[git] GnuPG - branch, master, updated. gnupg-2.2.7-209-gf80346f

[by NIIBE Yutaka]

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      from  adce73b86fd49d5bbb8884231a26cc7533d400e2 (commit)

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- Log -----------------------------------------------------------------
commit f80346f42df4bdc7d0a9741c3922129aceae4f81
Author: NIIBE Yutaka <gniibe at fsij.org>
Date:   Mon Sep 10 13:44:47 2018 +0900

    common: Use iobuf_get_noeof to avoid undefined behaviors.
    
    * common/iobuf.c (block_filter): Use iobuf_get_noeof.
    
    --
    
    When singed integer has negative value, left shift computation is
    undefined in C.
    
    GnuPG-bug-id: 4093
    Reported-by: Philippe Antoine
    Signed-off-by: NIIBE Yutaka <gniibe at fsij.org>

diff --git a/common/iobuf.c b/common/iobuf.c
index 02c9b49..8f52f7f 100644
--- a/common/iobuf.c
+++ b/common/iobuf.c
@@ -878,9 +878,9 @@ block_filter (void *opaque, int control, iobuf_t chain, byte * buffer,
 		    }
 		  else if (c == 255)
 		    {
-		      a->size = (size_t)iobuf_get (chain) << 24;
-		      a->size |= iobuf_get (chain) << 16;
-		      a->size |= iobuf_get (chain) << 8;
+		      a->size = iobuf_get_noeof (chain) << 24;
+		      a->size |= iobuf_get_noeof (chain) << 16;
+		      a->size |= iobuf_get_noeof (chain) << 8;
 		      if ((c = iobuf_get (chain)) == -1)
 			{
 			  log_error ("block_filter: invalid 4 byte length\n");

-----------------------------------------------------------------------

Summary of changes:
 common/iobuf.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)


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