svn commit: r367864 - user/pho/stress2/misc
Peter Holm
pho at FreeBSD.org
Fri Nov 20 08:07:30 UTC 2020
Author: pho
Date: Fri Nov 20 08:07:29 2020
New Revision: 367864
URL: https://svnweb.freebsd.org/changeset/base/367864
Log:
Added two syzkaller reproducers.
Added:
user/pho/stress2/misc/syzkaller26.sh (contents, props changed)
user/pho/stress2/misc/syzkaller27.sh (contents, props changed)
Added: user/pho/stress2/misc/syzkaller26.sh
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/pho/stress2/misc/syzkaller26.sh Fri Nov 20 08:07:29 2020 (r367864)
@@ -0,0 +1,167 @@
+#!/bin/sh
+
+# panic: Bad link elm 0xfffff8001a83db00 prev->next != elm
+# cpuid = 21
+# time = 1605387390
+# KDB: stack backtrace:
+# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0100a983e0
+# vpanic() at vpanic+0x182/frame 0xfffffe0100a98430
+# panic() at panic+0x43/frame 0xfffffe0100a98490
+# _callout_stop_safe() at _callout_stop_safe+0x726/frame 0xfffffe0100a98520
+# filt_timerdetach() at filt_timerdetach+0x20/frame 0xfffffe0100a98540
+# kqueue_drain() at kqueue_drain+0x2c8/frame 0xfffffe0100a98580
+# kqueue_close() at kqueue_close+0x7d/frame 0xfffffe0100a985c0
+# _fdrop() at _fdrop+0x1b/frame 0xfffffe0100a985e0
+# closef() at closef+0x1ea/frame 0xfffffe0100a98670
+# fdescfree_fds() at fdescfree_fds+0x8c/frame 0xfffffe0100a986d0
+# fdescfree() at fdescfree+0x3cd/frame 0xfffffe0100a987a0
+# exit1() at exit1+0x487/frame 0xfffffe0100a98810
+# sigexit() at sigexit+0x15c/frame 0xfffffe0100a98ae0
+# postsig() at postsig+0x2cc/frame 0xfffffe0100a98bb0
+# ast() at ast+0x5eb/frame 0xfffffe0100a98bf0
+# doreti_ast() at doreti_ast+0x1f/frame 0x7fffffffe570
+# KDB: enter: panic
+# [ thread pid 82279 tid 100717 ]
+# Stopped at kdb_enter+0x37: movq $0,0x10aa7f6(%rip)
+# db> x/s version
+# version: FreeBSD 13.0-CURRENT #0 r367672: Sat Nov 14 08:42:14 CET 2020
+# pho at t2.osted.lan:/usr/src/sys/amd64/compile/PHO
+# db>
+
+# $FreeBSD$
+
+[ `uname -p` != "amd64" ] && exit 0
+
+# Fixed by r367849
+
+. ../default.cfg
+cat > /tmp/syzkaller26.c <<EOF
+// https://syzkaller.appspot.com/bug?id=95ac7e30218c63bc9322b1dd775101f8f88de4ff
+// autogenerated by syzkaller (https://github.com/google/syzkaller)
+// Reported-by: syzbot+1b27e0237aa22d8adffa at syzkaller.appspotmail.com
+
+#define _GNU_SOURCE
+
+#include <sys/types.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 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 < 5 * 1000)
+ continue;
+ kill_and_wait(pid, &status);
+ break;
+ }
+ }
+}
+
+uint64_t r[1] = {0xffffffffffffffff};
+
+void execute_one(void)
+{
+ intptr_t res = 0;
+ res = syscall(SYS_kqueue);
+ if (res != -1)
+ r[0] = res;
+ *(uint64_t*)0x20000000 = 3;
+ *(uint16_t*)0x20000008 = 0xfff3;
+ *(uint16_t*)0x2000000a = 0x4000;
+ *(uint32_t*)0x2000000c = 0x1000000;
+ *(uint64_t*)0x20000010 = 0xe;
+ *(uint64_t*)0x20000018 = 0xff;
+ *(uint64_t*)0x20000020 = 2;
+ *(uint64_t*)0x20000028 = 2;
+ *(uint64_t*)0x20000030 = 4;
+ *(uint64_t*)0x20000038 = 0xffffffffffffff90;
+ *(uint64_t*)0x20000040 = 0x101;
+ *(uint16_t*)0x20000048 = 0xfff6;
+ *(uint16_t*)0x2000004a = 0x22;
+ *(uint32_t*)0x2000004c = 0x20;
+ *(uint64_t*)0x20000050 = 0xe1;
+ *(uint64_t*)0x20000058 = -1;
+ *(uint64_t*)0x20000060 = 0x81;
+ *(uint64_t*)0x20000068 = 4;
+ *(uint64_t*)0x20000070 = 0x8000;
+ *(uint64_t*)0x20000078 = 9;
+ *(uint64_t*)0x20000080 = 0;
+ *(uint16_t*)0x20000088 = 0xfff9;
+ *(uint16_t*)0x2000008a = 0xefc9;
+ *(uint32_t*)0x2000008c = 4;
+ *(uint64_t*)0x20000090 = 0;
+ *(uint64_t*)0x20000098 = 0x400;
+ *(uint64_t*)0x200000a0 = 0x2e77;
+ *(uint64_t*)0x200000a8 = 2;
+ *(uint64_t*)0x200000b0 = 0x7fffffff;
+ *(uint64_t*)0x200000b8 = 7;
+ syscall(SYS_kevent, r[0], 0x20000000ul, 3ul, 0x200000c0ul, 9ul, 0ul);
+}
+int main(void)
+{
+ syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
+ loop();
+ return 0;
+}
+EOF
+mycc -o /tmp/syzkaller26 -Wall -Wextra -O0 /tmp/syzkaller26.c ||
+ exit 1
+
+(cd ../testcases/swap; ./swap -t 1m -i 20 -h > /dev/null 2>&1) &
+for i in `jot 256`; do
+ (cd /tmp; timeout 3m ./syzkaller26) &
+done
+wait
+
+rm -rf /tmp/syzkaller26 syzkaller26.c /tmp/syzkaller.*
+exit 0
Added: user/pho/stress2/misc/syzkaller27.sh
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/pho/stress2/misc/syzkaller27.sh Fri Nov 20 08:07:29 2020 (r367864)
@@ -0,0 +1,151 @@
+#!/bin/sh
+
+# panic: Bad tailq NEXT(0xffffffff81cb0ba0->tqh_last) != NULL
+# cpuid = 0
+# time = 1605424954
+# KDB: stack backtrace:
+# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe010125c2e0
+# vpanic() at vpanic+0x182/frame 0xfffffe010125c330
+# panic() at panic+0x43/frame 0xfffffe010125c390
+# callout_process() at callout_process+0x34f/frame 0xfffffe010125c400
+# handleevents() at handleevents+0x185/frame 0xfffffe010125c440
+# timercb() at timercb+0x196/frame 0xfffffe010125c490
+# lapic_handle_timer() at lapic_handle_timer+0x9b/frame 0xfffffe010125c4c0
+# Xtimerint() at Xtimerint+0xb1/frame 0xfffffe010125c4c0
+# --- interrupt, rip = 0xffffffff80c56c69, rsp = 0xfffffe010125c590, rbp = 0xfffffe010125c5c0 ---
+# witness_unlock() at witness_unlock+0x79/frame 0xfffffe010125c5c0
+# __mtx_unlock_flags() at __mtx_unlock_flags+0x4d/frame 0xfffffe010125c5f0
+# kqueue_register() at kqueue_register+0x9e3/frame 0xfffffe010125c680
+# kqueue_kevent() at kqueue_kevent+0x106/frame 0xfffffe010125c950
+# kern_kevent_fp() at kern_kevent_fp+0x95/frame 0xfffffe010125c9a0
+# kern_kevent() at kern_kevent+0x80/frame 0xfffffe010125ca00
+# kern_kevent_generic() at kern_kevent_generic+0x70/frame 0xfffffe010125ca60
+# sys_kevent() at sys_kevent+0x61/frame 0xfffffe010125cac0
+# amd64_syscall() at amd64_syscall+0x144/frame 0xfffffe010125cbf0
+# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe010125cbf0
+# --- syscall (0, FreeBSD ELF64, nosys), rip = 0x800380c6a, rsp = 0x7fffffffe4d8, rbp = 0x7fffffffe500 ---
+# KDB: enter: panic
+# [ thread pid 36082 tid 144846 ]
+# Stopped at kdb_enter+0x37: movq $0,0x10aa7f6(%rip)
+# db> x/s version
+# version: FreeBSD 13.0-CURRENT #0 r367672: Sat Nov 14 08:42:14 CET 2020
+# pho at t2.osted.lan:/usr/src/sys/amd64/compile/PHO
+# db>
+
+# $FreeBSD$
+
+[ `uname -p` != "amd64" ] && exit 0
+
+# Fixed by r367849
+
+. ../default.cfg
+cat > /tmp/syzkaller27.c <<EOF
+// https://syzkaller.appspot.com/bug?id=6b64d673525304a89af91e0db71f2dee8e8da0f7
+// autogenerated by syzkaller (https://github.com/google/syzkaller)
+// Reported-by: syzbot+79569cd4d76636b2cc1c at syzkaller.appspotmail.com
+
+#define _GNU_SOURCE
+
+#include <sys/types.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 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 < 5 * 1000)
+ continue;
+ kill_and_wait(pid, &status);
+ break;
+ }
+ }
+}
+
+uint64_t r[1] = {0xffffffffffffffff};
+
+void execute_one(void)
+{
+ intptr_t res = 0;
+ res = syscall(SYS_kqueue);
+ if (res != -1)
+ r[0] = res;
+ *(uint64_t*)0x200000c0 = 0;
+ *(uint16_t*)0x200000c8 = 0xfff9;
+ *(uint16_t*)0x200000ca = 0x4001;
+ *(uint32_t*)0x200000cc = 4;
+ *(uint64_t*)0x200000d0 = 0;
+ *(uint64_t*)0x200000d8 = 0;
+ *(uint64_t*)0x200000e0 = 0;
+ *(uint64_t*)0x200000e8 = 0;
+ *(uint64_t*)0x200000f0 = 0;
+ *(uint64_t*)0x200000f8 = 0;
+ syscall(SYS_kevent, r[0], 0x200000c0ul, 1ul, 0ul, 0ul, 0ul);
+}
+int main(void)
+{
+ syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
+ loop();
+ return 0;
+}
+EOF
+mycc -o /tmp/syzkaller27 -Wall -Wextra -O0 /tmp/syzkaller27.c ||
+ exit 1
+
+(cd ../testcases/swap; ./swap -t 1m -i 20 -h > /dev/null 2>&1) &
+for i in `jot 256`; do
+ (cd /tmp; timeout 3m ./syzkaller27) &
+done
+wait
+
+rm -rf /tmp/syzkaller27 syzkaller27.c /tmp/syzkaller.*
+exit 0
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