git: 5b42ac2914b5 - main - stress2: Added two syzkaller reproducers
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Date: Wed, 21 Sep 2022 05:42:35 UTC
The branch main has been updated by pho:
URL: https://cgit.FreeBSD.org/src/commit/?id=5b42ac2914b5585808699c187293059b0a76313e
commit 5b42ac2914b5585808699c187293059b0a76313e
Author: Peter Holm <pho@FreeBSD.org>
AuthorDate: 2022-09-21 05:40:47 +0000
Commit: Peter Holm <pho@FreeBSD.org>
CommitDate: 2022-09-21 05:40:47 +0000
stress2: Added two syzkaller reproducers
---
tools/test/stress2/misc/syzkaller61.sh | 319 +++++++++++++++++++++++++++++++++
tools/test/stress2/misc/syzkaller62.sh | 83 +++++++++
2 files changed, 402 insertions(+)
diff --git a/tools/test/stress2/misc/syzkaller61.sh b/tools/test/stress2/misc/syzkaller61.sh
new file mode 100755
index 000000000000..e150843dc380
--- /dev/null
+++ b/tools/test/stress2/misc/syzkaller61.sh
@@ -0,0 +1,319 @@
+#!/bin/sh
+
+# Seen:
+# [root@mercat1 /usr/src/tools/test/stress2/misc]# pgrep syzkaller61 | xargs procstat -k
+# PID TID COMM TDNAME KSTACK
+# 13332 106396 syzkaller61 - mi_switch thread_suspend_check ast_suspend ast_handler ast doreti_ast
+# 13332 560662 syzkaller61 - mi_switch sleepq_switch sleepq_catch_signals sleepq_wait_sig _sleep umtxq_sleep do_wait __umtx_op_wait_uint_private sys__umtx_op amd64_syscall fast_syscall_common
+# 13332 560776 syzkaller61 - mi_switch thread_suspend_switch thread_single fork1 sys_rfork amd64_syscall fast_syscall_common
+# 13662 356440 syzkaller61 - mi_switch thread_suspend_check ast_suspend ast_handler ast doreti_ast
+# 13662 561098 syzkaller61 - mi_switch sleepq_switch sleepq_catch_signals sleepq_wait_sig _sleep umtxq_sleep do_wait __umtx_op_wait_uint_private sys__umtx_op amd64_syscall fast_syscall_common
+# 13662 561160 syzkaller61 - mi_switch thread_suspend_switch thread_single fork1 sys_rfork amd64_syscall fast_syscall_common
+# [root@mercat1 /usr/src/tools/test/stress2/misc]#
+
+[ `uname -p` != "amd64" ] && exit 0
+
+. ../default.cfg
+cat > /tmp/syzkaller61.c <<EOF
+// https://syzkaller.appspot.com/bug?id=00d8ca63243899ffb67b15ec93aee4ffa2f06637
+// autogenerated by syzkaller (https://github.com/google/syzkaller)
+// Reported-by: syzbot+647212368c3f32c6f13f@syzkaller.appspotmail.com
+
+#define _GNU_SOURCE
+
+#include <sys/types.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/syscall.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+
+static __thread int clone_ongoing;
+static __thread int skip_segv;
+static __thread jmp_buf segv_env;
+
+static void segv_handler(int sig, siginfo_t* info, void* ctx __unused)
+{
+ if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) {
+ exit(sig);
+ }
+ 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 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;
+ }
+ }
+}
+
+void execute_call(int call)
+{
+ switch (call) {
+ case 0:
+ NONFAILING(*(uint32_t*)0x20001f00 = 0x16);
+ NONFAILING(*(uint32_t*)0x20001f04 = 0);
+ NONFAILING(*(uint32_t*)0x20001f08 = 0);
+ NONFAILING(*(uint32_t*)0x20001f0c = 0);
+ NONFAILING(*(uint32_t*)0x20001f10 = 0);
+ NONFAILING(memset((void*)0x20001f14, 0, 60));
+ syscall(SYS_procctl, 0ul, 0, 6ul, 0x20001f00ul);
+ break;
+ case 1:
+ syscall(SYS_rfork, 0x85000ul);
+ break;
+ }
+}
+int main(void)
+{
+ syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
+ install_segv_handler();
+ loop();
+ return 0;
+}
+EOF
+mycc -o /tmp/syzkaller61 -Wall -Wextra -O0 /tmp/syzkaller61.c -lpthread ||
+ exit 1
+
+(cd ../testcases/swap; ./swap -t 3m -i 10 -l 100 > /dev/null 2>&1) &
+for i in `jot 300`; do
+ (cd /tmp; timeout -k 3s 2s ./syzkaller61) &
+ pids="$pids $!"
+done
+sleep 5
+pkill -9 syzkaller61 swap; sleep 1
+pgrep -q syzkaller61 && { pgrep syzkaller61 | xargs ps -lHp; exit 1; }
+for pid in $pids; do
+ wait $pid
+done
+while pkill swap; do :; done
+wait
+
+rm -rf /tmp/syzkaller61 /tmp/syzkaller61.c /tmp/syzkaller61.core \
+ /tmp/syzkaller.??????
+exit 0
diff --git a/tools/test/stress2/misc/syzkaller62.sh b/tools/test/stress2/misc/syzkaller62.sh
new file mode 100755
index 000000000000..aa2d33ebaf9e
--- /dev/null
+++ b/tools/test/stress2/misc/syzkaller62.sh
@@ -0,0 +1,83 @@
+#!/bin/sh
+
+# panic: Assertion sb->sb_hiwat >= sb->uxdg_cc failed at ../../../kern/uipc_usrreq.c:1099
+# cpuid = 9
+# time = 1660909804
+# KDB: stack backtrace:
+# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe01401e7970
+# vpanic() at vpanic+0x151/frame 0xfffffe01401e79c0
+# panic() at panic+0x43/frame 0xfffffe01401e7a20
+# uipc_dgram_sbspace() at uipc_dgram_sbspace+0x51/frame 0xfffffe01401e7a30
+# uipc_sosend_dgram() at uipc_sosend_dgram+0x690/frame 0xfffffe01401e7ac0
+# sosend() at sosend+0x49/frame 0xfffffe01401e7af0
+# soo_write() at soo_write+0x43/frame 0xfffffe01401e7b20
+# filemon_close_log() at filemon_close_log+0xd5/frame 0xfffffe01401e7b90
+# filemon_dtr() at filemon_dtr+0x31/frame 0xfffffe01401e7bb0
+# devfs_destroy_cdevpriv() at devfs_destroy_cdevpriv+0xab/frame 0xfffffe01401e7bd0
+# devfs_close_f() at devfs_close_f+0x64/frame 0xfffffe01401e7c00
+# _fdrop() at _fdrop+0x1b/frame 0xfffffe01401e7c20
+# closef() at closef+0x1db/frame 0xfffffe01401e7cb0
+# fdescfree() at fdescfree+0x433/frame 0xfffffe01401e7d80
+# exit1() at exit1+0x4df/frame 0xfffffe01401e7df0
+# sys_exit() at sys_exit+0xd/frame 0xfffffe01401e7e00
+# amd64_syscall() at amd64_syscall+0x145/frame 0xfffffe01401e7f30
+# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe01401e7f30
+# --- syscall (1, FreeBSD ELF64, sys_exit), rip = 0x82301d16a, rsp = 0x8209bf628, rbp = 0x8209bf640 ---
+# KDB: enter: panic
+# [ thread pid 2876 tid 100222 ]
+# Stopped at x32: movq $0,0x12a1323(%rip)
+# db> x/s version
+# version: FreeBSD 14.0-CURRENT #0 main-n257506-eed634d113d-dirty: Thu Aug 18 13:56:53 CEST 2022
+# pho@mercat1.netperf.freebsd.org:/usr/src/sys/amd64/compile/PHO\012
+# db>
+
+. ../default.cfg
+cat > /tmp/syzkaller62.c <<EOF
+// https://syzkaller.appspot.com/bug?id=582310beb894769fc836748eec49b8d2f905e5ef
+// autogenerated by syzkaller (https://github.com/google/syzkaller)
+// Reported-by: syzbot+6e8be1ec8d77578a3df4@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[2] = {0xffffffffffffffff, 0xffffffffffffffff};
+
+int main(void)
+{
+ syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
+ intptr_t res = 0;
+ memcpy((void*)0x20000040, "/dev/filemon\000", 13);
+ res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x20000040ul, 0ul, 0ul);
+ if (res != -1)
+ r[0] = res;
+ res = syscall(SYS_socketpair, 1ul, 2ul, 0, 0x20000080ul);
+ if (res != -1)
+ r[1] = *(uint32_t*)0x20000084;
+ *(uint32_t*)0x200000c0 = r[1];
+ syscall(SYS_ioctl, r[0], 0xc0045301ul, 0x200000c0ul);
+ *(uint32_t*)0x20000040 = 3;
+ syscall(SYS_setsockopt, r[1], 0xffff, 0x1001, 0x20000040ul, 4ul);
+ return 0;
+}
+EOF
+mycc -o /tmp/syzkaller62 -Wall -Wextra -O0 /tmp/syzkaller62.c || exit 1
+
+kldstat | grep -q filemon || { kldload filemon.ko && loaded=1; }
+
+(cd /tmp; timeout -k 3s 2s ./syzkaller62)
+
+rm -rf /tmp/syzkaller62 /tmp/syzkaller62.c /tmp/syzkaller62.core \
+ /tmp/syzkaller.??????
+# Unload causes: Fatal trap 12: page fault while in kernel mode
+#[ $loaded ] && kldunload -f filemon.ko
+exit 0