[ovs-git] [openvswitch/ovs] 576a20: netdev-linux: Avoid division by 0 if kernel report...

GitHub noreply at github.com
Mon Aug 20 16:31:11 UTC 2018


  Branch: refs/heads/branch-2.7
  Home:   https://github.com/openvswitch/ovs
  Commit: 576a2011a2872bf0f05ae19cf20425f88c837999
      https://github.com/openvswitch/ovs/commit/576a2011a2872bf0f05ae19cf20425f88c837999
  Author: Ben Pfaff <blp at ovn.org>
  Date:   2018-08-20 (Mon, 20 Aug 2018)

  Changed paths:
    M lib/netdev-linux.c

  Log Message:
  -----------
  netdev-linux: Avoid division by 0 if kernel reports bad scheduler data.

If the kernel reported a value of 0 for the second value in
/proc/net/psched, it would cause a division-by-zero fault in
read_psched().  I don't know of a kernel that would actually do that, but
it's still better to be safe.

Found by clang static analyzer.

Reported-by: Bhargava Shastry <bshastry at sect.tu-berlin.de>
Signed-off-by: Ben Pfaff <blp at ovn.org>
Reviewed-by: Yifeng Sun <pkusunyifeng at gmail.com>



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