From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50045) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gH787-00007J-P2 for qemu-devel@nongnu.org; Mon, 29 Oct 2018 08:58:52 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gH785-0002OO-Eu for qemu-devel@nongnu.org; Mon, 29 Oct 2018 08:58:51 -0400 Received: from smtp.nue.novell.com ([195.135.221.5]:33224) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gH785-0002ME-1m for qemu-devel@nongnu.org; Mon, 29 Oct 2018 08:58:49 -0400 From: Fei Li Date: Mon, 29 Oct 2018 20:58:12 +0800 Message-Id: <20181029125818.28720-2-fli@suse.com> In-Reply-To: <20181029125818.28720-1-fli@suse.com> References: <20181029125818.28720-1-fli@suse.com> Subject: [Qemu-devel] [PATCH RFC v6 1/7] Fix segmentation fault when qemu_signal_init fails List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: armbru@redhat.com, dgilbert@redhat.com, famz@redhat.com, peterx@redhat.com, quintela@redhat.com When qemu_signal_init() fails in qemu_init_main_loop(), we return without setting an error. Its callers crash then when they try to report the error with error_report_err(). To avoid such segmentation fault, add a new Error parameter to make the call trace to propagate the err to the final caller. Cc: Markus Armbruster Cc: Fam Zheng Signed-off-by: Fei Li Reviewed-by: Fam Zheng --- util/main-loop.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/util/main-loop.c b/util/main-loop.c index affe0403c5..443cb4cfe8 100644 --- a/util/main-loop.c +++ b/util/main-loop.c @@ -71,7 +71,7 @@ static void sigfd_handler(void *opaque) } } -static int qemu_signal_init(void) +static int qemu_signal_init(Error **errp) { int sigfd; sigset_t set; @@ -96,7 +96,7 @@ static int qemu_signal_init(void) sigdelset(&set, SIG_IPI); sigfd = qemu_signalfd(&set); if (sigfd == -1) { - fprintf(stderr, "failed to create signalfd\n"); + error_setg_errno(errp, errno, "failed to create signalfd"); return -errno; } @@ -109,7 +109,7 @@ static int qemu_signal_init(void) #else /* _WIN32 */ -static int qemu_signal_init(void) +static int qemu_signal_init(Error **errp) { return 0; } @@ -148,7 +148,7 @@ int qemu_init_main_loop(Error **errp) init_clocks(qemu_timer_notify_cb); - ret = qemu_signal_init(); + ret = qemu_signal_init(errp); if (ret) { return ret; } -- 2.13.7