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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 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 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