------------[ cut here ]------------
WARNING: CPU: 0 PID: 4294 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 4294 Comm: kworker/0:22 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: rcu_gp process_srcu
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 6d f7 d8 ff 85 db 48 c7 c0 f2 ff ff ff 49 0f 44 c6 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 f0 f3 d8 ff <0f> 0b e9 1c ff ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c ea fe
RSP: 0018:ffffc90000007c10 EFLAGS: 00010006
RAX: ffffffff819ed660 RBX: 0000000000000000 RCX: ffff8880298ad940
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed1005315b29
R10: ffffed1005315b29 R11: 1ffff11005315b28 R12: ffff8880298af0c8
R13: 00007ffffffff000 R14: ffffc90000007c88 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7752d352f8 CR3: 000000000be8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
bpf_probe_read_user_common kernel/trace/bpf_trace.c:157 [inline]
____bpf_probe_read_compat kernel/trace/bpf_trace.c:281 [inline]
bpf_probe_read_compat+0xdd/0x170 kernel/trace/bpf_trace.c:277
bpf_prog_f3c4d654356a1293+0x34/0x4a4
bpf_dispatcher_nop_func include/linux/bpf.h:888 [inline]
__bpf_prog_run include/linux/filter.h:628 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1878 [inline]
bpf_trace_run2+0x15b/0x2d0 kernel/trace/bpf_trace.c:1915
__traceiter_tlb_flush+0x69/0xb0 include/trace/events/tlb.h:38
trace_tlb_flush+0xe6/0x110 include/trace/events/tlb.h:38
switch_mm_irqs_off+0x6e3/0x9a0 arch/x86/mm/tlb.c:-1
flush_tlb_func+0x1bc/0x510 arch/x86/mm/tlb.c:773
flush_smp_call_function_queue+0x2a9/0x760 kernel/smp.c:628
__sysvec_call_function_single+0x98/0x240 arch/x86/kernel/smp.c:248
instr_sysvec_call_function_single arch/x86/kernel/smp.c:243 [inline]
sysvec_call_function_single+0x98/0xc0 arch/x86/kernel/smp.c:243
asm_sysvec_call_function_single+0x16/0x20 arch/x86/include/asm/idtentry.h:684
RIP: 0010:srcu_readers_lock_idx kernel/rcu/srcutree.c:249 [inline]
RIP: 0010:srcu_readers_active_idx_check kernel/rcu/srcutree.c:318 [inline]
RIP: 0010:try_check_zero+0x16a/0x340 kernel/rcu/srcutree.c:698
Code: 97 69 8d 80 e1 07 80 c1 03 38 c1 7c ce 48 c7 c7 b0 97 69 8d e8 57 9c 58 00 eb c0 48 c7 44 24 08 00 00 00 00 f0 83 44 24 fc 00 ff ff ff ff 48 c7 c6 b8 95 69 8d e8 95 da 97 02 89 c5 43 0f b6
RSP: 0018:ffffc9000316fae8 EFLAGS: 00000286
RAX: 0000000000000000 RBX: ffff8880b9143a00 RCX: ffff8880298ad940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000008 R08: dffffc0000000000 R09: fffff5200062df25
R10: fffff5200062df25 R11: 1ffff9200062df24 R12: dffffc0000000000
R13: ffff8880b9143a18 R14: 1ffffffff1ad32f6 R15: ffffffff9612e810
srcu_advance_state kernel/rcu/srcutree.c:1227 [inline]
process_srcu+0x195/0xc10 kernel/rcu/srcutree.c:1325
process_one_work+0x863/0x1000 kernel/workqueue.c:2310
worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
----------------
Code disassembly (best guess):
0: 97 xchg %eax,%edi
1: 69 8d 80 e1 07 80 c1 imul $0xc13803c1,-0x7ff81e80(%rbp),%ecx
8: 03 38 c1
b: 7c ce jl 0xffffffdb
d: 48 c7 c7 b0 97 69 8d mov $0xffffffff8d6997b0,%rdi
14: e8 57 9c 58 00 call 0x589c70
19: eb c0 jmp 0xffffffdb
1b: 48 c7 44 24 08 00 00 movq $0x0,0x8(%rsp)
22: 00 00
24: f0 83 44 24 fc 00 lock addl $0x0,-0x4(%rsp)
* 2a: bf ff ff ff ff mov $0xffffffff,%edi <-- trapping instruction
2f: 48 c7 c6 b8 95 69 8d mov $0xffffffff8d6995b8,%rsi
36: e8 95 da 97 02 call 0x297dad0
3b: 89 c5 mov %eax,%ebp
3d: 43 rex.XB
3e: 0f .byte 0xf
3f: b6 .byte 0xb6