crypto/bn/bn_gf2m.c:1018: error: BUFFER_OVERRUN_L3
  Offset: [-1, +oo] Size: [1, +oo] by call to `BN_GF2m_mod_sqr_arr`.
Showing all 20 steps of the trace


crypto/bn/bn_gf2m.c:983:1: Parameter `ctx->stack.depth`
981.    * 0. Uses algorithms A.4.7 and A.4.6 from IEEE P1363.
982.    */
983. > int BN_GF2m_mod_solve_quad_arr(BIGNUM *r, const BIGNUM *a_, const int p[],
984.                                  BN_CTX *ctx)
985.   {

crypto/bn/bn_gf2m.c:997:5: Call
995.       }
996.   
997.       BN_CTX_start(ctx);
            ^
998.       a = BN_CTX_get(ctx);
999.       z = BN_CTX_get(ctx);

crypto/bn/bn_ctx.c:171:1: Parameter `ctx->stack.depth`
  169.   }
  170.   
  171. > void BN_CTX_start(BN_CTX *ctx)
  172.   {
  173.       CTXDBG("ENTER BN_CTX_start()", ctx);

crypto/bn/bn_gf2m.c:998:9: Call
996.   
997.       BN_CTX_start(ctx);
998.       a = BN_CTX_get(ctx);
                ^
999.       z = BN_CTX_get(ctx);
1000.       w = BN_CTX_get(ctx);

crypto/bn/bn_ctx.c:202:1: Parameter `ctx->stack.depth`
  200.   }
  201.   
  202. > BIGNUM *BN_CTX_get(BN_CTX *ctx)
  203.   {
  204.       BIGNUM *ret;

crypto/bn/bn_gf2m.c:999:9: Call
997.       BN_CTX_start(ctx);
998.       a = BN_CTX_get(ctx);
999.       z = BN_CTX_get(ctx);
                ^
1000.       w = BN_CTX_get(ctx);
1001.       if (w == NULL)

crypto/bn/bn_ctx.c:202:1: Parameter `ctx->stack.depth`
  200.   }
  201.   
  202. > BIGNUM *BN_CTX_get(BN_CTX *ctx)
  203.   {
  204.       BIGNUM *ret;

crypto/bn/bn_gf2m.c:1000:9: Call
998.       a = BN_CTX_get(ctx);
999.       z = BN_CTX_get(ctx);
1000.       w = BN_CTX_get(ctx);
                ^
1001.       if (w == NULL)
1002.           goto err;

crypto/bn/bn_ctx.c:202:1: Parameter `ctx->stack.depth`
  200.   }
  201.   
  202. > BIGNUM *BN_CTX_get(BN_CTX *ctx)
  203.   {
  204.       BIGNUM *ret;

crypto/bn/bn_gf2m.c:1018:18: Call
1016.               goto err;
1017.           for (j = 1; j <= (p[0] - 1) / 2; j++) {
1018.               if (!BN_GF2m_mod_sqr_arr(z, z, p, ctx))
                         ^
1019.                   goto err;
1020.               if (!BN_GF2m_mod_sqr_arr(z, z, p, ctx))

crypto/bn/bn_gf2m.c:496:5: Call
  494.   
  495.       bn_check_top(a);
  496.       BN_CTX_start(ctx);
             ^
  497.       if ((s = BN_CTX_get(ctx)) == NULL)
  498.           goto err;

crypto/bn/bn_ctx.c:171:1: Parameter `*ctx->stack.indexes`
    169.   }
    170.   
    171. > void BN_CTX_start(BN_CTX *ctx)
    172.   {
    173.       CTXDBG("ENTER BN_CTX_start()", ctx);

crypto/bn/bn_gf2m.c:514:5: Call
  512.       ret = 1;
  513.    err:
  514.       BN_CTX_end(ctx);
             ^
  515.       return ret;
  516.   }

crypto/bn/bn_ctx.c:185:1: Parameter `*ctx->stack.indexes`
    183.   }
    184.   
    185. > void BN_CTX_end(BN_CTX *ctx)
    186.   {
    187.       CTXDBG("ENTER BN_CTX_end()", ctx);

crypto/bn/bn_ctx.c:191:27: Call
    189.           ctx->err_stack--;
    190.       else {
    191.           unsigned int fp = BN_STACK_pop(&ctx->stack);
                                     ^
    192.           /* Does this stack frame have anything to release? */
    193.           if (fp < ctx->used)

crypto/bn/bn_ctx.c:266:1: <Offset trace>
264.   }
265.   
266. > static unsigned int BN_STACK_pop(BN_STACK *st)
267.   {
268.       return st->indexes[--(st->depth)];

crypto/bn/bn_ctx.c:266:1: Parameter `st->depth`
      264.   }
      265.   
      266. > static unsigned int BN_STACK_pop(BN_STACK *st)
      267.   {
      268.       return st->indexes[--(st->depth)];

crypto/bn/bn_ctx.c:266:1: <Length trace>
264.   }
265.   
266. > static unsigned int BN_STACK_pop(BN_STACK *st)
267.   {
268.       return st->indexes[--(st->depth)];

crypto/bn/bn_ctx.c:266:1: Parameter `*st->indexes`
      264.   }
      265.   
      266. > static unsigned int BN_STACK_pop(BN_STACK *st)
      267.   {
      268.       return st->indexes[--(st->depth)];

crypto/bn/bn_ctx.c:268:12: Array access: Offset: [-1, +oo] Size: [1, +oo] by call to `BN_GF2m_mod_sqr_arr` 
      266.   static unsigned int BN_STACK_pop(BN_STACK *st)
      267.   {
      268.       return st->indexes[--(st->depth)];
                        ^
      269.   }
      270.   

static unsigned int BN_STACK_pop(BN_STACK *st)
{
    return st->indexes[--(st->depth)];
}
['int BN_GF2m_mod_solve_quad_arr(BIGNUM *r, const BIGNUM *a_, const int p[],\n                               BN_CTX *ctx)\n{\n    int ret = 0, count = 0, j;\n    BIGNUM *a, *z, *rho, *w, *w2, *tmp;\n    bn_check_top(a_);\n    if (!p[0]) {\n        BN_zero(r);\n        return 1;\n    }\n    BN_CTX_start(ctx);\n    a = BN_CTX_get(ctx);\n    z = BN_CTX_get(ctx);\n    w = BN_CTX_get(ctx);\n    if (w == NULL)\n        goto err;\n    if (!BN_GF2m_mod_arr(a, a_, p))\n        goto err;\n    if (BN_is_zero(a)) {\n        BN_zero(r);\n        ret = 1;\n        goto err;\n    }\n    if (p[0] & 0x1) {\n        if (!BN_copy(z, a))\n            goto err;\n        for (j = 1; j <= (p[0] - 1) / 2; j++) {\n            if (!BN_GF2m_mod_sqr_arr(z, z, p, ctx))\n                goto err;\n            if (!BN_GF2m_mod_sqr_arr(z, z, p, ctx))\n                goto err;\n            if (!BN_GF2m_add(z, z, a))\n                goto err;\n        }\n    } else {\n        rho = BN_CTX_get(ctx);\n        w2 = BN_CTX_get(ctx);\n        tmp = BN_CTX_get(ctx);\n        if (tmp == NULL)\n            goto err;\n        do {\n            if (!BN_priv_rand(rho, p[0], BN_RAND_TOP_ONE, BN_RAND_BOTTOM_ANY))\n                goto err;\n            if (!BN_GF2m_mod_arr(rho, rho, p))\n                goto err;\n            BN_zero(z);\n            if (!BN_copy(w, rho))\n                goto err;\n            for (j = 1; j <= p[0] - 1; j++) {\n                if (!BN_GF2m_mod_sqr_arr(z, z, p, ctx))\n                    goto err;\n                if (!BN_GF2m_mod_sqr_arr(w2, w, p, ctx))\n                    goto err;\n                if (!BN_GF2m_mod_mul_arr(tmp, w2, a, p, ctx))\n                    goto err;\n                if (!BN_GF2m_add(z, z, tmp))\n                    goto err;\n                if (!BN_GF2m_add(w, w2, rho))\n                    goto err;\n            }\n            count++;\n        } while (BN_is_zero(w) && (count < MAX_ITERATIONS));\n        if (BN_is_zero(w)) {\n            BNerr(BN_F_BN_GF2M_MOD_SOLVE_QUAD_ARR, BN_R_TOO_MANY_ITERATIONS);\n            goto err;\n        }\n    }\n    if (!BN_GF2m_mod_sqr_arr(w, z, p, ctx))\n        goto err;\n    if (!BN_GF2m_add(w, z, w))\n        goto err;\n    if (BN_GF2m_cmp(w, a)) {\n        BNerr(BN_F_BN_GF2M_MOD_SOLVE_QUAD_ARR, BN_R_NO_SOLUTION);\n        goto err;\n    }\n    if (!BN_copy(r, z))\n        goto err;\n    bn_check_top(r);\n    ret = 1;\n err:\n    BN_CTX_end(ctx);\n    return ret;\n}', 'void BN_CTX_start(BN_CTX *ctx)\n{\n    CTXDBG("ENTER BN_CTX_start()", ctx);\n    if (ctx->err_stack || ctx->too_many)\n        ctx->err_stack++;\n    else if (!BN_STACK_push(&ctx->stack, ctx->used)) {\n        BNerr(BN_F_BN_CTX_START, BN_R_TOO_MANY_TEMPORARY_VARIABLES);\n        ctx->err_stack++;\n    }\n    CTXDBG("LEAVE BN_CTX_start()", ctx);\n}', 'BIGNUM *BN_CTX_get(BN_CTX *ctx)\n{\n    BIGNUM *ret;\n    CTXDBG("ENTER BN_CTX_get()", ctx);\n    if (ctx->err_stack || ctx->too_many)\n        return NULL;\n    if ((ret = BN_POOL_get(&ctx->pool, ctx->flags)) == NULL) {\n        ctx->too_many = 1;\n        BNerr(BN_F_BN_CTX_GET, BN_R_TOO_MANY_TEMPORARY_VARIABLES);\n        return NULL;\n    }\n    BN_zero(ret);\n    ret->flags &= (~BN_FLG_CONSTTIME);\n    ctx->used++;\n    CTXDBG("LEAVE BN_CTX_get()", ctx);\n    return ret;\n}', 'int BN_GF2m_mod_sqr_arr(BIGNUM *r, const BIGNUM *a, const int p[],\n                        BN_CTX *ctx)\n{\n    int i, ret = 0;\n    BIGNUM *s;\n    bn_check_top(a);\n    BN_CTX_start(ctx);\n    if ((s = BN_CTX_get(ctx)) == NULL)\n        goto err;\n    if (!bn_wexpand(s, 2 * a->top))\n        goto err;\n    for (i = a->top - 1; i >= 0; i--) {\n        s->d[2 * i + 1] = SQR1(a->d[i]);\n        s->d[2 * i] = SQR0(a->d[i]);\n    }\n    s->top = 2 * a->top;\n    bn_correct_top(s);\n    if (!BN_GF2m_mod_arr(r, s, p))\n        goto err;\n    bn_check_top(r);\n    ret = 1;\n err:\n    BN_CTX_end(ctx);\n    return ret;\n}', 'void BN_CTX_end(BN_CTX *ctx)\n{\n    CTXDBG("ENTER BN_CTX_end()", ctx);\n    if (ctx->err_stack)\n        ctx->err_stack--;\n    else {\n        unsigned int fp = BN_STACK_pop(&ctx->stack);\n        if (fp < ctx->used)\n            BN_POOL_release(&ctx->pool, ctx->used - fp);\n        ctx->used = fp;\n        ctx->too_many = 0;\n    }\n    CTXDBG("LEAVE BN_CTX_end()", ctx);\n}', 'static unsigned int BN_STACK_pop(BN_STACK *st)\n{\n    return st->indexes[--(st->depth)];\n}']