| // INFO: rcu detected stall in commit_echoes |
| // https://syzkaller.appspot.com/bug?id=c85201ccbee00fd0b04f9239d1ec7bae8fa2e055 |
| // status:dup |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| #include <endian.h> |
| #include <fcntl.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <sys/ioctl.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.h> |
| #include <unistd.h> |
| |
| static uintptr_t syz_open_pts(uintptr_t a0, uintptr_t a1) |
| { |
| int ptyno = 0; |
| if (ioctl(a0, TIOCGPTN, &ptyno)) |
| return -1; |
| char buf[128]; |
| sprintf(buf, "/dev/pts/%d", ptyno); |
| return open(buf, a1, 0); |
| } |
| |
| static void execute_one(); |
| extern unsigned long long procid; |
| |
| void loop() |
| { |
| while (1) { |
| execute_one(); |
| } |
| } |
| |
| uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; |
| void execute_one() |
| { |
| long res = 0; |
| memcpy((void*)0x20000100, "/dev/ptmx", 10); |
| res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000100, 0x101c02, 0); |
| if (res != -1) |
| r[0] = res; |
| memcpy((void*)0x20000080, "/dev/vga_arbiter", 17); |
| res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000080, 0x2000, 0); |
| if (res != -1) |
| r[1] = res; |
| *(uint32_t*)0x203b3fdc = 0; |
| *(uint32_t*)0x203b3fe0 = 0; |
| *(uint32_t*)0x203b3fe4 = 0; |
| *(uint32_t*)0x203b3fe8 = 0; |
| *(uint8_t*)0x203b3fec = 0; |
| *(uint8_t*)0x203b3fed = 0; |
| *(uint8_t*)0x203b3fee = 0; |
| *(uint8_t*)0x203b3fef = 0; |
| *(uint32_t*)0x203b3ff0 = 0; |
| *(uint32_t*)0x203b3ff4 = 0; |
| *(uint32_t*)0x203b3ff8 = 0; |
| *(uint32_t*)0x203b3ffc = 0; |
| syscall(__NR_ioctl, r[0], 0x40045431, 0x203b3fdc); |
| syscall(__NR_write, r[0], 0x20000080, 0x100000272); |
| syscall(__NR_ioctl, r[1], 0x80dc5521, 0x200002c0); |
| res = syz_open_pts(r[0], 0xa00); |
| if (res != -1) |
| r[2] = res; |
| *(uint32_t*)0x200000c0 = 0; |
| *(uint32_t*)0x200000c4 = 0; |
| *(uint32_t*)0x200000c8 = 0; |
| *(uint32_t*)0x200000cc = 0; |
| *(uint8_t*)0x200000d0 = 0; |
| *(uint8_t*)0x200000d1 = 0; |
| *(uint8_t*)0x200000d2 = 0; |
| *(uint8_t*)0x200000d3 = 0; |
| *(uint32_t*)0x200000d4 = 0; |
| *(uint32_t*)0x200000d8 = 0; |
| *(uint32_t*)0x200000dc = 0; |
| *(uint32_t*)0x200000e0 = 0; |
| syscall(__NR_ioctl, r[2], 0x5412, 0x200000c0); |
| syscall(__NR_ioctl, r[0], 0x5411, 0x20000140); |
| } |
| |
| int main() |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| for (;;) { |
| loop(); |
| } |
| } |