From: umarcor <1783362@bugs.launchpad.net>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] [Bug 1783362] Re: qemu-user: mmap should return failure (MAP_FAILED, -1) instead of success (NULL, 0) when len==0
Date: Wed, 01 Aug 2018 16:03:18 -0000 [thread overview]
Message-ID: <153313939903.17727.1413656000420504482.launchpad@soybean.canonical.com> (raw)
In-Reply-To: 153244909751.11925.3364609945591086988.malonedeb@gac.canonical.com
** Changed in: qemu
Status: In Progress => Fix Committed
** Changed in: qemu (Ubuntu)
Status: In Progress => Fix Committed
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1783362
Title:
qemu-user: mmap should return failure (MAP_FAILED, -1) instead of
success (NULL, 0) when len==0
Status in QEMU:
Fix Committed
Status in qemu package in Ubuntu:
Fix Committed
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 prev parent reply other threads:[~2018-08-01 16:11 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-24 16:18 [Qemu-devel] [Bug 1783362] [NEW] qemu-user-aarch64: mmap returns success (NULL, 0) instead of failure (MAP_FAILED, -1) with len==0 umarcor
2018-07-25 15:23 ` [Qemu-devel] [Bug 1783362] " 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 [this message]
2018-08-01 16:18 ` umarcor
2018-08-08 14:54 ` umarcor
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=153313939903.17727.1413656000420504482.launchpad@soybean.canonical.com \
--to=1783362@bugs.launchpad.net \
--cc=qemu-devel@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
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.