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AKwUvBwTv4DD/4AaQIucZ+loh0D8jX5t8wSYogs8i1uBDoXL0a15p/MH7JA1pMCGtfkeTF1cBibOjJ4=@vger.kernel.org X-Gm-Message-State: AFuF++lE0pK7+1SI238ZKK6ADZbcPYbPt4uDywmD9P6C6CjzeM6aN/n0 k28yPlwMapY/2cdwq0p8qmd9h4CiMn/W24E2g6TFDht+jJjZJgaokiNfWstWaZ3fNPDdUt0x/Do spfRo6SUHSPteRm39ZO6NZVccz5dk1JfqVx2o/toFQ7OJSoJx+w7DF9nCk5I= Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:168b:b0:6d2:9ab6:471c with SMTP id 006d021491bc7-6d29ab64a21mr248105eaf.84.1790089064861; Tue, 22 Sep 2026 07:57:44 -0700 (PDT) Date: Tue, 22 Sep 2026 07:57:44 -0700 In-Reply-To: <6a73d174.5aeeccc9.207e63.000c.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ab29768.514bccd6.255447.001e.GAE@google.com> Subject: Re: [syzbot] [net?] [afs?] kernel BUG in rxrpc_destroy_all_connections (2) From: syzbot To: davem@davemloft.net, dhowells@redhat.com, edumazet@google.com, horms@kernel.org, kuba@kernel.org, linux-afs@lists.infradead.org, linux-kernel@vger.kernel.org, marc.dionne@auristor.com, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: f0100363d8c3 Merge tag 'xfs-fixes-7.3-rc5' of gitolite.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17660c5e580000 kernel config: https://syzkaller.appspot.com/x/.config?x=7d012d9c67977ee4 dashboard link: https://syzkaller.appspot.com/bug?extid=89001660f14fb7684c83 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11ecb805580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16e6f525580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-f0100363.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/57240753f5ee/vmlinux-f0100363.xz kernel image: https://storage.googleapis.com/syzbot-assets/2930b9a97546/bzImage-f0100363.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+89001660f14fb7684c83@syzkaller.appspotmail.com netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 bridge_slave_1: left allmulticast mode bridge_slave_1: left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state bridge_slave_0: left allmulticast mode bridge_slave_0: left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state bond0 (unregistering): (slave bond_slave_0): Releasing backup interface bond0 (unregistering): (slave bond_slave_1): Releasing backup interface bond0 (unregistering): Released all slaves rxrpc: Assertion failed ------------[ cut here ]------------ kernel BUG at net/rxrpc/conn_object.c:488! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 2 UID: 0 PID: 5766 Comm: kworker/u32:3 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: netns cleanup_net RIP: 0010:rxrpc_destroy_all_connections.cold+0x12/0x14 net/rxrpc/conn_object.c:488 Code: ff 90 0f 0b e8 39 99 99 00 48 c7 c7 60 6a 5d 8d e8 3d c0 af ff 90 0f 0b e8 25 99 99 00 48 c7 c7 60 6a 5d 8d e8 29 c0 af ff 90 <0f> 0b e8 11 99 99 00 49 63 d6 48 83 ce ff 48 c7 c7 40 f3 00 91 e8 RSP: 0018:ffffc90003f27970 EFLAGS: 00010286 RAX: 0000000000000017 RBX: ffff8880394c0000 RCX: 0000000000000000 RDX: 0000000000000017 RSI: ffffffff81ea1579 RDI: fffff520007e4f1f RBP: ffff8880394c0064 R08: 0000000000000007 R09: 0000000000000000 R10: 8000000000000000 R11: 0000000000000001 R12: 1ffff920007e4f30 R13: ffff8880394c0078 R14: ffff8880394c0088 R15: ffff8880394c0088 FS: 0000000000000000(0000) GS:ffff8880d5d53000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055a4b15ca000 CR3: 000000003c5bd000 CR4: 0000000000352ef0 Call Trace: rxrpc_exit_net+0x7b/0xc0 net/rxrpc/net_ns.c:113 ops_exit_list net/core/net_namespace.c:200 [inline] ops_undo_list+0x2ee/0xab0 net/core/net_namespace.c:253 cleanup_net+0x499/0x920 net/core/net_namespace.c:706 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396 process_scheduled_works kernel/workqueue.c:3479 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560 kthread+0x373/0x450 kernel/kthread.c:436 ret_from_fork+0x730/0xd60 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:rxrpc_destroy_all_connections.cold+0x12/0x14 net/rxrpc/conn_object.c:488 Code: ff 90 0f 0b e8 39 99 99 00 48 c7 c7 60 6a 5d 8d e8 3d c0 af ff 90 0f 0b e8 25 99 99 00 48 c7 c7 60 6a 5d 8d e8 29 c0 af ff 90 <0f> 0b e8 11 99 99 00 49 63 d6 48 83 ce ff 48 c7 c7 40 f3 00 91 e8 RSP: 0018:ffffc90003f27970 EFLAGS: 00010286 RAX: 0000000000000017 RBX: ffff8880394c0000 RCX: 0000000000000000 RDX: 0000000000000017 RSI: ffffffff81ea1579 RDI: fffff520007e4f1f RBP: ffff8880394c0064 R08: 0000000000000007 R09: 0000000000000000 R10: 8000000000000000 R11: 0000000000000001 R12: 1ffff920007e4f30 R13: ffff8880394c0078 R14: ffff8880394c0088 R15: ffff8880394c0088 FS: 0000000000000000(0000) GS:ffff8880d5d53000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055a4b15ca000 CR3: 000000003c5bd000 CR4: 0000000000352ef0 --- 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.