151 lines
4.2 KiB
Bash
Executable File
151 lines
4.2 KiB
Bash
Executable File
#!/bin/sh
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# panic: Bad tailq NEXT(0xffffffff81cb0ba0->tqh_last) != NULL
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# cpuid = 0
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# time = 1605424954
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# KDB: stack backtrace:
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# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe010125c2e0
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# vpanic() at vpanic+0x182/frame 0xfffffe010125c330
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# panic() at panic+0x43/frame 0xfffffe010125c390
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# callout_process() at callout_process+0x34f/frame 0xfffffe010125c400
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# handleevents() at handleevents+0x185/frame 0xfffffe010125c440
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# timercb() at timercb+0x196/frame 0xfffffe010125c490
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# lapic_handle_timer() at lapic_handle_timer+0x9b/frame 0xfffffe010125c4c0
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# Xtimerint() at Xtimerint+0xb1/frame 0xfffffe010125c4c0
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# --- interrupt, rip = 0xffffffff80c56c69, rsp = 0xfffffe010125c590, rbp = 0xfffffe010125c5c0 ---
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# witness_unlock() at witness_unlock+0x79/frame 0xfffffe010125c5c0
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# __mtx_unlock_flags() at __mtx_unlock_flags+0x4d/frame 0xfffffe010125c5f0
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# kqueue_register() at kqueue_register+0x9e3/frame 0xfffffe010125c680
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# kqueue_kevent() at kqueue_kevent+0x106/frame 0xfffffe010125c950
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# kern_kevent_fp() at kern_kevent_fp+0x95/frame 0xfffffe010125c9a0
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# kern_kevent() at kern_kevent+0x80/frame 0xfffffe010125ca00
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# kern_kevent_generic() at kern_kevent_generic+0x70/frame 0xfffffe010125ca60
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# sys_kevent() at sys_kevent+0x61/frame 0xfffffe010125cac0
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# amd64_syscall() at amd64_syscall+0x144/frame 0xfffffe010125cbf0
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# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe010125cbf0
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# --- syscall (0, FreeBSD ELF64, nosys), rip = 0x800380c6a, rsp = 0x7fffffffe4d8, rbp = 0x7fffffffe500 ---
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# KDB: enter: panic
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# [ thread pid 36082 tid 144846 ]
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# Stopped at kdb_enter+0x37: movq $0,0x10aa7f6(%rip)
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# db> x/s version
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# version: FreeBSD 13.0-CURRENT #0 r367672: Sat Nov 14 08:42:14 CET 2020
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# pho@t2.osted.lan:/usr/src/sys/amd64/compile/PHO
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# db>
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[ `uname -p` != "amd64" ] && exit 0
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# Fixed by r367849
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. ../default.cfg
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cat > /tmp/syzkaller27.c <<EOF
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// https://syzkaller.appspot.com/bug?id=6b64d673525304a89af91e0db71f2dee8e8da0f7
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// autogenerated by syzkaller (https://github.com/google/syzkaller)
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// Reported-by: syzbot+79569cd4d76636b2cc1c@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 < 5 * 1000)
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continue;
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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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uint64_t r[1] = {0xffffffffffffffff};
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void execute_one(void)
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{
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intptr_t res = 0;
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res = syscall(SYS_kqueue);
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if (res != -1)
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r[0] = res;
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*(uint64_t*)0x200000c0 = 0;
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*(uint16_t*)0x200000c8 = 0xfff9;
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*(uint16_t*)0x200000ca = 0x4001;
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*(uint32_t*)0x200000cc = 4;
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*(uint64_t*)0x200000d0 = 0;
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*(uint64_t*)0x200000d8 = 0;
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*(uint64_t*)0x200000e0 = 0;
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*(uint64_t*)0x200000e8 = 0;
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*(uint64_t*)0x200000f0 = 0;
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*(uint64_t*)0x200000f8 = 0;
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syscall(SYS_kevent, r[0], 0x200000c0ul, 1ul, 0ul, 0ul, 0ul);
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}
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int main(void)
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{
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sleep(2); /* pho */
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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/syzkaller27 -Wall -Wextra -O0 /tmp/syzkaller27.c ||
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exit 1
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(cd ../testcases/swap; ./swap -t 1m -i 20 -h > /dev/null 2>&1) &
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for i in `jot 256`; do
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(cd /tmp; timeout 3m ./syzkaller27) &
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done
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wait
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rm -rf /tmp/syzkaller27 /tmp/syzkaller27.c /tmp/syzkaller.*
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exit 0
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