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charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 4f5e5092fdbf Merge tag 'net-6.8-rc5' of git://git.kernel.o.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=129f6398180000 kernel config: https://syzkaller.appspot.com/x/.config?x=1d7c92dd8d5c7a1e dashboard link: https://syzkaller.appspot.com/bug?extid=5b3e7c7a0b77f0c03b0d 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=14fc9c8a180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17d0cc1c180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/d430539932db/disk-4f5e5092.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6369586e33b7/vmlinux-4f5e5092.xz kernel image: https://storage.googleapis.com/syzbot-assets/9c1e38f80254/bzImage-4f5e5092.xz The issue was bisected to: commit 3f83d8a77eeeb47011b990fd766a421ee64f1d73 Author: Paolo Abeni Date: Thu Feb 8 18:03:51 2024 +0000 mptcp: fix more tx path fields initialization bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=160a83a4180000 final oops: https://syzkaller.appspot.com/x/report.txt?x=150a83a4180000 console output: https://syzkaller.appspot.com/x/log.txt?x=110a83a4180000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5b3e7c7a0b77f0c03b0d@syzkaller.appspotmail.com Fixes: 3f83d8a77eee ("mptcp: fix more tx path fields initialization") ------------[ cut here ]------------ WARNING: CPU: 1 PID: 27 at net/mptcp/protocol.c:1001 __mptcp_clean_una+0xb89/0xd70 net/mptcp/protocol.c:1001 Modules linked in: CPU: 1 PID: 27 Comm: kworker/1:1 Not tainted 6.8.0-rc4-syzkaller-00180-g4f5e5092fdbf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Workqueue: events mptcp_worker RIP: 0010:__mptcp_clean_una+0xb89/0xd70 net/mptcp/protocol.c:1001 Code: 8d 0d a5 f6 e9 7d fc ff ff 44 89 f1 80 e1 07 38 c1 0f 8c 87 fc ff ff 4c 89 f7 e8 72 0d a5 f6 e9 7a fc ff ff e8 98 f0 42 f6 90 <0f> 0b 90 49 bc 00 00 00 00 00 fc ff df e9 29 f7 ff ff 44 89 f1 80 RSP: 0018:ffffc90000a2f860 EFLAGS: 00010293 RAX: ffffffff8b507ba8 RBX: ffff888024ee3ab8 RCX: ffff8880192e9dc0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000a2f950 R08: ffffffff8b507228 R09: fffff52000145f24 R10: dffffc0000000000 R11: fffff52000145f24 R12: dffffc0000000000 R13: 1ffff11004a6e000 R14: 0000000000000000 R15: ffff888025370000 FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8a82c561d0 CR3: 000000007d8b6000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __mptcp_clean_una_wakeup+0x7f/0x340 net/mptcp/protocol.c:1049 mptcp_clean_una_wakeup net/mptcp/protocol.c:1056 [inline] __mptcp_retrans+0xbf/0xb20 net/mptcp/protocol.c:2587 mptcp_worker+0xd13/0x1610 net/mptcp/protocol.c:2739 process_one_work kernel/workqueue.c:2633 [inline] process_scheduled_works+0x913/0x1420 kernel/workqueue.c:2706 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787 kthread+0x2ef/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242 --- 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection 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