diff options
Diffstat (limited to 'tools/test/stress2/misc/syzkaller23.sh')
| -rwxr-xr-x | tools/test/stress2/misc/syzkaller23.sh | 400 |
1 files changed, 400 insertions, 0 deletions
diff --git a/tools/test/stress2/misc/syzkaller23.sh b/tools/test/stress2/misc/syzkaller23.sh new file mode 100755 index 000000000000..917093052265 --- /dev/null +++ b/tools/test/stress2/misc/syzkaller23.sh @@ -0,0 +1,400 @@ +#!/bin/sh + +# panic: Bad link elm 0xfffff80b62eb7500 prev->next != elm +# cpuid = 2 +# time = 1598546886 +# KDB: stack backtrace: +# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe010154a6e0 +# vpanic() at vpanic+0x182/frame 0xfffffe010154a730 +# panic() at panic+0x43/frame 0xfffffe010154a790 +# unp_disconnect() at unp_disconnect+0x279/frame 0xfffffe010154a7c0 +# uipc_disconnect() at uipc_disconnect+0xfd/frame 0xfffffe010154a800 +# soclose() at soclose+0xa2/frame 0xfffffe010154a870 +# _fdrop() at _fdrop+0x1a/frame 0xfffffe010154a890 +# closef() at closef+0x1ea/frame 0xfffffe010154a920 +# fdescfree_fds() at fdescfree_fds+0x8c/frame 0xfffffe010154a980 +# fdescfree() at fdescfree+0x3cd/frame 0xfffffe010154aa50 +# exit1() at exit1+0x487/frame 0xfffffe010154aac0 +# sys_sys_exit() at sys_sys_exit+0xd/frame 0xfffffe010154aad0 +# amd64_syscall() at amd64_syscall+0x159/frame 0xfffffe010154abf0 +# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe010154abf0 +# --- syscall (1, FreeBSD ELF64, sys_sys_exit), rip = 0x80045376a, rsp = 0x7fffffffe4c8, rbp = 0x7fffffffe4e0 --- + +[ `uname -p` != "amd64" ] && exit 0 + +# Obtained from markj (syzkaller). + +. ../default.cfg +cat > /tmp/syzkaller23.c <<EOF +// autogenerated by syzkaller (https://github.com/google/syzkaller) + +#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/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(...) \ + { \ + __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST); \ + if (_setjmp(segv_env) == 0) { \ + __VA_ARGS__; \ + } \ + __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST); \ + } + +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 remove_dir(const char* dir) +{ + DIR* dp = opendir(dir); + if (dp == NULL) + 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; +} + +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 < 5; 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, 45); + 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 < 5 * 1000) + continue; + kill_and_wait(pid, &status); + break; + } + remove_dir(cwdbuf); + } +} + +uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff}; + +void execute_call(int call) +{ + intptr_t res = 0; + switch (call) { + case 0: + NONFAILING(memcpy((void*)0x20000000, ".\000", 2)); + res = syscall(SYS_open, 0x20000000ul, 0ul, 0ul); + if (res != -1) + r[0] = res; + break; + case 1: + res = syscall(SYS_socketpair, 1ul, 2ul, 0, 0x20000100ul); + if (res != -1) + NONFAILING(r[1] = *(uint32_t*)0x20000100); + break; + case 2: + NONFAILING(memcpy( + (void*)0x20000180, + "\x0a\x01\x2e\x2f\x66\x69\x6c\x65\x30\x00\x46\xd3\xc5\xea\xb2\xf9\xd0" + "\x81\x73\xef\x4a\xd0\xe9\x00\x9b\x10\xb2\x6d\x40\xab\xf3\x06\x35\x55" + "\x92\x6b\xa7\x48\x51\xed\xf1\x47\x2a\x1c\x57\xda\x98\x4d\x23\x4f\x6d" + "\x63\x57\x71\x99\x01\x97\x42\xef\xe9\xd6\x91\x78\x55\x43\x7f\x80\x8b" + "\xf3\xfa\x29\xeb\x62\xeb\x2f\x4b\xb5\xcd\x3f\xd7\x4f\x78\x35\xfb\xd3" + "\x24\xe3\xc4\x10\x31\x53\xdd\xe7\x9a\x1c\x23\x36\x48\xe4\x7a\xf8\x3a" + "\x7e\xd0\x1f\x89\xf7\xb6\xee\xff\x69\x1d\xad\x02\x57\x01\xf2\x52\x93" + "\x3e\x6b\xda\x65\x2a\xc7\x6c\x27\xf9\x0a\xd4\x3b\x05\x00\x00\x00\x1b" + "\x1c\x89\xc9\x3b\x41\x9c\x7b\x4f\x31\xbb\x6a\x5c\x17\xed\x78\xf1\x64" + "\xc4\xa3\x17\x5c\x7a\x8c\x02\x75\x00\xaf\x61\xac\x90\x22\x86\x15\x67" + "\x90\x03\x17\x8c\x55\xf6\xb9\x3a\xf8\x6c\xab\xcb\xf1\x74\x09\xc0\xbc" + "\xf4\x5b\x76\x33\x8f\x9a\x76\xf3\x6e", + 196)); + syscall(SYS_bindat, r[0], r[1], 0x20000180ul, 0xaul); + break; + case 3: + NONFAILING(*(uint8_t*)0x20000040 = 0xa); + NONFAILING(*(uint8_t*)0x20000041 = 1); + NONFAILING(memcpy((void*)0x20000042, "./file0\000", 8)); + syscall(SYS_connectat, r[0], r[1], 0x20000040ul, 0xaul); + break; + case 4: + NONFAILING(*(uint8_t*)0x20000000 = 0xa); + NONFAILING(*(uint8_t*)0x20000001 = 1); + NONFAILING(memcpy((void*)0x20000002, "./file0\000", 8)); + syscall(SYS_connect, r[1], 0x20000000ul, 0xaul); + break; + } +} +int main(void) +{ + syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul); + install_segv_handler(); + use_temporary_dir(); + loop(); + return 0; +} +EOF +mycc -o /tmp/syzkaller23 -Wall -Wextra -O0 /tmp/syzkaller23.c -lpthread || + exit 1 + +for i in `jot 256`; do + (cd /tmp; timeout 3m ./syzkaller23) & +done +wait + +rm -rf /tmp/syzkaller23 /tmp/syzkaller23.c /tmp/syzkaller.* +exit 0 |