R13: 00007f8d02708128 R14: 00007f8d02708090 R15: 00007fff9767a7b8
 </TASK>
watchdog: BUG: soft lockup - CPU#1 stuck for 267s! [syz.1.2789:10246]
Modules linked in:
CPU: 1 PID: 10246 Comm: syz.1.2789 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:qdisc_tree_reduce_backlog+0x122/0x340 net/sched/sch_api.c:782
Code: 4c 89 f7 e8 00 33 ce fd 49 8b 3e 44 89 e6 81 e6 00 00 ff ff e8 0f d9 ff ff 48 85 c0 0f 84 03 02 00 00 49 89 c5 31 ff 8b 75 d0 <e8> f9 02 8f fd 4d 8d 75 18 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08
RSP: 0018:ffffc900015b6da8 EFLAGS: 00000246
RAX: ffff888127bbc000 RBX: dffffc0000000000 RCX: ffff8881564acf00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900015b6df0 R08: ffff8881564acf00 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000000 R12: 00000000fffffff1
R13: ffff888127bbc000 R14: ffff888127bbec00 R15: ffff888127bbc040
FS:  00007f8d00ec86c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558b2b07d0 CR3: 00000001114bf000 CR4: 00000000003526a0
Call Trace:
 <TASK>
 fq_codel_change+0xa8a/0xf70 net/sched/sch_fq_codel.c:436
 fq_codel_init+0x342/0xa20 net/sched/sch_fq_codel.c:473
 qdisc_create+0x803/0x11b0 net/sched/sch_api.c:1256
 tc_modify_qdisc+0x8ad/0x1570 net/sched/sch_api.c:-1
 rtnetlink_rcv_msg+0xa4b/0xce0 net/core/rtnetlink.c:5650
 netlink_rcv_skb+0x1f5/0x440 net/netlink/af_netlink.c:2511
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5668
 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline]
 netlink_unicast+0x876/0xa40 net/netlink/af_netlink.c:1348
 netlink_sendmsg+0x879/0xb80 net/netlink/af_netlink.c:1922
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x5b7/0x8f0 net/socket.c:2435
 ___sys_sendmsg+0x236/0x2e0 net/socket.c:2489
 __sys_sendmmsg+0x2ba/0x4e0 net/socket.c:2575
 __do_sys_sendmmsg net/socket.c:2604 [inline]
 __se_sys_sendmmsg net/socket.c:2601 [inline]
 __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2601
 x64_sys_call+0x6c6/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:308
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f8d0248edd9
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:00007f8d00ec8028 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f8d02708090 RCX: 00007f8d0248edd9
RDX: 040000000000009f RSI: 00002000000002c0 RDI: 0000000000000007
RBP: 00007f8d02524d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8d02708128 R14: 00007f8d02708090 R15: 00007fff9767a7b8
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 0 skipped: idling at default_idle+0xf/0x20 arch/x86/kernel/process.c:729