rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-....: (1 GPs behind) idle=66b/1/0x4000000000000000 softirq=51380/51381 fqs=2100
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P16675/1:b..l
(detected by 1, t=10505 jiffies, g=72989, q=1392)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 16682 Comm: syz.8.4201 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:check_kcov_mode kernel/kcov.c:172 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:227 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x1b/0x80 kernel/kcov.c:279
Code: 44 02 20 48 ff c1 48 89 0a c3 0f 1f 44 00 00 48 8b 04 24 65 48 8b 0d 44 37 89 7e 65 8b 15 45 37 89 7e 81 e2 00 01 ff 00 74 11 <81> fa 00 01 00 00 75 5b 83 b9 34 16 00 00 00 74 52 8b 91 10 16 00
RSP: 0018:ffffc900000078e0 EFLAGS: 00000006
RAX: ffffffff817f6488 RBX: 0000000000000001 RCX: ffff8880270e8000
RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 0000000000000000 R08: ffffffff8d89f82f R09: 1ffffffff1b13f05
R10: dffffc0000000000 R11: fffffbfff1b13f06 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f1f47e926c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000d9000 CR3: 0000000071ad2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
variable_test_bit arch/x86/include/asm/bitops.h:214 [inline]
test_bit include/asm-generic/bitops/instrumented-non-atomic.h:135 [inline]
cpumask_test_cpu include/linux/cpumask.h:344 [inline]
cpu_online include/linux/cpumask.h:895 [inline]
trace_irq_disable include/trace/events/preemptirq.h:36 [inline]
trace_hardirqs_off_finish+0xb8/0x1f0 kernel/trace/trace_preemptirq.c:67
irqentry_enter+0x33/0x50 kernel/entry/common.c:384
sysvec_irq_work+0xa/0xc0 arch/x86/kernel/irq_work.c:17
asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:rcu_read_unlock_special+0x7f/0x4a0 kernel/rcu/tree_plugin.h:674
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 d2 df 9c 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc900000079e0 EFLAGS: 00000206
RAX: 7a89adb641355600 RBX: 1ffff92000000f40 RCX: 7a89adb641355600
RDX: dffffc0000000000 RSI: ffffffff8a2b3100 RDI: ffffffff8a7a0700
RBP: ffffc90000007ac0 R08: ffffffff901d61bf R09: 1ffffffff203ac37
R10: dffffc0000000000 R11: fffffbfff203ac38 R12: ffffffff8c323800
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
__rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
rcu_read_unlock include/linux/rcupdate.h:772 [inline]
hsr_announce+0x29a/0x310 net/hsr/hsr_device.c:410
call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
expire_timers kernel/time/timer.c:1699 [inline]
__run_timers+0x53e/0x800 kernel/time/timer.c:1970
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
handle_softirqs+0x339/0x830 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__schedule+0x11ff/0x43c0 kernel/sched/core.c:6403
Code: 48 8d 94 24 60 01 00 00 e8 fe 97 8f f7 48 8b 7c 24 30 48 89 de e8 41 5d 3b f7 48 89 c7 e8 59 3f 8e f7 48 8b 84 24 08 01 00 00 <66> 42 c7 44 28 08 f8 f8 48 c7 84 24 20 01 00 00 0e 36 e0 45 4a c7
RSP: 0018:ffffc900030bf0e0 EFLAGS: 00000282
RAX: 1ffff92000617e40 RBX: ffff88807e2d1dc0 RCX: 7a89adb641355600
RDX: dffffc0000000000 RSI: ffffffff8a2b3100 RDI: ffff8880270e9610
RBP: ffffc900030bf2b0 R08: ffff8880b903b30b R09: 1ffff11017207661
R10: dffffc0000000000 R11: ffffed1017207662 R12: ffff8880270e8518
R13: dffffc0000000000 R14: 1ffff11004e1d0a3 R15: ffff8880270e8510
preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:6571
preempt_schedule+0xbc/0xd0 kernel/sched/core.c:6596
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
unwind_next_frame+0x12ac/0x1d90 arch/x86/kernel/unwind_orc.c:616
arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:434 [inline]
__kasan_slab_alloc+0x9c/0xd0 mm/kasan/common.c:467
kasan_slab_alloc include/linux/kasan.h:254 [inline]
slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519
slab_alloc_node mm/slub.c:3225 [inline]
kmem_cache_alloc_node+0x12d/0x2d0 mm/slub.c:3261
preload_this_cpu_lock mm/vmalloc.c:1505 [inline]
alloc_vmap_area+0x66e/0x1a10 mm/vmalloc.c:1549
__get_vm_area_node+0x14f/0x2d0 mm/vmalloc.c:2430
__vmalloc_node_range+0xef/0x8b0 mm/vmalloc.c:3027
__vmalloc_node mm/vmalloc.c:3087 [inline]
__vmalloc+0x76/0x80 mm/vmalloc.c:3101
bpf_prog_alloc_no_stats+0x36/0x2c0 kernel/bpf/core.c:90
bpf_prog_alloc+0x1a/0x1e0 kernel/bpf/core.c:124
bpf_prog_load+0x7c6/0x1510 kernel/bpf/syscall.c:2301
__sys_bpf+0x532/0x6f0 kernel/bpf/syscall.c:4657
__do_sys_bpf kernel/bpf/syscall.c:4761 [inline]
__se_sys_bpf kernel/bpf/syscall.c:4759 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4759
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f1f49c59e59
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:00007f1f47e92028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f1f49ed3090 RCX: 00007f1f49c59e59
RDX: 0000000000000048 RSI: 000020000000e000 RDI: 0000000000000005
RBP: 00007f1f49cefd6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1f49ed3128 R14: 00007f1f49ed3090 R15: 00007fff46e9fd98
task:syz.6.4199 state:R running task stack:25360 pid:16675 ppid: 12133 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:6571
preempt_schedule+0xbc/0xd0 kernel/sched/core.c:6596
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
htab_unlock_bucket kernel/bpf/hashtab.c:204 [inline]
__htab_percpu_map_update_elem+0x59a/0x640 kernel/bpf/hashtab.c:1256
bpf_percpu_hash_update+0x113/0x1d0 kernel/bpf/hashtab.c:2243
bpf_map_update_value+0x25e/0x650 kernel/bpf/syscall.c:198
generic_map_update_batch+0x52d/0x7d0 kernel/bpf/syscall.c:1430
bpf_map_do_batch+0x466/0x600 kernel/bpf/syscall.c:-1
__sys_bpf+0x671/0x6f0 kernel/bpf/syscall.c:-1
__do_sys_bpf kernel/bpf/syscall.c:4761 [inline]
__se_sys_bpf kernel/bpf/syscall.c:4759 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4759
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f31b9cbde59
RSP: 002b:00007f31b7f17028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f31b9f36fa0 RCX: 00007f31b9cbde59
RDX: 0000000000000038 RSI: 0000200000000300 RDI: 000000000000001a
RBP: 00007f31b9d53d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f31b9f37038 R14: 00007f31b9f36fa0 R15: 00007ffdc736e638