[ovs-build] Passed: williamtu/ovs-travis#276 (icmp6hdr - e153b87)

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Tue Oct 8 16:59:55 UTC 2019

Build Update for williamtu/ovs-travis

Build: #276
Status: Passed

Duration: 58 mins and 48 secs
Commit: e153b87 (icmp6hdr)
Author: Ilya Maximets
Message: flow: Fix using pointer to member of packed struct icmp6_hdr.

OVS has no structure definition for ICMPv6 header with additional
data. More precisely, it has, but this structure named as
'icmp6_error_header' and only suitable to store error related
extended information.  'flow_compose_l4' stores additional
information in reserved bits by using system defined structure
'icmp6_hdr', which is marked as 'packed' and this leads to
build failure with gcc >= 9:

  lib/flow.c:3041:34: error:
    taking address of packed member of 'struct icmp6_hdr' may result
    in an unaligned pointer value [-Werror=address-of-packed-member]

        uint32_t *reserved = &icmp->icmp6_dataun.icmp6_un_data32[0];
Fix that by renaming 'icmp6_error_header' to 'icmp6_data_header'
and allowing it to store not only errors, but any type of additional
information by analogue with 'struct icmp6_hdr'.
All the usages of 'struct icmp6_hdr' replaced with this new structure.
Removed redundant conversions between network and host representations.
Now fields are always in be.

This also, probably, makes flow_compose_l4 more robust by avoiding
possible unaligned accesses to 32 bit value.

Fixes: 9b2b84973db7 ("Support for match & set ICMPv6 reserved and options type fields")
Signed-off-by: Ilya Maximets <i.maximets at ovn.org>
Signed-off-by: William Tu <u9012063 at gmail.com>

View the changeset: https://github.com/williamtu/ovs-travis/compare/ef11ff8a596b^...e153b870cb40

View the full build log and details: https://travis-ci.org/williamtu/ovs-travis/builds/595194187?utm_medium=notification&utm_source=email


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