stress2: Added two syzkaller reproducers.

2 files changed, 623 insertions, 0 deletions

diff --git a/tools/test/stress2/misc/syzkaller31.sh b/tools/test/stress2/misc/syzkaller31.sh
new file mode 100755
index 000000000000..af93a89a127c
--- /dev/null
+++ b/tools/test/stress2/misc/syzkaller31.sh
@@ -0,0 +1,324 @@
+#!/bin/sh
+
+# panic: Bad tailq NEXT(0xfffffe0079608f00->tqh_last) != NULL
+# cpuid = 20
+# time = 1616404997
+# KDB: stack backtrace:
+# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe01af6d8580
+# vpanic() at vpanic+0x181/frame 0xfffffe01af6d85d0
+# panic() at panic+0x43/frame 0xfffffe01af6d8630
+# sctp_ss_default_add() at sctp_ss_default_add+0xd7/frame 0xfffffe01af6d8660
+# sctp_lower_sosend() at sctp_lower_sosend+0x3b24/frame 0xfffffe01af6d8830
+# sctp_sosend() at sctp_sosend+0x344/frame 0xfffffe01af6d8950
+# sosend() at sosend+0x66/frame 0xfffffe01af6d8980
+# kern_sendit() at kern_sendit+0x1ec/frame 0xfffffe01af6d8a10
+# sendit() at sendit+0x1db/frame 0xfffffe01af6d8a60
+# sys_sendmsg() at sys_sendmsg+0x61/frame 0xfffffe01af6d8ac0
+# amd64_syscall() at amd64_syscall+0x147/frame 0xfffffe01af6d8bf0
+# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe01af6d8bf0
+# --- syscall (0, FreeBSD ELF64, nosys), rip = 0x8003b042a, rsp = 0x7fffdffdcf68, rbp = 0x7fffdffdcf90 ---
+# KDB: enter: panic
+# [ thread pid 7402 tid 730532 ]
+# Stopped at      kdb_enter+0x37: movq    $0,0x1286f8e(%rip)
+# db> x/s version
+# version: FreeBSD 14.0-CURRENT #0 main-n245565-25bfa448602: Mon Mar 22 09:13:03 CET 2021
+# pho@t2.osted.lan:/usr/src/sys/amd64/compile/PHO\012
+# db>
+
+[ `uname -p` != "amd64" ] && exit 0
+
+. ../default.cfg
+kldstat -v | grep -q sctp || kldload sctp.ko
+
+cat > /tmp/syzkaller31.c <<EOF
+// https://syzkaller.appspot.com/bug?id=57c78914e36b822eaa173cfd681e4f63822e0844
+// autogenerated by syzkaller (https://github.com/google/syzkaller)
+// Reported-by: syzbot+ed6e8de942351d0309f4@syzkaller.appspotmail.com
+
+#define _GNU_SOURCE
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <pthread.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/endian.h>
+#include <sys/syscall.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+
+static void kill_and_wait(int pid, int* status)
+{
+  kill(pid, SIGKILL);
+  while (waitpid(-1, status, 0) != pid) {
+  }
+}
+
+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 void thread_start(void* (*fn)(void*), void* arg)
+{
+  pthread_t th;
+  pthread_attr_t attr;
+  pthread_attr_init(&attr);
+  pthread_attr_setstacksize(&attr, 128 << 10);
+  int i = 0;
+  for (; i < 100; i++) {
+    if (pthread_create(&th, &attr, fn, arg) == 0) {
+      pthread_attr_destroy(&attr);
+      return;
+    }
+    if (errno == EAGAIN) {
+      usleep(50);
+      continue;
+    }
+    break;
+  }
+  exit(1);
+}
+
+typedef struct {
+  pthread_mutex_t mu;
+  pthread_cond_t cv;
+  int state;
+} event_t;
+
+static void event_init(event_t* ev)
+{
+  if (pthread_mutex_init(&ev->mu, 0))
+    exit(1);
+  if (pthread_cond_init(&ev->cv, 0))
+    exit(1);
+  ev->state = 0;
+}
+
+static void event_reset(event_t* ev)
+{
+  ev->state = 0;
+}
+
+static void event_set(event_t* ev)
+{
+  pthread_mutex_lock(&ev->mu);
+  if (ev->state)
+    exit(1);
+  ev->state = 1;
+  pthread_mutex_unlock(&ev->mu);
+  pthread_cond_broadcast(&ev->cv);
+}
+
+static void event_wait(event_t* ev)
+{
+  pthread_mutex_lock(&ev->mu);
+  while (!ev->state)
+    pthread_cond_wait(&ev->cv, &ev->mu);
+  pthread_mutex_unlock(&ev->mu);
+}
+
+static int event_isset(event_t* ev)
+{
+  pthread_mutex_lock(&ev->mu);
+  int res = ev->state;
+  pthread_mutex_unlock(&ev->mu);
+  return res;
+}
+
+static int event_timedwait(event_t* ev, uint64_t timeout)
+{
+  uint64_t start = current_time_ms();
+  uint64_t now = start;
+  pthread_mutex_lock(&ev->mu);
+  for (;;) {
+    if (ev->state)
+      break;
+    uint64_t remain = timeout - (now - start);
+    struct timespec ts;
+    ts.tv_sec = remain / 1000;
+    ts.tv_nsec = (remain % 1000) * 1000 * 1000;
+    pthread_cond_timedwait(&ev->cv, &ev->mu, &ts);
+    now = current_time_ms();
+    if (now - start > timeout)
+      break;
+  }
+  int res = ev->state;
+  pthread_mutex_unlock(&ev->mu);
+  return res;
+}
+
+struct thread_t {
+  int created, call;
+  event_t ready, done;
+};
+
+static struct thread_t threads[16];
+static void execute_call(int call);
+static int running;
+
+static void* thr(void* arg)
+{
+  struct thread_t* th = (struct thread_t*)arg;
+  for (;;) {
+    event_wait(&th->ready);
+    event_reset(&th->ready);
+    execute_call(th->call);
+    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
+    event_set(&th->done);
+  }
+  return 0;
+}
+
+static void execute_one(void)
+{
+  int i, call, thread;
+  int collide = 0;
+again:
+  for (call = 0; call < 3; call++) {
+    for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
+         thread++) {
+      struct thread_t* th = &threads[thread];
+      if (!th->created) {
+        th->created = 1;
+        event_init(&th->ready);
+        event_init(&th->done);
+        event_set(&th->done);
+        thread_start(thr, th);
+      }
+      if (!event_isset(&th->done))
+        continue;
+      event_reset(&th->done);
+      th->call = call;
+      __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
+      event_set(&th->ready);
+      if (collide && (call % 2) == 0)
+        break;
+      event_timedwait(&th->done, 50);
+      break;
+    }
+  }
+  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
+    sleep_ms(1);
+  if (!collide) {
+    collide = 1;
+    goto again;
+  }
+}
+
+static void execute_one(void);
+
+#define WAIT_FLAGS 0
+
+static void loop(void)
+{
+  int iter = 0;
+  for (;; iter++) {
+    int pid = fork();
+    if (pid < 0)
+      exit(1);
+    if (pid == 0) {
+      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 < 5000) {
+        continue;
+      }
+      kill_and_wait(pid, &status);
+      break;
+    }
+  }
+}
+
+uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};
+
+void execute_call(int call)
+{
+  intptr_t res = 0;
+  switch (call) {
+  case 0:
+    res = syscall(SYS_socket, 2ul, 5ul, 0x84);
+    if (res != -1)
+      r[0] = res;
+    break;
+  case 1:
+    res = syscall(SYS_fcntl, r[0], 0ul, r[0]);
+    if (res != -1)
+      r[1] = res;
+    break;
+  case 2:
+    *(uint64_t*)0x20000040 = 0x20000000;
+    *(uint8_t*)0x20000000 = 0x1c;
+    *(uint8_t*)0x20000001 = 0x1c;
+    *(uint16_t*)0x20000002 = htobe16(0x4e22);
+    *(uint32_t*)0x20000004 = 0;
+    *(uint8_t*)0x20000008 = 0;
+    *(uint8_t*)0x20000009 = 0;
+    *(uint8_t*)0x2000000a = 0;
+    *(uint8_t*)0x2000000b = 0;
+    *(uint8_t*)0x2000000c = 0;
+    *(uint8_t*)0x2000000d = 0;
+    *(uint8_t*)0x2000000e = 0;
+    *(uint8_t*)0x2000000f = 0;
+    *(uint8_t*)0x20000010 = 0;
+    *(uint8_t*)0x20000011 = 0;
+    *(uint8_t*)0x20000012 = -1;
+    *(uint8_t*)0x20000013 = -1;
+    *(uint32_t*)0x20000014 = htobe32(0x203);
+    *(uint32_t*)0x20000018 = 0;
+    *(uint32_t*)0x20000048 = 0x1c;
+    *(uint64_t*)0x20000050 = 0x20000100;
+    *(uint64_t*)0x20000100 = 0x20000080;
+    memcpy((void*)0x20000080, "\000", 1);
+    *(uint64_t*)0x20000108 = 1;
+    *(uint32_t*)0x20000058 = 1;
+    *(uint64_t*)0x20000060 = 0x20000200;
+    memcpy(
+        (void*)0x20000200,
+        "\x1c\x00\x00\x00\x84\x00\x00\x00\x01\x00\x00\x00\x40\x08\xec\x70\xa0",
+        17);
+    *(uint32_t*)0x20000068 = 0x1c;
+    *(uint32_t*)0x2000006c = 0;
+    syscall(SYS_sendmsg, r[1], 0x20000040ul, 0ul);
+    break;
+  }
+}
+int main(void)
+{
+  syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
+  loop();
+  return 0;
+}
+EOF
+mycc -o /tmp/syzkaller31 -Wall -Wextra -O0 /tmp/syzkaller31.c -lpthread ||
+    exit 1
+
+(cd ../testcases/swap; ./swap -t 1m -i 20 -h > /dev/null 2>&1) &
+(cd /tmp; timeout 3m ./syzkaller31)
+while pkill swap; do :; done
+wait
+
+rm -rf /tmp/syzkaller31 syzkaller31.c /tmp/syzkaller.*
+exit 0
diff --git a/tools/test/stress2/misc/syzkaller32.sh b/tools/test/stress2/misc/syzkaller32.sh
new file mode 100755
index 000000000000..a95871969d5c
--- /dev/null
+++ b/tools/test/stress2/misc/syzkaller32.sh
@@ -0,0 +1,299 @@
+#!/bin/sh
+
+# Fatal trap 18: integer divide fault while in kernel mode
+# cpuid = 0; apic id = 00
+# instruction pointer     = 0x20:0xffffffff80c2f828
+# stack pointer           = 0x0:0xfffffe0131a5d9e0
+# frame pointer           = 0x0:0xfffffe0131a5da30
+# code segment            = base 0x0, limit 0xfffff, type 0x1b
+#                         = DPL 0, pres 1, long 1, def32 0, gran 1
+# processor eflags        = interrupt enabled, resume, IOPL = 0
+# current process         = 12 (swi4: clock (0))
+# trap number             = 18
+# panic: integer divide fault
+# cpuid = 0
+# time = 1616401924
+# KDB: stack backtrace:
+# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0131a5d6f0
+# vpanic() at vpanic+0x181/frame 0xfffffe0131a5d740
+# panic() at panic+0x43/frame 0xfffffe0131a5d7a0
+# trap_fatal() at trap_fatal+0x387/frame 0xfffffe0131a5d800
+# trap() at trap+0xa4/frame 0xfffffe0131a5d910
+# calltrap() at calltrap+0x8/frame 0xfffffe0131a5d910
+# --- trap 0x12, rip = 0xffffffff80c2f828, rsp = 0xfffffe0131a5d9e0, rbp = 0xfffffe0131a5da30 ---
+# realtimer_expire() at realtimer_expire+0x1a8/frame 0xfffffe0131a5da30
+# softclock_call_cc() at softclock_call_cc+0x15d/frame 0xfffffe0131a5db00
+# softclock() at softclock+0x66/frame 0xfffffe0131a5db20
+# ithread_loop() at ithread_loop+0x279/frame 0xfffffe0131a5dbb0
+# fork_exit() at fork_exit+0x80/frame 0xfffffe0131a5dbf0
+# fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0131a5dbf0
+# --- trap 0, rip = 0, rsp = 0, rbp = 0 ---
+# KDB: enter: panic
+# [ thread pid 12 tid 100160 ]
+# Stopped at      kdb_enter+0x37: movq    $0,0x1286f8e(%rip)
+# db> x/s version
+# version: FreeBSD 14.0-CURRENT #0 main-n245565-25bfa448602: Mon Mar 22 09:13:03 CET 2021
+# pho@t2.osted.lan:/usr/src/sys/amd64/compile/PHO\012
+# db>
+
+[ `uname -p` != "amd64" ] && exit 0
+
+. ../default.cfg
+cat > /tmp/syzkaller32.c <<EOF
+// https://syzkaller.appspot.com/bug?id=02c1b7d91203fd30b386eb023d4a99d1494de733
+// autogenerated by syzkaller (https://github.com/google/syzkaller)
+// Reported-by: syzbot+157b74ff493140d86eac@syzkaller.appspotmail.com
+
+#define _GNU_SOURCE
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <pthread.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/endian.h>
+#include <sys/syscall.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+
+static unsigned long long procid;
+
+static void kill_and_wait(int pid, int* status)
+{
+  kill(pid, SIGKILL);
+  while (waitpid(-1, status, 0) != pid) {
+  }
+}
+
+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 void thread_start(void* (*fn)(void*), void* arg)
+{
+  pthread_t th;
+  pthread_attr_t attr;
+  pthread_attr_init(&attr);
+  pthread_attr_setstacksize(&attr, 128 << 10);
+  int i = 0;
+  for (; i < 100; i++) {
+    if (pthread_create(&th, &attr, fn, arg) == 0) {
+      pthread_attr_destroy(&attr);
+      return;
+    }
+    if (errno == EAGAIN) {
+      usleep(50);
+      continue;
+    }
+    break;
+  }
+  exit(1);
+}
+
+typedef struct {
+  pthread_mutex_t mu;
+  pthread_cond_t cv;
+  int state;
+} event_t;
+
+static void event_init(event_t* ev)
+{
+  if (pthread_mutex_init(&ev->mu, 0))
+    exit(1);
+  if (pthread_cond_init(&ev->cv, 0))
+    exit(1);
+  ev->state = 0;
+}
+
+static void event_reset(event_t* ev)
+{
+  ev->state = 0;
+}
+
+static void event_set(event_t* ev)
+{
+  pthread_mutex_lock(&ev->mu);
+  if (ev->state)
+    exit(1);
+  ev->state = 1;
+  pthread_mutex_unlock(&ev->mu);
+  pthread_cond_broadcast(&ev->cv);
+}
+
+static void event_wait(event_t* ev)
+{
+  pthread_mutex_lock(&ev->mu);
+  while (!ev->state)
+    pthread_cond_wait(&ev->cv, &ev->mu);
+  pthread_mutex_unlock(&ev->mu);
+}
+
+static int event_isset(event_t* ev)
+{
+  pthread_mutex_lock(&ev->mu);
+  int res = ev->state;
+  pthread_mutex_unlock(&ev->mu);
+  return res;
+}
+
+static int event_timedwait(event_t* ev, uint64_t timeout)
+{
+  uint64_t start = current_time_ms();
+  uint64_t now = start;
+  pthread_mutex_lock(&ev->mu);
+  for (;;) {
+    if (ev->state)
+      break;
+    uint64_t remain = timeout - (now - start);
+    struct timespec ts;
+    ts.tv_sec = remain / 1000;
+    ts.tv_nsec = (remain % 1000) * 1000 * 1000;
+    pthread_cond_timedwait(&ev->cv, &ev->mu, &ts);
+    now = current_time_ms();
+    if (now - start > timeout)
+      break;
+  }
+  int res = ev->state;
+  pthread_mutex_unlock(&ev->mu);
+  return res;
+}
+
+struct thread_t {
+  int created, call;
+  event_t ready, done;
+};
+
+static struct thread_t threads[16];
+static void execute_call(int call);
+static int running;
+
+static void* thr(void* arg)
+{
+  struct thread_t* th = (struct thread_t*)arg;
+  for (;;) {
+    event_wait(&th->ready);
+    event_reset(&th->ready);
+    execute_call(th->call);
+    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
+    event_set(&th->done);
+  }
+  return 0;
+}
+
+static void execute_one(void)
+{
+  int i, call, thread;
+  for (call = 0; call < 2; call++) {
+    for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
+         thread++) {
+      struct thread_t* th = &threads[thread];
+      if (!th->created) {
+        th->created = 1;
+        event_init(&th->ready);
+        event_init(&th->done);
+        event_set(&th->done);
+        thread_start(thr, th);
+      }
+      if (!event_isset(&th->done))
+        continue;
+      event_reset(&th->done);
+      th->call = call;
+      __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
+      event_set(&th->ready);
+      event_timedwait(&th->done, 50);
+      break;
+    }
+  }
+  for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
+    sleep_ms(1);
+}
+
+static void execute_one(void);
+
+#define WAIT_FLAGS 0
+
+static void loop(void)
+{
+  int iter = 0;
+  for (;; iter++) {
+    int pid = fork();
+    if (pid < 0)
+      exit(1);
+    if (pid == 0) {
+      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 < 5000) {
+        continue;
+      }
+      kill_and_wait(pid, &status);
+      break;
+    }
+  }
+}
+
+uint64_t r[1] = {0x0};
+
+void execute_call(int call)
+{
+  intptr_t res = 0;
+  switch (call) {
+  case 0:
+    res = syscall(SYS_ktimer_create, 4ul, 0ul, 0x20000500ul);
+    if (res != -1)
+      r[0] = *(uint32_t*)0x20000500;
+    break;
+  case 1:
+    *(uint64_t*)0x20000100 = 0x200000000000000;
+    *(uint64_t*)0x20000108 = 0;
+    *(uint64_t*)0x20000110 = 0;
+    *(uint64_t*)0x20000118 = 0x10000;
+    syscall(SYS_ktimer_settime, r[0], 0ul, 0x20000100ul, 0ul);
+    break;
+  }
+}
+int main(void)
+{
+  syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
+  for (procid = 0; procid < 4; procid++) {
+    if (fork() == 0) {
+      loop();
+    }
+  }
+  sleep(1000000);
+  return 0;
+}
+EOF
+mycc -o /tmp/syzkaller32 -Wall -Wextra -O0 /tmp/syzkaller32.c -lpthread  ||
+    exit 1
+
+(cd ../testcases/swap; ./swap -t 1m -i 20 -h > /dev/null 2>&1) &
+(cd /tmp; timeout 3m ./syzkaller32)
+while pkill swap; do :; done
+wait
+
+rm -rf /tmp/syzkaller32 syzkaller32.c /tmp/syzkaller.*
+exit 0