* [Qemu-devel] [Bug 1761153] [NEW] qemu-user incorrect mmap for large files on 64bits host and 32bits executable.
@ 2018-04-04 12:38 Matthieu Gautier
2020-11-10 15:42 ` [Bug 1761153] " Thomas Huth
2021-01-10 4:17 ` Launchpad Bug Tracker
0 siblings, 2 replies; 3+ messages in thread
From: Matthieu Gautier @ 2018-04-04 12:38 UTC (permalink / raw)
To: qemu-devel
Public bug reported:
qemu-user seems to incorrectly mmap a file if the offset is > 4GiB and
guest binary is 32 bits elf.
See attached test program `test_mmap.c`.
```
$ gcc -g -m32 -march=i386 test_mmap.c -o test_mmap
$ file test_mmap
test_mmap: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, for GNU/Linux 3.2.0, BuildID[sha1]=e36db05f4dfd8a9cfde8a969214a242c1f5a4b49, with debug_info, not stripped
$ uname -a
Linux localhost.localdomain 4.15.10-300.fc27.x86_64 #1 SMP Thu Mar 15 17:13:04 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
$ qemu-i386 --version
qemu-i386 version 2.10.1(qemu-2.10.1-2.fc27)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
$ ./test_mmap
$ qemu-i386 test_mmap
Incorrect data 1
```
Tested with qemu-i386 packaged in Fedora 27 and qemu-i386 compiled from
git master (094b62cd9c)
The issue was firstly detected on (more complex program) using qemu-arm
(with 32bits binary) so it is probably a 32/64bits problem independently
of the cpu family.
** Affects: qemu
Importance: Undecided
Status: New
** Attachment added: "test_mmap.c"
https://bugs.launchpad.net/bugs/1761153/+attachment/5101253/+files/test_mmap.c
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1761153
Title:
qemu-user incorrect mmap for large files on 64bits host and 32bits
executable.
Status in QEMU:
New
Bug description:
qemu-user seems to incorrectly mmap a file if the offset is > 4GiB and
guest binary is 32 bits elf.
See attached test program `test_mmap.c`.
```
$ gcc -g -m32 -march=i386 test_mmap.c -o test_mmap
$ file test_mmap
test_mmap: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, for GNU/Linux 3.2.0, BuildID[sha1]=e36db05f4dfd8a9cfde8a969214a242c1f5a4b49, with debug_info, not stripped
$ uname -a
Linux localhost.localdomain 4.15.10-300.fc27.x86_64 #1 SMP Thu Mar 15 17:13:04 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
$ qemu-i386 --version
qemu-i386 version 2.10.1(qemu-2.10.1-2.fc27)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
$ ./test_mmap
$ qemu-i386 test_mmap
Incorrect data 1
```
Tested with qemu-i386 packaged in Fedora 27 and qemu-i386 compiled
from git master (094b62cd9c)
The issue was firstly detected on (more complex program) using qemu-
arm (with 32bits binary) so it is probably a 32/64bits problem
independently of the cpu family.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1761153/+subscriptions
^ permalink raw reply [flat|nested] 3+ messages in thread* [Bug 1761153] Re: qemu-user incorrect mmap for large files on 64bits host and 32bits executable.
2018-04-04 12:38 [Qemu-devel] [Bug 1761153] [NEW] qemu-user incorrect mmap for large files on 64bits host and 32bits executable Matthieu Gautier
@ 2020-11-10 15:42 ` Thomas Huth
2021-01-10 4:17 ` Launchpad Bug Tracker
1 sibling, 0 replies; 3+ messages in thread
From: Thomas Huth @ 2020-11-10 15:42 UTC (permalink / raw)
To: qemu-devel
The QEMU project is currently considering to move its bug tracking to another system. For this we need to know which bugs are still valid and which could be closed already. Thus we are setting older bugs to "Incomplete" now.
If you still think this bug report here is valid, then please switch the state back to "New" within the next 60 days, otherwise this report will be marked as "Expired". Or mark it as "Fix Released" if the problem has been solved with a newer version of QEMU already. Thank you and sorry for the inconvenience.
** Changed in: qemu
Status: New => Incomplete
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1761153
Title:
qemu-user incorrect mmap for large files on 64bits host and 32bits
executable.
Status in QEMU:
Incomplete
Bug description:
qemu-user seems to incorrectly mmap a file if the offset is > 4GiB and
guest binary is 32 bits elf.
See attached test program `test_mmap.c`.
```
$ gcc -g -m32 -march=i386 test_mmap.c -o test_mmap
$ file test_mmap
test_mmap: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, for GNU/Linux 3.2.0, BuildID[sha1]=e36db05f4dfd8a9cfde8a969214a242c1f5a4b49, with debug_info, not stripped
$ uname -a
Linux localhost.localdomain 4.15.10-300.fc27.x86_64 #1 SMP Thu Mar 15 17:13:04 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
$ qemu-i386 --version
qemu-i386 version 2.10.1(qemu-2.10.1-2.fc27)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
$ ./test_mmap
$ qemu-i386 test_mmap
Incorrect data 1
```
Tested with qemu-i386 packaged in Fedora 27 and qemu-i386 compiled
from git master (094b62cd9c)
The issue was firstly detected on (more complex program) using qemu-
arm (with 32bits binary) so it is probably a 32/64bits problem
independently of the cpu family.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1761153/+subscriptions
^ permalink raw reply [flat|nested] 3+ messages in thread* [Bug 1761153] Re: qemu-user incorrect mmap for large files on 64bits host and 32bits executable.
2018-04-04 12:38 [Qemu-devel] [Bug 1761153] [NEW] qemu-user incorrect mmap for large files on 64bits host and 32bits executable Matthieu Gautier
2020-11-10 15:42 ` [Bug 1761153] " Thomas Huth
@ 2021-01-10 4:17 ` Launchpad Bug Tracker
1 sibling, 0 replies; 3+ messages in thread
From: Launchpad Bug Tracker @ 2021-01-10 4:17 UTC (permalink / raw)
To: qemu-devel
[Expired for QEMU because there has been no activity for 60 days.]
** Changed in: qemu
Status: Incomplete => Expired
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1761153
Title:
qemu-user incorrect mmap for large files on 64bits host and 32bits
executable.
Status in QEMU:
Expired
Bug description:
qemu-user seems to incorrectly mmap a file if the offset is > 4GiB and
guest binary is 32 bits elf.
See attached test program `test_mmap.c`.
```
$ gcc -g -m32 -march=i386 test_mmap.c -o test_mmap
$ file test_mmap
test_mmap: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, for GNU/Linux 3.2.0, BuildID[sha1]=e36db05f4dfd8a9cfde8a969214a242c1f5a4b49, with debug_info, not stripped
$ uname -a
Linux localhost.localdomain 4.15.10-300.fc27.x86_64 #1 SMP Thu Mar 15 17:13:04 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
$ qemu-i386 --version
qemu-i386 version 2.10.1(qemu-2.10.1-2.fc27)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
$ ./test_mmap
$ qemu-i386 test_mmap
Incorrect data 1
```
Tested with qemu-i386 packaged in Fedora 27 and qemu-i386 compiled
from git master (094b62cd9c)
The issue was firstly detected on (more complex program) using qemu-
arm (with 32bits binary) so it is probably a 32/64bits problem
independently of the cpu family.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1761153/+subscriptions
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2021-01-10 4:27 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-04-04 12:38 [Qemu-devel] [Bug 1761153] [NEW] qemu-user incorrect mmap for large files on 64bits host and 32bits executable Matthieu Gautier
2020-11-10 15:42 ` [Bug 1761153] " Thomas Huth
2021-01-10 4:17 ` Launchpad Bug Tracker
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.