git: 6d5586da633b - main - stress2: Added two syzkaller reproducers.
Peter Holm
pho at FreeBSD.org
Mon Mar 22 10:27:40 UTC 2021
The branch main has been updated by pho:
URL: https://cgit.FreeBSD.org/src/commit/?id=6d5586da633bc76d02010ef73c9be768de98966c
commit 6d5586da633bc76d02010ef73c9be768de98966c
Author: Peter Holm <pho at FreeBSD.org>
AuthorDate: 2021-03-22 10:26:39 +0000
Commit: Peter Holm <pho at FreeBSD.org>
CommitDate: 2021-03-22 10:26:39 +0000
stress2: Added two syzkaller reproducers.
---
tools/test/stress2/misc/syzkaller31.sh | 324 +++++++++++++++++++++++++++++++++
tools/test/stress2/misc/syzkaller32.sh | 299 ++++++++++++++++++++++++++++++
2 files changed, 623 insertions(+)
diff --git a/tools/test/stress2/misc/syzkaller31.sh b/tools/test/stress2/misc/syzkaller31.sh
new file mode 100755
index 000000000000..af93a89a127c
--- /dev/null
+++ b/tools/test/stress2/misc/syzkaller31.sh
@@ -0,0 +1,324 @@
+#!/bin/sh
+
+# panic: Bad tailq NEXT(0xfffffe0079608f00->tqh_last) != NULL
+# cpuid = 20
+# time = 1616404997
+# KDB: stack backtrace:
+# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe01af6d8580
+# vpanic() at vpanic+0x181/frame 0xfffffe01af6d85d0
+# panic() at panic+0x43/frame 0xfffffe01af6d8630
+# sctp_ss_default_add() at sctp_ss_default_add+0xd7/frame 0xfffffe01af6d8660
+# sctp_lower_sosend() at sctp_lower_sosend+0x3b24/frame 0xfffffe01af6d8830
+# sctp_sosend() at sctp_sosend+0x344/frame 0xfffffe01af6d8950
+# sosend() at sosend+0x66/frame 0xfffffe01af6d8980
+# kern_sendit() at kern_sendit+0x1ec/frame 0xfffffe01af6d8a10
+# sendit() at sendit+0x1db/frame 0xfffffe01af6d8a60
+# sys_sendmsg() at sys_sendmsg+0x61/frame 0xfffffe01af6d8ac0
+# amd64_syscall() at amd64_syscall+0x147/frame 0xfffffe01af6d8bf0
+# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe01af6d8bf0
+# --- syscall (0, FreeBSD ELF64, nosys), rip = 0x8003b042a, rsp = 0x7fffdffdcf68, rbp = 0x7fffdffdcf90 ---
+# KDB: enter: panic
+# [ thread pid 7402 tid 730532 ]
+# Stopped at kdb_enter+0x37: movq $0,0x1286f8e(%rip)
+# db> x/s version
+# version: FreeBSD 14.0-CURRENT #0 main-n245565-25bfa448602: Mon Mar 22 09:13:03 CET 2021
+# pho at t2.osted.lan:/usr/src/sys/amd64/compile/PHO\012
+# db>
+
+[ `uname -p` != "amd64" ] && exit 0
+
+. ../default.cfg
+kldstat -v | grep -q sctp || kldload sctp.ko
+
+cat > /tmp/syzkaller31.c <<EOF
+// https://syzkaller.appspot.com/bug?id=57c78914e36b822eaa173cfd681e4f63822e0844
+// autogenerated by syzkaller (https://github.com/google/syzkaller)
+// Reported-by: syzbot+ed6e8de942351d0309f4 at 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;
+ int collide = 0;
+again:
+ for (call = 0; call < 3; 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++) {
+ 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;
+ }
+ }
+}
+
+uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};
+
+void execute_call(int call)
+{
+ intptr_t res = 0;
+ switch (call) {
+ case 0:
+ res = syscall(SYS_socket, 2ul, 5ul, 0x84);
+ if (res != -1)
+ r[0] = res;
+ break;
+ case 1:
+ res = syscall(SYS_fcntl, r[0], 0ul, r[0]);
+ if (res != -1)
+ r[1] = res;
+ break;
+ case 2:
+ *(uint64_t*)0x20000040 = 0x20000000;
+ *(uint8_t*)0x20000000 = 0x1c;
+ *(uint8_t*)0x20000001 = 0x1c;
+ *(uint16_t*)0x20000002 = htobe16(0x4e22);
+ *(uint32_t*)0x20000004 = 0;
+ *(uint8_t*)0x20000008 = 0;
+ *(uint8_t*)0x20000009 = 0;
+ *(uint8_t*)0x2000000a = 0;
+ *(uint8_t*)0x2000000b = 0;
+ *(uint8_t*)0x2000000c = 0;
+ *(uint8_t*)0x2000000d = 0;
+ *(uint8_t*)0x2000000e = 0;
+ *(uint8_t*)0x2000000f = 0;
+ *(uint8_t*)0x20000010 = 0;
+ *(uint8_t*)0x20000011 = 0;
+ *(uint8_t*)0x20000012 = -1;
+ *(uint8_t*)0x20000013 = -1;
+ *(uint32_t*)0x20000014 = htobe32(0x203);
+ *(uint32_t*)0x20000018 = 0;
+ *(uint32_t*)0x20000048 = 0x1c;
+ *(uint64_t*)0x20000050 = 0x20000100;
+ *(uint64_t*)0x20000100 = 0x20000080;
+ memcpy((void*)0x20000080, "\000", 1);
+ *(uint64_t*)0x20000108 = 1;
+ *(uint32_t*)0x20000058 = 1;
+ *(uint64_t*)0x20000060 = 0x20000200;
+ memcpy(
+ (void*)0x20000200,
+ "\x1c\x00\x00\x00\x84\x00\x00\x00\x01\x00\x00\x00\x40\x08\xec\x70\xa0",
+ 17);
+ *(uint32_t*)0x20000068 = 0x1c;
+ *(uint32_t*)0x2000006c = 0;
+ syscall(SYS_sendmsg, r[1], 0x20000040ul, 0ul);
+ break;
+ }
+}
+int main(void)
+{
+ syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
+ loop();
+ return 0;
+}
+EOF
+mycc -o /tmp/syzkaller31 -Wall -Wextra -O0 /tmp/syzkaller31.c -lpthread ||
+ exit 1
+
+(cd ../testcases/swap; ./swap -t 1m -i 20 -h > /dev/null 2>&1) &
+(cd /tmp; timeout 3m ./syzkaller31)
+while pkill swap; do :; done
+wait
+
+rm -rf /tmp/syzkaller31 syzkaller31.c /tmp/syzkaller.*
+exit 0
diff --git a/tools/test/stress2/misc/syzkaller32.sh b/tools/test/stress2/misc/syzkaller32.sh
new file mode 100755
index 000000000000..a95871969d5c
--- /dev/null
+++ b/tools/test/stress2/misc/syzkaller32.sh
@@ -0,0 +1,299 @@
+#!/bin/sh
+
+# Fatal trap 18: integer divide fault while in kernel mode
+# cpuid = 0; apic id = 00
+# instruction pointer = 0x20:0xffffffff80c2f828
+# stack pointer = 0x0:0xfffffe0131a5d9e0
+# frame pointer = 0x0:0xfffffe0131a5da30
+# 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 = 12 (swi4: clock (0))
+# trap number = 18
+# panic: integer divide fault
+# cpuid = 0
+# time = 1616401924
+# KDB: stack backtrace:
+# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0131a5d6f0
+# vpanic() at vpanic+0x181/frame 0xfffffe0131a5d740
+# panic() at panic+0x43/frame 0xfffffe0131a5d7a0
+# trap_fatal() at trap_fatal+0x387/frame 0xfffffe0131a5d800
+# trap() at trap+0xa4/frame 0xfffffe0131a5d910
+# calltrap() at calltrap+0x8/frame 0xfffffe0131a5d910
+# --- trap 0x12, rip = 0xffffffff80c2f828, rsp = 0xfffffe0131a5d9e0, rbp = 0xfffffe0131a5da30 ---
+# realtimer_expire() at realtimer_expire+0x1a8/frame 0xfffffe0131a5da30
+# softclock_call_cc() at softclock_call_cc+0x15d/frame 0xfffffe0131a5db00
+# softclock() at softclock+0x66/frame 0xfffffe0131a5db20
+# ithread_loop() at ithread_loop+0x279/frame 0xfffffe0131a5dbb0
+# fork_exit() at fork_exit+0x80/frame 0xfffffe0131a5dbf0
+# fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0131a5dbf0
+# --- trap 0, rip = 0, rsp = 0, rbp = 0 ---
+# KDB: enter: panic
+# [ thread pid 12 tid 100160 ]
+# Stopped at kdb_enter+0x37: movq $0,0x1286f8e(%rip)
+# db> x/s version
+# version: FreeBSD 14.0-CURRENT #0 main-n245565-25bfa448602: Mon Mar 22 09:13:03 CET 2021
+# pho at t2.osted.lan:/usr/src/sys/amd64/compile/PHO\012
+# db>
+
+[ `uname -p` != "amd64" ] && exit 0
+
+. ../default.cfg
+cat > /tmp/syzkaller32.c <<EOF
+// https://syzkaller.appspot.com/bug?id=02c1b7d91203fd30b386eb023d4a99d1494de733
+// autogenerated by syzkaller (https://github.com/google/syzkaller)
+// Reported-by: syzbot+157b74ff493140d86eac at 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 unsigned long long procid;
+
+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;
+ }
+ }
+}
+
+uint64_t r[1] = {0x0};
+
+void execute_call(int call)
+{
+ intptr_t res = 0;
+ switch (call) {
+ case 0:
+ res = syscall(SYS_ktimer_create, 4ul, 0ul, 0x20000500ul);
+ if (res != -1)
+ r[0] = *(uint32_t*)0x20000500;
+ break;
+ case 1:
+ *(uint64_t*)0x20000100 = 0x200000000000000;
+ *(uint64_t*)0x20000108 = 0;
+ *(uint64_t*)0x20000110 = 0;
+ *(uint64_t*)0x20000118 = 0x10000;
+ syscall(SYS_ktimer_settime, r[0], 0ul, 0x20000100ul, 0ul);
+ break;
+ }
+}
+int main(void)
+{
+ syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
+ for (procid = 0; procid < 4; procid++) {
+ if (fork() == 0) {
+ loop();
+ }
+ }
+ sleep(1000000);
+ return 0;
+}
+EOF
+mycc -o /tmp/syzkaller32 -Wall -Wextra -O0 /tmp/syzkaller32.c -lpthread ||
+ exit 1
+
+(cd ../testcases/swap; ./swap -t 1m -i 20 -h > /dev/null 2>&1) &
+(cd /tmp; timeout 3m ./syzkaller32)
+while pkill swap; do :; done
+wait
+
+rm -rf /tmp/syzkaller32 syzkaller32.c /tmp/syzkaller.*
+exit 0
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