From: Tobias Koch <tobias.koch@nonterra.com>
To: musl@lists.openwall.com
Subject: [musl] Crash on (qemu'ed) s390x doing prlimit call after probing stack size
Date: Wed, 26 Feb 2020 01:07:58 +0300 [thread overview]
Message-ID: <baa86ef8-df48-8fb4-7af1-df43722e3646@nonterra.com> (raw)
Hi,
I have some programs crashing on me under QEMU s390x user emulation. I
see them probe the stack size using mremaps and then do a prlimit as in
this snippet
24948 mremap(274877911040,4096,8192,0,0,56) = -1 errno=12 (Cannot
allocate memory)
24948 mremap(274877906944,4096,8192,0,0,56) = -1 errno=12 (Cannot
allocate memory)
24948 mremap(274877902848,4096,8192,0,0,56) = -1 errno=14 (Bad address)
24948 prlimit64(0,3,0,274889373840,274879934536,56) = 0
--- SIGSEGV {si_signo=SIGSEGV, si_code=1, si_addr=0x0000004000001000} ---
Segmentation fault
The same programs on other 64bit arches (such as aarch64 or powerpc64le)
emluated with QEMU work OK. I'm trying to understand, what musl is doing
here and why QEMU cannot handle it.Any pointers would be appreciated.
Tobias
next reply other threads:[~2020-02-25 22:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-25 22:07 Tobias Koch [this message]
2020-02-26 9:56 ` Szabolcs Nagy
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=baa86ef8-df48-8fb4-7af1-df43722e3646@nonterra.com \
--to=tobias.koch@nonterra.com \
--cc=musl@lists.openwall.com \
/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.
Code repositories for project(s) associated with this public inbox
https://git.vuxu.org/mirror/musl/
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).