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AJvYcCV6xcp0ghdJSck5GD1cy5sNsJ1ZFSPSitL/6qkZeHrYacV7i61gj94/Dhi9cJbjwKbagNjI8ps7lgOUqM8=@vger.kernel.org X-Gm-Message-State: AOJu0YwMRWgfMYoQrXdYbDUB5qhbXT/yab7JxdOdyDX69QxMYgAuBLmc pJVkwx5tC4yoa5SLRenXxMLc8k1wEXRLMDQWPrZ5ZeFUgp8U3/++Ph/rA9vHrMi4LMDmQcOM6R8 MVklhd+xNBiZe+onnQnzNMajVpG8LgLlFM25gjKnm5TbsZv76CoR+7Kw= X-Google-Smtp-Source: AGHT+IElUx/7bX1NMhK2xXsWLcc5/IpMF+7jwmn5Z/oAZyqaUzvv5ROJ5ZbDCXqCtqs6HwP2gWaYv0857HliFAzIWtpCqPdfIF6Q Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:13a6:b0:3a0:a385:911d with SMTP id e9e14a558f8ab-3a3757d92e5mr115478535ab.0.1728361742188; Mon, 07 Oct 2024 21:29:02 -0700 (PDT) Date: Mon, 07 Oct 2024 21:29:02 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6704b50e.050a0220.49194.0522.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+0xff7/0x1150 net/bluetooth/hci_core.c:4030 hci_acldata_packet net/bluetooth/hci_core.c:3796 [inline] hci_rx_work+0xff7/0x1150 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+0x127/0x900 drivers/bluetooth/hci_vhci.c:607 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: 4556 Comm: kworker/u9:1 Not tainted 6.12.0-rc2-syzkaller-g87d6aab2389e-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: hci0 hci_rx_work ===================================================== Tested on: commit: 87d6aab2 Merge tag 'for_linus' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1602bb80580000 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=12890f9f980000