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Wed, 05 Feb 2025 07:14:40 -0800 (PST) MIME-Version: 1.0 References: <67a34e60.050a0220.50516.0040.GAE@google.com> <9fc6212e-0f1e-435f-b7e5-72058f7fd6db@lucifer.local> In-Reply-To: <9fc6212e-0f1e-435f-b7e5-72058f7fd6db@lucifer.local> From: Jann Horn Date: Wed, 5 Feb 2025 16:14:03 +0100 X-Gm-Features: AWEUYZldxeCbX_2Dy0eF8s-3URd_Gl5OD0fUnrqVhNYFKmDuQAtk5qP25TCS9eg Message-ID: Subject: Re: [syzbot] [mm?] KCSAN: data-race in mprotect_fixup / try_to_migrate_one To: Lorenzo Stoakes , syzkaller Cc: syzbot , Liam.Howlett@oracle.com, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com, vbabka@suse.cz Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: C00B380013 X-Rspam-User: X-Rspamd-Server: rspam11 X-Stat-Signature: x9bn485bmemprh4uddu18jhdmr5yehs8 X-HE-Tag: 1738768482-46673 X-HE-Meta: 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 lrLfc5BW zyRiwcerThhmC8PzNWx0M6p9ZSI2iKw9yAbJRuilLaG7t0FpKhor9GxHjKISnfApO3YvcvE06cFCVUB9jxNtngNjxvRPKtJi/hobtNC0V6sAk53TfuR9uM82cMCfEUSuLgujBhxP/IjlJAs1tFvr7RnIdrYP4ZdK7+09jJ6oXCRurC0qKy6A42ZZtRgCt3g77yP3LRSrVglFg44ILYImYrsmfzrQcj3sVu1VD+qMSnt/QBvacmGU01rrBJD74TvLYdJVchVLNU9Fe727GBu81mSn141p/F2rSo1Gxg1T0oZ+JtVkM4BBYadY0/JvpHaIBsgPTQVqpG4sETDoZiBTHL6q/dNn3hpSKkTCsMo3KwqnFjSz4Fxef+SjPdI2DYENiT3+LZEXqb/1bJ4/bzLp7mO6sUBNvkCplypxFo4EGbYG5bICB0a9LaCIgfwNgQBBej/Tc1P0+SbohwOsn+gqeX8JjLcHa9v2AIql6B+ZuTO8J9jA= X-Bogosity: Unsure, tests=bogofilter, spamicity=0.499928, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, Feb 5, 2025 at 4:07=E2=80=AFPM Lorenzo Stoakes wrote: > On Wed, Feb 05, 2025 at 03:41:20AM -0800, syzbot wrote: > > read to 0xffff888114b41700 of 8 bytes by task 6418 on cpu 0: > > try_to_migrate_one+0xb5a/0x12e0 mm/rmap.c:2321 > > Be super nice if these reports could show the line of code! > > It's: > > if (vma->vm_flags & VM_LOCKED) fwiw if you follow the "dashboard link" in the bug report, you'll get a version of this where the source locations are clickable links to git.kernel.org at the right commit. Also note the "syzbot engineers can be reached at syzkaller@googlegroups.com" at the bottom of the message.