167 lines
4.4 KiB
Bash
Executable File
167 lines
4.4 KiB
Bash
Executable File
#!/bin/sh
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# panic: Bad link elm 0xfffff8001a83db00 prev->next != elm
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# cpuid = 21
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# time = 1605387390
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# KDB: stack backtrace:
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# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0100a983e0
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# vpanic() at vpanic+0x182/frame 0xfffffe0100a98430
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# panic() at panic+0x43/frame 0xfffffe0100a98490
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# _callout_stop_safe() at _callout_stop_safe+0x726/frame 0xfffffe0100a98520
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# filt_timerdetach() at filt_timerdetach+0x20/frame 0xfffffe0100a98540
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# kqueue_drain() at kqueue_drain+0x2c8/frame 0xfffffe0100a98580
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# kqueue_close() at kqueue_close+0x7d/frame 0xfffffe0100a985c0
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# _fdrop() at _fdrop+0x1b/frame 0xfffffe0100a985e0
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# closef() at closef+0x1ea/frame 0xfffffe0100a98670
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# fdescfree_fds() at fdescfree_fds+0x8c/frame 0xfffffe0100a986d0
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# fdescfree() at fdescfree+0x3cd/frame 0xfffffe0100a987a0
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# exit1() at exit1+0x487/frame 0xfffffe0100a98810
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# sigexit() at sigexit+0x15c/frame 0xfffffe0100a98ae0
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# postsig() at postsig+0x2cc/frame 0xfffffe0100a98bb0
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# ast() at ast+0x5eb/frame 0xfffffe0100a98bf0
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# doreti_ast() at doreti_ast+0x1f/frame 0x7fffffffe570
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# KDB: enter: panic
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# [ thread pid 82279 tid 100717 ]
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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/syzkaller26.c <<EOF
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// https://syzkaller.appspot.com/bug?id=95ac7e30218c63bc9322b1dd775101f8f88de4ff
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// autogenerated by syzkaller (https://github.com/google/syzkaller)
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// Reported-by: syzbot+1b27e0237aa22d8adffa@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*)0x20000000 = 3;
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*(uint16_t*)0x20000008 = 0xfff3;
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*(uint16_t*)0x2000000a = 0x4000;
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*(uint32_t*)0x2000000c = 0x1000000;
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*(uint64_t*)0x20000010 = 0xe;
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*(uint64_t*)0x20000018 = 0xff;
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*(uint64_t*)0x20000020 = 2;
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*(uint64_t*)0x20000028 = 2;
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*(uint64_t*)0x20000030 = 4;
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*(uint64_t*)0x20000038 = 0xffffffffffffff90;
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*(uint64_t*)0x20000040 = 0x101;
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*(uint16_t*)0x20000048 = 0xfff6;
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*(uint16_t*)0x2000004a = 0x22;
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*(uint32_t*)0x2000004c = 0x20;
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*(uint64_t*)0x20000050 = 0xe1;
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*(uint64_t*)0x20000058 = -1;
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*(uint64_t*)0x20000060 = 0x81;
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*(uint64_t*)0x20000068 = 4;
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*(uint64_t*)0x20000070 = 0x8000;
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*(uint64_t*)0x20000078 = 9;
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*(uint64_t*)0x20000080 = 0;
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*(uint16_t*)0x20000088 = 0xfff9;
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*(uint16_t*)0x2000008a = 0xefc9;
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*(uint32_t*)0x2000008c = 4;
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*(uint64_t*)0x20000090 = 0;
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*(uint64_t*)0x20000098 = 0x400;
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*(uint64_t*)0x200000a0 = 0x2e77;
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*(uint64_t*)0x200000a8 = 2;
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*(uint64_t*)0x200000b0 = 0x7fffffff;
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*(uint64_t*)0x200000b8 = 7;
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syscall(SYS_kevent, r[0], 0x20000000ul, 3ul, 0x200000c0ul, 9ul, 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/syzkaller26 -Wall -Wextra -O0 /tmp/syzkaller26.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 ./syzkaller26) &
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done
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wait
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rm -rf /tmp/syzkaller26 /tmp/syzkaller26.c /tmp/syzkaller.*
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exit 0
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