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authorJackie Liu <liuyun01@kylinos.cn>2019-07-09 14:35:03 -0600
committerJens Axboe <axboe@kernel.dk>2019-07-09 14:35:03 -0600
commit78cafaa71d747b0e128bcefe933adb4d661702dc (patch)
tree1d020732fd98548bf7c8ee740b3b0623bfeb78b2
parentead15fa40e1d7556d986104c2112db0791b66d77 (diff)
Add regression test cases for kthread stuck
Signed-off-by: Jackie Liu <liuyun01@kylinos.cn> Signed-off-by: Jens Axboe <axboe@kernel.dk>
-rw-r--r--test/Makefile6
-rw-r--r--test/a4c0b3decb33-test.c172
2 files changed, 176 insertions, 2 deletions
diff --git a/test/Makefile b/test/Makefile
index 52b4c9e..98f863c 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -4,14 +4,14 @@ override CFLAGS += -Wall -D_GNU_SOURCE -L../src/
all_targets += poll poll-cancel ring-leak fsync io_uring_setup io_uring_register \
io_uring_enter nop sq-full cq-full 35fa71a030ca-test \
917257daa0fe-test b19062a56726-test eeed8b54e0df-test link \
- send_recvmsg
+ send_recvmsg a4c0b3decb33-test
all: $(all_targets)
test_srcs := poll.c poll-cancel.c ring-leak.c fsync.c io_uring_setup.c \
io_uring_register.c io_uring_enter.c nop.c sq-full.c cq-full.c \
35fa71a030ca-test.c 917257daa0fe-test.c b19062a56726-test.c \
- eeed8b54e0df-test.c link.c send_recvmsg.c
+ eeed8b54e0df-test.c link.c send_recvmsg.c a4c0b3decb33-test.c
test_objs := $(patsubst %.c,%.ol,$(test_srcs))
@@ -47,6 +47,8 @@ link: link.c
$(CC) $(CFLAGS) -o $@ link.c -luring
send_recvmsg: send_recvmsg.c
$(CC) $(CFLAGS) -o $@ send_recvmsg.c -luring
+a4c0b3decb33-test: a4c0b3decb33-test.c
+ $(CC) $(CFLAGS) -o $@ a4c0b3decb33-test.c -luring
clean:
rm -f $(all_targets) $(test_objs)
diff --git a/test/a4c0b3decb33-test.c b/test/a4c0b3decb33-test.c
new file mode 100644
index 0000000..e1e0706
--- /dev/null
+++ b/test/a4c0b3decb33-test.c
@@ -0,0 +1,172 @@
+// autogenerated by syzkaller (https://github.com/google/syzkaller)
+
+#include <dirent.h>
+#include <endian.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/prctl.h>
+#include <sys/stat.h>
+#include <sys/syscall.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+
+static void sleep_ms(uint64_t ms)
+{
+ usleep(ms * 1000);
+}
+
+static uint64_t current_time_ms(void)
+{
+ struct timespec ts;
+ if (clock_gettime(CLOCK_MONOTONIC, &ts))
+ exit(1);
+ return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
+}
+
+static bool write_file(const char* file, const char* what, ...)
+{
+ char buf[1024];
+ va_list args;
+ va_start(args, what);
+ vsnprintf(buf, sizeof(buf), what, args);
+ va_end(args);
+ buf[sizeof(buf) - 1] = 0;
+ int len = strlen(buf);
+ int fd = open(file, O_WRONLY | O_CLOEXEC);
+ if (fd == -1)
+ return false;
+ if (write(fd, buf, len) != len) {
+ int err = errno;
+ close(fd);
+ errno = err;
+ return false;
+ }
+ close(fd);
+ return true;
+}
+
+static void kill_and_wait(int pid, int* status)
+{
+ kill(-pid, SIGKILL);
+ kill(pid, SIGKILL);
+ int i;
+ for (i = 0; i < 100; i++) {
+ if (waitpid(-1, status, WNOHANG | __WALL) == pid)
+ return;
+ usleep(1000);
+ }
+ DIR* dir = opendir("/sys/fs/fuse/connections");
+ if (dir) {
+ for (;;) {
+ struct dirent* ent = readdir(dir);
+ if (!ent)
+ break;
+ if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0)
+ continue;
+ char abort[300];
+ snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort",
+ ent->d_name);
+ int fd = open(abort, O_WRONLY);
+ if (fd == -1) {
+ continue;
+ }
+ if (write(fd, abort, 1) < 0) {
+ }
+ close(fd);
+ }
+ closedir(dir);
+ } else {
+ }
+ while (waitpid(-1, status, __WALL) != pid) {
+ }
+}
+
+static void setup_test()
+{
+ prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
+ setpgrp();
+ write_file("/proc/self/oom_score_adj", "1000");
+}
+
+static void execute_one(void);
+
+#define WAIT_FLAGS __WALL
+
+static void loop(void)
+{
+ int iter;
+ for (iter = 0;; iter++) {
+ int pid = fork();
+ if (pid < 0)
+ exit(1);
+ if (pid == 0) {
+ setup_test();
+ execute_one();
+ exit(0);
+ }
+ int status = 0;
+ uint64_t start = current_time_ms();
+ for (;;) {
+ if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
+ break;
+ sleep_ms(1);
+ if (current_time_ms() - start < 5 * 1000)
+ continue;
+ kill_and_wait(pid, &status);
+ break;
+ }
+ }
+}
+
+#ifndef __NR_io_uring_setup
+#define __NR_io_uring_setup 425
+#endif
+
+void execute_one(void)
+{
+ *(uint32_t*)0x20000080 = 0;
+ *(uint32_t*)0x20000084 = 0;
+ *(uint32_t*)0x20000088 = 3;
+ *(uint32_t*)0x2000008c = 3;
+ *(uint32_t*)0x20000090 = 0x175;
+ *(uint32_t*)0x20000094 = 0;
+ *(uint32_t*)0x20000098 = 0;
+ *(uint32_t*)0x2000009c = 0;
+ *(uint32_t*)0x200000a0 = 0;
+ *(uint32_t*)0x200000a4 = 0;
+ *(uint32_t*)0x200000a8 = 0;
+ *(uint32_t*)0x200000ac = 0;
+ *(uint32_t*)0x200000b0 = 0;
+ *(uint32_t*)0x200000b4 = 0;
+ *(uint32_t*)0x200000b8 = 0;
+ *(uint32_t*)0x200000bc = 0;
+ *(uint32_t*)0x200000c0 = 0;
+ *(uint32_t*)0x200000c4 = 0;
+ *(uint64_t*)0x200000c8 = 0;
+ *(uint32_t*)0x200000d0 = 0;
+ *(uint32_t*)0x200000d4 = 0;
+ *(uint32_t*)0x200000d8 = 0;
+ *(uint32_t*)0x200000dc = 0;
+ *(uint32_t*)0x200000e0 = 0;
+ *(uint32_t*)0x200000e4 = 0;
+ *(uint32_t*)0x200000e8 = 0;
+ *(uint32_t*)0x200000ec = 0;
+ *(uint64_t*)0x200000f0 = 0;
+ syscall(__NR_io_uring_setup, 0x983, 0x20000080);
+}
+
+int main(void)
+{
+ syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
+ loop();
+ return 0;
+}