syzbot


INFO: rcu detected stall in netlink_release (3)

Status: auto-closed as invalid on 2022/09/20 00:08
Reported-by: syzbot+@syzkaller.appspotmail.com
First crash: 129d, last: 129d
similar bugs (3):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in netlink_release 1 499d 499d 0/24 auto-closed as invalid on 2021/10/14 21:29
upstream INFO: rcu detected stall in netlink_release (2) 1 319d 319d 0/24 auto-closed as invalid on 2022/04/13 11:22
upstream BUG: soft lockup in netlink_release 1 216d 216d 0/24 auto-closed as invalid on 2022/06/25 01:57

Sample crash report:
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (1 GPs behind) idle=7524/1/0x4000000000000000 softirq=197160/197161 fqs=2
	(detected by 1, t=10502 jiffies, g=346957, q=179 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 12080 Comm: syz-executor.1 Not tainted 5.19.0-rc4-next-20220628-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
RIP: 0010:kasan_check_range+0xe/0x180 mm/kasan/generic.c:188
Code: 00 00 89 43 0c e8 12 e2 ff ff 89 43 08 5b 5d 41 5c c3 66 2e 0f 1f 84 00 00 00 00 00 48 85 f6 0f 84 3c 01 00 00 49 89 f9 41 54 <44> 0f b6 c2 49 01 f1 55 53 0f 82 18 01 00 00 48 b8 ff ff ff ff ff
RSP: 0018:ffffc90000007d98 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 1ffff92000000fb6 RCX: ffffffff815f0600
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90000007dd0
RBP: ffff8880b9a2a540 R08: 0000000000000001 R09: ffffc90000007dd0
R10: ffffed10173454a8 R11: 0000000000000001 R12: ffff8880b9a2a548
R13: ffff8880b9a2a550 R14: ffff8880b9a2a540 R15: 0000000000000001
FS:  00007f9157dcb700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc046e72b8 CR3: 000000007a174000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000003b DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
 atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:542 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
 do_raw_spin_lock+0x120/0x2a0 kernel/locking/spinlock_debug.c:115
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x23e/0xe40 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:166 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:200
Code: 48 89 ef 5d e9 91 60 4b 00 5d be 03 00 00 00 e9 86 3e 80 02 66 0f 1f 44 00 00 48 8b be a8 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 <65> 8b 05 29 b8 87 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b
RSP: 0018:ffffc9000f427810 EFLAGS: 00000216
RAX: 00000000000061d2 RBX: 0000000000000000 RCX: ffffc90003c79000
RDX: 0000000000040000 RSI: ffffffff8160c3e5 RDI: 0000000000000007
RBP: ffffc9000f4279b8 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000200 R11: 0000000000000001 R12: 0000000000000001
R13: ffffffff90f34d60 R14: 0000000000000200 R15: ffffffff8c82cbb8
 console_emit_next_record.constprop.0+0x4fb/0x840 arch/x86/include/asm/irqflags.h:45
 console_flush_all kernel/printk/printk.c:2794 [inline]
 console_unlock+0x37a/0x5a0 kernel/printk/printk.c:2861
 vprintk_emit+0x1b9/0x5f0 kernel/printk/printk.c:2271
 vprintk+0x80/0x90 kernel/printk/printk_safe.c:50
 _printk+0xba/0xed kernel/printk/printk.c:2292
 mac80211_hwsim_netlink_notify drivers/net/wireless/mac80211_hwsim.c:4771 [inline]
 mac80211_hwsim_netlink_notify.cold+0x11/0x49 drivers/net/wireless/mac80211_hwsim.c:4759
 notifier_call_chain+0xb5/0x200 kernel/notifier.c:87
 blocking_notifier_call_chain kernel/notifier.c:382 [inline]
 blocking_notifier_call_chain+0x67/0x90 kernel/notifier.c:370
 netlink_release+0xcb6/0x1db0 net/netlink/af_netlink.c:790
 __sock_release+0xcd/0x280 net/socket.c:650
 sock_close+0x18/0x20 net/socket.c:1365
 __fput+0x277/0x9d0 fs/file_table.c:317
 task_work_run+0xdd/0x1a0 kernel/task_work.c:177
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:169 [inline]
 exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f9156c3be4b
Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44
RSP: 002b:00007f9157dca090 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 000000000000003c RCX: 00007f9156c3be4b
RDX: 00007f9157dc9f51 RSI: 00007f9156d091f2 RDI: 0000000000000004
RBP: 0000000000000004 R08: 0000000000000000 R09: 00007f9157dc9f50
R10: 0000000000000000 R11: 0000000000000293 R12: 00000000ffffffea
R13: 0000000000000036 R14: 0000000020000300 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 10497 jiffies! g346957 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27984 pid:   16 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5184 [inline]
 __schedule+0xa09/0x4f10 kernel/sched/core.c:6496
 schedule+0xd2/0x1f0 kernel/sched/core.c:6568
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1935
 rcu_gp_fqs_loop+0x190/0x910 kernel/rcu/tree.c:1657
 rcu_gp_kthread+0x234/0x360 kernel/rcu/tree.c:1854
 kthread+0x2e9/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
NMI backtrace for cpu 1
CPU: 1 PID: 8374 Comm: kworker/u4:3 Not tainted 5.19.0-rc4-next-20220628-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
Workqueue: events_unbound toggle_allocation_gate
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_check_gp_kthread_starvation.cold+0x1fb/0x200 kernel/rcu/tree_stall.h:514
 print_other_cpu_stall kernel/rcu/tree_stall.h:619 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:762 [inline]
 rcu_pending kernel/rcu/tree.c:3655 [inline]
 rcu_sched_clock_irq+0x2309/0x23a0 kernel/rcu/tree.c:2342
 update_process_times+0x11a/0x1a0 kernel/time/timer.c:1839
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:243
 tick_sched_timer+0xee/0x120 kernel/time/tick-sched.c:1480
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x1c0/0xe40 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:csd_lock_wait kernel/smp.c:414 [inline]
RIP: 0010:smp_call_function_many_cond+0x499/0x10f0 kernel/smp.c:988
Code: 01 89 ee e8 d9 91 0a 00 85 ed 74 47 48 8b 04 24 49 89 c4 83 e0 07 49 c1 ec 03 48 89 c5 4d 01 fc 83 c5 03 e8 e9 94 0a 00 f3 90 <41> 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 f6 09 00 00 8b 43 08 31
RSP: 0000:ffffc9000fcbf950 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8880b9a42540 RCX: 0000000000000000
RDX: ffff888020798000 RSI: ffffffff81702227 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffffed10173484a9
R13: 0000000000000000 R14: 0000000000000001 R15: dffffc0000000000
 on_each_cpu_cond_mask+0x56/0xa0 kernel/smp.c:1154
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:1231 [inline]
 text_poke_bp_batch+0x233/0x6c0 arch/x86/kernel/alternative.c:1419
 text_poke_flush arch/x86/kernel/alternative.c:1589 [inline]
 text_poke_flush arch/x86/kernel/alternative.c:1586 [inline]
 text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1596
 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
 jump_label_update+0x32f/0x410 kernel/jump_label.c:830
 static_key_enable_cpuslocked+0x1b1/0x260 kernel/jump_label.c:177
 static_key_enable+0x16/0x20 kernel/jump_label.c:190
 toggle_allocation_gate mm/kfence/core.c:811 [inline]
 toggle_allocation_gate+0x100/0x390 mm/kfence/core.c:803
 process_one_work+0x991/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e9/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
 </TASK>

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-linux-next-kasan-gce-root 2022/07/21 23:59 linux-next cb71b93c2dc3 5e6028b9 .config log report info INFO: rcu detected stall in netlink_release
* Struck through repros no longer work on HEAD.