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stress2: Added two syzkaller reproducers.

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This commit is contained in:
Peter Holm 2021-03-22 11:26:39 +01:00
parent 74ada297e8
commit 6d5586da63
2 changed files with 623 additions and 0 deletions
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324
tools/test/stress2/misc/syzkaller31.sh Executable file
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@ -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

299
tools/test/stress2/misc/syzkaller32.sh Executable file
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#!/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