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AJvYcCV8u2eVDiMic6sndvtFbM9vI4Jg6flSkAWaphc8J7Ean364UzKx0Bw4td4dVJDhFJp1QjgXHCI=@vger.kernel.org X-Gm-Message-State: AOJu0YwUQuqLLhgKfFZh7NG00B6foBa/Nta+s+PWdO4k6eDFH9xLUHZJ TGw09CVBllTt5zhsOrhzw1BreV4v5onk8e2MyjNXCu8IdS0EisIWByQkrGRBijRHUMIDooGvQMC P+syk9SzZOzo3ZWDP3WuRyMt+Xt4jr7ukFcHrwh7RgR6njHsFpdlOyC63c+4= Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:1b05:b0:672:f683:7c54 with SMTP id 006d021491bc7-67bdaa924a6mr3110120eaf.69.1773431543561; Fri, 13 Mar 2026 12:52:23 -0700 (PDT) Date: Fri, 13 Mar 2026 12:52:23 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69b46af7.050a0220.36eb34.000e.GAE@google.com> Subject: [syzbot] [net?] general protection fault in bond_header_create From: syzbot To: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, jv@jvosburgh.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 8004279c41ad Merge tag 'nfs-for-7.0-2' of git://git.linux-.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1593c416580000 kernel config: https://syzkaller.appspot.com/x/.config?x=ccef46afa67b2b19 dashboard link: https://syzkaller.appspot.com/bug?extid=3d8bc31c45e11450f24c 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=172d1416580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-8004279c.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f56a78af5be3/vmlinux-8004279c.xz kernel image: https://storage.googleapis.com/syzbot-assets/89a6ba48229d/bzImage-8004279c.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3d8bc31c45e11450f24c@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xe000080fee63d21a: 0000 [#1] SMP KASAN NOPTI KASAN: probably user-memory-access in range [0x0000607f731e90d0-0x0000607f731e90d7] CPU: 0 UID: 0 PID: 54 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: mld mld_ifc_work RIP: 0010:bond_header_create+0x150/0x300 drivers/net/bonding/bond_main.c:1524 Code: e8 25 bd 59 fb 45 85 f6 0f 84 a5 00 00 00 e8 d7 b8 59 fb eb 05 e8 d0 b8 59 fb 48 85 ed 0f 84 89 00 00 00 48 89 e8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 ef e8 71 81 c5 fb 48 8b 6d 00 4c 8d 75 RSP: 0018:ffffc90000b0f600 EFLAGS: 00010202 RAX: 00000c0fee63d21a RBX: ffffffff866bf37b RCX: ffff888000c524c0 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000607f731e90d0 R08: ffffffff866bf37b R09: ffffffff8e75e420 R10: dffffc0000000000 R11: ffffffff866bf340 R12: 00000000000086dd R13: ffff8880127763c0 R14: 0000000000000001 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88808ca55000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2fbfe3ff8c CR3: 0000000012645000 CR4: 0000000000352ef0 Call Trace: dev_hard_header include/linux/netdevice.h:3439 [inline] neigh_connected_output+0x286/0x460 net/core/neighbour.c:1644 __ip6_finish_output net/ipv6/ip6_output.c:-1 [inline] ip6_finish_output+0x2e5/0x740 net/ipv6/ip6_output.c:219 NF_HOOK_COND include/linux/netfilter.h:307 [inline] ip6_output+0x340/0x550 net/ipv6/ip6_output.c:246 dst_output include/net/dst.h:470 [inline] NF_HOOK+0x177/0x4f0 include/linux/netfilter.h:318 mld_sendpack+0x8b4/0xe40 net/ipv6/mcast.c:1855 mld_send_cr net/ipv6/mcast.c:2154 [inline] mld_ifc_work+0x835/0xe70 net/ipv6/mcast.c:2693 process_one_work kernel/workqueue.c:3275 [inline] process_scheduled_works+0xb02/0x1830 kernel/workqueue.c:3358 worker_thread+0xa50/0xfc0 kernel/workqueue.c:3439 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:bond_header_create+0x150/0x300 drivers/net/bonding/bond_main.c:1524 Code: e8 25 bd 59 fb 45 85 f6 0f 84 a5 00 00 00 e8 d7 b8 59 fb eb 05 e8 d0 b8 59 fb 48 85 ed 0f 84 89 00 00 00 48 89 e8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 ef e8 71 81 c5 fb 48 8b 6d 00 4c 8d 75 RSP: 0018:ffffc90000b0f600 EFLAGS: 00010202 RAX: 00000c0fee63d21a RBX: ffffffff866bf37b RCX: ffff888000c524c0 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000607f731e90d0 R08: ffffffff866bf37b R09: ffffffff8e75e420 R10: dffffc0000000000 R11: ffffffff866bf340 R12: 00000000000086dd R13: ffff8880127763c0 R14: 0000000000000001 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff88808ca55000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055e232d92000 CR3: 000000000e54c000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: e8 25 bd 59 fb call 0xfb59bd2a 5: 45 85 f6 test %r14d,%r14d 8: 0f 84 a5 00 00 00 je 0xb3 e: e8 d7 b8 59 fb call 0xfb59b8ea 13: eb 05 jmp 0x1a 15: e8 d0 b8 59 fb call 0xfb59b8ea 1a: 48 85 ed test %rbp,%rbp 1d: 0f 84 89 00 00 00 je 0xac 23: 48 89 e8 mov %rbp,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 ef mov %rbp,%rdi 34: e8 71 81 c5 fb call 0xfbc581aa 39: 48 8b 6d 00 mov 0x0(%rbp),%rbp 3d: 4c rex.WR 3e: 8d .byte 0x8d 3f: 75 .byte 0x75 --- 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