stress2: Added new test cases

3 files changed, 456 insertions, 0 deletions

diff --git a/tools/test/stress2/misc/syzkaller48.sh b/tools/test/stress2/misc/syzkaller48.sh
new file mode 100755
index 000000000000..6cb59576bbfd
--- /dev/null
+++ b/tools/test/stress2/misc/syzkaller48.sh
@@ -0,0 +1,85 @@
+#!/bin/sh
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+
+# Fixed by:
+# 628c3b307fb2 - main - cache: only let non-dir descriptors through when doing EMPTYPATH lookups
+
+. ../default.cfg
+[ `id -u` -ne 0 ] && echo "Must be root!" && exit 1
+
+cat > /tmp/syzkaller48.c <<EOF
+// Reported-by: syzbot+9aa5439dd9c708aeb1a8@syzkaller.appspotmail.com
+
+#define _GNU_SOURCE
+
+#include <pwd.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 <unistd.h>
+
+#ifndef SYS___realpathat
+#define SYS___realpathat 574
+#endif
+
+uint64_t r[1] = {0xffffffffffffffff};
+
+int main(void)
+{
+ int i;
+
+  syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
+  intptr_t res = 0;
+  memcpy((void*)0x200000c0, "./file0\000", 8);
+  for (i = 0; i < 1000; i++) {
+  res = syscall(SYS_open, 0x200000c0ul, 0x48300ul, 0ul);
+  if (res != -1)
+    r[0] = res;
+  memcpy((void*)0x20000080, ".\000", 2);
+  syscall(SYS___realpathat, r[0], 0x20000080ul, 0x200002c0ul, 0xabul, 0ul);
+  close(res);
+  }
+  return 0;
+}
+EOF
+
+set -e
+mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint
+[ -c /dev/md$mdstart ] &&  mdconfig -d -u $mdstart
+mdconfig -a -t swap -s 5g -u $mdstart
+newfs $newfs_flags -n md$mdstart > /dev/null
+mount /dev/md$mdstart $mntpoint
+set +e
+
+mkdir $mntpoint/work
+mycc -o $mntpoint/work/syzkaller48 -Wall -Wextra -O0 /tmp/syzkaller48.c || exit 1
+
+while true; do
+	touch $mntpoint/work/file0
+	rm $mntpoint/work/file0
+done &
+
+start=`date +%s`
+while [ $((`date +%s` - start)) -lt 120 ]; do
+	(cd $mntpoint/work; ./syzkaller48)
+done
+kill $!
+wait
+ls -l $mntpoint/work
+
+for i in `jot 6`; do
+	mount | grep -q "on $mntpoint " || break
+	umount $mntpoint && break || sleep 10
+	[ $i -eq 6 ] &&
+	    { echo FATAL; fstat -mf $mntpoint; exit 1; }
+done
+mdconfig -d -u $mdstart
+
+rm -rf /tmp/syzkaller48.c
+exit 0
diff --git a/tools/test/stress2/misc/syzkaller49.sh b/tools/test/stress2/misc/syzkaller49.sh
new file mode 100755
index 000000000000..d2810be64c87
--- /dev/null
+++ b/tools/test/stress2/misc/syzkaller49.sh
@@ -0,0 +1,299 @@
+#!/bin/sh
+
+# Fatal trap 12: page fault while in kernel mode
+# cpuid = 10; apic id = 0a
+# fault virtual address   = 0x0
+# fault code              = supervisor read data, page not present
+# instruction pointer     = 0x20:0xffffffff80e04f35
+# stack pointer           = 0x28:0xfffffe014fd0fbc0
+# frame pointer           = 0x28:0xfffffe014fd0fc00
+# 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         = 13332 (repro77)
+# trap number             = 12
+# panic: page fault
+# cpuid = 10
+# time = 1640585179
+# KDB: stack backtrace:
+# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe014fd0f980
+# vpanic() at vpanic+0x17f/frame 0xfffffe014fd0f9d0
+# panic() at panic+0x43/frame 0xfffffe014fd0fa30
+# trap_fatal() at trap_fatal+0x385/frame 0xfffffe014fd0fa90
+# trap_pfault() at trap_pfault+0xab/frame 0xfffffe014fd0faf0
+# calltrap() at calltrap+0x8/frame 0xfffffe014fd0faf0
+# --- trap 0xc, rip = 0xffffffff80e04f35, rsp = 0xfffffe014fd0fbc0, rbp = 0xfffffe014fd0fc00 ---
+# tcp_usr_rcvd() at tcp_usr_rcvd+0x65/frame 0xfffffe014fd0fc00
+# soreceive_generic() at soreceive_generic+0xe44/frame 0xfffffe014fd0fcc0
+# soreceive() at soreceive+0x4b/frame 0xfffffe014fd0fce0
+# kern_recvit() at kern_recvit+0x1ba/frame 0xfffffe014fd0fd90
+# sys_recvmsg() at sys_recvmsg+0x6f/frame 0xfffffe014fd0fe00
+# amd64_syscall() at amd64_syscall+0x145/frame 0xfffffe014fd0ff30
+# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe014fd0ff30
+# --- syscall (0, FreeBSD ELF64, nosys), rip = 0x8020e328a, rsp = 0x22f48, rbp = 0x22f70 ---
+# KDB: enter: panic
+# [ thread pid 13332 tid 103311 ]
+# Stopped at      kdb_enter+0x37: movq    $0,0x128720e(%rip)
+# db> x/s version
+# version: FreeBSD 14.0-CURRENT #0 ufs-n251956-c3008785b91: Mon Dec 27 06:11:30 CET 2021
+# pho@mercat1.netperf.freebsd.org:/var/tmp/deviant3/sys/amd64/compile/PHO
+# db> 
+
+. ../default.cfg
+[ `id -u` -ne 0 ] && echo "Must be root!" && exit 1
+
+cat > /tmp/syzkaller49.c <<EOF
+// https://syzkaller.appspot.com/bug?id=efb2e9f019f36fbc39380724a31cb0c458bb4e61
+// autogenerated by syzkaller (https://github.com/google/syzkaller)
+// Reported-by: syzbot+93c75c4618b2a4f0f0ac@syzkaller.appspotmail.com
+
+#define _GNU_SOURCE
+
+#include <errno.h>
+#include <pthread.h>
+#include <pwd.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 <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 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 loop(void)
+{
+  int i, call, thread;
+  for (call = 0; call < 6; 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);
+}
+
+uint64_t r[1] = {0xffffffffffffffff};
+
+void execute_call(int call)
+{
+  intptr_t res = 0;
+  switch (call) {
+  case 0:
+    res = syscall(SYS_socket, 2ul, 1ul, 0);
+    if (res != -1)
+      r[0] = res;
+    break;
+  case 1:
+    *(uint8_t*)0x20000140 = 0x10;
+    *(uint8_t*)0x20000141 = 2;
+    *(uint16_t*)0x20000142 = htobe16(0x4e23);
+    *(uint32_t*)0x20000144 = htobe32(0x7f000001);
+    memset((void*)0x20000148, 0, 8);
+    syscall(SYS_bind, r[0], 0x20000140ul, 0x10ul);
+    break;
+  case 2:
+    *(uint8_t*)0x20000080 = 0x10;
+    *(uint8_t*)0x20000081 = 2;
+    *(uint16_t*)0x20000082 = htobe16(0x4e23);
+    *(uint32_t*)0x20000084 = htobe32(0x7f000001);
+    memset((void*)0x20000088, 0, 8);
+    syscall(SYS_sendto, r[0], 0ul, 0ul, 0ul, 0x20000080ul, 0x10ul);
+    break;
+  case 3:
+    memset((void*)0x20000100, 69, 1);
+    syscall(SYS_sendto, r[0], 0x20000100ul, 0xfda4ul, 0ul, 0ul, 0ul);
+    break;
+  case 4:
+    *(uint64_t*)0x200003c0 = 0;
+    *(uint32_t*)0x200003c8 = 0;
+    *(uint64_t*)0x200003d0 = 0x20000340;
+    *(uint64_t*)0x20000340 = 0x20000680;
+    *(uint64_t*)0x20000348 = 0x19000;
+    *(uint64_t*)0x200003d8 = 1;
+    *(uint64_t*)0x200003e0 = 0;
+    *(uint64_t*)0x200003e8 = 0;
+    *(uint32_t*)0x200003f0 = 0;
+    syscall(SYS_recvmsg, r[0], 0x200003c0ul, 0x40ul);
+    break;
+  case 5:
+    syscall(SYS_shutdown, r[0], 1ul);
+    break;
+  }
+}
+int main(void)
+{
+  syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
+  loop();
+  return 0;
+}
+EOF
+
+set -e
+mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint
+[ -c /dev/md$mdstart ] &&  mdconfig -d -u $mdstart
+mdconfig -a -t swap -s 5g -u $mdstart
+newfs $newfs_flags -n md$mdstart > /dev/null
+mount /dev/md$mdstart $mntpoint
+set +e
+
+mkdir $mntpoint/work
+mycc -o $mntpoint/work/syzkaller49 -Wall -Wextra -O0 /tmp/syzkaller49.c -lpthread || exit 1
+
+start=`date +%s`
+while [ $((`date +%s` - start)) -lt 120 ]; do
+	(cd $mntpoint/work; ./syzkaller49)
+done
+
+for i in `jot 6`; do
+	mount | grep -q "on $mntpoint " || break
+	umount $mntpoint && break || sleep 10
+	[ $i -eq 6 ] &&
+	    { echo FATAL; fstat -mf $mntpoint; exit 1; }
+done
+mdconfig -d -u $mdstart
+
+rm -rf /tmp/syzkaller49.c
+exit 0
diff --git a/tools/test/stress2/misc/unionfs13.sh b/tools/test/stress2/misc/unionfs13.sh
new file mode 100755
index 000000000000..69690d91e7d3
--- /dev/null
+++ b/tools/test/stress2/misc/unionfs13.sh
@@ -0,0 +1,72 @@
+#!/bin/sh
+
+#
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (c) 2022 Peter Holm
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+
+# Simple test to demonstrate EMLINK issue.
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+. ../default.cfg
+
+md1=$mdstart
+md2=$((md1 + 1))
+mp1=/mnt$md1
+mp2=/mnt$md2
+mkdir -p $mp1 $mp2
+set -e
+for i in $mp1 $mp2; do
+	mount | grep -q "on $i " && umount -f $i
+done
+for i in $md1 $md2; do
+	mdconfig -l | grep -q md$i && mdconfig -d -u $i
+done
+
+mdconfig -a -t swap -s 2g -u $md1
+mdconfig -a -t swap -s 2g -u $md2
+newfs $newfs_flags -n md$md1 > /dev/null
+newfs $newfs_flags -n md$md2 > /dev/null
+mount /dev/md$md1 $mp1
+mount /dev/md$md2 $mp2
+df -i $mp1 $mp2
+echo
+mount -t unionfs -o noatime $mp1 $mp2
+set +e
+
+df -i $mp2
+for i in `jot 100`; do
+	jot 1000 | xargs -P0 -I% mkdir $mp2/a% || { s=1; break; }
+	jot 1000 | xargs -P0 -I% rmdir $mp2/a%
+done
+[ $s ] && echo "Failed in loop #$i"
+df -i $mp2 | tail -1
+
+umount $mp2	# The unionfs mount
+umount $mp2
+umount $mp1
+mdconfig -d -u $md2
+mdconfig -d -u $md1
+exit $s