Verified binutils 2.33-2ubuntu1.2 by rebuilding gzip in the Bileto PPA with new binutils and checking the rebuilt gzip binary:
root@ee-dwz:~# wget https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/3878/+build/18334107/+files/gzip_1.10-0ubuntu3.1_amd64.deb --2019-12-20 17:50:02-- https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/3878/+build/18334107/+files/gzip_1.10-0ubuntu3.1_amd64.deb Resolving launchpad.net (launchpad.net)... 91.189.89.222, 91.189.89.223, 2001:67c:1560:8003::8003, ... Connecting to launchpad.net (launchpad.net)|91.189.89.222|:443... connected. HTTP request sent, awaiting response... 303 See Other Location: https://launchpadlibrarian.net/456546671/gzip_1.10-0ubuntu3.1_amd64.deb [following] --2019-12-20 17:50:03-- https://launchpadlibrarian.net/456546671/gzip_1.10-0ubuntu3.1_amd64.deb Resolving launchpadlibrarian.net (launchpadlibrarian.net)... 91.189.89.228, 91.189.89.229, 2001:67c:1560:8003::8007, ... Connecting to launchpadlibrarian.net (launchpadlibrarian.net)|91.189.89.228|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 95292 (93K) [application/x-debian-package] Saving to: ‘gzip_1.10-0ubuntu3.1_amd64.deb’ gzip_1.10-0ubuntu3.1_amd64.deb 100%[=========================================================================================>] 93.06K --.-KB/s in 0.1s 2019-12-20 17:50:03 (715 KB/s) - ‘gzip_1.10-0ubuntu3.1_amd64.deb’ saved [95292/95292] root@ee-dwz:~# apt install ./gzip_1.10-0ubuntu3.1_amd64.deb Reading package lists... Done Building dependency tree Reading state information... Done Note, selecting 'gzip' instead of './gzip_1.10-0ubuntu3.1_amd64.deb' gzip is already the newest version (1.10-0ubuntu3.1). The following package was automatically installed and is no longer required: libdumbnet1 Use 'apt autoremove' to remove it. 0 upgraded, 0 newly installed, 0 to remove and 8 not upgraded. root@ee-dwz:~# FILE=/usr/bin/gzip; readelf -W --program-headers $FILE | awk -v size=$(stat -c %s $FILE) '/^ LOAD/ {if (strtonum($2) > size) {print "wrong offset ("$2" ("strtonum($2)") points past EOF:" size; exit 1;}}' root@ee-dwz:~# echo $? 0 root@ee-dwz:~# FILE=/usr/bin/gzip; readelf -W --program-headers $FILE Elf file type is DYN (Shared object file) Entry point 0x4190 There are 14 program headers, starting at offset 64 Program Headers: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align PHDR 0x000040 0x0000000000000040 0x0000000000000040 0x000310 0x000310 R 0x8 INTERP 0x000350 0x0000000000000350 0x0000000000000350 0x00001c 0x00001c R 0x1 [Requesting program interpreter: /lib64/ld-linux-x86-64.so.2] LOAD 0x000000 0x0000000000000000 0x0000000000000000 0x0027a0 0x0027a0 R 0x1000 LOAD 0x003000 0x0000000000003000 0x0000000000003000 0x00ea05 0x00ea05 R E 0x1000 LOAD 0x012000 0x0000000000012000 0x0000000000012000 0x003e80 0x003e80 R 0x1000 LOAD 0x016690 0x0000000000017690 0x0000000000017690 0x000d70 0x000d70 RW 0x1000 LOAD 0x000000 0x000000000001a000 0x000000000001a000 0x000000 0x0ca048 RW 0x1000 DYNAMIC 0x016b80 0x0000000000017b80 0x0000000000017b80 0x0001f0 0x0001f0 RW 0x8 NOTE 0x000370 0x0000000000000370 0x0000000000000370 0x000020 0x000020 R 0x8 NOTE 0x000390 0x0000000000000390 0x0000000000000390 0x000044 0x000044 R 0x4 GNU_PROPERTY 0x000370 0x0000000000000370 0x0000000000000370 0x000020 0x000020 R 0x8 GNU_EH_FRAME 0x01433c 0x000000000001433c 0x000000000001433c 0x000404 0x000404 R 0x4 GNU_STACK 0x000000 0x0000000000000000 0x0000000000000000 0x000000 0x000000 RW 0x10 GNU_RELRO 0x016690 0x0000000000017690 0x0000000000017690 0x000970 0x000970 R 0x1 Section to Segment mapping: Segment Sections... 00 01 .interp 02 .interp .note.gnu.property .note.gnu.build-id .note.ABI-tag .gnu.hash .dynsym .dynstr .gnu.version .gnu.version_r .rela.dyn .rela.plt 03 .init .plt .plt.got .plt.sec .text .fini 04 .rodata .eh_frame_hdr .eh_frame 05 .init_array .fini_array .data.rel.ro .dynamic .got .data 06 .bss 07 .dynamic 08 .note.gnu.property 09 .note.gnu.build-id .note.ABI-tag 10 .note.gnu.property 11 .eh_frame_hdr 12 13 .init_array .fini_array .data.rel.ro .dynamic .got root@ee-dwz:~# ** Description changed: - IMPORTANT: Binutils was accidentally built in -proposed instead of in a - PPA. I'm rebuilding it in https://launchpad.net/~ci-train-ppa- - service/+archive/ubuntu/3877 for the -security pocket. - [Impact] * Running gzip on WSL1 results in the following error: $ gzip -bash: /bin/gzip: cannot execute binary file: Exec format error * The error occurs frequently in package updates and makes gzip inoperable on WSL1 * The problem is caused by PT_LOAD offset pointing past the end of file and the fix is fixing strip to not generate such ELF files and recompiling gzip with the fixed strip. [Test Case] * Check the gzip binary for wrong offset: $ FILE=/usr/bin/gzip; readelf -W --program-headers $FILE | awk -v size=$(stat -c %s $FILE) '/^ LOAD/ {if (strtonum($2) > size) {print "wrong offset ("$2" ("strtonum($2)") points past EOF:" size; exit 1;}}' [ Regression Potential ] * The binutils fix could cause binutils to generate invalid ELF files. The fix is very small and isolated and has been tested and accepted by upstream, which makes such problems unlikely. * Bugs in the toolchain in general can make the rebuilt gzip show new errors, but this generally applies to many SRUs and security updates. The testing period in proposed should mitigate this risk. + + [Other Info] + + * Binutils 2.33.1-6ubuntu1.1 was accidentally built in -proposed + instead of in a PPA. I've rebuilt it in https://launchpad.net/~ci-train- + ppa-service/+archive/ubuntu/3878 for the -security pocket as + 2.33-2ubuntu1.2. [Originial Bug Text] Summary: Running gzip on WSL1 results in the following error: $ gzip -bash: /bin/gzip: cannot execute binary file: Exec format error What I expect to happen: gzip executes correctly on WSL1. What happens instead: gzip fails with an Exec format error. Notes: I suspect a change in how gzip is being built for Eoan is causing issues with ELF parsing on the WSL1 translation layer. For example: On Disco with gzip 1.9-3: $ file /bin/gzip /bin/gzip: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, BuildID[sha1]=efa859c26eaf8e035efe9a139361e2a60cd17b3e, stripped On Eoan with gzip 1.10-0ubuntu3: $ file /bin/gzip /bin/gzip: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=bc0f5994544c2a469d04c914bf4bf44b4ded6040, for GNU/Linux 3.2.0, stripped Eoan ships with gzip 1.10, while Disco ships with gzip 1.9, but I do not believe this is an issue in 1.10 because this error does not occur when building gzip from GNU project source on Ubuntu Eoan. Justifications: WSL1 will need to be patched in future Windows builds for this change in ELF. However that patch will likely not be backported to older builds of Windows, including Windows Enterprise/Server 2019. To ensure Eoan can run on current and older builds of Windows Ubuntu should consider looking at how it's building gzip and see if it can be made to 'play nice' until WSL1 can be updated. This was originally reported here: https://github.com/microsoft/WSL/issues/4461 Details: Description: Ubuntu Eoan Ermine (development branch) Release: 19.10 gzip: Installed: 1.10-0ubuntu3 Candidate: 1.10-0ubuntu3 Version table: *** 1.10-0ubuntu3 500 500 http://archive.ubuntu.com/ubuntu eoan/main amd64 Packages 100 /var/lib/dpkg/status ** Tags removed: verification-needed verification-needed-eoan ** Tags added: verification-done verification-done-eoan -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1843479 Title: gzip in Ubuntu Eoan results in Exec format error on WSL1 To manage notifications about this bug go to: https://bugs.launchpad.net/binutils/+bug/1843479/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
