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WARNING: kernel/rcu/tree_stall.h:1049 at rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1049, CPU#1: syz.0.11/5864
Modules linked in:
CPU: 1 UID: 0 PID: 5864 Comm: syz.0.11 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1049
Code: ff ff 48 c7 c7 20 35 48 9a be 04 00 00 00 e8 83 17 87 00 4c 89 f7 b8 01 00 00 00 87 05 05 ca 9c 18 85 c0 0f 85 17 ff ff ff 90 <0f> 0b 90 48 81 ff 80 28 96 8e 74 47 48 c7 c0 e0 5a 30 90 48 c1 e8
RSP: 0018:ffffc90000a08d98 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000246 RCX: ffffffff81ab6b0d
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8e962880
RBP: ffffc90000a08f18 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff34906a4 R12: 0000000000002904
R13: dffffc0000000000 R14: ffffffff8e962880 R15: dffffc0000000000
FS: 00007f1a498f06c0(0000) GS:ffff888125396000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c24ec9e CR3: 000000003640e000 CR4: 00000000003526f0
Call Trace:
rcu_core+0x3fe/0x1070 kernel/rcu/tree.c:2864
handle_softirqs+0x22a/0x840 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1061
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:preempt_schedule_irq+0x48/0xa0 kernel/sched/core.c:7513
Code: 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 53 bf 01 00 00 00 e8 53 08 ea f5 e8 0e 25 24 f6 fb bf 01 00 00 00 53 a2 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 d4 26 24 f6 bf 01
RSP: 0018:ffffc9000541eff8 EFLAGS: 00000202
RAX: 000000000091b8b3 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8dfa4b68 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffffffff903027f7 R09: 1ffffffff20604fe
R10: dffffc0000000000 R11: fffffbfff20604ff R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x8b0 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:rcu_read_lock include/linux/rcupdate.h:839 [inline]
RIP: 0010:class_rcu_constructor include/linux/rcupdate.h:1181 [inline]
RIP: 0010:unwind_next_frame+0xc7/0x2550 arch/x86/kernel/unwind_orc.c:495
Code: 34 00 4c 8d 3d 00 00 00 00 48 c7 c7 e0 cc 95 8e 31 f6 31 d2 b9 02 00 00 00 45 31 c0 45 31 c9 41 57 e8 7d ce 2a 00 48 83 c4 08 94 b8 31 0a 85 c0 74 3a e8 5b f7 33 00 84 c0 75 31 e8 82 b8 31
RSP: 0018:ffffc9000541f118 EFLAGS: 00000286
RAX: c02c0a6926e95e00 RBX: ffffffff81770cd7 RCX: 0000000000000046
RDX: 000000005a44979c RSI: ffffffff8e217b84 RDI: ffffffff8c28c060
RBP: dffffc0000000000 R08: ffffffff8176e256 R09: ffffffff8e95cce0
R10: ffffc9000541f248 R11: fffff52000a83e55 R12: ffffc9000541f280
R13: 1ffff92000a83e49 R14: ffffc9000541f248 R15: ffffffff8176e256
__unwind_start+0x5b8/0x760 arch/x86/kernel/unwind_orc.c:787
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xe3/0x150 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:165
__reset_page_owner+0x71/0x1f0 mm/page_owner.c:320
reset_page_owner include/linux/page_owner.h:25 [inline]
__free_pages_prepare mm/page_alloc.c:1402 [inline]
__free_frozen_pages+0xbc7/0xd30 mm/page_alloc.c:2943
__kasan_populate_vmalloc_do mm/kasan/shadow.c:393 [inline]
__kasan_populate_vmalloc+0x1b2/0x1d0 mm/kasan/shadow.c:424
kasan_populate_vmalloc include/linux/kasan.h:580 [inline]
alloc_vmap_area+0xd47/0x1480 mm/vmalloc.c:2123
__get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3226
__vmalloc_node_range_noprof+0x36a/0x1750 mm/vmalloc.c:4024
__vmalloc_node_noprof mm/vmalloc.c:4124 [inline]
__vmalloc_noprof+0xd2/0x120 mm/vmalloc.c:4140
bpf_prog_alloc_no_stats+0x4a/0x4f0 kernel/bpf/core.c:106
bpf_prog_alloc+0x3c/0x1a0 kernel/bpf/core.c:155
bpf_prog_load+0x792/0x1b90 kernel/bpf/syscall.c:3074
__sys_bpf+0xd0b/0xd90 kernel/bpf/syscall.c:6394
__do_sys_bpf kernel/bpf/syscall.c:6513 [inline]
__se_sys_bpf kernel/bpf/syscall.c:6510 [inline]
__x64_sys_bpf+0xba/0xd0 kernel/bpf/syscall.c:6510
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1a4899ce59
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:00007f1a498f0028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f1a48c15fa0 RCX: 00007f1a4899ce59
RDX: 0000000000000094 RSI: 0000200000000400 RDI: 0000000000000005
RBP: 00007f1a48a32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1a48c16038 R14: 00007f1a48c15fa0 R15: 00007ffc28a01b78
----------------
Code disassembly (best guess):
0: 49 be 00 00 00 00 00 movabs $0xdffffc0000000000,%r14
7: fc ff df
a: eb 09 jmp 0x15
c: 48 f7 03 10 00 00 00 testq $0x10,(%rbx)
13: 74 53 je 0x68
15: bf 01 00 00 00 mov $0x1,%edi
1a: e8 53 08 ea f5 call 0xf5ea0872
1f: e8 0e 25 24 f6 call 0xf6242532
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 53 a2 ff ff call 0xffffa282 <-- trapping instruction
2f: 9c pushf
30: 58 pop %rax
31: fa cli
32: a9 00 02 00 00 test $0x200,%eax
37: 74 05 je 0x3e
39: e8 d4 26 24 f6 call 0xf6242712
3e: bf .byte 0xbf
3f: 01 .byte 0x1