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From c1a2ef0efed557a3c7808e491a6b2638666ecd9e Mon Sep 17 00:00:00 2001
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From: Victor Toso <me@victortoso.com>
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Date: Mon, 26 Aug 2019 17:03:22 +0200
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Subject: [PATCH 10/11] covscan: initialize argv's copy
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Otherwise we get a CLANG_WARNING due accessing garbage.
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Covscan report:
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> spice-vdagent-0.19.0/src/vdagent/vdagent.c:471:9: warning: 1st function call argument is an uninitialized value
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> # execvp(orig_argv[0], orig_argv);
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> # ^ ~~~~~~~~~~~~
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> spice-vdagent-0.19.0/src/vdagent/vdagent.c:421:24: note: Storing uninitialized value
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> # char **orig_argv = g_memdup(argv, sizeof(char*) * (argc+1));
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> # ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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> spice-vdagent-0.19.0/src/vdagent/vdagent.c:434:9: note: Assuming 'error' is equal to NULL
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> # if (error != NULL) {
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> # ^~~~~~~~~~~~~
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> spice-vdagent-0.19.0/src/vdagent/vdagent.c:434:5: note: Taking false branch
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> # if (error != NULL) {
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> # ^
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> spice-vdagent-0.19.0/src/vdagent/vdagent.c:442:9: note: Assuming 'portdev' is not equal to NULL
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> # if (portdev == NULL)
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> # ^~~~~~~~~~~~~~~
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> spice-vdagent-0.19.0/src/vdagent/vdagent.c:442:5: note: Taking false branch
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> # if (portdev == NULL)
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> # ^
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> spice-vdagent-0.19.0/src/vdagent/vdagent.c:445:9: note: Assuming 'vdagentd_socket' is not equal to NULL
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> # if (vdagentd_socket == NULL)
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> # ^~~~~~~~~~~~~~~~~~~~~~~
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> spice-vdagent-0.19.0/src/vdagent/vdagent.c:445:5: note: Taking false branch
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> # if (vdagentd_socket == NULL)
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> # ^
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> spice-vdagent-0.19.0/src/vdagent/vdagent.c:448:30: note: Assuming 'do_daemonize' is 0
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> # openlog("spice-vdagent", do_daemonize ? LOG_PID : (LOG_PID | LOG_PERROR),
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> # ^~~~~~~~~~~~
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> spice-vdagent-0.19.0/src/vdagent/vdagent.c:448:30: note: '?' condition is false
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> spice-vdagent-0.19.0/src/vdagent/vdagent.c:451:9: note: Assuming the condition is false
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> # if (!g_file_test(portdev, G_FILE_TEST_EXISTS)) {
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> # ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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> spice-vdagent-0.19.0/src/vdagent/vdagent.c:451:5: note: Taking false branch
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> # if (!g_file_test(portdev, G_FILE_TEST_EXISTS)) {
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> # ^
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> spice-vdagent-0.19.0/src/vdagent/vdagent.c:457:9: note: Assuming 'do_daemonize' is 0
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> # if (do_daemonize)
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> # ^~~~~~~~~~~~
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> spice-vdagent-0.19.0/src/vdagent/vdagent.c:457:5: note: Taking false branch
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> # if (do_daemonize)
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> # ^
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> spice-vdagent-0.19.0/src/vdagent/vdagent.c:468:9: note: Assuming 'version_mismatch' is not equal to 0
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> # if (version_mismatch) {
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> # ^~~~~~~~~~~~~~~~
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> spice-vdagent-0.19.0/src/vdagent/vdagent.c:468:5: note: Taking true branch
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> # if (version_mismatch) {
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> # ^
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> spice-vdagent-0.19.0/src/vdagent/vdagent.c:471:9: note: 1st function call argument is an uninitialized value
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> # execvp(orig_argv[0], orig_argv);
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> # ^ ~~~~~~~~~~~~
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> # 469| syslog(LOG_INFO, "Version mismatch, restarting");
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> # 470| sleep(1);
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> # 471|-> execvp(orig_argv[0], orig_argv);
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> # 472| }
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> # 473|
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Signed-off-by: Victor Toso <victortoso@redhat.com>
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---
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src/vdagent/vdagent.c | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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diff --git a/src/vdagent/vdagent.c b/src/vdagent/vdagent.c
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index 0e2e73e..5b146db 100644
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--- a/src/vdagent/vdagent.c
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+++ b/src/vdagent/vdagent.c
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@@ -418,7 +418,10 @@ int main(int argc, char *argv[])
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GOptionContext *context;
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GError *error = NULL;
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VDAgent *agent;
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- char **orig_argv = g_memdup(argv, sizeof(char*) * (argc+1));
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+ char **orig_argv;
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+
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+ orig_argv = g_memdup(argv, sizeof(char*) * (argc+1));
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+ orig_argv[argc] = NULL;
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context = g_option_context_new(NULL);
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g_option_context_add_main_entries(context, entries, NULL);
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--
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2.21.0
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