Your message dated Tue, 16 Feb 2021 09:36:54 +0000
with message-id <[email protected]>
and subject line Bug#970460: fixed in qemu 1:5.2+dfsg-6
has caused the Debian Bug report #970460,
regarding qemu-user: trashes argv[0] breaking multi-call binaries
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
970460: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=970460
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: qemu-user
Version: 1:5.1+dfsg-4
Severity: important
X-Debbugs-Cc: [email protected], [email protected]
I’m attaching a test program that does the following:
• if argv[1] is "-" it just outputs argv[0] and argv[1]
• otherwise it also execve(2)s argv[1] with its argv[0] set to "meow"
I’ve installed the extra packages:
• gcc-arm-linux-gnueabi
• libc6-dev-armel-cross
tglase@tglase-nb:~ $ gcc -Wall -Wextra -o native tst.c
1|tglase@tglase-nb:~ $ ./native ./native
argv[0]: ./native
argv[1]: ./native
calling...
argv[0]: meow
argv[1]: -
not calling
tglase@tglase-nb:~ $ arm-linux-gnueabi-gcc -o cross tst.c -static
tglase@tglase-nb:~ $ ./cross ./cross
argv[0]: ./cross
argv[1]: ./cross
calling...
argv[0]: ./cross
argv[1]: -
not calling
tglase@tglase-nb:~ $ ./cross ./native
argv[0]: ./cross
argv[1]: ./native
calling...
argv[0]: meow
argv[1]: -
not calling
tglase@tglase-nb:~ $ ./native ./cross
argv[0]: ./native
argv[1]: ./cross
calling...
argv[0]: ./cross
argv[1]: -
not calling
As you can see, if the callee of an exec is a qemu-user target,
argv[0] is trashed.
This, among other things, makes qemu-user-static-based buildds unworkable.
-- System Information:
Debian Release: bullseye/sid
APT prefers unstable-debug
APT policy: (500, 'unstable-debug'), (500, 'oldstable-updates'), (500,
'buildd-unstable'), (500, 'unstable'), (500, 'oldstable'), (1,
'experimental-debug'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 5.7.0-2-amd64 (SMP w/2 CPU threads)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/lksh
Init: sysvinit (via /sbin/init)
Versions of packages qemu-user depends on:
ii libc6 2.31-3
ii libcapstone3 4.0.1+really+3.0.5-2
ii libgcc-s1 10.2.0-7
ii libglib2.0-0 2.66.0-1
ii libgnutls30 3.6.15-2
ii libstdc++6 10.2.0-7
ii zlib1g 1:1.2.11.dfsg-2
Versions of packages qemu-user recommends:
ii qemu-user-static [qemu-user-binfmt] 1:5.1+dfsg-4
Versions of packages qemu-user suggests:
ii sudo 1.9.1-2
-- no debconf information
#include <err.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
int
main(int argc, char *argv[], char *envp[])
{
char *newargv[3];
if (argc != 2) {
fprintf(stderr, "usage: %s <program-to-call>\n", argv[0]);
return (1);
}
printf("argv[%d]: %s\n", 0, argv[0]);
printf("argv[%d]: %s\n", 1, argv[1]);
if (strcmp(argv[1], "-") != 0) {
printf("calling...\n");
newargv[0] = "meow";
newargv[1] = "-";
newargv[2] = NULL;
execve(argv[1], newargv, envp);
err(1, "exec");
}
printf("not calling\n");
return (0);
}
--- End Message ---
--- Begin Message ---
Source: qemu
Source-Version: 1:5.2+dfsg-6
Done: Michael Tokarev <[email protected]>
We believe that the bug you reported is fixed in the latest version of
qemu, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Michael Tokarev <[email protected]> (supplier of updated qemu package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
Format: 1.8
Date: Tue, 16 Feb 2021 12:11:20 +0300
Source: qemu
Architecture: source
Version: 1:5.2+dfsg-6
Distribution: unstable
Urgency: medium
Maintainer: Debian QEMU Team <[email protected]>
Changed-By: Michael Tokarev <[email protected]>
Closes: 901197 970460
Changes:
qemu (1:5.2+dfsg-6) unstable; urgency=medium
.
* deprecate qemu-debootstrap. It is not needed anymore with
binfmt F flag, since everything now works without --foreign
debootstrap argument and copying the right qemu binary into
the chroot. Closes: #901197
* fix the brown-paper bag bug: wrong argument order
in the linux-user-binfmt patch (really closes: #970460)
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--- End Message ---
