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Wed, 18 Jun 2025 15:49:41 -0700 (PDT) Message-ID: <32a733e9-935b-44bc-b507-f06b62ce5ce8@kernel.dk> Date: Wed, 18 Jun 2025 16:49:39 -0600 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [syzbot] [mm?] WARNING in __put_task_struct (5) To: Andrew Morton , syzbot Cc: Liam.Howlett@oracle.com, bsegall@google.com, david@redhat.com, dietmar.eggemann@arm.com, juri.lelli@redhat.com, kees@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, mgorman@suse.de, mhocko@suse.com, mingo@redhat.com, peterz@infradead.org, rostedt@goodmis.org, rppt@kernel.org, surenb@google.com, syzkaller-bugs@googlegroups.com, vbabka@suse.cz, vincent.guittot@linaro.org, vschneid@redhat.com References: <6852b77e.a70a0220.79d0a.0216.GAE@google.com> <20250618153137.a8f3937e86816cd9b7a3ab0d@linux-foundation.org> Content-Language: en-US From: Jens Axboe In-Reply-To: <20250618153137.a8f3937e86816cd9b7a3ab0d@linux-foundation.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: C3066120002 X-Stat-Signature: q3yce9xq4c5s4txjn9pa7t6es14wmd9j X-Rspam-User: X-HE-Tag: 1750286982-419035 X-HE-Meta: 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 XGyQOPdI 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 eC6LbJLI 7OOZQZfrzjNv7Xd+XBMAk3BA7cy0WmcgyWx5fSVqnQK+VAn+HGTyJnzWo8j43jaYAeRsBW09P6E= 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: List-Subscribe: List-Unsubscribe: On 6/18/25 4:31 PM, Andrew Morton wrote: > On Wed, 18 Jun 2025 05:56:30 -0700 syzbot wrote: > >> Hello, >> >> syzbot found the following issue on: >> >> HEAD commit: 4663747812d1 Merge tag 'platform-drivers-x86-v6.16-2' of g.. >> git tree: upstream >> console output: https://syzkaller.appspot.com/x/log.txt?x=1626f90c580000 >> kernel config: https://syzkaller.appspot.com/x/.config?x=d6f01a06a8393850 >> dashboard link: https://syzkaller.appspot.com/bug?extid=ca15a081ac6b8357d82c >> compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 >> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10c9d5d4580000 >> >> Downloadable assets: >> disk image: https://storage.googleapis.com/syzbot-assets/ef27ce1c74bb/disk-46637478.raw.xz >> vmlinux: https://storage.googleapis.com/syzbot-assets/2962783b1956/vmlinux-46637478.xz >> kernel image: https://storage.googleapis.com/syzbot-assets/faa841f27097/bzImage-46637478.xz >> >> IMPORTANT: if you fix the issue, please add the following tag to the commit: >> Reported-by: syzbot+ca15a081ac6b8357d82c@syzkaller.appspotmail.com >> >> RBP: 00007ff5f3810b39 R08: 0000000000000000 R09: 0000000000000000 >> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 >> R13: 0000000000000000 R14: 00007ff5f39b5fa0 R15: 00007ffd192cb478 >> >> ------------[ cut here ]------------ >> WARNING: CPU: 1 PID: 6071 at kernel/fork.c:731 __put_task_struct+0x340/0x530 kernel/fork.c:731 > > It doesn't look MM related. Perhaps there's something wonky in the > io_sq_offload_create() error path. Yeah it's a bug added in this release, already fixed and going upstream later this week. #syz dup: [syzbot] [io-uring?] WARNING: ODEBUG bug in io_sq_offload_create -- Jens Axboe