From: umarcor <1783362@bugs.launchpad.net>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] [Bug 1783362] [NEW] qemu-user-aarch64: mmap returns success (NULL, 0) instead of failure (MAP_FAILED, -1) with len==0
Date: Tue, 24 Jul 2018 16:18:17 -0000 [thread overview]
Message-ID: <153244909751.11925.3364609945591086988.malonedeb@gac.canonical.com> (raw)
Public bug reported:
As shown in https://github.com/beehive-
lab/mambo/issues/19#issuecomment-407420602, with len==0 mmap returns
success (NULL, 0) instead of failure (MAP_FAILED, -1) in a x86_64 host
executing a ELF 64-bit LSB executable, ARM aarch64 binary.
Steps to reproduce the bug:
- (cross-)compile the attached source file:
$ aarch64-linux-gnu-gcc -static -std=gnu99 -lpthread test/mmap_qemu.c -o
mmap_qemu
- Execute in a x86_64 host with qemu-user and qemu-user-binfmt:
$ ./mmap_qemu
alloc: 0
MAP_FAILED: -1
errno: 0
mmap_qemu: test/mmap_qemu.c:15: main: Assertion `alloc == MAP_FAILED' failed.
qemu: uncaught target signal 6 (Aborted) - core dumped
Aborted (core dumped)
- Execute in a ARM host without any additional dependecy:
$ ./mmap_qemu
alloc: -1
MAP_FAILED: -1
errno: 22
The bug is present in Fedora:
$ qemu-aarch64 --version
qemu-aarch64 version 2.11.2(qemu-2.11.2-1.fc28)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
$ uname -r
4.17.7-200.fc28.x86_64
And also in Ubuntu:
$ qemu-aarch64 --version
qemu-aarch64 version 2.12.0 (Debian 1:2.12+dfsg-3ubuntu3)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
$ uname -r
4.15.0-23-generic
Possibly related to:
- https://lists.freebsd.org/pipermail/freebsd-hackers/2009-July/029109.html
- https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203852
** Affects: qemu
Importance: Undecided
Status: New
** Affects: qemu (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "mmap_qemu.c"
https://bugs.launchpad.net/bugs/1783362/+attachment/5167203/+files/mmap_qemu.c
** Also affects: qemu (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1783362
Title:
qemu-user-aarch64: mmap returns success (NULL, 0) instead of failure
(MAP_FAILED, -1) with len==0
Status in QEMU:
New
Status in qemu package in Ubuntu:
New
Bug description:
As shown in https://github.com/beehive-
lab/mambo/issues/19#issuecomment-407420602, with len==0 mmap returns
success (NULL, 0) instead of failure (MAP_FAILED, -1) in a x86_64 host
executing a ELF 64-bit LSB executable, ARM aarch64 binary.
Steps to reproduce the bug:
- (cross-)compile the attached source file:
$ aarch64-linux-gnu-gcc -static -std=gnu99 -lpthread test/mmap_qemu.c
-o mmap_qemu
- Execute in a x86_64 host with qemu-user and qemu-user-binfmt:
$ ./mmap_qemu
alloc: 0
MAP_FAILED: -1
errno: 0
mmap_qemu: test/mmap_qemu.c:15: main: Assertion `alloc == MAP_FAILED' failed.
qemu: uncaught target signal 6 (Aborted) - core dumped
Aborted (core dumped)
- Execute in a ARM host without any additional dependecy:
$ ./mmap_qemu
alloc: -1
MAP_FAILED: -1
errno: 22
The bug is present in Fedora:
$ qemu-aarch64 --version
qemu-aarch64 version 2.11.2(qemu-2.11.2-1.fc28)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
$ uname -r
4.17.7-200.fc28.x86_64
And also in Ubuntu:
$ qemu-aarch64 --version
qemu-aarch64 version 2.12.0 (Debian 1:2.12+dfsg-3ubuntu3)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
$ uname -r
4.15.0-23-generic
Possibly related to:
- https://lists.freebsd.org/pipermail/freebsd-hackers/2009-July/029109.html
- https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203852
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1783362/+subscriptions
next reply other threads:[~2018-07-24 16:35 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-24 16:18 umarcor [this message]
2018-07-25 15:23 ` [Qemu-devel] [Bug 1783362] Re: qemu-user-aarch64: mmap returns success (NULL, 0) instead of failure (MAP_FAILED, -1) with len==0 umarcor
2018-07-25 16:57 ` [Qemu-devel] [Bug 1783362] Re: qemu-user: mmap should return failure (MAP_FAILED, -1) instead of success (NULL, 0) when len==0 umarcor
2018-07-25 17:19 ` umarcor
2018-07-30 2:05 ` umarcor
2018-07-31 22:57 ` umarcor
2018-08-01 7:25 ` Laurent Vivier
2018-08-01 16:03 ` umarcor
2018-08-01 16:18 ` umarcor
2018-08-08 14:54 ` umarcor
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