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Wed, 05 Jul 2023 10:18:03 -0700 (PDT) MIME-Version: 1.0 References: <5c7455db-4ed8-b54f-e2d5-d2811908123d@leemhuis.info> <2023070359-evasive-regroup-f3b8@gregkh> <2023070453-plod-swipe-cfbf@gregkh> <20230704091808.aa2ed3c11a5351d9bf217ac9@linux-foundation.org> <2023070509-undertow-pulverize-5adc@gregkh> <7668c45a-70b1-dc2f-d0f5-c0e76ec17145@leemhuis.info> <20230705084906.22eee41e6e72da588fce5a48@linux-foundation.org> In-Reply-To: From: Suren Baghdasaryan Date: Wed, 5 Jul 2023 10:17:52 -0700 Message-ID: Subject: Re: Fwd: Memory corruption in multithreaded user space program while calling fork To: Andrew Morton Cc: Linux regressions mailing list , "Linux regression tracking (Thorsten Leemhuis)" , Bagas Sanjaya , Jacob Young , Laurent Dufour , Linux Kernel Mailing List , Linux Memory Management , Linux PowerPC , Linux ARM , Greg KH Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: EAAA0160021 X-Rspam-User: X-Stat-Signature: rizfhszitegdhr1a68zug8x7wbrgxwhi X-Rspamd-Server: rspam01 X-HE-Tag: 1688577484-703027 X-HE-Meta: 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 sX09tKFG 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Jul 5, 2023 at 9:14=E2=80=AFAM Suren Baghdasaryan wrote: > > On Wed, Jul 5, 2023 at 8:49=E2=80=AFAM Andrew Morton wrote: > > > > On Wed, 5 Jul 2023 10:51:57 +0200 "Linux regression tracking (Thorsten = Leemhuis)" wrote: > > > > > >>> I'm in wait-a-few-days-mode on this. To see if we have a backpor= table > > > >>> fix rather than disabling the feature in -stable. > > > > > > Andrew, how long will you remain in "wait-a-few-days-mode"? Given wha= t > > > Greg said below and that we already had three reports I know of I'd > > > prefer if we could fix this rather sooner than later in mainline -- > > > especially as Arch Linux and openSUSE Tumbleweed likely have switched= to > > > 6.4.y already or will do so soon. > > > > I'll send today's 2-patch series to Linus today or tomorrow. > > I need to make a correction to the patch fixing the issue (the first > one in the series) and will post it within an hour. Thanks! Corrected patch is posted at https://lore.kernel.org/all/20230705171213.2843068-2-surenb@google.com/. The other patch is unchanged but I posted v3 of the entire patchset anyway. Andrew, could you please replace the old version with this one before sending it to Linus? Thanks, Suren.