RBP: 00007f560c2c306b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f560c4b4038 R14: 00007f560c4b3fa0 R15: 00007ffd34dca0c8
watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [syz.6.1000:4147]
Modules linked in:
CPU: 0 PID: 4147 Comm: syz.6.1000 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:qdisc_lookup+0x261/0x4d0 net/sched/sch_api.c:310
Code: 80 3c 28 00 74 08 4c 89 f7 e8 fb 04 ed fd 4d 8b 36 4d 85 f6 0f 84 ba 00 00 00 49 83 c6 10 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 <74> 08 4c 89 f7 e8 d5 04 ed fd 4d 8b 36 4d 8d 7e 40 4c 89 f8 48 c1
RSP: 0018:ffffc90000f97018 EFLAGS: 00000246
RAX: 1ffff11022e93402 RBX: 00000000ffff0000 RCX: 0000000000080000
RDX: ffffc900098cc000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc90000f97048 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520001f2e08 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88811749a010 R15: ffff888113dec000
FS:  00007f560ac856c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2e6698 CR3: 000000012e6e9000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 qdisc_tree_reduce_backlog+0x10b/0x380 net/sched/sch_api.c:797
 sfq_change net/sched/sch_sfq.c:737 [inline]
 sfq_init+0x19e6/0x2620 net/sched/sch_sfq.c:801
 qdisc_create+0x84c/0x1220 net/sched/sch_api.c:1269
 tc_modify_qdisc+0x8c2/0x1470 net/sched/sch_api.c:-1
 rtnetlink_rcv_msg+0x9e9/0xca0 net/core/rtnetlink.c:5622
 netlink_rcv_skb+0x1e9/0x430 net/netlink/af_netlink.c:2508
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5640
 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
 netlink_unicast+0x86c/0xa30 net/netlink/af_netlink.c:1340
 netlink_sendmsg+0x949/0xb70 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 ____sys_sendmsg+0x5be/0x8f0 net/socket.c:2377
 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2431
 __sys_sendmsg net/socket.c:2460 [inline]
 __do_sys_sendmsg net/socket.c:2469 [inline]
 __se_sys_sendmsg net/socket.c:2467 [inline]
 __x64_sys_sendmsg+0x201/0x2d0 net/socket.c:2467
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f560c22c159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f560ac85028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f560c4b3fa0 RCX: 00007f560c22c159
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000005
RBP: 00007f560c2c306b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f560c4b4038 R14: 00007f560c4b3fa0 R15: 00007ffd34dca0c8