Public bug reported:
Some Eoan GCC (9) errors in my environment:
----
In file included from /usr/include/string.h:494,
from
/home/inaddy/work/sources/ubuntu/qemu/include/qemu/osdep.h:101,
from
/home/inaddy/work/sources/ubuntu/qemu/util/qemu-sockets.c:18:
In function ‘strncpy’,
inlined from ‘unix_connect_saddr.isra.0’ at
/home/inaddy/work/sources/ubuntu/qemu/util/qemu-sockets.c:925:5:
/usr/include/x86_64-linux-gnu/bits/string_fortified.h:106:10: error:
‘__builtin_strncpy’ specified bound 108 equals destination size
[-Werror=stringop-truncation]
106 | return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In function ‘strncpy’,
inlined from ‘unix_listen_saddr.isra.0’ at
/home/inaddy/work/sources/ubuntu/qemu/util/qemu-sockets.c:880:5:
/usr/include/x86_64-linux-gnu/bits/string_fortified.h:106:10: error:
‘__builtin_strncpy’ specified bound 108 equals destination size
[-Werror=stringop-truncation]
106 | return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
----
Fixed (and tested) by upstream commit:
commit 2d2023c3b99edb33ad4bb9791f70456ea1a1c049
Author: Daniel P. Berrangé <berra...@redhat.com>
Date: Wed May 1 11:50:52 2019
sockets: avoid string truncation warnings when copying UNIX path
----
/home/inaddy/work/sources/ubuntu/qemu/hw/display/qxl.c: In function
‘init_qxl_ram’:
/home/inaddy/work/sources/ubuntu/qemu/hw/display/qxl.c:50:19: error: taking
address of packed member of ‘struct QXLReleaseRing_ring_el’ may result in an
unaligned pointer value [-Werror=address-of-packed-member]
50 | ret = &(r)->items[prod].el;
\
| ^~~~~~~~~~~~~~~~~~~~
/home/inaddy/work/sources/ubuntu/qemu/hw/display/qxl.c:429:5: note: in
expansion of macro ‘SPICE_RING_PROD_ITEM’
429 | SPICE_RING_PROD_ITEM(d, &d->ram->release_ring, item);
| ^~~~~~~~~~~~~~~~~~~~
/home/inaddy/work/sources/ubuntu/qemu/hw/display/qxl.c: In function
‘qxl_push_free_res’:
/home/inaddy/work/sources/ubuntu/qemu/hw/display/qxl.c:50:19: error: taking
address of packed member of ‘struct QXLReleaseRing_ring_el’ may result in an
unaligned pointer value [-Werror=address-of-packed-member]
50 | ret = &(r)->items[prod].el;
\
| ^~~~~~~~~~~~~~~~~~~~
/home/inaddy/work/sources/ubuntu/qemu/hw/display/qxl.c:762:5: note: in
expansion of macro ‘SPICE_RING_PROD_ITEM’
762 | SPICE_RING_PROD_ITEM(d, ring, item);
| ^~~~~~~~~~~~~~~~~~~~
/home/inaddy/work/sources/ubuntu/qemu/hw/display/qxl.c: In function
‘interface_release_resource’:
/home/inaddy/work/sources/ubuntu/qemu/hw/display/qxl.c:50:19: error: taking
address of packed member of ‘struct QXLReleaseRing_ring_el’ may result in an
unaligned pointer value [-Werror=address-of-packed-member]
50 | ret = &(r)->items[prod].el;
\
| ^~~~~~~~~~~~~~~~~~~~
/home/inaddy/work/sources/ubuntu/qemu/hw/display/qxl.c:795:5: note: in
expansion of macro ‘SPICE_RING_PROD_ITEM’
795 | SPICE_RING_PROD_ITEM(qxl, ring, item);
----
Fixed (and tested) by upstream commit:
commit 94932c95c10400acd286fd768a6b411e7ebbec8f
Author: Daniel P. Berrangé <berra...@redhat.com>
Date: Fri Apr 12 09:16:26 2019
qxl: avoid unaligned pointer reads/writes
----
/home/inaddy/work/sources/ubuntu/qemu/hw/usb/hcd-xhci.c: In function
‘usb_xhci_realize’:
/home/inaddy/work/sources/ubuntu/qemu/hw/usb/hcd-xhci.c:3339:66: error: ‘%d’
directive output may be truncated writing between 1 and 10 bytes into a region
of size 5 [-Werror=format-truncation=]
3339 | snprintf(port->name, sizeof(port->name), "usb2 port #%d",
i+1);
| ^~
/home/inaddy/work/sources/ubuntu/qemu/hw/usb/hcd-xhci.c:3339:54: note:
directive argument in the range [1, 2147483647]
3339 | snprintf(port->name, sizeof(port->name), "usb2 port #%d",
i+1);
| ^~~~~~~~~~~~~~~
In file included from /usr/include/stdio.h:867,
from
/home/inaddy/work/sources/ubuntu/qemu/include/qemu/osdep.h:99,
from
/home/inaddy/work/sources/ubuntu/qemu/hw/usb/hcd-xhci.c:21:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:67:10: note:
‘__builtin___snprintf_chk’ output between 13 and 22 bytes into a destination of
size 16
67 | return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
68 | __bos (__s), __fmt, __va_arg_pack ());
----
Fixed (and tested) by upstream commit:
commit ccb799313a5926a6aa49018bbc67fe6165fad7f3
Author: Daniel P. Berrangé <berra...@redhat.com>
Date: Fri Apr 12 09:16:25 2019
hw/usb: avoid format truncation warning when formatting port name
----
/home/inaddy/work/sources/ubuntu/qemu/hw/usb/dev-mtp.c: In function
‘usb_mtp_write_metadata’:
/home/inaddy/work/sources/ubuntu/qemu/hw/usb/dev-mtp.c:1715:36: error: taking
address of packed member of ‘struct <anonymous>’ may result in an unaligned
pointer value [-Werror=address-of-packed-member]
1715 | dataset->filename);
----
Fixed (and tested) by upstream commit:
commit 1259f27ec2113d34e54ee731aac5990d9606d9fa
Author: Daniel P. Berrangé <berra...@redhat.com>
Date: Mon Apr 15 12:45:03 2019
usb-mtp: fix alignment of access of ObjectInfo filename field
** Affects: qemu (Ubuntu)
Importance: High
Status: Confirmed
** Changed in: qemu (Ubuntu)
Status: New => Confirmed
** Changed in: qemu (Ubuntu)
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1841457
Title:
QEMU Eoan FTBS in my machine (gcc9 + amd related ?)
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