stress2: Added two syzkaller reproducers

main
Peter Holm 1 week ago
parent 86d00db451
commit 5b42ac2914
  1. 319
      tools/test/stress2/misc/syzkaller61.sh
  2. 83
      tools/test/stress2/misc/syzkaller62.sh

@ -0,0 +1,319 @@
#!/bin/sh
# Seen:
# [root@mercat1 /usr/src/tools/test/stress2/misc]# pgrep syzkaller61 | xargs procstat -k
# PID TID COMM TDNAME KSTACK
# 13332 106396 syzkaller61 - mi_switch thread_suspend_check ast_suspend ast_handler ast doreti_ast
# 13332 560662 syzkaller61 - mi_switch sleepq_switch sleepq_catch_signals sleepq_wait_sig _sleep umtxq_sleep do_wait __umtx_op_wait_uint_private sys__umtx_op amd64_syscall fast_syscall_common
# 13332 560776 syzkaller61 - mi_switch thread_suspend_switch thread_single fork1 sys_rfork amd64_syscall fast_syscall_common
# 13662 356440 syzkaller61 - mi_switch thread_suspend_check ast_suspend ast_handler ast doreti_ast
# 13662 561098 syzkaller61 - mi_switch sleepq_switch sleepq_catch_signals sleepq_wait_sig _sleep umtxq_sleep do_wait __umtx_op_wait_uint_private sys__umtx_op amd64_syscall fast_syscall_common
# 13662 561160 syzkaller61 - mi_switch thread_suspend_switch thread_single fork1 sys_rfork amd64_syscall fast_syscall_common
# [root@mercat1 /usr/src/tools/test/stress2/misc]#
[ `uname -p` != "amd64" ] && exit 0
. ../default.cfg
cat > /tmp/syzkaller61.c <<EOF
// https://syzkaller.appspot.com/bug?id=00d8ca63243899ffb67b15ec93aee4ffa2f06637
// autogenerated by syzkaller (https://github.com/google/syzkaller)
// Reported-by: syzbot+647212368c3f32c6f13f@syzkaller.appspotmail.com
#define _GNU_SOURCE
#include <sys/types.h>
#include <errno.h>
#include <pthread.h>
#include <pwd.h>
#include <setjmp.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 __thread int clone_ongoing;
static __thread int skip_segv;
static __thread jmp_buf segv_env;
static void segv_handler(int sig, siginfo_t* info, void* ctx __unused)
{
if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) {
exit(sig);
}
uintptr_t addr = (uintptr_t)info->si_addr;
const uintptr_t prog_start = 1 << 20;
const uintptr_t prog_end = 100 << 20;
int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0;
int valid = addr < prog_start || addr > prog_end;
if (sig == SIGBUS)
valid = 1;
if (skip && valid) {
_longjmp(segv_env, 1);
}
exit(sig);
}
static void install_segv_handler(void)
{
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_sigaction = segv_handler;
sa.sa_flags = SA_NODEFER | SA_SIGINFO;
sigaction(SIGSEGV, &sa, NULL);
sigaction(SIGBUS, &sa, NULL);
}
#define NONFAILING(...) \
({ \
int ok = 1; \
__atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST); \
if (_setjmp(segv_env) == 0) { \
__VA_ARGS__; \
} else \
ok = 0; \
__atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST); \
ok; \
})
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;
}
}
}
void execute_call(int call)
{
switch (call) {
case 0:
NONFAILING(*(uint32_t*)0x20001f00 = 0x16);
NONFAILING(*(uint32_t*)0x20001f04 = 0);
NONFAILING(*(uint32_t*)0x20001f08 = 0);
NONFAILING(*(uint32_t*)0x20001f0c = 0);
NONFAILING(*(uint32_t*)0x20001f10 = 0);
NONFAILING(memset((void*)0x20001f14, 0, 60));
syscall(SYS_procctl, 0ul, 0, 6ul, 0x20001f00ul);
break;
case 1:
syscall(SYS_rfork, 0x85000ul);
break;
}
}
int main(void)
{
syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
install_segv_handler();
loop();
return 0;
}
EOF
mycc -o /tmp/syzkaller61 -Wall -Wextra -O0 /tmp/syzkaller61.c -lpthread ||
exit 1
(cd ../testcases/swap; ./swap -t 3m -i 10 -l 100 > /dev/null 2>&1) &
for i in `jot 300`; do
(cd /tmp; timeout -k 3s 2s ./syzkaller61) &
pids="$pids $!"
done
sleep 5
pkill -9 syzkaller61 swap; sleep 1
pgrep -q syzkaller61 && { pgrep syzkaller61 | xargs ps -lHp; exit 1; }
for pid in $pids; do
wait $pid
done
while pkill swap; do :; done
wait
rm -rf /tmp/syzkaller61 /tmp/syzkaller61.c /tmp/syzkaller61.core \
/tmp/syzkaller.??????
exit 0

@ -0,0 +1,83 @@
#!/bin/sh
# panic: Assertion sb->sb_hiwat >= sb->uxdg_cc failed at ../../../kern/uipc_usrreq.c:1099
# cpuid = 9
# time = 1660909804
# KDB: stack backtrace:
# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe01401e7970
# vpanic() at vpanic+0x151/frame 0xfffffe01401e79c0
# panic() at panic+0x43/frame 0xfffffe01401e7a20
# uipc_dgram_sbspace() at uipc_dgram_sbspace+0x51/frame 0xfffffe01401e7a30
# uipc_sosend_dgram() at uipc_sosend_dgram+0x690/frame 0xfffffe01401e7ac0
# sosend() at sosend+0x49/frame 0xfffffe01401e7af0
# soo_write() at soo_write+0x43/frame 0xfffffe01401e7b20
# filemon_close_log() at filemon_close_log+0xd5/frame 0xfffffe01401e7b90
# filemon_dtr() at filemon_dtr+0x31/frame 0xfffffe01401e7bb0
# devfs_destroy_cdevpriv() at devfs_destroy_cdevpriv+0xab/frame 0xfffffe01401e7bd0
# devfs_close_f() at devfs_close_f+0x64/frame 0xfffffe01401e7c00
# _fdrop() at _fdrop+0x1b/frame 0xfffffe01401e7c20
# closef() at closef+0x1db/frame 0xfffffe01401e7cb0
# fdescfree() at fdescfree+0x433/frame 0xfffffe01401e7d80
# exit1() at exit1+0x4df/frame 0xfffffe01401e7df0
# sys_exit() at sys_exit+0xd/frame 0xfffffe01401e7e00
# amd64_syscall() at amd64_syscall+0x145/frame 0xfffffe01401e7f30
# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe01401e7f30
# --- syscall (1, FreeBSD ELF64, sys_exit), rip = 0x82301d16a, rsp = 0x8209bf628, rbp = 0x8209bf640 ---
# KDB: enter: panic
# [ thread pid 2876 tid 100222 ]
# Stopped at x32: movq $0,0x12a1323(%rip)
# db> x/s version
# version: FreeBSD 14.0-CURRENT #0 main-n257506-eed634d113d-dirty: Thu Aug 18 13:56:53 CEST 2022
# pho@mercat1.netperf.freebsd.org:/usr/src/sys/amd64/compile/PHO\012
# db>
. ../default.cfg
cat > /tmp/syzkaller62.c <<EOF
// https://syzkaller.appspot.com/bug?id=582310beb894769fc836748eec49b8d2f905e5ef
// autogenerated by syzkaller (https://github.com/google/syzkaller)
// Reported-by: syzbot+6e8be1ec8d77578a3df4@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>
uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};
int main(void)
{
syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
intptr_t res = 0;
memcpy((void*)0x20000040, "/dev/filemon\000", 13);
res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x20000040ul, 0ul, 0ul);
if (res != -1)
r[0] = res;
res = syscall(SYS_socketpair, 1ul, 2ul, 0, 0x20000080ul);
if (res != -1)
r[1] = *(uint32_t*)0x20000084;
*(uint32_t*)0x200000c0 = r[1];
syscall(SYS_ioctl, r[0], 0xc0045301ul, 0x200000c0ul);
*(uint32_t*)0x20000040 = 3;
syscall(SYS_setsockopt, r[1], 0xffff, 0x1001, 0x20000040ul, 4ul);
return 0;
}
EOF
mycc -o /tmp/syzkaller62 -Wall -Wextra -O0 /tmp/syzkaller62.c || exit 1
kldstat | grep -q filemon || { kldload filemon.ko && loaded=1; }
(cd /tmp; timeout -k 3s 2s ./syzkaller62)
rm -rf /tmp/syzkaller62 /tmp/syzkaller62.c /tmp/syzkaller62.core \
/tmp/syzkaller.??????
# Unload causes: Fatal trap 12: page fault while in kernel mode
#[ $loaded ] && kldunload -f filemon.ko
exit 0
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