125 lines
3.2 KiB
Bash
Executable File
125 lines
3.2 KiB
Bash
Executable File
#!/bin/sh
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[ `uname -p` != "amd64" ] && exit 0
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[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
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# panic: Assertion lock == sq->sq_lock failed at ../../../kern/subr_sleepqueue.c:371
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# cpuid = 1
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# time = 1623487895
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# KDB: stack backtrace:
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# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe06c14b4700
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# vpanic() at vpanic+0x181/frame 0xfffffe06c14b4750
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# panic() at panic+0x43/frame 0xfffffe06c14b47b0
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# sleepq_add() at sleepq_add+0x3e6/frame 0xfffffe06c14b4800
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# _sleep() at _sleep+0x20e/frame 0xfffffe06c14b48b0
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# kern_sigtimedwait() at kern_sigtimedwait+0x532/frame 0xfffffe06c14b4a20
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# sys_sigwaitinfo() at sys_sigwaitinfo+0x43/frame 0xfffffe06c14b4ac0
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# amd64_syscall() at amd64_syscall+0x147/frame 0xfffffe06c14b4bf0
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# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe06c14b4bf0
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# --- syscall (0, FreeBSD ELF64, nosys), rip = 0x8003af5fa, rsp = 0x7fffffffe5f8, rbp = 0x7fffffffe610 ---
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# KDB: enter: panic
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# [ thread pid 15370 tid 356127 ]
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# Stopped at kdb_enter+0x37: movq $0,0x1285b4e(%rip)
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# db> x/s version
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# version: FreeBSD 14.0-CURRENT #0 main-n247326-2349cda44fea: Sat Jun 12 03:57:33 CEST 2021
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# pho@mercat1.netperf.freebsd.org:/usr/src/sys/amd64/compile/PHO
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# db>
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. ../default.cfg
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cat > /tmp/syzkaller42.c <<EOF
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// https://syzkaller.appspot.com/bug?id=b12f0c4dc1e73c25636e4c4d4787209d155cca0a
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// autogenerated by syzkaller (https://github.com/google/syzkaller)
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// Reported-by: syzbot+1d89fc2a9ef92ef64fa8@syzkaller.appspotmail.com
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#define _GNU_SOURCE
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#include <sys/types.h>
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#include <pwd.h>
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#include <signal.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/endian.h>
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#include <sys/syscall.h>
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#include <sys/wait.h>
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#include <time.h>
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#include <unistd.h>
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static void kill_and_wait(int pid, int* status)
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{
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kill(pid, SIGKILL);
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while (waitpid(-1, status, 0) != pid) {
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}
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}
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static void sleep_ms(uint64_t ms)
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{
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usleep(ms * 1000);
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}
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static uint64_t current_time_ms(void)
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{
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struct timespec ts;
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if (clock_gettime(CLOCK_MONOTONIC, &ts))
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exit(1);
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return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
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}
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static void execute_one(void);
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#define WAIT_FLAGS 0
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static void loop(void)
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{
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int iter = 0;
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for (;; iter++) {
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int pid = fork();
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if (pid < 0)
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exit(1);
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if (pid == 0) {
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execute_one();
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exit(0);
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}
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int status = 0;
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uint64_t start = current_time_ms();
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for (;;) {
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if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
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break;
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sleep_ms(1);
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if (current_time_ms() - start < 5000) {
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continue;
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}
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kill_and_wait(pid, &status);
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break;
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}
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}
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}
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void execute_one(void)
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{
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syscall(SYS_rfork, 0x14034ul);
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*(uint32_t*)0x20000140 = 0x80000002;
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*(uint32_t*)0x20000144 = 0xfffffff7;
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*(uint32_t*)0x20000148 = 0x41;
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*(uint32_t*)0x2000014c = 3;
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syscall(SYS_sigwaitinfo, 0x20000140ul, 0ul);
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}
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int main(void)
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{
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syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
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loop();
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return 0;
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}
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EOF
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mycc -o /tmp/syzkaller42 -Wall -Wextra -O0 /tmp/syzkaller42.c -lpthread ||
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exit 1
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(cd /tmp; timeout 3m ./syzkaller42)
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rm -rf /tmp/syzkaller42 syzkaller42.c /tmp/syzkaller.*
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exit 0
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