Date: Tue, 31 Mar 2020 10:07:56 -0400 From: Ed Maste <emaste@freebsd.org> To: freebsd-reproducibility@freebsd.org Subject: Nonreproducible kernel modules on stable/12 Message-ID: <CAPyFy2Bzuk3tyrPdkw4L2xD%2BWE6qG1mRDG0hGEx0QOxw%2BXVDvA@mail.gmail.com>
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Originally reported off-list, during a stable/12 freebsd-update build
kernel modules are not reproducible and thus get included in the
update.
diffoscope reports that the .SUNW_ctf section is responsible:
--- cam.0.ko
+++ cam.1.ko
=E2=94=9C=E2=94=80=E2=94=80 readelf --wide --sections {}
...
=E2=94=82 [30] .shstrtab STRTAB 0000000000000000 0ea828
0001f8 00 0 0 1
=E2=94=82 - [31] .SUNW_ctf PROGBITS 0000000000000000 0f29d8
00e2ad 00 32 0 4
=E2=94=82 + [31] .SUNW_ctf PROGBITS 0000000000000000 0f29d8
00e2b1 00 32 0 4
=E2=94=82 [32] .symtab SYMTAB 0000000000000000 0e12b8
009570 18 33 1001 8
...
=E2=94=9C=E2=94=80=E2=94=80 readelf --wide --decompress --hex-dump=3D.SUNW_=
ctf {}
=E2=94=82 @@ -1,3630 +1,3631 @@
=E2=94=82
=E2=94=82 Hex dump of section '.SUNW_ctf':
=E2=94=82 0x00000000 f1cf0201 00000000 00000000 00000000 ...............=
.
=E2=94=82 0x00000010 08000000 96040000 fc250000 f4310100 .........%...1.=
.
=E2=94=82 - 0x00000020 6aeb0000 78dabc7d 077c54c5 16f7ccbd j...x..}.|T....=
.
=E2=94=82 - 0x00000030 774b42ca 26b48524 b0402001 02440d10 wKB.&..$.@ ..D.=
.
...
=E2=94=82 + 0x00000020 6feb0000 78dabc7d 077c54c5 16f7ccdc o...x..}.|T....=
.
=E2=94=82 + 0x00000030 bb252165 13da4242 586a0204 081820d4 .%!e..BBXj.... =
.
(And build-ID and GNU debuglink differ as a result.)
Running ctfdump and comparing the result shows the issue:
--- a 2020-03-31 10:04:39.766567000 -0400
+++ b 2020-03-31 10:04:44.663292000 -0400
@@ -11,11 +11,11 @@
cth_funcoff =3D 1174
cth_typeoff =3D 9724
cth_stroff =3D 78324
- cth_strlen =3D 60266
+ cth_strlen =3D 60271
- Label Table ------------------------------------------------------------=
----
- 2407 FreeBSD 12.1-STABLE amd64 1201512
+ 2407 FreeBSD 12.1-FUTUREBUILD amd64 1201512
- Data Objects -----------------------------------------------------------=
----
Aside, we should add ctfdump to diffoscope.
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