INFO: rcu detected stall in rtnl_setlink (3)

Status: auto-obsoleted due to no activity on 2026/03/17 00:18
Subsystems: net
[Documentation on labels]
First crash: 332d, last: 332d
▶ ▼ Similar bugs (8)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 INFO: rcu detected stall in rtnl_setlink (2) 1 1 353d 353d 0/3 auto-obsoleted due to no activity on 2026/03/05 21:41
upstream INFO: rcu detected stall in rtnl_setlink (2) net 1 1 569d 569d 0/29 auto-obsoleted due to no activity on 2025/07/22 03:11
linux-6.1 INFO: rcu detected stall in rtnl_setlink 1 3 91d 153d 0/3 upstream: reported on 2026/06/13 18:38
upstream INFO: rcu detected stall in rtnl_setlink batman 1 1 1899d 1899d 0/29 auto-closed as invalid on 2021/11/30 03:45
linux-5.15 INFO: rcu detected stall in rtnl_setlink origin:lts-only 1 syz, C inconclusive 16 980d 1142d 0/3 auto-obsoleted due to no activity on 2024/10/03 07:39
linux-5.15 INFO: rcu detected stall in rtnl_setlink (3) 1 1 92d 92d 0/3 upstream: reported on 2026/08/13 12:25
linux-4.14 BUG: soft lockup in rtnl_setlink 1 1 1645d 1645d 0/1 auto-obsoleted due to no activity on 2022/09/10 23:34
android-5-15 BUG: soft lockup in rtnl_setlink 1 1 929d 929d 0/2 auto-obsoleted due to no activity on 2024/07/27 10:01

Sample crash report:
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=d914/1/0x4000000000000000 softirq=192307/192308 fqs=5242
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     6042          0            0
rcu: 	cputime:      142      52346            3   ==> 52490(ms)
rcu: 	(t=10501 jiffies g=142085 q=2063 ncpus=2)
CPU: 0 UID: 0 PID: 27910 Comm: syz.7.5568 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:-1 [inline]
RIP: 0010:taprio_dequeue_tc_priority+0x1c3/0x750 net/sched/sch_taprio.c:796
Code: 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 42 0f b6 04 20 84 c0 0f
RSP: 0018:ffffc90000007b40 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888069813d00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff888029315800
RBP: 1ffff110058ab66a R08: ffffffff89615756 R09: ffffffff8df41cc0
R10: 0000000000000001 R11: ffffffff89549fc0 R12: dffffc0000000000
R13: ffff88802c55b354 R14: 0000000000000010 R15: 0000000000000002
FS:  00007f8e4d2c76c0(0000) GS:ffff8881260b1000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c370ddb CR3: 00000000851a0000 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+0x7ac/0x9f0 net/core/dev.c:5781
 handle_softirqs+0x27d/0x850 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x1f0 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+0x846/0xb60 kernel/printk/printk.c:3289
Code: ff ff e8 1d 0e 20 00 90 0f 0b 90 e9 53 fc ff ff e8 0f 0e 20 00 e8 5a 05 a8 09 48 85 db 74 c0 e8 00 0e 20 00 fb 48 8b 5c 24 10 <48> 8b 44 24 20 42 80 3c 20 00 4c 8b 74 24 18 74 08 4c 89 f7 e8 f1
RSP: 0018:ffffc90003ece9c0 EFLAGS: 00000283
RAX: ffffffff81a13c60 RBX: ffffc90003eceb60 RCX: 0000000000080000
RDX: ffffc90004b5d000 RSI: 0000000000002829 RDI: 000000000000282a
RBP: ffffc90003eceb10 R08: ffffffff8f805a77 R09: 1ffffffff1f00b4e
R10: dffffc0000000000 R11: fffffbfff1f00b4f R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffffffff8e77f4e0
 __console_flush_and_unlock kernel/printk/printk.c:3319 [inline]
 console_unlock+0xbb/0x190 kernel/printk/printk.c:3359
 vprintk_emit+0x4f8/0x5f0 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_parse+0x40/0x60 lib/nlattr.c:732
 __nlmsg_parse include/net/netlink.h:789 [inline]
 nlmsg_parse_deprecated include/net/netlink.h:830 [inline]
 rtnl_setlink+0x1c3/0x890 net/core/rtnetlink.c:3443
 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:718 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:733
 sock_write_iter+0x279/0x360 net/socket.c:1186
 do_iter_readv_writev+0x623/0x8c0 fs/read_write.c:-1
 vfs_writev+0x31a/0x960 fs/read_write.c:1057
 do_writev+0x14d/0x2d0 fs/read_write.c:1103
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8e4c38f749
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:00007f8e4d2c7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f8e4c5e5fa0 RCX: 00007f8e4c38f749
RDX: 0000000000000001 RSI: 00002000000001c0 RDI: 0000000000000006
RBP: 00007f8e4c413f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8e4c5e6038 R14: 00007f8e4c5e5fa0 R15: 00007ffcf3dad128
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 27910 Comm: syz.7.5568 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+0x28/0x70 kernel/kcov.c:217
Code: 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 f0 76 92 65 8b 15 b8 a5 b5 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 00 83 fa 02 75 21 48 8b
RSP: 0018:ffffc90000007ad0 EFLAGS: 00000246
RAX: ffffffff8962075e RBX: ffff888029312000 RCX: ffff888069813d00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff888029312000
RBP: ffff88802c55b000 R08: ffffffff89615756 R09: ffffffff8df41cc0
R10: 0000000000000001 R11: ffffffff89549fc0 R12: dffffc0000000000
R13: ffff888030c80000 R14: ffff888029312000 R15: ffffffff8f80e228
FS:  00007f8e4d2c76c0(0000) GS:ffff8881260b1000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c370ddb CR3: 00000000851a0000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 taprio_dequeue_from_txq+0x48e/0x980 net/sched/sch_taprio.c:727
 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+0x7ac/0x9f0 net/core/dev.c:5781
 handle_softirqs+0x27d/0x850 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x1f0 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+0x846/0xb60 kernel/printk/printk.c:3289
Code: ff ff e8 1d 0e 20 00 90 0f 0b 90 e9 53 fc ff ff e8 0f 0e 20 00 e8 5a 05 a8 09 48 85 db 74 c0 e8 00 0e 20 00 fb 48 8b 5c 24 10 <48> 8b 44 24 20 42 80 3c 20 00 4c 8b 74 24 18 74 08 4c 89 f7 e8 f1
RSP: 0018:ffffc90003ece9c0 EFLAGS: 00000283
RAX: ffffffff81a13c60 RBX: ffffc90003eceb60 RCX: 0000000000080000
RDX: ffffc90004b5d000 RSI: 0000000000002829 RDI: 000000000000282a
RBP: ffffc90003eceb10 R08: ffffffff8f805a77 R09: 1ffffffff1f00b4e
R10: dffffc0000000000 R11: fffffbfff1f00b4f R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffffffff8e77f4e0
 __console_flush_and_unlock kernel/printk/printk.c:3319 [inline]
 console_unlock+0xbb/0x190 kernel/printk/printk.c:3359
 vprintk_emit+0x4f8/0x5f0 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_parse+0x40/0x60 lib/nlattr.c:732
 __nlmsg_parse include/net/netlink.h:789 [inline]
 nlmsg_parse_deprecated include/net/netlink.h:830 [inline]
 rtnl_setlink+0x1c3/0x890 net/core/rtnetlink.c:3443
 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:718 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:733
 sock_write_iter+0x279/0x360 net/socket.c:1186
 do_iter_readv_writev+0x623/0x8c0 fs/read_write.c:-1
 vfs_writev+0x31a/0x960 fs/read_write.c:1057
 do_writev+0x14d/0x2d0 fs/read_write.c:1103
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8e4c38f749
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:00007f8e4d2c7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f8e4c5e5fa0 RCX: 00007f8e4c38f749
RDX: 0000000000000001 RSI: 00002000000001c0 RDI: 0000000000000006
RBP: 00007f8e4c413f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8e4c5e6038 R14: 00007f8e4c5e5fa0 R15: 00007ffcf3dad128
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 27910 Comm: syz.7.5568 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+0x2f/0x70 kernel/kcov.c:217
Code: 8b 04 24 65 48 8b 0c 25 08 f0 76 92 65 8b 15 b8 a5 b5 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 00 83 fa 02 75 21 48 8b 91 50 16 00 00 48 8b
RSP: 0018:ffffc90000007b38 EFLAGS: 00000246
RAX: ffffffff8961fe40 RBX: 0000000000000000 RCX: ffff888069813d00
RDX: 0000000000000100 RSI: 0000000000000010 RDI: 000000000000000b
RBP: 1ffff110058ab66a R08: ffffffff89615756 R09: ffffffff8df41cc0
R10: 0000000000000001 R11: ffffffff89549fc0 R12: dffffc0000000000
R13: ffff88802c55b354 R14: 0000000000000010 R15: 0000000000000002
FS:  00007f8e4d2c76c0(0000) GS:ffff8881260b1000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c370ddb CR3: 00000000851a0000 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+0x7ac/0x9f0 net/core/dev.c:5781
 handle_softirqs+0x27d/0x850 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x1f0 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+0x846/0xb60 kernel/printk/printk.c:3289
Code: ff ff e8 1d 0e 20 00 90 0f 0b 90 e9 53 fc ff ff e8 0f 0e 20 00 e8 5a 05 a8 09 48 85 db 74 c0 e8 00 0e 20 00 fb 48 8b 5c 24 10 <48> 8b 44 24 20 42 80 3c 20 00 4c 8b 74 24 18 74 08 4c 89 f7 e8 f1
RSP: 0018:ffffc90003ece9c0 EFLAGS: 00000283
RAX: ffffffff81a13c60 RBX: ffffc90003eceb60 RCX: 0000000000080000
RDX: ffffc90004b5d000 RSI: 0000000000002829 RDI: 000000000000282a
RBP: ffffc90003eceb10 R08: ffffffff8f805a77 R09: 1ffffffff1f00b4e
R10: dffffc0000000000 R11: fffffbfff1f00b4f R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffffffff8e77f4e0
 __console_flush_and_unlock kernel/printk/printk.c:3319 [inline]
 console_unlock+0xbb/0x190 kernel/printk/printk.c:3359
 vprintk_emit+0x4f8/0x5f0 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_parse+0x40/0x60 lib/nlattr.c:732
 __nlmsg_parse include/net/netlink.h:789 [inline]
 nlmsg_parse_deprecated include/net/netlink.h:830 [inline]
 rtnl_setlink+0x1c3/0x890 net/core/rtnetlink.c:3443
 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:718 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:733
 sock_write_iter+0x279/0x360 net/socket.c:1186
 do_iter_readv_writev+0x623/0x8c0 fs/read_write.c:-1
 vfs_writev+0x31a/0x960 fs/read_write.c:1057
 do_writev+0x14d/0x2d0 fs/read_write.c:1103
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8e4c38f749
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:00007f8e4d2c7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f8e4c5e5fa0 RCX: 00007f8e4c38f749
RDX: 0000000000000001 RSI: 00002000000001c0 RDI: 0000000000000006
RBP: 00007f8e4c413f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8e4c5e6038 R14: 00007f8e4c5e5fa0 R15: 00007ffcf3dad128
 </TASK>
watchdog: BUG: soft lockup - CPU#0 stuck for 286s! [syz.7.5568:27910]
Modules linked in:
irq event stamp: 71439
hardirqs last  enabled at (71438): [<ffffffff8b494f9d>] irqentry_exit+0x5dd/0x660 kernel/entry/common.c:219
hardirqs last disabled at (71439): [<ffffffff8b49380e>] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056
softirqs last  enabled at (1728): [<ffffffff89214ce0>] local_bh_disable include/linux/bottom_half.h:20 [inline]
softirqs last  enabled at (1728): [<ffffffff89214ce0>] __alloc_skb+0x200/0x430 net/core/skbuff.c:672
softirqs last disabled at (1739): [<ffffffff8185372a>] __do_softirq kernel/softirq.c:656 [inline]
softirqs last disabled at (1739): [<ffffffff8185372a>] invoke_softirq kernel/softirq.c:496 [inline]
softirqs last disabled at (1739): [<ffffffff8185372a>] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723
CPU: 0 UID: 0 PID: 27910 Comm: syz.7.5568 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:taprio_dequeue_from_txq+0x83/0x980 net/sched/sch_taprio.c:712
Code: 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 ef e8 32 2b c5 f8 4d 8b 6d 00 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 e7 e8 0f 2b c5 f8 4d 63 ff 49 c1 e7 03 4d
RSP: 0018:ffffc90000007ad8 EFLAGS: 00000a06
RAX: 1ffff110058ab650 RBX: ffff88802c55b000 RCX: dffffc0000000000
RDX: 0000000000000100 RSI: 000000000000000b RDI: ffff88802c55b000
RBP: 1ffff110058ab66a R08: ffffffff89615756 R09: ffffffff8df41cc0
R10: 0000000000000001 R11: ffffffff89549fc0 R12: ffff88802c55b280
R13: ffff888030c80000 R14: ffff8880637aa400 R15: 000000000000000b
FS:  00007f8e4d2c76c0(0000) GS:ffff8881260b1000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c370ddb CR3: 00000000851a0000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 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+0x7ac/0x9f0 net/core/dev.c:5781
 handle_softirqs+0x27d/0x850 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x1f0 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+0x846/0xb60 kernel/printk/printk.c:3289
Code: ff ff e8 1d 0e 20 00 90 0f 0b 90 e9 53 fc ff ff e8 0f 0e 20 00 e8 5a 05 a8 09 48 85 db 74 c0 e8 00 0e 20 00 fb 48 8b 5c 24 10 <48> 8b 44 24 20 42 80 3c 20 00 4c 8b 74 24 18 74 08 4c 89 f7 e8 f1
RSP: 0018:ffffc90003ece9c0 EFLAGS: 00000283
RAX: ffffffff81a13c60 RBX: ffffc90003eceb60 RCX: 0000000000080000
RDX: ffffc90004b5d000 RSI: 0000000000002829 RDI: 000000000000282a
RBP: ffffc90003eceb10 R08: ffffffff8f805a77 R09: 1ffffffff1f00b4e
R10: dffffc0000000000 R11: fffffbfff1f00b4f R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffffffff8e77f4e0
 __console_flush_and_unlock kernel/printk/printk.c:3319 [inline]
 console_unlock+0xbb/0x190 kernel/printk/printk.c:3359
 vprintk_emit+0x4f8/0x5f0 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_parse+0x40/0x60 lib/nlattr.c:732
 __nlmsg_parse include/net/netlink.h:789 [inline]
 nlmsg_parse_deprecated include/net/netlink.h:830 [inline]
 rtnl_setlink+0x1c3/0x890 net/core/rtnetlink.c:3443
 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:718 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:733
 sock_write_iter+0x279/0x360 net/socket.c:1186
 do_iter_readv_writev+0x623/0x8c0 fs/read_write.c:-1
 vfs_writev+0x31a/0x960 fs/read_write.c:1057
 do_writev+0x14d/0x2d0 fs/read_write.c:1103
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8e4c38f749
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:00007f8e4d2c7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f8e4c5e5fa0 RCX: 00007f8e4c38f749
RDX: 0000000000000001 RSI: 00002000000001c0 RDI: 0000000000000006
RBP: 00007f8e4c413f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8e4c5e6038 R14: 00007f8e4c5e5fa0 R15: 00007ffcf3dad128
 </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: 53 ec 02 00 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 0d 1f 00 f3 0f 1e fa fb f4 <c3> cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000197de0 EFLAGS: 000002c6
RAX: 00cf19b942ae8e00 RBX: ffffffff8197438a RCX: 00cf19b942ae8e00
RDX: 0000000000000001 RSI: ffffffff8d76bd39 RDI: ffffffff8bbfc660
RBP: ffffc90000197f10 R08: ffff8880b893359b R09: 1ffff110171266b3
R10: dffffc0000000000 R11: ffffed10171266b4 R12: ffffffff8f805a70
R13: 1ffff11003952b70 R14: 0000000000000001 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8881261b1000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd30f115000 CR3: 0000000075560000 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+0x1ea/0x520 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
2025/12/17 00:13 net-next 8f7aa3d3c732 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: rcu detected stall in rtnl_setlink
* Struck through repros no longer work on HEAD.