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AJvYcCWnnKt8vcq0qFdISv++r6/ARIAfuI1GHrmb7JiOdyRXZ2EMiXdj0ukovue6QSmurDfjWHxyEJpc1bV0nw==@vger.kernel.org X-Gm-Message-State: AOJu0YwN+YoLjjNwGt2XxZAbwAWBwjCCCf8iK3xPpdievfFjWqbr7jwe qOJXI9DcUxRpUhJXmXkYBnbFroOIFKzywFO3MKB2oeC0YV0ojvfLFSJtYm+5uVYggIZ9gsVv7bA DIe3Ra45H5cC4g3kXPJjCstDx8qzqpO2gknXDlR8KTuL16ghCB+6s/zQ= X-Google-Smtp-Source: AGHT+IG3G67a6Sgd7/mRMdBUyMuLMc2OZnTB9uJeOwPl6HE/W8B/zWSxy68OaplcgyH36x24pIW2fzADSIRBT9rCHy8g+yNproe1 Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:3186:b0:3d4:3ef4:d4d9 with SMTP id e9e14a558f8ab-3d6e58722dfmr50493145ab.14.1743819445985; Fri, 04 Apr 2025 19:17:25 -0700 (PDT) Date: Fri, 04 Apr 2025 19:17:25 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67f092b5.050a0220.0a13.0229.GAE@google.com> Subject: [syzbot] [media?] KMSAN: uninit-value in cxusb_i2c_xfer From: syzbot To: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, mkrufky@linuxtv.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 4e82c87058f4 Merge tag 'rust-6.15' of git://git.kernel.org.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=166a7bcf980000 kernel config: https://syzkaller.appspot.com/x/.config?x=378acbc45ac948ee dashboard link: https://syzkaller.appspot.com/bug?extid=526bd95c0ec629993bf3 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=13488fb0580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1595dc74580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6045aa9da8ac/disk-4e82c870.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1adf8802c9fe/vmlinux-4e82c870.xz kernel image: https://storage.googleapis.com/syzbot-assets/9eb6c71670e3/bzImage-4e82c870.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+526bd95c0ec629993bf3@syzkaller.appspotmail.com dvb-usb: bulk message failed: -22 (3/0) ===================================================== BUG: KMSAN: uninit-value in cxusb_gpio_tuner drivers/media/usb/dvb-usb/cxusb.c:124 [inline] BUG: KMSAN: uninit-value in cxusb_i2c_xfer+0x153a/0x1a60 drivers/media/usb/dvb-usb/cxusb.c:196 cxusb_gpio_tuner drivers/media/usb/dvb-usb/cxusb.c:124 [inline] cxusb_i2c_xfer+0x153a/0x1a60 drivers/media/usb/dvb-usb/cxusb.c:196 __i2c_transfer+0xe25/0x3150 drivers/i2c/i2c-core-base.c:-1 i2c_transfer+0x317/0x4a0 drivers/i2c/i2c-core-base.c:2315 i2c_transfer_buffer_flags+0x125/0x1e0 drivers/i2c/i2c-core-base.c:2343 i2c_master_send include/linux/i2c.h:109 [inline] i2cdev_write+0x210/0x280 drivers/i2c/i2c-dev.c:183 do_loop_readv_writev fs/read_write.c:848 [inline] vfs_writev+0x963/0x14e0 fs/read_write.c:1057 do_writev+0x247/0x5c0 fs/read_write.c:1101 __do_sys_writev fs/read_write.c:1169 [inline] __se_sys_writev fs/read_write.c:1166 [inline] __x64_sys_writev+0x98/0xe0 fs/read_write.c:1166 x64_sys_call+0x2229/0x3c80 arch/x86/include/generated/asm/syscalls_64.h:21 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Local variable i.i809 created at: cxusb_gpio_tuner drivers/media/usb/dvb-usb/cxusb.c:116 [inline] cxusb_i2c_xfer+0x323/0x1a60 drivers/media/usb/dvb-usb/cxusb.c:196 __i2c_transfer+0xe25/0x3150 drivers/i2c/i2c-core-base.c:-1 CPU: 0 UID: 0 PID: 5806 Comm: syz-executor225 Not tainted 6.14.0-syzkaller-10892-g4e82c87058f4 #0 PREEMPT(undef) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 ===================================================== --- 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