linux-kernel - Re: [PATCH v6 00/37] Memory allocation profiling

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAJuCfpFtj7MVY+9FaKfq0w7N1qw8=jYifC0sBUAySk=AWBhK6Q@mail.gmail.com>
Date: Thu, 25 Apr 2024 08:39:37 -0700
From: Suren Baghdasaryan <surenb@...gle.com>
To: Kent Overstreet <kent.overstreet@...ux.dev>
Cc: Kees Cook <keescook@...omium.org>, akpm@...ux-foundation.org, mhocko@...e.com, 
	vbabka@...e.cz, hannes@...xchg.org, roman.gushchin@...ux.dev, mgorman@...e.de, 
	dave@...olabs.net, willy@...radead.org, liam.howlett@...cle.com, 
	penguin-kernel@...ove.sakura.ne.jp, corbet@....net, void@...ifault.com, 
	peterz@...radead.org, juri.lelli@...hat.com, catalin.marinas@....com, 
	will@...nel.org, arnd@...db.de, tglx@...utronix.de, mingo@...hat.com, 
	dave.hansen@...ux.intel.com, x86@...nel.org, peterx@...hat.com, 
	david@...hat.com, axboe@...nel.dk, mcgrof@...nel.org, masahiroy@...nel.org, 
	nathan@...nel.org, dennis@...nel.org, jhubbard@...dia.com, tj@...nel.org, 
	muchun.song@...ux.dev, rppt@...nel.org, paulmck@...nel.org, 
	pasha.tatashin@...een.com, yosryahmed@...gle.com, yuzhao@...gle.com, 
	dhowells@...hat.com, hughd@...gle.com, andreyknvl@...il.com, 
	ndesaulniers@...gle.com, vvvvvv@...gle.com, gregkh@...uxfoundation.org, 
	ebiggers@...gle.com, ytcoode@...il.com, vincent.guittot@...aro.org, 
	dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com, 
	bristot@...hat.com, vschneid@...hat.com, cl@...ux.com, penberg@...nel.org, 
	iamjoonsoo.kim@....com, 42.hyeyoo@...il.com, glider@...gle.com, 
	elver@...gle.com, dvyukov@...gle.com, songmuchun@...edance.com, 
	jbaron@...mai.com, aliceryhl@...gle.com, rientjes@...gle.com, 
	minchan@...gle.com, kaleshsingh@...gle.com, kernel-team@...roid.com, 
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, 
	iommu@...ts.linux.dev, linux-arch@...r.kernel.org, 
	linux-fsdevel@...r.kernel.org, linux-mm@...ck.org, 
	linux-modules@...r.kernel.org, kasan-dev@...glegroups.com, 
	cgroups@...r.kernel.org
Subject: Re: [PATCH v6 00/37] Memory allocation profiling

On Wed, Apr 24, 2024 at 8:26 PM Kent Overstreet
<kent.overstreet@...ux.dev> wrote:
>
> On Wed, Apr 24, 2024 at 06:59:01PM -0700, Kees Cook wrote:
> > On Thu, Mar 21, 2024 at 09:36:22AM -0700, Suren Baghdasaryan wrote:
> > > Low overhead [1] per-callsite memory allocation profiling. Not just for
> > > debug kernels, overhead low enough to be deployed in production.
> >
> > Okay, I think I'm holding it wrong. With next-20240424 if I set:
> >
> > CONFIG_CODE_TAGGING=y
> > CONFIG_MEM_ALLOC_PROFILING=y
> > CONFIG_MEM_ALLOC_PROFILING_ENABLED_BY_DEFAULT=y
> >
> > My test system totally freaks out:
> >
> > ...
> > SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
> > Oops: general protection fault, probably for non-canonical address 0xc388d881e4808550: 0000 [#1] PREEMPT SMP NOPTI
> > CPU: 0 PID: 0 Comm: swapper Not tainted 6.9.0-rc5-next-20240424 #1
> > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 0.0.0 02/06/2015
> > RIP: 0010:__kmalloc_node_noprof+0xcd/0x560
> >
> > Which is:
> >
> > __kmalloc_node_noprof+0xcd/0x560:
> > __slab_alloc_node at mm/slub.c:3780 (discriminator 2)
> > (inlined by) slab_alloc_node at mm/slub.c:3982 (discriminator 2)
> > (inlined by) __do_kmalloc_node at mm/slub.c:4114 (discriminator 2)
> > (inlined by) __kmalloc_node_noprof at mm/slub.c:4122 (discriminator 2)
> >
> > Which is:
> >
> >         tid = READ_ONCE(c->tid);
> >
> > I haven't gotten any further than that; I'm EOD. Anyone seen anything
> > like this with this series?
>
> I certainly haven't. That looks like some real corruption, we're in slub
> internal data structures and derefing a garbage address. Check kasan and
> all that?

Hi Kees,
I tested next-20240424 yesterday with defconfig and
CONFIG_MEM_ALLOC_PROFILING enabled but didn't see any issue like that.
Could you share your config file please?
Thanks,
Suren.