22/20 3:07 PM, Markus Armbruster wrote:
The Error ** argument must be NULL, &error_abort, &error_fatal, or a
pointer to a variable containing NULL. Passing an argument of the
latter kind twice without clearing it in between is wrong: if the
first call sets an error, it no longer points to NULL for the second
qmp_guest_suspend_disk() and qmp_guest_suspend_ram() pass @local_err
first to check_suspend_mode(), then to acquire_privilege(), then to
execute_async(). Continuing after errors here can only end in tears.
For instance, we risk tripping error_setv()'s assertion.
Fixes: aa59637ea1c6a4c83430933f9c44c43e6c3f1b69
Fixes: f54603b6aa765514b2519e74114a2f417759d727
Cc: Michael Roth <mdr...@linux.vnet.ibm.com>
Signed-off-by: Markus Armbruster <arm...@redhat.com>
---
qga/commands-win32.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/qga/commands-win32.c b/qga/commands-win32.c
index 9717a8d52d..5ba56327dd 100644
--- a/qga/commands-win32.c
+++ b/qga/commands-win32.c
@@ -1322,9 +1322,16 @@ void qmp_guest_suspend_disk(Error **errp)
*mode = GUEST_SUSPEND_MODE_DISK;
check_suspend_mode(*mode, &local_err);
+ if (local_err) {
+ goto out;
+ }
acquire_privilege(SE_SHUTDOWN_NAME, &local_err);
+ if (local_err) {
+ goto out;
+ }
execute_async(do_suspend, mode, &local_err);
+out:
if (local_err) {
https://www.mail-archive.com/qemu-devel@nongnu.org/msg695647.html is
slightly different by removing the if() check.
It frees @mode unconditionally (marked --> below) I believe that's
wrong. execute_async() runs do_suspend() in a new thread, and passes it
@mode. do_suspend() frees it.
Oops I missed that, good catch!
Reviewed-by: Philippe Mathieu-Daudé <phi...@redhat.com>
error_propagate(errp, local_err);
g_free(mode);
@@ -1338,9 +1345,16 @@ void qmp_guest_suspend_ram(Error **errp)
*mode = GUEST_SUSPEND_MODE_RAM;
check_suspend_mode(*mode, &local_err);
+ if (local_err) {
+ goto out;
+ }
acquire_privilege(SE_SHUTDOWN_NAME, &local_err);
+ if (local_err) {
+ goto out;
+ }
execute_async(do_suspend, mode, &local_err);
+out:
if (local_err) {
error_propagate(errp, local_err);
g_free(mode);
diff --git a/qga/commands-win32.c b/qga/commands-win32.c
index b49920e201..8b66098056 100644
--- a/qga/commands-win32.c
+++ b/qga/commands-win32.c
@@ -1341,13 +1341,18 @@ void qmp_guest_suspend_disk(Error **errp)
*mode = GUEST_SUSPEND_MODE_DISK;
check_suspend_mode(*mode, &local_err);
+ if (local_err) {
+ goto out;
+ }
acquire_privilege(SE_SHUTDOWN_NAME, &local_err);
+ if (local_err) {
+ goto out;
+ }
execute_async(do_suspend, mode, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
- g_free(mode);
- }
+out:
+ error_propagate(errp, local_err);
-->+ g_free(mode);
}
void qmp_guest_suspend_ram(Error **errp)
