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AJvYcCWonr1gXrk9beQcSUfhcjmcn8ElNGYfJYA7AwS5gVRASxzus6JTSJPxWfbs16X4euld9kVh3uqSlIKdxA==@vger.kernel.org X-Gm-Message-State: AOJu0YwP056MykDYgS1bRpvuMk4TLqETJM3FDUOW4fGimd0zstekHjoa c/Qt4Y9EVdaepUYqy0eOTjOvqYW7niY37iRdql0tBW+WpazrSV5k+2Bl2feod6grWt3RMeXijlt tEpcXfOmPJst/pholHnA0VBeUtONUMDw0dzYHkiyqtdP/QwYTeHvU78p+AeE= Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:f023:b0:65f:6628:94fc with SMTP id 006d021491bc7-6785bb6765amr2633117eaf.63.1771152567785; Sun, 15 Feb 2026 02:49:27 -0800 (PST) Date: Sun, 15 Feb 2026 02:49:27 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6991a4b7.a70a0220.2c38d7.00dd.GAE@google.com> Subject: [syzbot] [media?] KMSAN: uninit-value in vidtv_ts_null_write_into From: syzbot To: dwlsalmeida@gmail.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: cd7a5651db26 alpha: add missing address argument in call t.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=125b62aa580000 kernel config: https://syzkaller.appspot.com/x/.config?x=50148b563a4d5941 dashboard link: https://syzkaller.appspot.com/bug?extid=96f901260a0b2d29cd1a compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13e5a6e6580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=172c7e5a580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/23c623fcb1bf/disk-cd7a5651.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5128bb44f38d/vmlinux-cd7a5651.xz kernel image: https://storage.googleapis.com/syzbot-assets/a65d6b263e08/bzImage-cd7a5651.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+96f901260a0b2d29cd1a@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in vidtv_ts_null_write_into+0x43e/0x5c0 drivers/media/test-drivers/vidtv/vidtv_ts.c:62 vidtv_ts_null_write_into+0x43e/0x5c0 drivers/media/test-drivers/vidtv/vidtv_ts.c:62 vidtv_mux_pad_with_nulls drivers/media/test-drivers/vidtv/vidtv_mux.c:366 [inline] vidtv_mux_tick+0x34b7/0x3e40 drivers/media/test-drivers/vidtv/vidtv_mux.c:411 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0xae7/0x1d60 kernel/workqueue.c:3358 worker_thread+0xede/0x1580 kernel/workqueue.c:3439 kthread+0x53f/0x600 kernel/kthread.c:467 ret_from_fork+0x20f/0x910 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Uninit was stored to memory at: vidtv_ts_null_write_into+0x437/0x5c0 drivers/media/test-drivers/vidtv/vidtv_ts.c:64 vidtv_mux_pad_with_nulls drivers/media/test-drivers/vidtv/vidtv_mux.c:366 [inline] vidtv_mux_tick+0x34b7/0x3e40 drivers/media/test-drivers/vidtv/vidtv_mux.c:411 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0xae7/0x1d60 kernel/workqueue.c:3358 worker_thread+0xede/0x1580 kernel/workqueue.c:3439 kthread+0x53f/0x600 kernel/kthread.c:467 ret_from_fork+0x20f/0x910 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Local variable args.i134 created at: vidtv_mux_pad_with_nulls drivers/media/test-drivers/vidtv/vidtv_mux.c:351 [inline] vidtv_mux_tick+0x3150/0x3e40 drivers/media/test-drivers/vidtv/vidtv_mux.c:411 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0xae7/0x1d60 kernel/workqueue.c:3358 CPU: 1 UID: 0 PID: 30 Comm: kworker/1:1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: events vidtv_mux_tick ===================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup