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

Solution Verified - Updated -

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

Environment

  • Red Hat Enterprise Linux 6
  • curl
  • libssh2-1.2.2-7.el6_1.1

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