From 20a192203222efde055df688cc344f9efb87c372 Mon Sep 17 00:00:00 2001 From: "Dr. David Alan Gilbert" Date: Fri, 25 Oct 2019 17:57:06 +0100 Subject: [PATCH 1/2] fw_cfg: Allow reboot-timeout=-1 again MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Commit ee5d0f89de3e53cdb0dc added range checking on reboot-timeout to only allow the range 0..65535; however both qemu and libvirt document the special value -1 to mean don't reboot. Allow it again. Fixes: ee5d0f89de3e53cdb0dc ("fw_cfg: Fix -boot reboot-timeout error checking") RH bz: https://bugzilla.redhat.com/show_bug.cgi?id=1765443 Signed-off-by: Dr. David Alan Gilbert Message-Id: <20191025165706.177653-1-dgilbert@redhat.com> Suggested-by: Laszlo Ersek Message-Id: <37ac197c-f20e-dd05-ff6a-13a2171c7148@redhat.com> [PMD: Applied Laszlo's suggestions] Reviewed-by: Laszlo Ersek Signed-off-by: Philippe Mathieu-Daudé --- hw/nvram/fw_cfg.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c index aef1727250..14f8437983 100644 --- a/hw/nvram/fw_cfg.c +++ b/hw/nvram/fw_cfg.c @@ -237,7 +237,7 @@ static void fw_cfg_bootsplash(FWCfgState *s) static void fw_cfg_reboot(FWCfgState *s) { const char *reboot_timeout = NULL; - int64_t rt_val = -1; + uint64_t rt_val = -1; uint32_t rt_le32; /* get user configuration */ @@ -247,10 +247,11 @@ static void fw_cfg_reboot(FWCfgState *s) if (reboot_timeout) { rt_val = qemu_opt_get_number(opts, "reboot-timeout", -1); + /* validate the input */ - if (rt_val < 0 || rt_val > 0xffff) { + if (rt_val > 0xffff && rt_val != (uint64_t)-1) { error_report("reboot timeout is invalid," - "it should be a value between 0 and 65535"); + "it should be a value between -1 and 65535"); exit(1); } } From eda4e62cc2f5d12fcedcf799a5a3f9eba855ad77 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Date: Tue, 29 Oct 2019 17:52:31 +0100 Subject: [PATCH 2/2] tests/fw_cfg: Test 'reboot-timeout=-1' special value MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The special value -1 means "don't reboot" for QEMU/libvirt. Add a trivial test. Reviewed-by: Dr. David Alan Gilbert Reviewed-by: Laszlo Ersek Signed-off-by: Philippe Mathieu-Daudé --- tests/fw_cfg-test.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/tests/fw_cfg-test.c b/tests/fw_cfg-test.c index 1d3147f821..5dc807ba23 100644 --- a/tests/fw_cfg-test.c +++ b/tests/fw_cfg-test.c @@ -194,6 +194,26 @@ static void test_fw_cfg_reboot_timeout(void) qtest_quit(s); } +static void test_fw_cfg_no_reboot_timeout(void) +{ + QFWCFG *fw_cfg; + QTestState *s; + uint32_t reboot_timeout = 0; + size_t filesize; + + /* Special value -1 means "don't reboot" */ + s = qtest_init("-boot reboot-timeout=-1"); + fw_cfg = pc_fw_cfg_init(s); + + filesize = qfw_cfg_get_file(fw_cfg, "etc/boot-fail-wait", + &reboot_timeout, sizeof(reboot_timeout)); + g_assert_cmpint(filesize, ==, sizeof(reboot_timeout)); + reboot_timeout = le32_to_cpu(reboot_timeout); + g_assert_cmpint(reboot_timeout, ==, UINT32_MAX); + pc_fw_cfg_uninit(fw_cfg); + qtest_quit(s); +} + static void test_fw_cfg_splash_time(void) { QFWCFG *fw_cfg; @@ -233,6 +253,7 @@ int main(int argc, char **argv) qtest_add_func("fw_cfg/numa", test_fw_cfg_numa); qtest_add_func("fw_cfg/boot_menu", test_fw_cfg_boot_menu); qtest_add_func("fw_cfg/reboot_timeout", test_fw_cfg_reboot_timeout); + qtest_add_func("fw_cfg/no_reboot_timeout", test_fw_cfg_no_reboot_timeout); qtest_add_func("fw_cfg/splash_time", test_fw_cfg_splash_time); return g_test_run();