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Wed, 05 Jul 2023 09:14:11 -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: <20230705084906.22eee41e6e72da588fce5a48@linux-foundation.org> From: Suren Baghdasaryan Date: Wed, 5 Jul 2023 09:14:00 -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: 319CA140014 X-Rspam-User: X-Rspamd-Server: rspam02 X-Stat-Signature: h16muufb94oj8dhf8dj55a7aeqkckked X-HE-Tag: 1688573651-467712 X-HE-Meta: U2FsdGVkX18o32KalWTkQB1sv4x206lWa1x2+zmty7WEon/00vsGbb72v6ydDvleAgIEUftWsJJcQq3bZwqlWQIGLsR3XaqntkWIKFqA0oj49BkZmpPXmvIrfM0lB0/pFc3M4OV1U3+WTY+wfFLexdBgV5ybWkb9Kl+ji37xwa7NMSG0ifr6AAo4NKHV7tY8JIweLz9712KrMZHPiDamImfwXVR6AsTrxqO1k/t8j/5tE0ZlIEbpu4AQb2DkdmeAqG4MFQh+hbxHog6rH73FzJf/yy2tRTMRCxz1FF0PCeJfUIxOfFdZH8SICzEPYqQD7a3Ld3pfXx4xrMDsjmxt6bRFEHUgWHxnk0jaSZVA3zUCSM9Lnr0cRtWof8wgi+t1DUN4nspGZbK/Aqi48U4UV5Ye/C97AeQ24pcgI6Thb+r99LtlNCP4VwAwKAv8HUeg6rfSU8dQwOG2GGUvgH3OmTdA6Jc71Vytl9R3A2yZOIvZ9+5zHNEbUkr+YIFHtGDYeK82+1fbTsuoyDOxVENT6qpS6igWEFGkkuZVMdfznrp224Wt3wWqDqH3G21it3rfag9hJx5xcoG1I3FH0nZLJ2wWlsf2NF8dC6zjdWxfGDBEdq689sK4m3y1ENPtM5VNRy43GxPxDRdcMJxd6AbE413xjCO07Hb/4iNDWnqLZPda0m7rut+YBlOYjUn75ABMr0HVBA0ZhOlhinQp1vGuqsTCRBC3rapzj3CLepK5WFQqD2V6d0FLAt/PS38CTDA+tpwCkK3zWd/Z5ljvqo8UY9nnjSv8RIF6mUu1VRXij9v9TcYTBgcssss8f/rL91PzdoB7dvMQljPpE80AUpgOPrDKEAomt4rQkQCR1WmqrL21RJUFNu0yKHMIuGcR0WaOCNsD5ym4ZArSOX8gPclLfcYKidbvMH05FMc/kcScSdowJsReZgwXvZvRXgLD3+SOQvrpFQSrpVFuJxhRrUJ bQKZm/y8 OGBGFQrqdxE++fq38hbwPdVCQS0BNfoWrOx8Rvv/4OmvAoLDq6aVnYodD3U01c19Q94RRKaZ1zHrrlea4YqdGxGIhTvyaMG+4p2mBNpjj1k6OG6qDBpLuQXsV3olWbrPiPGijecswvPZI0fi4Z2gwB2AxsYnuNzeC4cMjQkVAR0OPbkfip7LkA91xW+FnjTFAC/UzyNrV4CH9WdtLLK7QOZrLLNf5eiYTOMW6sKkbECECYb6dj9j03rmR9W0zr7glq8VxA0u7nObFMSL2v4HeR52CfeUpntnTfJU4eNHHhAUBRjEoWeq6q9MkgAucjM4I7Z+Lmmxn8+bun2FNPvOwVQDrGBuLs0R8SgNakhyTMlH3PCxFvp6rh6ep03EiWWzQ+Y5O7qyZQMr74e2oFC4UdlRybaYUE56Q9IP7 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 8:49=E2=80=AFAM Andrew Morton wrote: > > On Wed, 5 Jul 2023 10:51:57 +0200 "Linux regression tracking (Thorsten Le= emhuis)" wrote: > > > >>> I'm in wait-a-few-days-mode on this. To see if we have a backporta= ble > > >>> fix rather than disabling the feature in -stable. > > > > Andrew, how long will you remain in "wait-a-few-days-mode"? Given what > > 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 t= o > > 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!