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authorPeter Holm <pho@FreeBSD.org>2021-04-18 05:19:07 +0000
committerPeter Holm <pho@FreeBSD.org>2021-04-18 05:19:07 +0000
commit7f014be5eaceffd16f194e9c3b585fe194fb189f (patch)
tree36836e2e2c34d9c21038779c936764a71badfc5b /tools
parent55fc118be8f0cd20e2123cfd2728c5f32317a9fa (diff)
downloadsrc-7f014be5eaceffd16f194e9c3b585fe194fb189f.tar.gz
src-7f014be5eaceffd16f194e9c3b585fe194fb189f.zip
stress2: Added a syzkaller reproducer. A variation of syzkaller32.sh
Diffstat (limited to 'tools')
-rw-r--r--tools/test/stress2/misc/all.exclude1
-rwxr-xr-xtools/test/stress2/misc/syzkaller33.sh142
2 files changed, 143 insertions, 0 deletions
diff --git a/tools/test/stress2/misc/all.exclude b/tools/test/stress2/misc/all.exclude
index 1c5926ac9447..50e4d0ecc77b 100644
--- a/tools/test/stress2/misc/all.exclude
+++ b/tools/test/stress2/misc/all.exclude
@@ -71,6 +71,7 @@ syzkaller29.sh May change policy for random threads to to domainset_fixed 20210
syzkaller30.sh May change policy for random threads to to domainset_fixed 20210104
syzkaller31.sh panic: Bad tailq NEXT(0xfffffe0079608f00->tqh_last) != NULL 20210322
syzkaller32.sh Fatal trap 18: integer divide fault while in kernel mode 20210322
+syzkaller33.sh Fatal trap 18: integer divide fault while in kernel mode 20210418
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/syzkaller33.sh b/tools/test/stress2/misc/syzkaller33.sh
new file mode 100755
index 000000000000..c416d0cde1e4
--- /dev/null
+++ b/tools/test/stress2/misc/syzkaller33.sh
@@ -0,0 +1,142 @@
+#!/bin/sh
+
+# Fatal trap 18: integer divide fault while in kernel mode
+# cpuid = 0; apic id = 00
+# instruction pointer = 0x20:0xffffffff80c310ee
+# stack pointer = 0x28:0xfffffe0131a629e0
+# frame pointer = 0x28:0xfffffe0131a62a30
+# 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 = 1618722013
+# KDB: stack backtrace:
+# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0131a626f0
+# vpanic() at vpanic+0x181/frame 0xfffffe0131a62740
+# panic() at panic+0x43/frame 0xfffffe0131a627a0
+# trap_fatal() at trap_fatal+0x387/frame 0xfffffe0131a62800
+# trap() at trap+0xa4/frame 0xfffffe0131a62910
+# calltrap() at calltrap+0x8/frame 0xfffffe0131a62910
+# --- trap 0x12, rip = 0xffffffff80c310ee, rsp = 0xfffffe0131a629e0, rbp = 0xfffffe0131a62a30 ---
+# realtimer_expire_l() at realtimer_expire_l+0xee/frame 0xfffffe0131a62a30
+# softclock_call_cc() at softclock_call_cc+0x15d/frame 0xfffffe0131a62b00
+# softclock() at softclock+0x66/frame 0xfffffe0131a62b20
+# ithread_loop() at ithread_loop+0x279/frame 0xfffffe0131a62bb0
+# fork_exit() at fork_exit+0x80/frame 0xfffffe0131a62bf0
+# fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0131a62bf0
+# --- trap 0, rip = 0, rsp = 0, rbp = 0 ---
+# KDB: enter: panic
+# [ thread pid 12 tid 100161 ]
+# Stopped at kdb_enter+0x37: movq $0,0x1283f9e(%rip)
+# db> x/s version
+# version: FreeBSD 14.0-CURRENT #0 main-n246123-21afed4b1d1-dirty: Sat Apr 17 07:39:42 CEST 2021
+# pho@t2.osted.lan:/usr/src/sys/amd64/compile/PHO
+# db>
+
+[ `uname -p` != "amd64" ] && exit 0
+
+../default.cfg
+cat > /tmp/syzkaller33.c <<EOF
+// https://syzkaller.appspot.com/bug?id=38b58493445d524070d1a7cd73612f8cc9d01f39
+// autogenerated by syzkaller (https://github.com/google/syzkaller)
+// Reported-by: syzbot+5ab360bd3d3e3c5a6e0e@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 < 5000) {
+ continue;
+ }
+ kill_and_wait(pid, &status);
+ break;
+ }
+ }
+}
+
+uint64_t r[1] = {0x0};
+
+void execute_one(void)
+{
+ intptr_t res = 0;
+ res = syscall(SYS_ktimer_create, 0ul, 0ul, 0x200011c0ul);
+ if (res != -1)
+ r[0] = *(uint32_t*)0x200011c0;
+ *(uint64_t*)0x20001200 = 0x800000000000000;
+ *(uint64_t*)0x20001208 = 0;
+ *(uint64_t*)0x20001210 = 0;
+ *(uint64_t*)0x20001218 = 0xa2b;
+ syscall(SYS_ktimer_settime, r[0], 1ul, 0x20001200ul, 0ul);
+}
+int main(void)
+{
+ syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
+ loop();
+ return 0;
+}
+EOF
+mycc -o /tmp/syzkaller33 -Wall -Wextra -O0 /tmp/syzkaller33.c ||
+ exit 1
+
+(cd /tmp; timeout 3m ./syzkaller33)
+
+rm -rf /tmp/syzkaller33 syzkaller33.c /tmp/syzkaller.*
+exit 0