git: cbc3ecb7ef08 - main - stress2: Added two syzkaller reproducers
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Date: Tue, 26 Oct 2021 09:59:39 UTC
The branch main has been updated by pho:
URL: https://cgit.FreeBSD.org/src/commit/?id=cbc3ecb7ef08a2978d42b384a49d3456b0ba0a32
commit cbc3ecb7ef08a2978d42b384a49d3456b0ba0a32
Author: Peter Holm <pho@FreeBSD.org>
AuthorDate: 2021-10-26 09:59:04 +0000
Commit: Peter Holm <pho@FreeBSD.org>
CommitDate: 2021-10-26 09:59:04 +0000
stress2: Added two syzkaller reproducers
---
tools/test/stress2/misc/all.exclude | 2 +
tools/test/stress2/misc/syzkaller46.sh | 118 ++++++++++
tools/test/stress2/misc/syzkaller47.sh | 404 +++++++++++++++++++++++++++++++++
3 files changed, 524 insertions(+)
diff --git a/tools/test/stress2/misc/all.exclude b/tools/test/stress2/misc/all.exclude
index 7ee33f258f87..dfd936abde70 100644
--- a/tools/test/stress2/misc/all.exclude
+++ b/tools/test/stress2/misc/all.exclude
@@ -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
diff --git a/tools/test/stress2/misc/syzkaller46.sh b/tools/test/stress2/misc/syzkaller46.sh
new file mode 100755
index 000000000000..db1c9c27b221
--- /dev/null
+++ b/tools/test/stress2/misc/syzkaller46.sh
@@ -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
diff --git a/tools/test/stress2/misc/syzkaller47.sh b/tools/test/stress2/misc/syzkaller47.sh
new file mode 100755
index 000000000000..76561282a86b
--- /dev/null
+++ b/tools/test/stress2/misc/syzkaller47.sh
@@ -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