Date: Mon, 6 Sep 2021 13:32:50 GMT From: Peter Holm <pho@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: c86a43f1c7db - main - stress2: Added a syzkaller reproducer Message-ID: <202109061332.186DWo2U079335@gitrepo.freebsd.org>
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The branch main has been updated by pho: URL: https://cgit.FreeBSD.org/src/commit/?id=c86a43f1c7dbaba4042db017a3c3563f5b826c48 commit c86a43f1c7dbaba4042db017a3c3563f5b826c48 Author: Peter Holm <pho@FreeBSD.org> AuthorDate: 2021-09-06 13:32:23 +0000 Commit: Peter Holm <pho@FreeBSD.org> CommitDate: 2021-09-06 13:32:23 +0000 stress2: Added a syzkaller reproducer --- tools/test/stress2/misc/all.exclude | 1 + tools/test/stress2/misc/syzkaller43.sh | 327 +++++++++++++++++++++++++++++++++ 2 files changed, 328 insertions(+) diff --git a/tools/test/stress2/misc/all.exclude b/tools/test/stress2/misc/all.exclude index 9e9226c28574..d4a57af4d559 100644 --- a/tools/test/stress2/misc/all.exclude +++ b/tools/test/stress2/misc/all.exclude @@ -68,6 +68,7 @@ syzkaller39.sh WiP 20210607 syzkaller40.sh WiP 20210607 syzkaller41.sh WiP 20210607 syzkaller42.sh WiP 20210613 +syzkaller43.sh WiP 20210906 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 diff --git a/tools/test/stress2/misc/syzkaller43.sh b/tools/test/stress2/misc/syzkaller43.sh new file mode 100755 index 000000000000..025ee674132d --- /dev/null +++ b/tools/test/stress2/misc/syzkaller43.sh @@ -0,0 +1,327 @@ +#!/bin/sh + +# panic: Assertion done != job_total_nbytes failed at ../../../kern/sys_socket.c:672 +# cpuid = 6 +# time = 1630912129 +# KDB: stack backtrace: +# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00e4f2fa10 +# vpanic() at vpanic+0x187/frame 0xfffffe00e4f2fa70 +# panic() at panic+0x43/frame 0xfffffe00e4f2fad0 +# soaio_process_sb() at soaio_process_sb+0x79a/frame 0xfffffe00e4f2fb70 +# soaio_kproc_loop() at soaio_kproc_loop+0x96/frame 0xfffffe00e4f2fbb0 +# fork_exit() at fork_exit+0x80/frame 0xfffffe00e4f2fbf0 +# fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00e4f2fbf0 +# --- trap 0, rip = 0, rsp = 0, rbp = 0 --- +# KDB: enter: panic +# [ thread pid 26 tid 100163 ] +# Stopped at kdb_enter+0x37: movq $0,0x127297e(%rip) +# db> x/s version +# version: FreeBSD 14.0-CURRENT #0 main-n249158-1f7a6325fe1b: Sun Sep 5 09:12:58 CEST 2021 +# pho@mercat1.netperf.freebsd.org:/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/syzkaller43.c <<EOF +// https://syzkaller.appspot.com/bug?id=0ecbaedb9a54dd1af01c400dabe774e5c6c6fb6c +// autogenerated by syzkaller (https://github.com/google/syzkaller) +// Reported-by: syzbot+c7d22dbbb9aef509421d@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; + 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); + 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; + } + } +} + +#ifndef SYS_aio_readv +#define SYS_aio_readv 579 +#endif + +uint64_t r[1] = {0xffffffffffffffff}; + +void execute_call(int call) +{ + intptr_t res = 0; + switch (call) { + case 0: + res = syscall(SYS_socket, 0x1cul, 5ul, 0x84); + if (res != -1) + r[0] = res; + break; + case 1: + *(uint64_t*)0x20000440 = 0; + *(uint32_t*)0x20000448 = 0; + *(uint64_t*)0x20000450 = 0; + *(uint64_t*)0x20000458 = 0; + *(uint64_t*)0x20000460 = 0; + *(uint64_t*)0x20000468 = 0; + *(uint32_t*)0x20000470 = 0; + syscall(SYS_recvmsg, r[0], 0x20000440ul, 0x40040ul); + break; + case 2: + *(uint32_t*)0x200006c0 = r[0]; + *(uint64_t*)0x200006c8 = 0x800; + *(uint64_t*)0x200006d0 = 0; + *(uint64_t*)0x200006d8 = 0; + *(uint32_t*)0x200006e0 = -1; + *(uint32_t*)0x200006e4 = 8; + *(uint64_t*)0x200006e8 = 0xffffffffffff658c; + *(uint32_t*)0x200006f0 = 4; + *(uint32_t*)0x200006f4 = 0x1ff; + *(uint64_t*)0x200006f8 = 0x40; + *(uint64_t*)0x20000700 = 0; + *(uint64_t*)0x20000708 = 0; + *(uint32_t*)0x20000710 = 4; + *(uint32_t*)0x20000714 = 8; + *(uint32_t*)0x20000718 = 6; + *(uint64_t*)0x20000720 = 0; + *(uint64_t*)0x20000728 = 0; + syscall(SYS_aio_readv, 0x200006c0ul); + break; + case 3: + *(uint32_t*)0x20000140 = 0; + *(uint16_t*)0x20000144 = 4; + *(uint8_t*)0x20000146 = 1; + syscall(SYS_setsockopt, r[0], 0x84, 0x1e, 0x20000140ul, 8ul); + break; + case 4: + *(uint64_t*)0x20000580 = 0x20000080; + *(uint8_t*)0x20000080 = 0x1c; + *(uint8_t*)0x20000081 = 0x1c; + *(uint16_t*)0x20000082 = htobe16(0x4e22); + *(uint32_t*)0x20000084 = 0; + *(uint64_t*)0x20000088 = htobe64(0); + *(uint64_t*)0x20000090 = htobe64(1); + *(uint32_t*)0x20000098 = 0; + *(uint32_t*)0x20000588 = 0x1c; + *(uint64_t*)0x20000590 = 0x20000400; + *(uint64_t*)0x20000400 = 0x200000c0; + memset((void*)0x200000c0, 239, 1); + *(uint64_t*)0x20000408 = 1; + *(uint32_t*)0x20000598 = 1; + *(uint64_t*)0x200005a0 = 0; + *(uint32_t*)0x200005a8 = 0xd0; + *(uint32_t*)0x200005ac = 0; + syscall(SYS_sendmsg, r[0], 0x20000580ul, 0ul); + break; + } +} +int main(void) +{ + syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul); + loop(); + return 0; +} +EOF +mycc -o /tmp/syzkaller43 -Wall -Wextra -O0 /tmp/syzkaller43.c -lpthread || + exit 1 + +(cd /tmp; timeout 3m ./syzkaller43) + +rm -rf /tmp/syzkaller43 syzkaller43.c /tmp/syzkaller.* +exit 0
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