From: Florian Westphal <fw@strlen.de>
To: stable@vger.kernel.org
Cc: pablo@netfilter.org, paulburton@kernel.org
Subject: stable request: mips strncpy is broken
Date: Wed, 3 Mar 2021 18:23:36 +0100 [thread overview]
Message-ID: <20210303172336.GF17911@breakpoint.cc> (raw)
Hello,
Please consider queueing
commit 3c0be5849259b729580c23549330973a2dd513a2
Author: Paul Burton <paulburton@kernel.org>
MIPS: Drop 32-bit asm string functions
The commit is part of 5.5-rc1.
We got a bug report about following nftables rule not matching
even if it should on Linux 5.4.y mips32:
meta iifname "br-vlan"
'iifname' uses strncpy(..., IFNAMSIZ) to copy dev->name to the register.
The MIPS asm function doesn't zero-pad the remaining bytes, but that is
needed for the compare op to work reliably.
The reporter confirmed that this removal fixes the issue, the generic C
version behaves as expected.
The patch doesn't apply cleanly to 5.4, there is a minor conflict
related to FORTIFY macro, but its easily resolved as all code
is removed.
I did not try earlier 4.4.y releases but I susepct they should also get
this patch applied.
I can send a 5.4.y backport if thats preferred.
Thanks.
next reply other threads:[~2021-03-04 0:34 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-03 17:23 Florian Westphal [this message]
2021-03-04 13:26 ` stable request: mips strncpy is broken Greg KH
2021-03-04 13:43 ` Florian Westphal
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=20210303172336.GF17911@breakpoint.cc \
--to=fw@strlen.de \
--cc=pablo@netfilter.org \
--cc=paulburton@kernel.org \
--cc=stable@vger.kernel.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox