rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (10514 ticks this GP) idle=40e4/1/0x4000000000000000 softirq=22015/22018 fqs=4507
rcu: hardirqs softirqs csw/system
rcu: number: 1111562 0 0
rcu: cputime: 15813 36676 65 ==> 52490(ms)
rcu: (t=10500 jiffies g=28613 q=3361 ncpus=2)
CPU: 0 PID: 7945 Comm: syz.3.766 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:get_random_u32+0x544/0x930 drivers/char/random.c:522
Code: d4 fc 4d 85 f6 75 16 e8 4a 5e d4 fc eb 15 e8 43 5e d4 fc e8 2e 11 d9 05 4d 85 f6 74 ea e8 34 5e d4 fc fb 8b 84 24 00 01 00 00 <43> c6 44 2f 18 f8 48 c7 44 24 40 0e 36 e0 45 4b c7 04 2f 00 00 00
RSP: 0018:ffffc90000007920 EFLAGS: 00000246
RAX: 000000007a81d4cb RBX: 0000000000000000 RCX: ffff888031ab5a00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007a88 R08: ffffffff911e758f R09: 1ffffffff223ceb1
R10: dffffc0000000000 R11: fffffbfff223ceb2 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000200 R15: 1ffff92000000f2c
FS: 00007f73758226c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000005867c000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
get_random_u32_below include/linux/random.h:86 [inline]
get_random_u32_inclusive include/linux/random.h:115 [inline]
rfc3315_s14_backoff_update+0x14/0xc0 net/ipv6/addrconf.c:115
addrconf_rs_timer+0x3b6/0x640 net/ipv6/addrconf.c:4035
call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x570/0x810 kernel/time/timer.c:2023
run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
handle_softirqs+0x27d/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:preempt_schedule_irq+0xba/0x150 kernel/sched/core.c:7010
Code: 00 00 43 c6 44 37 04 f8 74 0b 0f 0b 48 f7 03 08 00 00 00 74 6f bf 01 00 00 00 e8 51 81 c8 f6 e8 8c 6d f9 f6 fb bf 01 00 00 00 31 b4 ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0018:ffffc90018a1f340 EFLAGS: 00000286
RAX: 5f848d870df0a500 RBX: 0000000000000000 RCX: 5f848d870df0a500
RDX: dffffc0000000000 RSI: ffffffff8acacb60 RDI: 0000000000000001
RBP: ffffc90018a1f3e0 R08: ffffffff8e8c6e6f R09: 1ffffffff1d18dcd
R10: dffffc0000000000 R11: fffffbfff1d18dce R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92003143e68
irqentry_exit+0x67/0x70 kernel/entry/common.c:438
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:in_gate_area_no_mm+0x5/0x50 arch/x86/entry/vsyscall/vsyscall_64.c:331
Code: fe e8 9f 4b 86 00 45 31 f6 4c 39 fb 41 0f 92 c6 44 89 f0 5b 41 5e 41 5f 5d c3 66 2e 0f 1f 84 00 00 00 00 00 90 66 0f 1f 00 55 <53> 48 89 fb e8 62 49 86 00 8b 2d 0c 54 a8 0b bf 02 00 00 00 89 ee
RSP: 0018:ffffc90018a1f4a0 EFLAGS: 00000246
RAX: ffffffff813b2200 RBX: 00007f737499de59 RCX: 0000000000000001
RDX: ffff888031ab5a00 RSI: 0000000000000001 RDI: 00007f737499de59
RBP: 0000000000000001 R08: ffff888031ab5a00 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000002 R12: ffffffff8aa000d0
R13: 0000000000001000 R14: dffffc0000000000 R15: 1ffff92003143eaa
is_kernel_text include/linux/kallsyms.h:31 [inline]
core_kernel_text kernel/extable.c:68 [inline]
kernel_text_address+0x2d/0xd0 kernel/extable.c:99
__kernel_text_address+0xd/0x30 kernel/extable.c:79
unwind_get_return_address+0x5d/0xc0 arch/x86/kernel/unwind_orc.c:369
arch_stack_walk+0x11d/0x190 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
____kasan_kmalloc mm/kasan/common.c:375 [inline]
__kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:384
kmalloc_node include/linux/slab.h:616 [inline]
kzalloc_node include/linux/slab.h:732 [inline]
__get_vm_area_node+0x125/0x370 mm/vmalloc.c:2613
__vmalloc_node_range+0x36f/0x1320 mm/vmalloc.c:3299
__vmalloc_node mm/vmalloc.c:3404 [inline]
__vmalloc+0x7a/0x90 mm/vmalloc.c:3418
bpf_prog_alloc_no_stats+0x46/0x430 kernel/bpf/core.c:98
bpf_prog_alloc+0x3d/0x1a0 kernel/bpf/core.c:136
bpf_prog_load+0x6b2/0x1610 kernel/bpf/syscall.c:2684
__sys_bpf+0x5ba/0x890 kernel/bpf/syscall.c:5477
__do_sys_bpf kernel/bpf/syscall.c:5581 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5579 [inline]
__x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5579
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f737499de59
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:00007f7375822028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f7374c25fa0 RCX: 00007f737499de59
RDX: 0000000000000070 RSI: 0000200000000440 RDI: 0000000000000005
RBP: 00007f7374a33e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7374c26038 R14: 00007f7374c25fa0 R15: 00007ffec9024c08