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[PULL,02/45] vl: Fix an assert failure in error path

Message ID 20210617093134.900014-3-pbonzini@redhat.com
State New
Headers show
Series [PULL,01/45] vnc: avoid deprecation warnings for SASL on OS X | expand

Commit Message

Paolo Bonzini June 17, 2021, 9:30 a.m. UTC
From: Zhenzhong Duan <zhenzhong.duan@intel.com>

Based on the description of error_setg(), the local variable err in
qemu_maybe_daemonize() should be initialized to NULL.

Without fix, the uninitialized *errp triggers assert failure which
doesn't show much valuable information.

Before the fix:
qemu-system-x86_64: ../util/error.c:59: error_setv: Assertion `*errp == NULL' failed.

After fix:
qemu-system-x86_64: cannot create PID file: Cannot open pid file: Permission denied

Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Message-Id: <20210610084741.456260-1-zhenzhong.duan@intel.com>
Cc: qemu-stable@nongnu.org
Fixes: 0546c0609c ("vl: split various early command line options to a separate function", 2020-12-10)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 softmmu/vl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/softmmu/vl.c b/softmmu/vl.c
index 326c1e9080..feb4d201f3 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -2522,7 +2522,7 @@  static void qemu_process_help_options(void)
 static void qemu_maybe_daemonize(const char *pid_file)
-    Error *err;
+    Error *err = NULL;