Hello, syzbot found the following issue on: HEAD commit: 03b123debcbc tcp: tcp_enter_quickack_mode() should be static git tree: net-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=168e1baaa80000 kernel config: https://syzkaller.appspot.com/x/.config?x=32e3dcc11fd0d297 dashboard link: https://syzkaller.appspot.com/bug?extid=bdcf141f362ef83335cf compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10bf2bf4a80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12741e9aa80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/348462fb61fa/disk-03b123de.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/33375730f77f/vmlinux-03b123de.xz kernel image: https://storage.googleapis.com/syzbot-assets/b6882fbac041/bzImage-03b123de.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+bdcf141f362ef83335cf@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ ODEBUG: activate active (active state 1) object: ffff88807f28f000 object type: rcu_head hint: 0x0 WARNING: CPU: 0 PID: 5029 at lib/debugobjects.c:514 debug_print_object+0x19e/0x2a0 lib/debugobjects.c:514 Modules linked in: CPU: 0 PID: 5029 Comm: syz-executor389 Not tainted 6.5.0-rc1-syzkaller-00458-g03b123debcbc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 RIP: 0010:debug_print_object+0x19e/0x2a0 lib/debugobjects.c:514 Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 49 48 8b 14 dd c0 20 c8 8a 41 56 4c 89 e6 48 c7 c7 20 14 c8 8a e8 b2 fa 28 fd <0f> 0b 58 83 05 5c 8b 87 0a 01 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e RSP: 0018:ffffc90003a5f168 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 RDX: ffff8880269b1dc0 RSI: ffffffff814d4986 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffffffff8ac81a80 R13: ffffffff8a6df720 R14: 0000000000000000 R15: ffff888017f63360 FS: 0000555555f7f380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000007b9d8000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> debug_object_activate+0x32b/0x490 lib/debugobjects.c:733 debug_rcu_head_queue kernel/rcu/rcu.h:226 [inline] kvfree_call_rcu+0x30/0xbe0 kernel/rcu/tree.c:3359 tcx_entry_free include/net/tcx.h:96 [inline] ingress_destroy+0x39f/0x520 net/sched/sch_ingress.c:127 __qdisc_destroy+0xc4/0x450 net/sched/sch_generic.c:1063 qdisc_destroy+0x4f/0x60 net/sched/sch_generic.c:1078 qdisc_graft+0x6f9/0x1680 net/sched/sch_api.c:1132 tc_modify_qdisc+0xcd2/0x1bf0 net/sched/sch_api.c:1731 rtnetlink_rcv_msg+0x439/0xd30 net/core/rtnetlink.c:6423 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2546 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x539/0x800 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x93c/0xe30 net/netlink/af_netlink.c:1911 sock_sendmsg_nosec net/socket.c:725 [inline] sock_sendmsg+0xd9/0x180 net/socket.c:748 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2494 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2548 __sys_sendmsg+0x117/0x1e0 net/socket.c:2577 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f1232c17839 Code: 48 83 c4 28 c3 e8 27 18 00 00 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc05125308 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000000003f RCX: 00007f1232c17839 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 RBP: 00007f1232c8e0d0 R08: 00007ffc05125380 R09: 00007ffc05125380 R10: 00007ffc05125380 R11: 0000000000000246 R12: 00007f1232c8a5f0 R13: 00007ffc05125508 R14: 0000000000000001 R15: 0000000000000001 </TASK> --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, 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 change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
