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stress2: Added two syzkaller reproducers

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This commit is contained in:
Peter Holm
2021-10-26 09:59:04 +00:00
parent 23024f004a
commit cbc3ecb7ef
3 changed files with 524 additions and 0 deletions
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tools/test/stress2/misc/all.exclude
+2
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@@ -70,6 +70,8 @@ syzkaller40.sh WiP 20210607
syzkaller41.sh WiP 20210607
syzkaller42.sh WiP 20210613
syzkaller43.sh WiP 20210906
syzkaller46.sh WiP 20211026
syzkaller47.sh WiP 20211026
truss3.sh WiP 20200915
unionfs.sh insmntque: non-locked vp: xx is not exclusive locked... 20130909
unionfs2.sh insmntque: mp-safe fs and non-locked vp is not ... 20111219
tools/test/stress2/misc/syzkaller46.sh
Executable
+118
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@@ -0,0 +1,118 @@
#!/bin/sh
# Fatal trap 12: page fault while in kernel mode
# cpuid = 4; apic id = 04
# fault virtual address = 0x28
# fault code = supervisor read data, page not present
# instruction pointer = 0x20:0xffffffff81549dea
# stack pointer = 0x28:0xfffffe01d8689480
# frame pointer = 0x28:0xfffffe01d8689490
# 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 = 3050 (syzkaller46)
# trap number = 12
# panic: page fault
# cpuid = 4
# time = 1635158869
# KDB: stack backtrace:
# db_trace_self_wrapper() at db_trace_self_wrapper+0xa5/frame 0xfffffe01d8688cb0
# kdb_backtrace() at kdb_backtrace+0xc9/frame 0xfffffe01d8688e10
# vpanic() at vpanic+0x248/frame 0xfffffe01d8688ef0
# panic() at panic+0xb5/frame 0xfffffe01d8688fb0
# trap_fatal() at trap_fatal+0x52e/frame 0xfffffe01d86890b0
# trap_pfault() at trap_pfault+0x132/frame 0xfffffe01d86891d0
# trap() at trap+0x53f/frame 0xfffffe01d86893b0
# calltrap() at calltrap+0x8/frame 0xfffffe01d86893b0
# --- trap 0xc, rip = 0xffffffff81549dea, rsp = 0xfffffe01d8689480, rbp = 0xfffffe01d8689490 ---
# filt_bpfwrite() filt_bpfwrite+0x4a/frame 0xfffffe01d8689490
# kqueue_register() at kqueue_register+0xea3/frame 0xfffffe01d86895d0
# kqueue_kevent() at kqueue_kevent+0x26a/frame 0xfffffe01d86899c0
# kern_kevent_fp() at kern_kevent_fp+0xd2/frame 0xfffffe01d8689a10
# kern_kevent() at kern_kevent+0x138/frame 0xfffffe01d8689b10
# kern_kevent_generic() at kern_kevent_gene6/frame 0xfffffesys_kevent() at sys_kevent+0x1e1/frame 0xfffffe01d8689d30
# amd64_syscall() at amd64_syscall+0x31e/frame 0xfffffe01d8689f30
# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe01d8689f30
# --- syscall (0, FreeBSD ELF64, nosys), rip = 0x8003adafa, rsp = 0x7fffffffe648, rbp = 0x7fffffffe670 ---
# KDB: enter: panic
# [ thread pid 3050 tid 100263 ]
# Stopped at kdb_enter+0x37: movq $0,0x2638c4e(%rip)
# db> x/s version
# version: FreeBSD 14.0-CURRENT #0 main-n250242-eab5358b9080-dirty: Mon Oct 25 11:32:45 CEST 2021
# pho@mercat1.netperf.freebsd.org
# db>
[ `uname -p` != "amd64" ] && exit 0
[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
. ../default.cfg
cat > /tmp/syzkaller46.c <<EOF
// https://syzkaller.appspot.com/bug?id=a99f705b2b8b854d70ec4d47eed481c90046bd3c
// autogenerated by syzkaller (https://github.com/google/syzkaller)
// Reported-by: syzbot+ae45d5166afe15a5a21d@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[1] = {0xffffffffffffffff};
int main(void)
{
syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
intptr_t res = 0;
memcpy((void*)0x20000040, "/dev/bpf\000", 9);
syscall(SYS_openat, 0xffffffffffffff9cul, 0x20000040ul, 0ul, 0ul);
res = syscall(SYS_kqueue);
if (res != -1)
r[0] = res;
*(uint64_t*)0x20000480 = 0x284;
*(uint16_t*)0x20000488 = 0xfff8;
*(uint16_t*)0x2000048a = 0x10;
*(uint32_t*)0x2000048c = 1;
*(uint64_t*)0x20000490 = 0x401;
*(uint64_t*)0x20000498 = 5;
*(uint64_t*)0x200004a0 = 5;
*(uint64_t*)0x200004a8 = 0x24000000;
*(uint64_t*)0x200004b0 = 0x100000000;
*(uint64_t*)0x200004b8 = 0x3f;
*(uint64_t*)0x200004c0 = 3;
*(uint16_t*)0x200004c8 = 0xfffe;
*(uint16_t*)0x200004ca = 1;
*(uint32_t*)0x200004cc = 1;
*(uint64_t*)0x200004d0 = 1;
*(uint64_t*)0x200004d8 = 3;
*(uint64_t*)0x200004e0 = 9;
*(uint64_t*)0x200004e8 = 0x3ff;
*(uint64_t*)0x200004f0 = 0x100000001;
*(uint64_t*)0x200004f8 = 3;
*(uint64_t*)0x20000500 = 5;
*(uint16_t*)0x20000508 = 0xfffe;
*(uint16_t*)0x2000050a = 0x42;
*(uint32_t*)0x2000050c = 2;
*(uint64_t*)0x20000510 = 5;
*(uint64_t*)0x20000518 = 0x7f;
*(uint64_t*)0x20000520 = 9;
*(uint64_t*)0x20000528 = 0x600000000;
*(uint64_t*)0x20000530 = 0x1f;
*(uint64_t*)0x20000538 = 7;
syscall(SYS_kevent, r[0], 0x20000480ul, 3ul, 0x200001c0ul, 0xaul, 0ul);
return 0;
}
EOF
mycc -o /tmp/syzkaller46 -Wall -Wextra -O0 /tmp/syzkaller46.c -lpthread || exit 1
(cd /tmp; ./syzkaller46)
rm -rf /tmp/syzkaller46 /tmp/syzkaller46.c /tmp/syzkaller.*
exit 0
tools/test/stress2/misc/syzkaller47.sh
Executable
+404
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@@ -0,0 +1,404 @@
#!/bin/sh
# panic: ASan: Invalid access, 32-byte read at 0xfffffe01f76145a0, UseAfterScope(f8)
# cpuid = 3
# time = 1635158022
# KDB: stack backtrace:
# db_trace_self_wrapper() at db_trace_self_wrapper+0xa5/frame 0xfffffe01f7614170
# kdb_backtrace() at kdb_backtrace+0xc9/frame 0xfffffe01f76142d0
# vpanic() at vpanic+0x248/frame 0xfffffe01f76143b0
# panic() at panic+0xb5/frame 0xfffffe01f7614480
# __asan_storeN() at __asan_storeN/frame 0xfffffe01f7614550
# smp_masked_invlpg_range() at smp_masked_invlpg_range+0xb2/frame 0xfffffe01f7614630
# pmap_invalidate_range() at pmap_invalidate_range+0x22b/frame 0xfffffe01f7614730
# vm_thread_stack_create() at vm_thread_stack_create+0xf5/frame 0xfffffe01f7614910
# kstack_import() at kstack_import+0xcache_alloc() at cache_alloc+0x556/frame 0xfffffe01f7614a10
# cache_alloc_retry() at cache_alloc_retry+0x30/frame 0xfffffe01f7614a80
# vm_thread_new() at vm_thread_new+0x61/frame 0xfffffe01f7614ab0
# thread_alloc() at thread_alloc+0x5f/frame 0xfffffe01f7614af0
# thread_create() at thread_create+0x1b3/frame 0xfffffe01f7614bf0
# sys_thr_new() at sys_thr_new+0x15a/framd30
# amd64_syscall() at amd64_syscall+0x31e/frame 0xfffffe01f7614f30
# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe01f7614f30
# --- syscall (0, FreeBSD ELF64, nosys), rip = 0x8003afafa, rsp = 0x7fffdfffdf58, rbp = 0x7fffdfffdf70 ---
# KDB: enter: panic
# [ thread pid 69407 tid 100937 ]
# Stopped at kdb_enter+0x37: movq $0,0x2638c4e(%rip)
# db> x/s version
# version: FreeBSD 14.0-CURRENT #0 main-n250242-eab5358b9080-dirty: Mon Oct 25 11:32:45 CEST 2021
# pho@mercat1.netperf.freebsd.org:/usr/src/sys/amd64/compile/PHO-KASAN
# db>
[ `uname -p` != "amd64" ] && exit 0
[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
[ "`sysctl -in kern.features.kasan`" != "1" ] && exit 0
. ../default.cfg
cat > /tmp/syzkaller47.c <<EOF
// https://syzkaller.appspot.com/bug?id=5676c1c4b457596c1a8782e4a8533f4e9ff2aa0e
// autogenerated by syzkaller (https://github.com/google/syzkaller)
// Reported-by: syzbot+a5898c11651b423b501f@syzkaller.appspotmail.com
#define _GNU_SOURCE
#include <sys/types.h>
#include <dirent.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/resource.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
static __thread int skip_segv;
static __thread jmp_buf segv_env;
static void segv_handler(int sig, siginfo_t* info, void* ctx __unused)
{
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 use_temporary_dir(void)
{
char tmpdir_template[] = "./syzkaller.XXXXXX";
char* tmpdir = mkdtemp(tmpdir_template);
if (!tmpdir)
exit(1);
if (chmod(tmpdir, 0777))
exit(1);
if (chdir(tmpdir))
exit(1);
}
static void __attribute__((noinline)) remove_dir(const char* dir)
{
DIR* dp = opendir(dir);
if (dp == NULL) {
if (errno == EACCES) {
if (rmdir(dir))
exit(1);
return;
}
exit(1);
}
struct dirent* ep = 0;
while ((ep = readdir(dp))) {
if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
continue;
char filename[FILENAME_MAX];
snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
struct stat st;
if (lstat(filename, &st))
exit(1);
if (S_ISDIR(st.st_mode)) {
remove_dir(filename);
continue;
}
if (unlink(filename))
exit(1);
}
closedir(dp);
if (rmdir(dir))
exit(1);
}
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;
}
static void sandbox_common()
{
struct rlimit rlim;
rlim.rlim_cur = rlim.rlim_max = 128 << 20;
setrlimit(RLIMIT_AS, &rlim);
rlim.rlim_cur = rlim.rlim_max = 8 << 20;
setrlimit(RLIMIT_MEMLOCK, &rlim);
rlim.rlim_cur = rlim.rlim_max = 1 << 20;
setrlimit(RLIMIT_FSIZE, &rlim);
rlim.rlim_cur = rlim.rlim_max = 1 << 20;
setrlimit(RLIMIT_STACK, &rlim);
rlim.rlim_cur = rlim.rlim_max = 0;
setrlimit(RLIMIT_CORE, &rlim);
rlim.rlim_cur = rlim.rlim_max = 256;
setrlimit(RLIMIT_NOFILE, &rlim);
}
static void loop();
static int do_sandbox_none(void)
{
sandbox_common();
loop();
return 0;
}
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 < 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);
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++) {
char cwdbuf[32];
sprintf(cwdbuf, "./%d", iter);
if (mkdir(cwdbuf, 0777))
exit(1);
int pid = fork();
if (pid < 0)
exit(1);
if (pid == 0) {
if (chdir(cwdbuf))
exit(1);
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;
}
remove_dir(cwdbuf);
}
}
void execute_call(int call)
{
switch (call) {
case 0:
syscall(SYS_rfork, 0x4030ul);
break;
case 1:
syscall(SYS_thr_new, 0ul, 0ul);
break;
}
}
int main(void)
{
syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
install_segv_handler();
use_temporary_dir();
do_sandbox_none();
return 0;
}
EOF
mycc -o /tmp/syzkaller47 -Wall -Wextra -O0 /tmp/syzkaller47.c -lpthread || exit 1
(cd /tmp; timeout 2m ./syzkaller47)
rm -rf /tmp/syzkaller47 /tmp/syzkaller47.c /tmp/syzkaller.*
exit 0