From: Dmitry Vyukov <dvyukov@google.com>
To: Daniel Axtens <dja@axtens.net>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>, Qian Cai <cai@lca.pw>,
kasan-dev <kasan-dev@googlegroups.com>,
Linux-MM <linux-mm@kvack.org>,
"the arch/x86 maintainers" <x86@kernel.org>,
Alexander Potapenko <glider@google.com>,
Andy Lutomirski <luto@kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Christophe Leroy <christophe.leroy@c-s.fr>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
Vasily Gorbik <gor@linux.ibm.com>
Subject: Re: [PATCH v11 1/4] kasan: support backing vmalloc space with real shadow memory
Date: Fri, 29 Nov 2019 13:15:28 +0100 [thread overview]
Message-ID: <CACT4Y+bOBUDO9BuPQ4PX6e42_skqsWfXdfojgX+yx8RX2DGHzA@mail.gmail.com> (raw)
In-Reply-To: <874kymg9zc.fsf@dja-thinkpad.axtens.net>
On Fri, Nov 29, 2019 at 1:09 PM Daniel Axtens <dja@axtens.net> wrote:
>
> Hi Dmitry,
>
> >> I am testing this support on next-20191129 and seeing the following warnings:
> >>
> >> BUG: sleeping function called from invalid context at mm/page_alloc.c:4681
> >> in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 44, name: kworker/1:1
> >> 4 locks held by kworker/1:1/44:
> >> #0: ffff888067c26d28 ((wq_completion)events){+.+.}, at:
> >> __write_once_size include/linux/compiler.h:247 [inline]
> >> #0: ffff888067c26d28 ((wq_completion)events){+.+.}, at:
> >> arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
> >> #0: ffff888067c26d28 ((wq_completion)events){+.+.}, at: atomic64_set
> >> include/asm-generic/atomic-instrumented.h:868 [inline]
> >> #0: ffff888067c26d28 ((wq_completion)events){+.+.}, at:
> >> atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
> >> #0: ffff888067c26d28 ((wq_completion)events){+.+.}, at: set_work_data
> >> kernel/workqueue.c:615 [inline]
> >> #0: ffff888067c26d28 ((wq_completion)events){+.+.}, at:
> >> set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline]
> >> #0: ffff888067c26d28 ((wq_completion)events){+.+.}, at:
> >> process_one_work+0x88b/0x1750 kernel/workqueue.c:2235
> >> #1: ffffc900002afdf0 (pcpu_balance_work){+.+.}, at:
> >> process_one_work+0x8c0/0x1750 kernel/workqueue.c:2239
> >> #2: ffffffff8943f080 (pcpu_alloc_mutex){+.+.}, at:
> >> pcpu_balance_workfn+0xcc/0x13e0 mm/percpu.c:1845
> >> #3: ffffffff89450c78 (vmap_area_lock){+.+.}, at: spin_lock
> >> include/linux/spinlock.h:338 [inline]
> >> #3: ffffffff89450c78 (vmap_area_lock){+.+.}, at:
> >> pcpu_get_vm_areas+0x1449/0x3df0 mm/vmalloc.c:3431
> >> Preemption disabled at:
> >> [<ffffffff81a84199>] spin_lock include/linux/spinlock.h:338 [inline]
> >> [<ffffffff81a84199>] pcpu_get_vm_areas+0x1449/0x3df0 mm/vmalloc.c:3431
> >> CPU: 1 PID: 44 Comm: kworker/1:1 Not tainted 5.4.0-next-20191129+ #5
> >> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.12.0-1 04/01/2014
> >> Workqueue: events pcpu_balance_workfn
> >> Call Trace:
> >> __dump_stack lib/dump_stack.c:77 [inline]
> >> dump_stack+0x199/0x216 lib/dump_stack.c:118
> >> ___might_sleep.cold.97+0x1f5/0x238 kernel/sched/core.c:6800
> >> __might_sleep+0x95/0x190 kernel/sched/core.c:6753
> >> prepare_alloc_pages mm/page_alloc.c:4681 [inline]
> >> __alloc_pages_nodemask+0x3cd/0x890 mm/page_alloc.c:4730
> >> alloc_pages_current+0x10c/0x210 mm/mempolicy.c:2211
> >> alloc_pages include/linux/gfp.h:532 [inline]
> >> __get_free_pages+0xc/0x40 mm/page_alloc.c:4786
> >> kasan_populate_vmalloc_pte mm/kasan/common.c:762 [inline]
> >> kasan_populate_vmalloc_pte+0x2f/0x1b0 mm/kasan/common.c:753
> >> apply_to_pte_range mm/memory.c:2041 [inline]
> >> apply_to_pmd_range mm/memory.c:2068 [inline]
> >> apply_to_pud_range mm/memory.c:2088 [inline]
> >> apply_to_p4d_range mm/memory.c:2108 [inline]
> >> apply_to_page_range+0x5ca/0xa00 mm/memory.c:2133
> >> kasan_populate_vmalloc+0x69/0xa0 mm/kasan/common.c:791
> >> pcpu_get_vm_areas+0x1596/0x3df0 mm/vmalloc.c:3439
> >> pcpu_create_chunk+0x240/0x7f0 mm/percpu-vm.c:340
> >> pcpu_balance_workfn+0x1033/0x13e0 mm/percpu.c:1934
> >> process_one_work+0x9b5/0x1750 kernel/workqueue.c:2264
> >> worker_thread+0x8b/0xd20 kernel/workqueue.c:2410
> >> kthread+0x365/0x450 kernel/kthread.c:255
> >> ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
> >>
> >>
> >> Not sure if it's the same or not. Is it addressed by something in flight?
>
> It looks like this one is the same.
>
> There is a patch to fix it:
> https://lore.kernel.org/linux-mm/20191120052719.7201-1-dja@axtens.net/
>
> Andrew said he had picked it up on the 22nd:
> https://marc.info/?l=linux-mm-commits&m=157438241512561&w=2
> It's landed in mmots but not mmotm, so hopefully that will happen and
> then it will land in -next very soon!
>
> I will look into your other bug report shortly.
Thanks for the quick responses, Andrey, Daniel.
> Regards,
> Daniel
>
> >>
> >> My config:
> >> https://gist.githubusercontent.com/dvyukov/36c7be311fdec9cd51c649f7c3cb2ddb/raw/39c6f864fdd0ffc53f0822b14c354a73c1695fa1/gistfile1.txt
> >
> >
> > I've tried this fix for pcpu_get_vm_areas:
> > https://groups.google.com/d/msg/kasan-dev/t_F2X1MWKwk/h152Z3q2AgAJ
> > and it helps. But this will break syzbot on linux-next soon.
next prev parent reply other threads:[~2019-11-29 12:15 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-31 9:39 [PATCH v11 0/4] kasan: support backing vmalloc space with real shadow memory Daniel Axtens
2019-10-31 9:39 ` [PATCH v11 1/4] " Daniel Axtens
2019-11-15 16:36 ` Qian Cai
2019-11-18 3:29 ` Daniel Axtens
2019-11-19 9:54 ` Andrey Ryabinin
2019-11-29 10:43 ` Dmitry Vyukov
2019-11-29 10:58 ` Dmitry Vyukov
2019-11-29 11:02 ` Dmitry Vyukov
2019-11-29 11:38 ` Andrey Ryabinin
2019-11-29 11:47 ` Dmitry Vyukov
2019-11-29 11:53 ` Andrey Ryabinin
2019-11-29 12:29 ` Daniel Axtens
2019-11-29 12:45 ` Dmitry Vyukov
2019-11-29 15:13 ` Dmitry Vyukov
2019-11-29 15:15 ` XFS check crash (WAS Re: [PATCH v11 1/4] kasan: support backing vmalloc space with real shadow memory) Qian Cai
2019-11-29 15:50 ` Daniel Axtens
2019-11-29 12:09 ` [PATCH v11 1/4] kasan: support backing vmalloc space with real shadow memory Daniel Axtens
2019-11-29 12:15 ` Dmitry Vyukov [this message]
2019-11-20 5:27 ` [PATCH] update to "kasan: support backing vmalloc space with real shadow memory" Daniel Axtens
2019-10-31 9:39 ` [PATCH v11 2/4] kasan: add test for vmalloc Daniel Axtens
2019-10-31 9:39 ` [PATCH v11 3/4] fork: support VMAP_STACK with KASAN_VMALLOC Daniel Axtens
2019-10-31 9:39 ` [PATCH v11 4/4] x86/kasan: support KASAN_VMALLOC Daniel Axtens
2019-11-08 22:36 ` [PATCH v11 0/4] kasan: support backing vmalloc space with real shadow memory Andrey Ryabinin
2019-12-02 8:07 ` Christophe Leroy
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