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AJvYcCU7QUv0I5j4CZMHewRlhuEyUe3ryzb6lDDUv9fexqF/VFWOAN8cHiIJh3gXfOY5RzRu5G0EZyRAuRjns50=@vger.kernel.org X-Gm-Message-State: AOJu0YyC9q6Hh2jhe/8wY+H42JFJgWt6FFrnp3JRyH0V5SL1uqFcvXyw qk/Y+6Wf8qHDJb6vu3zxy54jOuUSx43KHApPYinSZK0W6xcFeKfcBP/LGhAIq9etKv6N9ZL65tq mSIwIUSE5v7ZG+RJfX2YpUEWoxyMgTqgthiMrIno/IW9Ih78TAW+wCRQ= X-Google-Smtp-Source: AGHT+IES1c6ggIagGg+UIBXqrsUM9+WVC9F+mryIJZ0Jdo5NOMaY2S6vwhbvIKMxL3MgxpGJZclMcPVt0AQRKnED5528Ik1OJJp+ Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:148c:b0:39f:5e18:239d with SMTP id e9e14a558f8ab-3a375a9ac5emr92835985ab.15.1728306063968; Mon, 07 Oct 2024 06:01:03 -0700 (PDT) Date: Mon, 07 Oct 2024 06:01:03 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6703db8f.050a0220.49194.0508.GAE@google.com> Subject: Re: [syzbot] [bluetooth?] KMSAN: uninit-value in hci_rx_work From: syzbot To: eadavis@qq.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KMSAN: uninit-value in hci_rx_work ===================================================== BUG: KMSAN: uninit-value in hci_acldata_packet net/bluetooth/hci_core.c:3796 [inline] BUG: KMSAN: uninit-value in hci_rx_work+0x1092/0x11f0 net/bluetooth/hci_core.c:4030 hci_acldata_packet net/bluetooth/hci_core.c:3796 [inline] hci_rx_work+0x1092/0x11f0 net/bluetooth/hci_core.c:4030 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3310 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3391 kthread+0x3e2/0x540 kernel/kthread.c:389 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Uninit was created at: slab_post_alloc_hook mm/slub.c:4091 [inline] slab_alloc_node mm/slub.c:4134 [inline] kmem_cache_alloc_node_noprof+0x6bf/0xb80 mm/slub.c:4186 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:587 __alloc_skb+0x363/0x7b0 net/core/skbuff.c:678 alloc_skb include/linux/skbuff.h:1322 [inline] bt_skb_alloc include/net/bluetooth/bluetooth.h:493 [inline] vhci_get_user drivers/bluetooth/hci_vhci.c:487 [inline] vhci_write+0x122/0x960 drivers/bluetooth/hci_vhci.c:608 new_sync_write fs/read_write.c:590 [inline] vfs_write+0xb28/0x1540 fs/read_write.c:683 ksys_write+0x24f/0x4c0 fs/read_write.c:736 __do_sys_write fs/read_write.c:748 [inline] __se_sys_write fs/read_write.c:745 [inline] __x64_sys_write+0x93/0xe0 fs/read_write.c:745 x64_sys_call+0x306a/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 0 UID: 0 PID: 4561 Comm: kworker/u9:1 Tainted: G W 6.12.0-rc2-syzkaller-g8cf0b93919e1-dirty #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: hci0 hci_rx_work ===================================================== Tested on: commit: 8cf0b939 Linux 6.12-rc2 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=121adb80580000 kernel config: https://syzkaller.appspot.com/x/.config?x=981fe2ff8a1e457a dashboard link: https://syzkaller.appspot.com/bug?extid=6ea290ba76d8c1eb1ac2 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=150fc707980000