Raise an error on syscall failure in tls_retry_write_records

[openssl.git] / crypto / bn / bn_div.c

diff --git a/crypto/bn/bn_div.c b/crypto/bn/bn_div.c
index cf4309cdf4c883b9328fb1c1c31ed00ea1f58110..ff66baa48f226868b45e97b4b47194cde1e422ce 100644 (file)
--- a/crypto/bn/bn_div.c
+++ b/crypto/bn/bn_div.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the Apache License 2.0 (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
@@ -97,7 +97,7 @@ BN_ULONG bn_div_3_words(const BN_ULONG *m, BN_ULONG d1, BN_ULONG d0);
  */
 #  if BN_BITS2 == 64 && defined(__SIZEOF_INT128__) && __SIZEOF_INT128__==16
 #   undef BN_ULLONG
-#   define BN_ULLONG __uint128_t
+#   define BN_ULLONG uint128_t
 #   define BN_LLONG
 #  endif
 
@@ -268,7 +268,7 @@ int bn_div_fixed_top(BIGNUM *dv, BIGNUM *rm, const BIGNUM *num,
     BIGNUM *tmp, *snum, *sdiv, *res;
     BN_ULONG *resp, *wnum, *wnumtop;
     BN_ULONG d0, d1;
-    int num_n, div_n;
+    int num_n, div_n, num_neg;
 
     assert(divisor->top > 0 && divisor->d[divisor->top - 1] != 0);
 
@@ -326,7 +326,8 @@ int bn_div_fixed_top(BIGNUM *dv, BIGNUM *rm, const BIGNUM *num,
     /* Setup quotient */
     if (!bn_wexpand(res, loop))
         goto err;
-    res->neg = (num->neg ^ divisor->neg);
+    num_neg = num->neg;
+    res->neg = (num_neg ^ divisor->neg);
     res->top = loop;
     res->flags |= BN_FLG_FIXED_TOP;
     resp = &(res->d[loop]);
@@ -442,11 +443,13 @@ int bn_div_fixed_top(BIGNUM *dv, BIGNUM *rm, const BIGNUM *num,
         *--resp = q;
     }
     /* snum holds remainder, it's as wide as divisor */
-    snum->neg = num->neg;
+    snum->neg = num_neg;
     snum->top = div_n;
     snum->flags |= BN_FLG_FIXED_TOP;
-    if (rm != NULL)
-        bn_rshift_fixed_top(rm, snum, norm_shift);
+
+    if (rm != NULL && bn_rshift_fixed_top(rm, snum, norm_shift) == 0)
+        goto err;
+
     BN_CTX_end(ctx);
     return 1;
  err: