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[35.233.145.57]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-adec4756d0csm5861792a12.55.2025.02.19.10.35.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Feb 2025 10:35:43 -0800 (PST) Date: Wed, 19 Feb 2025 18:35:37 +0000 From: Carlos Llamas To: syzbot , surenb@google.com Cc: arve@android.com, brauner@kernel.org, gregkh@linuxfoundation.org, joel@joelfernandes.org, linux-kernel@vger.kernel.org, maco@android.com, surenb@google.com, syzkaller-bugs@googlegroups.com, tkjos@android.com Subject: Re: [syzbot] [kernel?] possible deadlock in binder_alloc_free_page Message-ID: References: <6782483e.050a0220.216c54.001d.GAE@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6782483e.050a0220.216c54.001d.GAE@google.com> On Sat, Jan 11, 2025 at 02:30:22AM -0800, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 7b4b9bf203da Add linux-next specific files for 20250107 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=17d02dc4580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=63fa2c9d5e12faef > dashboard link: https://syzkaller.appspot.com/bug?extid=799a2d4576c454ac2693 > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10302dc4580000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/c179cc0c7a3c/disk-7b4b9bf2.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/fdea80f2ec16/vmlinux-7b4b9bf2.xz > kernel image: https://storage.googleapis.com/syzbot-assets/a277fcaff608/bzImage-7b4b9bf2.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+799a2d4576c454ac2693@syzkaller.appspotmail.com Hey Suren, just FYI. I bisected this to commit e8f32ff00a66 ("mm: replace vm_lock and detached flag with a reference count"), which was an older version (v7) of your patchset. However, I've tested the same on the newer linux-next tip with your v10 and it no longer reproduces the problem. Nothing else for me to do here. Regards, Carlos Llamas