crypto/ec/ecp_smpl.c:1197: error: INTEGER_OVERFLOW_L2
  ([0, +oo] - 1):unsigned32 by call to `BN_CTX_end`.
Showing all 9 steps of the trace


crypto/ec/ecp_smpl.c:1163:1: Parameter `ctx->stack.depth`
1161.   }
1162.   
1163. > int ec_GFp_simple_make_affine(const EC_GROUP *group, EC_POINT *point,
1164.                                 BN_CTX *ctx)
1165.   {

crypto/ec/ecp_smpl.c:1179:5: Call
1177.       }
1178.   
1179.       BN_CTX_start(ctx);
            ^
1180.       x = BN_CTX_get(ctx);
1181.       y = 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/ec/ecp_smpl.c:1197:5: Call
1195.   
1196.    err:
1197.       BN_CTX_end(ctx);
            ^
1198.       BN_CTX_free(new_ctx);
1199.       return ret;

crypto/bn/bn_ctx.c:185:1: Parameter `ctx->stack.depth`
  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: <LHS 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:268:12: Binary operation: ([0, +oo] - 1):unsigned32 by call to `BN_CTX_end` 
    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 ec_GFp_simple_make_affine(const EC_GROUP *group, EC_POINT *point,\n                              BN_CTX *ctx)\n{\n    BN_CTX *new_ctx = NULL;\n    BIGNUM *x, *y;\n    int ret = 0;\n    if (point->Z_is_one || EC_POINT_is_at_infinity(group, point))\n        return 1;\n    if (ctx == NULL) {\n        ctx = new_ctx = BN_CTX_new();\n        if (ctx == NULL)\n            return 0;\n    }\n    BN_CTX_start(ctx);\n    x = BN_CTX_get(ctx);\n    y = BN_CTX_get(ctx);\n    if (y == NULL)\n        goto err;\n    if (!EC_POINT_get_affine_coordinates(group, point, x, y, ctx))\n        goto err;\n    if (!EC_POINT_set_affine_coordinates(group, point, x, y, ctx))\n        goto err;\n    if (!point->Z_is_one) {\n        ECerr(EC_F_EC_GFP_SIMPLE_MAKE_AFFINE, ERR_R_INTERNAL_ERROR);\n        goto err;\n    }\n    ret = 1;\n err:\n    BN_CTX_end(ctx);\n    BN_CTX_free(new_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}', '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}']