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AJvYcCXmKylmw9CWr4ijAtAh8Wx6LwvlRNTKnEzsPBH5vH2avL12zaly7czFeGQc3r6Lm1i8bLQPpkUI5HmTVNZ9EYfKeuQePaOc X-Gm-Message-State: AOJu0YwjpmVRbvmvtd9HI1lMblj3QpNPMzeWdZzjQvuCGuD+Yi02vUt7 cNstPe7dZyMd0wS2/vW94/ZEbxlzvjwKsiZU478ukqlbaS+t5i4lpdZ5c6ug1ozGhmmdRJnwzy5 WwajjQZJw8kX5XJRR2iMoy1l6adSFtcp0G2brQyYRLKh0EVqOlkSjBCw= X-Google-Smtp-Source: AGHT+IHQRAaAzXWtAlHHXRq3FoQG0Pu2gvokhMpmLxgURuAWvd1ROW62KNKw88NbXloTj/U16U80J53/2ZZuXL510i8T6Lb2u6bw Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:348c:b0:474:e855:df7a with SMTP id t12-20020a056638348c00b00474e855df7amr54497jal.5.1709462896666; Sun, 03 Mar 2024 02:48:16 -0800 (PST) Date: Sun, 03 Mar 2024 02:48:16 -0800 In-Reply-To: <000000000000903473060e875e9e@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000b69bf20612bf586e@google.com> Subject: Re: [syzbot] [hams?] KMSAN: uninit-value in nr_route_frame From: syzbot To: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, linux-hams@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, ralf@linux-mips.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 04b8076df253 Merge tag 'firewire-fixes-6.8-rc7' of git://g.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=15ccc1a2180000 kernel config: https://syzkaller.appspot.com/x/.config?x=80c7a82a572c0de3 dashboard link: https://syzkaller.appspot.com/bug?extid=f770ce3566e60e5573ac 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=12918b32180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16b3efac180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/a4610b1ff2a7/disk-04b8076d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/991e9d902d39/vmlinux-04b8076d.xz kernel image: https://storage.googleapis.com/syzbot-assets/a5b8e8e98121/bzImage-04b8076d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f770ce3566e60e5573ac@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in nr_route_frame+0x4a9/0xfc0 net/netrom/nr_route.c:787 nr_route_frame+0x4a9/0xfc0 net/netrom/nr_route.c:787 nr_xmit+0x5a/0x1c0 net/netrom/nr_dev.c:144 __netdev_start_xmit include/linux/netdevice.h:4980 [inline] netdev_start_xmit include/linux/netdevice.h:4994 [inline] xmit_one net/core/dev.c:3547 [inline] dev_hard_start_xmit+0x244/0xa10 net/core/dev.c:3563 __dev_queue_xmit+0x33ed/0x51c0 net/core/dev.c:4351 dev_queue_xmit include/linux/netdevice.h:3171 [inline] raw_sendmsg+0x64e/0xc10 net/ieee802154/socket.c:299 ieee802154_sock_sendmsg+0x91/0xc0 net/ieee802154/socket.c:96 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638 __sys_sendmsg net/socket.c:2667 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x307/0x490 net/socket.c:2674 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Uninit was created at: slab_post_alloc_hook mm/slub.c:3819 [inline] slab_alloc_node mm/slub.c:3860 [inline] kmem_cache_alloc_node+0x5cb/0xbc0 mm/slub.c:3903 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:560 __alloc_skb+0x352/0x790 net/core/skbuff.c:651 alloc_skb include/linux/skbuff.h:1296 [inline] alloc_skb_with_frags+0xc8/0xbd0 net/core/skbuff.c:6394 sock_alloc_send_pskb+0xa80/0xbf0 net/core/sock.c:2783 sock_alloc_send_skb include/net/sock.h:1855 [inline] raw_sendmsg+0x367/0xc10 net/ieee802154/socket.c:282 ieee802154_sock_sendmsg+0x91/0xc0 net/ieee802154/socket.c:96 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638 __sys_sendmsg net/socket.c:2667 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x307/0x490 net/socket.c:2674 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b CPU: 0 PID: 5044 Comm: syz-executor263 Not tainted 6.8.0-rc6-syzkaller-00250-g04b8076df253 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 ===================================================== --- 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.