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 <mika.kuoppala@xxxxxxxxx>
---
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
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