diff options
Diffstat (limited to 'tools/test/stress2/misc/syzkaller41.sh')
| -rwxr-xr-x | tools/test/stress2/misc/syzkaller41.sh | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/tools/test/stress2/misc/syzkaller41.sh b/tools/test/stress2/misc/syzkaller41.sh new file mode 100755 index 000000000000..762f155e33bf --- /dev/null +++ b/tools/test/stress2/misc/syzkaller41.sh @@ -0,0 +1,284 @@ +#!/bin/sh + +# Fatal trap 12: page fault while in kernel mode +# cpuid = 23; apic id = 2b +# fault virtual address = 0x0 +# fault code = supervisor read instruction, page not present +# instruction pointer = 0x20:0x0 +# stack pointer = 0x28:0xfffffe0131d05b78 +# frame pointer = 0x28:0xfffffe0131d05bb0 +# 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 = 35 (soaiod1) +# trap number = 12 +# panic: page fault +# cpuid = 23 +# time = 1622994049 +# KDB: stack backtrace: +# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0131d05820 +# vpanic() at vpanic+0x181/frame 0xfffffe0131d05870 +# panic() at panic+0x43/frame 0xfffffe0131d058d0 +# trap_fatal() at trap_fatal+0x387/frame 0xfffffe0131d05930 +# trap_pfault() at trap_pfault+0x97/frame 0xfffffe0131d05990 +# trap() at trap+0x294/frame 0xfffffe0131d05aa0 +# calltrap() at calltrap+0x8/frame 0xfffffe0131d05aa0 +# --- trap 0xc, rip = 0, rsp = 0xfffffe0131d05b78, rbp = 0xfffffe0131d05bb0 --- +# ??() at 0/frame 0xfffffe0131d05bb0 +# fork_exit() at fork_exit+0x80/frame 0xfffffe0131d05bf0 +# fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0131d05bf0 +# --- trap 0, rip = 0, rsp = 0, rbp = 0 --- +# KDB: enter: panic +# [ thread pid 35 tid 100272 ] +# Stopped at kdb_enter+0x37: movq $0,0x127fb8e(%rip) +# db> x/s version +# version: FreeBSD 14.0-CURRENT #0 main-n247181-1b5bc3a54b6: Sat Jun 5 04:12:19 CEST 2021 +# pho@t2.osted.lan:/usr/src/sys/amd64/compile/PHO +# db> + +[ `uname -p` != "amd64" ] && exit 0 +[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 + +. ../default.cfg +cat > /tmp/syzkaller41.c <<EOF +// https://syzkaller.appspot.com/bug?id=4996122a5963dbffd94839880a22e4e51575ec42 +// autogenerated by syzkaller (https://github.com/google/syzkaller) +// Reported-by: syzbot+104d8ee3430361cb2795@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 < 4; 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, 0x1cul, 1ul, 0); + if (res != -1) + r[0] = res; + break; + case 1: + *(uint32_t*)0x20000300 = r[0]; + *(uint64_t*)0x20000308 = 0x9a6; + *(uint64_t*)0x20000310 = 0; + *(uint64_t*)0x20000318 = 0; + *(uint32_t*)0x20000320 = 0xffe; + *(uint32_t*)0x20000324 = 0x100; + *(uint64_t*)0x20000328 = 0x2b8; + *(uint32_t*)0x20000330 = 4; + *(uint32_t*)0x20000334 = 0xfff; + *(uint64_t*)0x20000338 = 3; + *(uint64_t*)0x20000340 = 0x80000001; + *(uint64_t*)0x20000348 = 0; + *(uint32_t*)0x20000350 = 4; + *(uint32_t*)0x20000354 = 0xb; + *(uint64_t*)0x20000358 = 9; + *(uint64_t*)0x20000360 = 0xa3c5; + *(uint64_t*)0x20000368 = 0xfffffffffffffff7; + *(uint64_t*)0x20000370 = 0x8000; + *(uint64_t*)0x20000378 = 3; + *(uint64_t*)0x20000380 = 0x498c; + *(uint64_t*)0x20000388 = 8; + *(uint64_t*)0x20000390 = 4; + *(uint64_t*)0x20000398 = 3; + syscall(SYS_aio_read, 0x20000300ul); + break; + case 2: + *(uint8_t*)0x20000000 = 0x1c; + *(uint8_t*)0x20000001 = 0x1c; + *(uint16_t*)0x20000002 = htobe16(0x4e21); + *(uint32_t*)0x20000004 = 0; + *(uint8_t*)0x20000008 = 0xfe; + *(uint8_t*)0x20000009 = 0x80; + memset((void*)0x2000000a, 0, 12); + *(uint8_t*)0x20000016 = 0; + *(uint8_t*)0x20000017 = 0xaa; + *(uint32_t*)0x20000018 = 1; + syscall(SYS_connect, r[0], 0x20000000ul, 0x1cul); + break; + case 3: + syscall(SYS_shutdown, r[0], 0ul); + break; + } +} +int main(void) +{ + syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul); + loop(); + return 0; +} +EOF +mycc -o /tmp/syzkaller41 -Wall -Wextra -O0 /tmp/syzkaller41.c -lpthread || + exit 1 + +(cd /tmp; timeout 3m ./syzkaller41) + +rm -rf /tmp/syzkaller41 syzkaller41.c /tmp/syzkaller.* +exit 0 |