curl crashes with a segmentation fault when copying a large file from an intranet sftp site using an sftp:// URL

Issue

• curl on RHEL-6 has a bug which causes a segfault when a large file is copied from an intranet sftp site using an sftp:// URL.
• The file size exceeds 2 GB
• Steps to reproduce the problem:
  • Create a large file:

\#dd if=/dev/zero of=file.txt bs=1024 count=2500000
2500000+0 records in
2500000+0 records out
2560000000 bytes (2.6 GB) copied, 8.42809 s, 304 MB/s

• Download the file using sftp:

\#curl -vu '$user:$passwd' --connect-timeout 5 sftp://remote.host/dir/file.txt > /dev/null