[ovs-build] Failed: ovsrobot/ovs#1663 (series_133594 - ae7efc6)

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Tue Oct 1 18:53:19 UTC 2019

Build Update for ovsrobot/ovs

Build: #1663
Status: Failed

Duration: 56 mins and 9 secs
Commit: ae7efc6 (series_133594)
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: 0-day Robot <robot at bytheb.org>

View the changeset: https://github.com/ovsrobot/ovs/compare/3e0205082b52^...ae7efc6839ad

View the full build log and details: https://travis-ci.org/ovsrobot/ovs/builds/592160240?utm_medium=notification&utm_source=email


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