From: Andrey Konovalov <andreyknvl@gmail.com>
To: Alexander Potapenko <glider@google.com>,
Anders Roxell <anders.roxell@linaro.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
andrey.konovalov@linux.dev, Marco Elver <elver@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
Vlastimil Babka <vbabka@suse.cz>,
kasan-dev@googlegroups.com,
Evgenii Stepanov <eugenis@google.com>,
Oscar Salvador <osalvador@suse.de>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Andrey Konovalov <andreyknvl@google.com>,
arnd@arndb.de, sfr@canb.auug.org.au
Subject: Re: [PATCH v2 12/19] lib/stackdepot: use list_head for stack record links
Date: Mon, 23 Oct 2023 18:17:40 +0200 [thread overview]
Message-ID: <CA+fCnZfRh=a1VQx7CaHAjTQw9888jxFHB0dJv5hkBW6v3njdkQ@mail.gmail.com> (raw)
In-Reply-To: <CAG_fn=W0OO4GGS0-pnHFpnWGsBN3dZJ9tnRxPmEKRkkP4Vh48A@mail.gmail.com>
On Mon, Oct 9, 2023 at 2:16 PM Alexander Potapenko <glider@google.com> wrote:
>
> On Sat, Sep 16, 2023 at 10:04 PM Andrew Morton
> <akpm@linux-foundation.org> wrote:
> >
> > On Sat, 16 Sep 2023 19:43:35 +0200 Anders Roxell <anders.roxell@linaro.org> wrote:
> >
> > > On 2023-09-13 19:14, andrey.konovalov@linux.dev wrote:
> > > > From: Andrey Konovalov <andreyknvl@google.com>
> > > >
> > > > Switch stack_record to use list_head for links in the hash table
> > > > and in the freelist.
> > > >
> > > > This will allow removing entries from the hash table buckets.
> > > >
> > > > This is preparatory patch for implementing the eviction of stack records
> > > > from the stack depot.
> > > >
> > > > Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
> > > >
> > >
> > > Building on an arm64 kernel from linux-next tag next-20230915, and boot
> > > that in QEMU. I see the following kernel panic.
> > >
> > > ...
> > >
> > > The full log can be found [1] and the .config file [2]. I bisected down
> > > to this commit, see the bisect log [3].
>
> I am also seeing similar crashes on an x86 KMSAN build.
>
> They are happening when in the following code:
>
> list_for_each(pos, bucket) {
> found = list_entry(pos, struct stack_record, list);
> if (found->hash == hash &&
> found->size == size &&
> !stackdepot_memcmp(entries, found->entries, size))
> return found;
> }
>
> `found` is NULL
>
> @Andrey, could you please take a look?
Found a bug, will fix in v3. Thank you!
next prev parent reply other threads:[~2023-10-23 16:17 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-13 17:14 [PATCH v2 00/19] stackdepot: allow evicting stack traces andrey.konovalov
2023-09-13 17:14 ` [PATCH v2 01/19] lib/stackdepot: check disabled flag when fetching andrey.konovalov
2023-09-13 17:14 ` [PATCH v2 02/19] lib/stackdepot: simplify __stack_depot_save andrey.konovalov
2023-09-13 17:14 ` [PATCH v2 03/19] lib/stackdepot: drop valid bit from handles andrey.konovalov
2023-09-13 17:14 ` [PATCH v2 04/19] lib/stackdepot: add depot_fetch_stack helper andrey.konovalov
2023-09-13 17:14 ` [PATCH v2 05/19] lib/stackdepot: use fixed-sized slots for stack records andrey.konovalov
2023-09-15 8:55 ` Marco Elver
2023-09-15 16:46 ` Andrey Konovalov
2023-09-13 17:14 ` [PATCH v2 06/19] lib/stackdepot: fix and clean-up atomic annotations andrey.konovalov
2023-10-06 16:14 ` Alexander Potapenko
2023-10-06 17:21 ` Alexander Potapenko
2023-10-23 16:15 ` Andrey Konovalov
2023-09-13 17:14 ` [PATCH v2 07/19] lib/stackdepot: rework helpers for depot_alloc_stack andrey.konovalov
2023-10-09 8:59 ` Alexander Potapenko
2023-10-09 9:35 ` Alexander Potapenko
2023-10-23 16:16 ` Andrey Konovalov
2023-09-13 17:14 ` [PATCH v2 08/19] lib/stackdepot: rename next_pool_required to new_pool_required andrey.konovalov
2023-09-13 17:14 ` [PATCH v2 09/19] lib/stackdepot: store next pool pointer in new_pool andrey.konovalov
2023-09-19 16:13 ` Alexander Potapenko
2023-09-13 17:14 ` [PATCH v2 10/19] lib/stackdepot: store free stack records in a freelist andrey.konovalov
2023-10-09 9:32 ` Alexander Potapenko
2023-09-13 17:14 ` [PATCH v2 11/19] lib/stackdepot: use read/write lock andrey.konovalov
2023-10-09 9:45 ` Alexander Potapenko
2023-10-23 16:16 ` Andrey Konovalov
2023-09-13 17:14 ` [PATCH v2 12/19] lib/stackdepot: use list_head for stack record links andrey.konovalov
2023-09-16 17:43 ` Anders Roxell
2023-09-16 20:04 ` Andrew Morton
2023-10-09 12:15 ` Alexander Potapenko
2023-10-23 16:17 ` Andrey Konovalov [this message]
2023-09-13 17:14 ` [PATCH v2 13/19] kmsan: use stack_depot_save instead of __stack_depot_save andrey.konovalov
2023-10-09 10:00 ` Alexander Potapenko
2023-09-13 17:14 ` [PATCH v2 14/19] lib/stackdepot, kasan: add flags to __stack_depot_save and rename andrey.konovalov
2023-09-15 20:31 ` Marco Elver
2023-09-15 23:42 ` Andrey Konovalov
2023-10-09 10:09 ` Alexander Potapenko
2023-10-23 16:17 ` Andrey Konovalov
2023-09-13 17:14 ` [PATCH v2 15/19] lib/stackdepot: add refcount for records andrey.konovalov
2023-10-09 11:40 ` Alexander Potapenko
2023-09-13 17:14 ` [PATCH v2 16/19] lib/stackdepot: allow users to evict stack traces andrey.konovalov
2023-09-13 17:14 ` [PATCH v2 17/19] kasan: remove atomic accesses to stack ring entries andrey.konovalov
2023-10-09 12:05 ` Alexander Potapenko
2023-10-23 16:17 ` Andrey Konovalov
2023-09-13 17:14 ` [PATCH v2 18/19] kasan: check object_size in kasan_complete_mode_report_info andrey.konovalov
2023-10-09 12:17 ` Alexander Potapenko
2023-09-13 17:14 ` [PATCH v2 19/19] kasan: use stack_depot_put for tag-based modes andrey.konovalov
2023-10-09 12:24 ` Alexander Potapenko
2023-10-23 16:17 ` Andrey Konovalov
2023-10-05 20:35 ` [PATCH v2 00/19] stackdepot: allow evicting stack traces Andrey Konovalov
2023-10-09 12:35 ` Marco Elver
2023-10-09 19:39 ` Andrey Konovalov
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