RBP: 00007f4302832bd9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4302a16128 R14: 00007f4302a16090 R15: 00007ffc22134d68 watchdog: BUG: soft lockup - CPU#0 stuck for 225s! [syz.6.17:616] Modules linked in: CPU: 0 PID: 616 Comm: syz.6.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:209 Code: 89 fb e8 23 00 00 00 48 8b 3d 8c bd be 05 48 89 de e8 74 ca 42 00 5b 5d c3 00 90 90 90 90 90 90 90 90 90 90 90 b8 0c 67 40 a5 <55> 48 89 e5 48 8b 45 08 65 48 8b 0d 10 af 92 7e 65 8b 15 11 af 92 RSP: 0018:ffffc90001716e80 EFLAGS: 00000246 RAX: ffffffff85bc8b00 RBX: dffffc0000000000 RCX: 1ffffffff0b79160 RDX: ffff88810e81d3c0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90001716ed0 R08: ffff88810e81d3c0 R09: 0000000000000002 R10: 00000000ffffffff R11: 0000000000000000 R12: 00000000fffffff1 R13: ffff88810f748800 R14: ffffffff85bc8ae0 R15: ffff88810f748800 FS: 00007f43037156c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f430284eaeb CR3: 0000000118002000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fq_change+0xc4c/0x1240 net/sched/sch_fq.c:912 fq_init+0x3e3/0x5d0 net/sched/sch_fq.c:960 qdisc_create+0x895/0x1180 net/sched/sch_api.c:1305 tc_modify_qdisc+0x900/0x19d0 net/sched/sch_api.c:-1 rtnetlink_rcv_msg+0xb3b/0xe00 net/core/rtnetlink.c:6150 netlink_rcv_skb+0x20f/0x460 net/netlink/af_netlink.c:2511 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:6168 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x8ab/0xa30 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x8b9/0xbd0 net/netlink/af_netlink.c:1872 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] ____sys_sendmsg+0x5cc/0x990 net/socket.c:2518 ___sys_sendmsg+0x2a2/0x360 net/socket.c:2572 __sys_sendmsg net/socket.c:2601 [inline] __do_sys_sendmsg net/socket.c:2610 [inline] __se_sys_sendmsg net/socket.c:2608 [inline] __x64_sys_sendmsg+0x205/0x2d0 net/socket.c:2608 x64_sys_call+0x171/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f430279c799 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:00007f4303715028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f4302a16090 RCX: 00007f430279c799 RDX: 0000000000000010 RSI: 0000200000001200 RDI: 0000000000000006 RBP: 00007f4302832bd9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4302a16128 R14: 00007f4302a16090 R15: 00007ffc22134d68 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] NMI backtrace for cpu 1 skipped: idling at default_idle+0xf/0x20 arch/x86/kernel/process.c:741