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Bug 1690422 - cc: Internal error: Segmentation fault (program cc1)
Summary: cc: Internal error: Segmentation fault (program cc1)
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: gcc
Version: 6.10
Hardware: x86_64
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Marek Polacek
QA Contact: Michael Petlan
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2019-03-19 12:57 UTC by Jaroslav Škarvada
Modified: 2019-03-26 16:33 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2019-03-26 16:33:26 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
pre-processed file (371.38 KB, text/plain)
2019-03-20 12:59 UTC, Jaroslav Škarvada 		no flags Details
pre-processed file (393.09 KB, text/plain)
2019-03-20 14:37 UTC, Jaroslav Škarvada 		no flags Details
Show Obsolete (1) View All

Description Jaroslav Škarvada 2019-03-19 12:57:57 UTC 
Description of problem:
When upgrading putty in EPEL to version 0.71 to fix multiple security related problems (bug 1690386 I hit internal compiler error. The same code compiles OK on RHEL-7 / Fedora. And it also compiles OK on RHEL-7 ppc64. Unfortunately I haven't time to investigate it more deep.

Version-Release number of selected component (if applicable):
gcc-4.4.7-23.el6.x86_64

How reproducible:
Always

Steps to Reproduce:
1. wget 'https://jskarvad.fedorapeople.org/putty/putty-0.71-1.el6.src.rpm'
2. rpmbuild --rebuild ./putty-0.71-1.el6.src.rpm
3.

* it may require EPEL-6 repository enabled

Actual results:
...
cc  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -DXDG_DEFAULT -std=gnu99 -Wvla -g -I.././ -I../charset/ -I../windows/ -I../unix/ -pthread -I/usr/include/gtk-2.0 -I/usr/lib64/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12   -D _FILE_OFFSET_BITS=64  -c ../sshdes.c
cc: Internal error: Segmentation fault (program cc1)
Please submit a full bug report.
See <http://bugzilla.redhat.com/bugzilla> for instructions.
make: *** [sshaes.o] Error 1
make: *** Waiting for unfinished jobs....
...

Expected results:
No error

Additional info:
Comment 2 Jaroslav Škarvada 2019-03-19 17:34:44 UTC 
(In reply to Jaroslav Škarvada from comment #0)
> Description of problem:
> When upgrading putty in EPEL to version 0.71 to fix multiple security
> related problems (bug 1690386 I hit internal compiler error. The same code
> compiles OK on RHEL-7 / Fedora. And it also compiles OK on RHEL-7 ppc64.
> Unfortunately I haven't time to investigate it more deep.
> 

I wanted to say it also compiles OK on RHEL-6 ppc64. Looks like the segfault is related to the rewrite of crypto routines in putty to gnu99 standard.
Comment 3 Jaroslav Škarvada 2019-03-19 18:14:07 UTC 
In case it's known bug, please let me know how to workaround it in the code triggering this.
Comment 4 Marek Polacek 2019-03-19 18:47:08 UTC 
Can you please provide the preprocessed source file?  Add -save-temps to
cc  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -DXDG_DEFAULT -std=gnu99 -Wvla -g -I.././ -I../charset/ -I../windows/ -I../unix/ -pthread -I/usr/include/gtk-2.0 -I/usr/lib64/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12   -D _FILE_OFFSET_BITS=64  -c ../sshdes.c

There will be no 6.11, so the only way to fix something in RHEL 6 gcc would be via 6.10.z.
Comment 5 Jaroslav Škarvada 2019-03-20 12:55:02 UTC 
(In reply to Marek Polacek from comment #4)
> Can you please provide the preprocessed source file?  Add -save-temps to
> cc  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
> -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic
> -DXDG_DEFAULT -std=gnu99 -Wvla -g -I.././ -I../charset/ -I../windows/
> -I../unix/ -pthread -I/usr/include/gtk-2.0 -I/usr/lib64/gtk-2.0/include
> -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0
> -I/usr/include/pango-1.0 -I/usr/include/glib-2.0
> -I/usr/lib64/glib-2.0/include -I/usr/include/pixman-1
> -I/usr/include/freetype2 -I/usr/include/libpng12   -D _FILE_OFFSET_BITS=64 
> -c ../sshdes.c
> 
> There will be no 6.11, so the only way to fix something in RHEL 6 gcc would
> be via 6.10.z.

Thanks for replying. Unfortunately, I was wrong with the command causing the segfault, due to the make parallelism, it's actually the following command:
# LANG=C cc  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -DXDG_DEFAULT -std=gnu99 -Wvla -g -I.././ -I../charset/ -I../windows/ -I../unix/ -pthread -I/usr/include/gtk-2.0 -I/usr/lib64/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12   -D _FILE_OFFSET_BITS=64  -c ../sshaes.c
cc: Internal error: Segmentation fault (program cc1)
Please submit a full bug report.
See <http://bugzilla.redhat.com/bugzilla> for instructions.

NP, I will provide the pre-processed files for it.

I am quite realistic about the possibility of the fix in the RHEL-6, so it would be enough for me to know how to workaround the problem in the code.
Comment 6 Jaroslav Škarvada 2019-03-20 12:57:17 UTC 
Maybe getting closer:
# LANG=C cc  -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -DXDG_DEFAULT -std=gnu99 -Wvla -g -I.././ -I../charset/ -I../windows/ -I../unix/ -pthread -I/usr/include/gtk-2.0 -I/usr/lib64/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12   -D _FILE_OFFSET_BITS=64  -c ../sshaes.c -save-temps
cc: warning: -pipe ignored because -save-temps specified
In file included from ../sshaes.c:1261:
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/include/wmmintrin.h:34:3: error: #error "AES/PCLMUL instructions not enabled"
In file included from ../sshaes.c:1262:
/usr/lib/gcc/x86_64-redhat-linux/4.4.7/include/smmintrin.h:32:3: error: #error "SSE4.1 instruction set not enabled"
Comment 7 Jaroslav Škarvada 2019-03-20 12:59:16 UTC 
Created attachment 1546057 [details]
pre-processed file
Comment 8 Jakub Jelinek 2019-03-20 13:12:24 UTC 
For so old gcc versions, I'd strongly suggest not to use #pragma GCC target before including the intrinsic headers, but instead separate whatever you want to compile with AES/SSE4.1 support into a separate source file and build that with -maes -msse4.1.
Comment 9 Jakub Jelinek 2019-03-20 13:16:53 UTC 
And because of the above errors, the preprocessed source is really useless, because the aes nor sse4.1 intrinsics aren't defined in there.
So, if -maes -msse4.1 on the command line doesn't help, please attach a new preprocessed source generated with those options.
Comment 10 Jaroslav Škarvada 2019-03-20 14:37:13 UTC 
Created attachment 1546093 [details]
pre-processed file

-maes -msse4.1 helped, new pre-processed file.
Comment 11 Jaroslav Škarvada 2019-03-20 14:37:47 UTC 
(In reply to Jaroslav Škarvada from comment #10)
> Created attachment 1546093 [details]
> pre-processed file
> 
> -maes -msse4.1 helped, new pre-processed file.

So with it compiles without internal error.
Comment 12 Jaroslav Škarvada 2019-03-20 15:04:02 UTC 
I will probably disable the accelerated code on x86. The binary should run on all RHEL-6 supported HW. And if I am not mistaken the default RHEL-6 CFLAGS doesn't include the aes, msse4.1 support (please correct me if I am wrong).
Comment 13 Jakub Jelinek 2019-03-20 15:06:50 UTC 
It depends if the functions from that TU are used unconditionally (that would be a bug that needs to be fixed) or or only conditionally, depending on what ISA flags cpuid detects (then it would be just fine).
Comment 14 Jaroslav Škarvada 2019-03-20 17:19:54 UTC 
I compiled the package in question with SW AES which workarounded the problem. So this BZ is no longer blocking me. Thanks for info.
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