Fork and create another filedesc to wait access to already hung GPU and then kill it. This triggers use after free of the request->batch_obj.
Signed-off-by: Mika Kuoppala <[email protected]> --- tests/gem_reset_stats.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) diff --git a/tests/gem_reset_stats.c b/tests/gem_reset_stats.c index 6c22bce..242300c 100644 --- a/tests/gem_reset_stats.c +++ b/tests/gem_reset_stats.c @@ -25,6 +25,7 @@ * */ +#define _GNU_SOURCE #include <unistd.h> #include <stdlib.h> #include <stdio.h> @@ -36,6 +37,7 @@ #include <sys/ioctl.h> #include <sys/mman.h> #include <time.h> +#include <signal.h> #include "i915_drm.h" #include "intel_bufmgr.h" @@ -637,6 +639,64 @@ static void test_close_pending(void) close(fd); } +static int __test_open_any(void) +{ + char *name; + int ret, fd; + + ret = asprintf(&name, "/dev/dri/card%d", drm_get_card()); + if (ret == -1) + return -1; + + fd = open(name, O_RDWR); + free(name); + + return fd; +} + +static void test_close_pending_fork(void) +{ + int pid; + int fd, fd2, h; + + fd = drm_open_any(); + igt_assert(fd >= 0); + + assert_reset_status(fd, 0, RS_NO_ERROR); + + igt_disable_exit_handler(); + + h = inject_hang(fd, 0); + igt_assert(h >= 0); + + sleep(1); + + pid = fork(); + if (pid == 0) { + fd2 = __test_open_any(); + igt_assert(fd2 >= 0); + gem_quiescent_gpu(fd2); + close(fd2); + } else { + igt_assert(pid > 0); + sleep(1); + kill(pid, SIGKILL); + } + + gem_close(fd, h); + close(fd); + + fd = drm_open_any(); + igt_assert(fd >= 0); + + h = exec_valid(fd, 0); + igt_assert(h >= 0); + + gem_sync(fd, h); + gem_close(fd, h); + close(fd); +} + static void drop_root(void) { igt_assert(getuid() == 0); @@ -837,6 +897,9 @@ igt_main igt_subtest("close-pending") test_close_pending(); + igt_subtest("close-pending-fork") + test_close_pending_fork(); + igt_subtest("params") test_params(); } -- 1.7.9.5 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
