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Tue, 01 Sep 2026 01:22:02 -0700 (PDT) Date: Tue, 01 Sep 2026 01:22:02 -0700 In-Reply-To: <20260901014303.417027-1-junjie.cao@intel.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a968b2a.08473e0e.15b4ac.0000.GAE@google.com> Subject: Re: [syzbot] [mm?] INFO: rcu detected stall in exit_to_user_mode_loop From: syzbot To: akpm@linux-foundation.org, cgroups@vger.kernel.org, davem@davemloft.net, edumazet@google.com, hannes@cmpxchg.org, hdanton@sina.com, horms@kernel.org, jackmanb@google.com, jhs@mojatatu.com, jiri@resnulli.us, junjie.cao@intel.com, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@kernel.org, mhocko@suse.com, muchun.song@linux.dev, netdev@vger.kernel.org, pabeni@redhat.com, roman.gushchin@linux.dev, shakeel.butt@linux.dev, surenb@google.com, syzkaller-bugs@googlegroups.com, vbabka@suse.cz, vinicius.gomes@intel.com, ziy@nvidia.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam11 X-Rspam-User: X-Stat-Signature: co8tk7477z8w8xyxy1u4drdafk44d5w1 X-Rspamd-Queue-Id: E89791C0003 X-HE-Tag: 1788250922-318759 X-HE-Meta: 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 hUywW10c 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 Om3kvwhc hMBZykkI0lB7/KzvfWf1ILlCNR/H6MSl69SYO0vp/cn/jKTgDIoZL6U9jx9yZ6VHlgwVuaKDCkHauY2/Mya05S+70y8j2R5g6Q3+6knt/bsgvJhfPBHJfYwDEJ06HXH9mM4dnCuS2VjTxw1nKttjuqHdLyvu+criW5b68pqwGQZUDorSTAA1RbS4mRR8RLUS Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello, syzbot has tested the proposed patch and the reproducer did not trigger any issue: Reported-by: syzbot+2642f347f7309b4880dc@syzkaller.appspotmail.com Tested-by: syzbot+2642f347f7309b4880dc@syzkaller.appspotmail.com Tested on: commit: abdf623d Merge tag 'wq-for-7.3-rc1-fixes' of git://git.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=123d1379580000 kernel config: https://syzkaller.appspot.com/x/.config?x=9cc692b98d9b4fdb dashboard link: https://syzkaller.appspot.com/bug?extid=2642f347f7309b4880dc compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 patch: https://syzkaller.appspot.com/x/patch.diff?x=16f7eb79580000 Note: testing is done by a robot and is best-effort only.