Commit ca3bf5d47cec ("iommu/amd: Introduces ivrs_acpihid kernel parameter") in the kernel introduced an ill-formed kernel parameter, ivrs_acpihid. The problem is that it may have a dot on the key side: "ivrs_acpihid[00:14.5]=AMD0020:0". This could potentially trip our parser of module options, but right now it's working as intended: the only thing that happens is that after deciding "ivrs_acpihid[00:14" is a module name, it will fail the underscores() routine and the option will be ignored from the kmod pov (not kernel's pov since that driver parsers the kernel command line by itself). --- .../module-param-kcmdline6/correct.txt | 6 +++++ .../module-param-kcmdline6/proc/cmdline | 1 + testsuite/test-modprobe.c | 25 +++++++++++++++++++ 3 files changed, 32 insertions(+) create mode 100644 testsuite/rootfs-pristine/test-modprobe/module-param-kcmdline6/correct.txt create mode 100644 testsuite/rootfs-pristine/test-modprobe/module-param-kcmdline6/proc/cmdline diff --git a/testsuite/rootfs-pristine/test-modprobe/module-param-kcmdline6/correct.txt b/testsuite/rootfs-pristine/test-modprobe/module-param-kcmdline6/correct.txt new file mode 100644 index 0000000..7a087ef --- /dev/null +++ b/testsuite/rootfs-pristine/test-modprobe/module-param-kcmdline6/correct.txt @@ -0,0 +1,6 @@ +options psmouse foo=2 +options psmouse bar=1 +options psmouse zinga=test + +# End of configuration files. Dumping indexes now: + diff --git a/testsuite/rootfs-pristine/test-modprobe/module-param-kcmdline6/proc/cmdline b/testsuite/rootfs-pristine/test-modprobe/module-param-kcmdline6/proc/cmdline new file mode 100644 index 0000000..14bbd2e --- /dev/null +++ b/testsuite/rootfs-pristine/test-modprobe/module-param-kcmdline6/proc/cmdline @@ -0,0 +1 @@ +psmouse.foo=2 ivrs_acpihid[14:00.5]=AMD0020:00 psmouse.bar=1 psmouse.zinga=test diff --git a/testsuite/test-modprobe.c b/testsuite/test-modprobe.c index 1cace82..f908d56 100644 --- a/testsuite/test-modprobe.c +++ b/testsuite/test-modprobe.c @@ -328,6 +328,31 @@ DEFINE_TEST(modprobe_param_kcmdline5, ); +static noreturn int modprobe_param_kcmdline6(const struct test *t) +{ + const char *progname = ABS_TOP_BUILDDIR "/tools/modprobe"; + const char *const args[] = { + progname, + "-c", + NULL, + }; + + test_spawn_prog(progname, args); + exit(EXIT_FAILURE); +} +DEFINE_TEST(modprobe_param_kcmdline6, + .description = "check if dots on other parts of kcmdline don't confuse our parser", + .config = { + [TC_UNAME_R] = "4.4.4", + [TC_ROOTFS] = TESTSUITE_ROOTFS "test-modprobe/module-param-kcmdline6", + }, + .output = { + .out = TESTSUITE_ROOTFS "test-modprobe/module-param-kcmdline6/correct.txt", + }, + .modules_loaded = "", + ); + + static noreturn int modprobe_force(const struct test *t) { const char *progname = ABS_TOP_BUILDDIR "/tools/modprobe"; -- 2.25.1