GNU bug report logs - #41264
Bootstrap packages fail to build.

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Package: guix; Reported by: Mathieu Othacehe <othacehe@HIDDEN>; dated Thu, 14 May 2020 15:18:02 UTC; Maintainer for guix is bug-guix@HIDDEN.

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From: Mathieu Othacehe <othacehe@HIDDEN>
To: bug-guix@HIDDEN
Subject: Bootstrap packages fail to build.
Date: Thu, 14 May 2020 17:17:47 +0200
Message-ID: <87h7wik0kk.fsf@HIDDEN>
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--=-=-=
Content-Type: text/plain


Hello,

This command fails on one of my systems:

--8<---------------cut here---------------start------------->8---
guix build  -e "(@@ (gnu packages commencement) glibc-mesboot0)"
--8<---------------cut here---------------end--------------->8---

with the following error:

--8<---------------cut here---------------start------------->8---
phase `unpack' succeeded after 11.8 seconds
starting phase `apply-boot-patch'
patch: **** fstatsterror: unknown error:  
command "patch" "--force" "-p1" "-i" "/gnu/store/pfz4y5i7krlvam2m8lpddmg9vi44rpqh-glibc-boot-2.2.5.patch" failed with status 2
note: keeping build directory `/tmp/guix-build-glibc-mesboot0-2.2.5.drv-1'
builder for `/gnu/store/jcqggqckhiq43y2ivlfhpkbfbp2vyjlc-glibc-mesboot0-2.2.5.drv' failed with exit code 1
build of /gnu/store/jcqggqckhiq43y2ivlfhpkbfbp2vyjlc-glibc-mesboot0-2.2.5.drv failed
View build log at '/var/log/guix/drvs/jc/qggqckhiq43y2ivlfhpkbfbp2vyjlc-glibc-mesboot0-2.2.5.drv.bz2'.
guix build: error: build of `/gnu/store/jcqggqckhiq43y2ivlfhpkbfbp2vyjlc-glibc-mesboot0-2.2.5.drv' failed
--8<---------------cut here---------------end--------------->8---

Here's a stracing of the failing "patch" command:

--8<---------------cut here---------------start------------->8---
open("/gnu/store/pfz4y5i7krlvam2m8lpddmg9vi44rpqh-glibc-boot-2.2.5.patch", O_RDONLY) = 3
brk(0x9377913)                          = 0x9377913
fstat(3, 0xffb29328)                    = -1 EOVERFLOW (Value too large for defined data type)
--8<---------------cut here---------------end--------------->8---

"patch-mesboot" is built for 32 bits. Hence, it can be using
"__ia32_sys_fstat", "__ia32_compat_sys_newfstat" or
"__ia32_compat_sys_x86_fstat64" syscall for "fstat". Here, according to
perf, it's using __ia32_compat_sys_newfstat which is overflowing on my
file system (inode count to high or so).

There's a little demonstration program attached. When built with `gcc
-m32 test.c', I have:

--8<---------------cut here---------------start------------->8---
fstat(3, 0xffad5874)                    = -1 EOVERFLOW (Value too large for defined data type)
fstat64(3, {st_mode=S_IFDIR|0555, st_size=4096, ...}) = 0
fstat64(3, {st_mode=S_IFDIR|0555, st_size=4096, ...}) = 0
--8<---------------cut here---------------end--------------->8---

So I think somehow, bootstrap packages use the legacy "fstat" syscall,
which may overflow on a 64 bits system.

WDYT,

Thanks,

Mathieu

--=-=-=
Content-Type: text/x-csrc
Content-Disposition: inline; filename=t.c

#define _GNU_SOURCE
#include <unistd.h>
#include <sys/syscall.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/sysmacros.h>

int
main(int argc, char *argv[])
{
    struct stat sb;

    if (argc != 2) {
        fprintf(stderr, "Usage: %s <pathname>\n", argv[0]);
        exit(EXIT_FAILURE);
    }

    int fd = open(argv[1], O_RDONLY);
    syscall(__NR_fstat, fd, &sb);
    syscall(__NR_fstat64, fd, &sb);
    fstat(fd, &sb);


    exit(EXIT_SUCCESS);
}

--=-=-=--




Acknowledgement sent to Mathieu Othacehe <othacehe@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-guix@HIDDEN. Full text available.
Report forwarded to bug-guix@HIDDEN:
bug#41264; Package guix. Full text available.
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Last modified: Thu, 14 May 2020 15:30:02 UTC

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