INFO: rcu detected stall in inet_rtm_newroute

Status: auto-obsoleted due to no activity on 2026/04/16 16:13
Subsystems: net
[Documentation on labels]
First crash: 225d, last: 225d
▶ ▼ ✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision
3168fff7 repro ❓ INFO: rcu detected stall in inet_rtm_newroute 2026/03/07 23:54 2026/03/07 23:54 2026/03/08 00:05 31e9c887
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 INFO: rcu detected stall in inet_rtm_newroute 1 1 209d 209d 0/3 auto-obsoleted due to no activity on 2026/05/11 20:30
linux-6.6 INFO: rcu detected stall in inet_rtm_newroute 1 1 71d 71d 0/2 upstream: reported on 2026/06/19 07:06

Sample crash report:
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=6c7c/1/0x4000000000000000 softirq=225044/225045 fqs=5216
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     8160          0            0
rcu: 	cputime:      211      52268            5   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=207761 q=2616 ncpus=2)
CPU: 0 UID: 0 PID: 8027 Comm: syz.0.10864 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:qdisc_peek_head+0x0/0x40 include/net/sch_generic.h:1180
Code: 4c 89 ff e8 52 c9 c3 f8 e9 95 fe ff ff 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 53 48 89 fb e8 93 a6 5d f8 48 81 c3 40 01 00 00 48 89
RSP: 0018:ffffc90000007c68 EFLAGS: 00000246
RAX: 1ffffffff1f05807 RBX: ffff88807af6e800 RCX: 0000000000000100
RDX: ffff88802595bd00 RSI: 0000000000000000 RDI: ffff88807af6e800
RBP: ffff88808d784000 R08: ffffffff89702936 R09: ffffffff8df41aa0
R10: 0000000000000001 R11: ffffffff89635210 R12: dffffc0000000000
R13: ffff888045fb8000 R14: ffff88807af6e800 R15: ffffffff8f82c038
FS:  00007f1cab5766c0(0000) GS:ffff888125e1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000022c0 CR3: 0000000056290000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 taprio_dequeue_from_txq+0x174/0x980 net/sched/sch_taprio.c:726
 taprio_dequeue_tc_priority+0x1ac/0x750 net/sched/sch_taprio.c:793
 taprio_dequeue+0x186/0x550 net/sched/sch_taprio.c:-1
 dequeue_skb net/sched/sch_generic.c:297 [inline]
 qdisc_restart net/sched/sch_generic.c:402 [inline]
 __qdisc_run+0x23f/0x1510 net/sched/sch_generic.c:420
 qdisc_run+0xc7/0x300 include/net/pkt_sched.h:120
 net_tx_action+0x717/0x900 net/core/dev.c:5795
 handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:console_flush_one_record arch/x86/include/asm/irqflags.h:-1 [inline]
RIP: 0010:console_flush_all+0x7fc/0xb00 kernel/printk/printk.c:3289
Code: ff ff e8 b7 f9 1f 00 90 0f 0b 90 e9 85 fc ff ff e8 a9 f9 1f 00 e8 14 42 b9 09 48 85 db 74 c0 e8 9a f9 1f 00 fb 48 8b 5c 24 10 <48> 8b 44 24 20 42 80 3c 28 00 4c 8b 74 24 18 74 08 4c 89 f7 e8 6b
RSP: 0018:ffffc9000b716fc0 EFLAGS: 00000283
RAX: ffffffff81a0ff16 RBX: ffffc9000b717120 RCX: 0000000000080000
RDX: ffffc90013cb5000 RSI: 0000000000002b2b RDI: 0000000000002b2c
RBP: ffffc9000b7170d0 R08: ffffffff8f823877 R09: 1ffffffff1f0470e
R10: dffffc0000000000 R11: fffffbfff1f0470f R12: 0000000000000001
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8e792280
 __console_flush_and_unlock kernel/printk/printk.c:3319 [inline]
 console_unlock+0xbb/0x190 kernel/printk/printk.c:3359
 vprintk_emit+0x47b/0x550 kernel/printk/printk.c:2426
 _printk+0xcf/0x120 kernel/printk/printk.c:2451
 validate_nla lib/nlattr.c:414 [inline]
 __nla_validate_parse+0x1719/0x2d40 lib/nlattr.c:635
 __nla_validate+0x40/0x60 lib/nlattr.c:677
 nlmsg_validate_deprecated include/net/netlink.h:931 [inline]
 rtm_to_fib_config+0x91/0x13c0 net/ipv4/fib_frontend.c:743
 inet_rtm_newroute+0xf3/0x210 net/ipv4/fib_frontend.c:918
 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6958
 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:742
 __sys_sendto+0x3bd/0x520 net/socket.c:2206
 __do_sys_sendto net/socket.c:2213 [inline]
 __se_sys_sendto net/socket.c:2209 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2209
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1caa78f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1cab576038 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f1caa9e5fa0 RCX: 00007f1caa78f749
RDX: 0000000000000078 RSI: 00002000000022c0 RDI: 0000000000000007
RBP: 00007f1caa813f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1caa9e6038 R14: 00007f1caa9e5fa0 R15: 00007ffc833046c8
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 8027 Comm: syz.0.10864 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:taprio_next_tc_txq net/sched/sch_taprio.c:765 [inline]
RIP: 0010:taprio_dequeue_tc_priority+0x1bb/0x750 net/sched/sch_taprio.c:796
Code: a6 02 00 00 41 8b 75 00 48 8b 7c 24 48 48 8b 54 24 50 8b 4c 24 1c e8 b4 05 00 00 48 89 44 24 10 48 8b 44 24 58 42 0f b6 04 20 <84> c0 0f 85 96 02 00 00 48 8b 44 24 20 44 0f b7 30 48 8b 44 24 70
RSP: 0018:ffffc90000007cd8 EFLAGS: 00000286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88802595bd00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff88807af6e800
RBP: 1ffff11011af086a R08: ffffffff89702936 R09: ffffffff8df41aa0
R10: 0000000000000001 R11: ffffffff89635210 R12: dffffc0000000000
R13: ffff88808d784354 R14: 0000000000000010 R15: 0000000000000002
FS:  00007f1cab5766c0(0000) GS:ffff888125e1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000022c0 CR3: 0000000056290000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 taprio_dequeue+0x186/0x550 net/sched/sch_taprio.c:-1
 dequeue_skb net/sched/sch_generic.c:297 [inline]
 qdisc_restart net/sched/sch_generic.c:402 [inline]
 __qdisc_run+0x23f/0x1510 net/sched/sch_generic.c:420
 qdisc_run+0xc7/0x300 include/net/pkt_sched.h:120
 net_tx_action+0x717/0x900 net/core/dev.c:5795
 handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:console_flush_one_record arch/x86/include/asm/irqflags.h:-1 [inline]
RIP: 0010:console_flush_all+0x7fc/0xb00 kernel/printk/printk.c:3289
Code: ff ff e8 b7 f9 1f 00 90 0f 0b 90 e9 85 fc ff ff e8 a9 f9 1f 00 e8 14 42 b9 09 48 85 db 74 c0 e8 9a f9 1f 00 fb 48 8b 5c 24 10 <48> 8b 44 24 20 42 80 3c 28 00 4c 8b 74 24 18 74 08 4c 89 f7 e8 6b
RSP: 0018:ffffc9000b716fc0 EFLAGS: 00000283
RAX: ffffffff81a0ff16 RBX: ffffc9000b717120 RCX: 0000000000080000
RDX: ffffc90013cb5000 RSI: 0000000000002b2b RDI: 0000000000002b2c
RBP: ffffc9000b7170d0 R08: ffffffff8f823877 R09: 1ffffffff1f0470e
R10: dffffc0000000000 R11: fffffbfff1f0470f R12: 0000000000000001
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8e792280
 __console_flush_and_unlock kernel/printk/printk.c:3319 [inline]
 console_unlock+0xbb/0x190 kernel/printk/printk.c:3359
 vprintk_emit+0x47b/0x550 kernel/printk/printk.c:2426
 _printk+0xcf/0x120 kernel/printk/printk.c:2451
 validate_nla lib/nlattr.c:414 [inline]
 __nla_validate_parse+0x1719/0x2d40 lib/nlattr.c:635
 __nla_validate+0x40/0x60 lib/nlattr.c:677
 nlmsg_validate_deprecated include/net/netlink.h:931 [inline]
 rtm_to_fib_config+0x91/0x13c0 net/ipv4/fib_frontend.c:743
 inet_rtm_newroute+0xf3/0x210 net/ipv4/fib_frontend.c:918
 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6958
 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:742
 __sys_sendto+0x3bd/0x520 net/socket.c:2206
 __do_sys_sendto net/socket.c:2213 [inline]
 __se_sys_sendto net/socket.c:2209 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2209
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1caa78f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1cab576038 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f1caa9e5fa0 RCX: 00007f1caa78f749
RDX: 0000000000000078 RSI: 00002000000022c0 RDI: 0000000000000007
RBP: 00007f1caa813f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1caa9e6038 R14: 00007f1caa9e5fa0 R15: 00007ffc833046c8
 </TASK>
watchdog: BUG: soft lockup - CPU#0 stuck for 266s! [syz.0.10864:8027]
Modules linked in:
irq event stamp: 88215
hardirqs last  enabled at (88214): [<ffffffff8b5a4e28>] irqentry_exit+0x5e8/0x670 kernel/entry/common.c:219
hardirqs last disabled at (88215): [<ffffffff8b5a37ae>] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056
softirqs last  enabled at (268): [<ffffffff89380060>] local_bh_disable include/linux/bottom_half.h:20 [inline]
softirqs last  enabled at (268): [<ffffffff89380060>] rcu_read_lock_bh include/linux/rcupdate.h:918 [inline]
softirqs last  enabled at (268): [<ffffffff89380060>] __dev_queue_xmit+0x280/0x3100 net/core/dev.c:4756
softirqs last disabled at (281): [<ffffffff81853b70>] __do_softirq kernel/softirq.c:656 [inline]
softirqs last disabled at (281): [<ffffffff81853b70>] invoke_softirq kernel/softirq.c:496 [inline]
softirqs last disabled at (281): [<ffffffff81853b70>] __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723
CPU: 0 UID: 0 PID: 8027 Comm: syz.0.10864 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x20/0x70 kernel/kcov.c:217
Code: 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 40 80 92 65 8b 15 68 47 bf 10 81 e2 00 01 ff 00 74 11 <81> fa 00 01 00 00 75 35 83 b9 6c 16 00 00 00 74 2c 8b 91 48 16 00
RSP: 0018:ffffc90000007cd0 EFLAGS: 00000206
RAX: ffffffff8970d020 RBX: 0000000000000000 RCX: ffff88802595bd00
RDX: 0000000000000100 RSI: 0000000000000010 RDI: 0000000000000008
RBP: 1ffff11011af086a R08: ffffffff89702936 R09: ffffffff8df41aa0
R10: 0000000000000001 R11: ffffffff89635210 R12: dffffc0000000000
R13: ffff88808d784354 R14: 0000000000000010 R15: 0000000000000002
FS:  00007f1cab5766c0(0000) GS:ffff888125e1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000022c0 CR3: 0000000056290000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 taprio_dequeue_tc_priority+0x2d0/0x750 net/sched/sch_taprio.c:803
 taprio_dequeue+0x186/0x550 net/sched/sch_taprio.c:-1
 dequeue_skb net/sched/sch_generic.c:297 [inline]
 qdisc_restart net/sched/sch_generic.c:402 [inline]
 __qdisc_run+0x23f/0x1510 net/sched/sch_generic.c:420
 qdisc_run+0xc7/0x300 include/net/pkt_sched.h:120
 net_tx_action+0x717/0x900 net/core/dev.c:5795
 handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:console_flush_one_record arch/x86/include/asm/irqflags.h:-1 [inline]
RIP: 0010:console_flush_all+0x7fc/0xb00 kernel/printk/printk.c:3289
Code: ff ff e8 b7 f9 1f 00 90 0f 0b 90 e9 85 fc ff ff e8 a9 f9 1f 00 e8 14 42 b9 09 48 85 db 74 c0 e8 9a f9 1f 00 fb 48 8b 5c 24 10 <48> 8b 44 24 20 42 80 3c 28 00 4c 8b 74 24 18 74 08 4c 89 f7 e8 6b
RSP: 0018:ffffc9000b716fc0 EFLAGS: 00000283
RAX: ffffffff81a0ff16 RBX: ffffc9000b717120 RCX: 0000000000080000
RDX: ffffc90013cb5000 RSI: 0000000000002b2b RDI: 0000000000002b2c
RBP: ffffc9000b7170d0 R08: ffffffff8f823877 R09: 1ffffffff1f0470e
R10: dffffc0000000000 R11: fffffbfff1f0470f R12: 0000000000000001
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8e792280
 __console_flush_and_unlock kernel/printk/printk.c:3319 [inline]
 console_unlock+0xbb/0x190 kernel/printk/printk.c:3359
 vprintk_emit+0x47b/0x550 kernel/printk/printk.c:2426
 _printk+0xcf/0x120 kernel/printk/printk.c:2451
 validate_nla lib/nlattr.c:414 [inline]
 __nla_validate_parse+0x1719/0x2d40 lib/nlattr.c:635
 __nla_validate+0x40/0x60 lib/nlattr.c:677
 nlmsg_validate_deprecated include/net/netlink.h:931 [inline]
 rtm_to_fib_config+0x91/0x13c0 net/ipv4/fib_frontend.c:743
 inet_rtm_newroute+0xf3/0x210 net/ipv4/fib_frontend.c:918
 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6958
 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:742
 __sys_sendto+0x3bd/0x520 net/socket.c:2206
 __do_sys_sendto net/socket.c:2213 [inline]
 __se_sys_sendto net/socket.c:2209 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2209
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1caa78f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1cab576038 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f1caa9e5fa0 RCX: 00007f1caa78f749
RDX: 0000000000000078 RSI: 00002000000022c0 RDI: 0000000000000007
RBP: 00007f1caa813f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1caa9e6038 R14: 00007f1caa9e5fa0 R15: 00007ffc833046c8
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 53 11 0e 00 f3 0f 1e fa fb f4 <e9> 08 e3 02 00 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000197e20 EFLAGS: 000002c6
RAX: 000000000047c991 RBX: ffffffff8197149e RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8d794248 RDI: ffffffff8bc086e0
RBP: ffffc90000197f10 R08: ffff8880b87336db R09: 1ffff110170e66db
R10: dffffc0000000000 R11: ffffed10170e66dc R12: ffffffff8f823870
R13: 1ffff110038dfb70 R14: 0000000000000001 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888125f1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc9caae249c CR3: 000000000dd3a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
 default_idle+0x13/0x20 arch/x86/kernel/process.c:767
 default_idle_call+0x73/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:191 [inline]
 do_idle+0x1be/0x4d0 kernel/sched/idle.c:332
 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:430
 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
 common_startup_64+0x13e/0x147
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/16 16:06 net-next 74ecff77dace d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: rcu detected stall in inet_rtm_newroute
* Struck through repros no longer work on HEAD.