From: Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>
To: maciej.czekaj@caviumnetworks.com, david.marchand@6wind.com
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] eal: fix crash on mmap error in rte_eal_hugepage_attach()
Date: Mon, 3 Oct 2016 14:04:11 +0100 [thread overview]
Message-ID: <6c2618d5-3f54-7c84-aa92-498461842f6a@intel.com> (raw)
In-Reply-To: <1475059977-27370-1-git-send-email-maciej.czekaj@caviumnetworks.com>
On 28/09/2016 11:52, maciej.czekaj@caviumnetworks.com wrote:
> From: Maciej Czekaj <maciej.czekaj@caviumnetworks.com>
>
> In ASLR-enabled system, it is possible that selected
> virtual space is occupied by program segments. Therefore,
> error path should not blindly unmap all memmory segments
> but only those already mapped.
>
> Steps that lead to crash:
> 1. memeseg 0 in secondary process overlaps
> with libc.so
> 2. mmap of /dev/zero fails for virtual space of memseg 0
> 3. munmap of memseg 0 leads to unmapping libc.so itself
> 4. app gets SIGSEGV after returning from syscall to libc
>
> Fixes: ea329d7f8e34 ("mem: fix leak after mapping failure")
>
> Signed-off-by: Maciej Czekaj <maciej.czekaj@caviumnetworks.com>
> ---
> lib/librte_eal/linuxapp/eal/eal_memory.c | 11 ++++++-----
> 1 file changed, 6 insertions(+), 5 deletions(-)
Acked-by: Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>
next prev parent reply other threads:[~2016-10-03 13:04 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-28 10:52 maciej.czekaj
2016-10-03 13:04 ` Sergio Gonzalez Monroy [this message]
2016-10-03 14:06 ` Thomas Monjalon
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=6c2618d5-3f54-7c84-aa92-498461842f6a@intel.com \
--to=sergio.gonzalez.monroy@intel.com \
--cc=david.marchand@6wind.com \
--cc=dev@dpdk.org \
--cc=maciej.czekaj@caviumnetworks.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.
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).