INFO: rcu detected stall in sock_write

Kernel	Title	Repro	Cause bisect	Count	Last	Reported	Patched	Status
linux-5.15	INFO: rcu detected stall in sock_write_iter (3)			1	95d	95d	0/3	upstream: reported on 2024/10/23 00:48
upstream	INFO: rcu detected stall in sock_write_iter (3) net	C	done	135	5d07h	263d	0/28	upstream: reported C repro on 2024/05/07 12:14
linux-5.15	INFO: rcu detected stall in sock_write_iter			1	463d	463d	0/3	auto-obsoleted due to no activity on 2024/01/28 05:21
linux-5.15	INFO: rcu detected stall in sock_write_iter (2)			1	281d	281d	0/3	auto-obsoleted due to no activity on 2024/07/28 08:46
linux-6.1	INFO: rcu detected stall in sock_write_iter			1	296d	296d	0/3	auto-obsoleted due to no activity on 2024/07/13 13:13
upstream	INFO: rcu detected stall in sock_write_iter (2) netfilter			1	449d	449d	0/28	auto-obsoleted due to no activity on 2024/01/03 00:51

rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-...!: (10499 ticks this GP) idle=f8e/1/0x4000000000000002 softirq=11789/11789 fqs=8 (t=10500 jiffies g=6233 q=432) rcu: rcu_preempt kthread starved for 10482 jiffies! g6233 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29032 10 2 0x80004000 Call Trace: context_switch kernel/sched/core.c:3385 [inline] __schedule+0x9a0/0xcc0 kernel/sched/core.c:4081 schedule+0x181/0x210 kernel/sched/core.c:4155 schedule_timeout+0x14f/0x240 kernel/time/timer.c:1895 rcu_gp_fqs_loop kernel/rcu/tree.c:1661 [inline] rcu_gp_kthread+0xed8/0x1770 kernel/rcu/tree.c:1821 kthread+0x332/0x350 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 NMI backtrace for cpu 1 CPU: 1 PID: 8186 Comm: syz-executor.0 Not tainted 5.4.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fb/0x318 lib/dump_stack.c:118 nmi_cpu_backtrace+0xaf/0x1a0 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x174/0x290 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x10/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x15a/0x220 kernel/rcu/tree_stall.h:254 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline] check_cpu_stall kernel/rcu/tree_stall.h:529 [inline] rcu_pending kernel/rcu/tree.c:2827 [inline] rcu_sched_clock_irq+0xe25/0x1ad0 kernel/rcu/tree.c:2271 update_process_times+0x12d/0x180 kernel/time/timer.c:1726 tick_sched_handle kernel/time/tick-sched.c:167 [inline] tick_sched_timer+0x263/0x420 kernel/time/tick-sched.c:1310 __run_hrtimer kernel/time/hrtimer.c:1514 [inline] __hrtimer_run_queues+0x403/0x840 kernel/time/hrtimer.c:1576 hrtimer_interrupt+0x38c/0xda0 kernel/time/hrtimer.c:1638 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 </IRQ> RIP: 0010:__sanitizer_cov_trace_pc+0x35/0x50 kernel/kcov.c:108 Code: 02 00 65 8b 15 b8 81 8b 7e f7 c2 00 01 1f 00 75 2c 8b 91 80 13 00 00 83 fa 02 75 21 48 8b 91 88 13 00 00 48 8b 32 48 8d 7e 01 <8b> 89 84 13 00 00 48 39 cf 73 08 48 89 44 f2 08 48 89 3a c3 0f 1f RSP: 0018:ffffc900024f7478 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffffffff81486ea4 RBX: ffffea00029e0480 RCX: ffff888099e78680 RDX: ffffc900021a9000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffffc900024f74b8 R08: 000000000003a768 R09: ffffed101468ea97 R10: ffffed101468ea97 R11: 0000000000000000 R12: ffff88809798ab20 R13: dffffc0000000000 R14: 1ffff11012f31564 R15: ffff8880a34754a8 release_task_stack kernel/fork.c:440 [inline] put_task_stack+0xa3/0x130 kernel/fork.c:451 finish_task_switch+0x3f1/0x550 kernel/sched/core.c:3256 context_switch kernel/sched/core.c:3388 [inline] __schedule+0x9a8/0xcc0 kernel/sched/core.c:4081 schedule+0x181/0x210 kernel/sched/core.c:4155 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4214 mutex_optimistic_spin+0x445/0x480 kernel/locking/mutex.c:707 __mutex_lock_common+0x2e7/0x2e10 kernel/locking/mutex.c:962 __mutex_lock kernel/locking/mutex.c:1106 [inline] mutex_lock_nested+0x1b/0x30 kernel/locking/mutex.c:1121 __netlink_dump_start+0x123/0x7b0 net/netlink/af_netlink.c:2316 netlink_dump_start include/linux/netlink.h:233 [inline] rtnetlink_rcv_msg+0xacb/0xd40 net/core/rtnetlink.c:5385 netlink_rcv_skb+0x19e/0x3d0 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5440 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x767/0x920 net/netlink/af_netlink.c:1328 netlink_sendmsg+0xa21/0xd40 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg net/socket.c:659 [inline] sock_write_iter+0x2a6/0x3a0 net/socket.c:991 call_write_iter include/linux/fs.h:1902 [inline] new_sync_write fs/read_write.c:483 [inline] __vfs_write+0x5a1/0x740 fs/read_write.c:496 vfs_write+0x275/0x590 fs/read_write.c:558 ksys_write+0x117/0x220 fs/read_write.c:611 __do_sys_write fs/read_write.c:623 [inline] __se_sys_write fs/read_write.c:620 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:620 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a679 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f5202421c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a679 RDX: 0000000000000024 RSI: 00000000200000c0 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f52024226d4 R13: 00000000004c7969 R14: 00000000004e48d0 R15: 00000000ffffffff