// https://syzkaller.appspot.com/bug?id=6dcd14a729df98f989c7b76d254226ae67084efd // autogenerated by syzkaller (http://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include static uintptr_t syz_open_dev(uintptr_t a0, uintptr_t a1, uintptr_t a2) { if (a0 == 0xc || a0 == 0xb) { char buf[128]; sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1, (uint8_t)a2); return open(buf, O_RDWR, 0); } else { char buf[1024]; char* hash; strncpy(buf, (char*)a0, sizeof(buf)); buf[sizeof(buf) - 1] = 0; while ((hash = strchr(buf, '#'))) { *hash = '0' + (char)(a1 % 10); a1 /= 10; } return open(buf, a2, 0); } } #ifndef __NR_write #define __NR_write 4 #endif #ifndef __NR_read #define __NR_read 3 #endif #ifndef __NR_mmap #define __NR_mmap 192 #endif #undef __NR_mmap #define __NR_mmap __NR_mmap2 long r[1]; void loop() { memset(r, -1, sizeof(r)); syscall(__NR_mmap, 0x20000000, 0xfff000, 3, 0x32, -1, 0); memcpy((void*)0x2000bff7, "/dev/sg#", 9); r[0] = syz_open_dev(0x2000bff7, 0, 2); *(uint32_t*)0x2082bf88 = 0; *(uint32_t*)0x2082bf8c = 0; *(uint16_t*)0x2082bf90 = 0; *(uint16_t*)0x2082bf92 = 3; *(uint32_t*)0x2082bf94 = 0x8416; *(uint32_t*)0x2082bf98 = 0; *(uint32_t*)0x2082bf9c = 0; *(uint16_t*)0x2082bfa0 = 0; *(uint16_t*)0x2082bfa2 = 0xd; *(uint32_t*)0x2082bfa4 = 6; *(uint32_t*)0x2082bfa8 = 0; *(uint32_t*)0x2082bfac = 0; *(uint16_t*)0x2082bfb0 = 1; *(uint16_t*)0x2082bfb2 = 0x3ff; *(uint32_t*)0x2082bfb4 = 0x400; *(uint32_t*)0x2082bfb8 = 0; *(uint32_t*)0x2082bfbc = 0; *(uint16_t*)0x2082bfc0 = 0xc96; *(uint16_t*)0x2082bfc2 = 0; *(uint32_t*)0x2082bfc4 = 0x7fff; syscall(__NR_write, r[0], 0x2082bf88, 0x60); syscall(__NR_read, r[0], 0x20000000, 0); } int main() { loop(); return 0; }