------------[ cut here ]------------
WARNING: CPU: 0 PID: 5578 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 5578 Comm: syz.5.189 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 0d f6 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 90 f2 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: 0000:ffffc90000007d40 EFLAGS: 00010006
RAX: ffffffff819ed980 RBX: 0000000000000008 RCX: ffff888029238000
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888029238000 R09: 000000000000000c
R10: 000000000000000c R11: 0000000000010000 R12: ffff888029239788
R13: dffffc0000000000 R14: ffffc90000007da8 R15: 0000000000000000
FS: 00007f0f2844b6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0f2a17b830 CR3: 00000000609d6000 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_user kernel/trace/bpf_trace.c:166 [inline]
bpf_probe_read_user+0x26/0x70 kernel/trace/bpf_trace.c:163
bpf_prog_3b53280d0bd88656+0x5b/0xd84
bpf_dispatcher_nop_func include/linux/bpf.h:888 [inline]
__bpf_prog_run include/linux/filter.h:621 [inline]
bpf_prog_run include/linux/filter.h:635 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1878 [inline]
bpf_trace_run2+0x242/0x2d0 kernel/trace/bpf_trace.c:1915
trace_tlb_flush+0xe6/0x110 include/trace/events/tlb.h:38
flush_tlb_func+0x43f/0x510 arch/x86/mm/tlb.c:855
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:do_user_addr_fault+0x1af/0xc80 arch/x86/mm/fault.c:1256
Code: 5c 24 18 48 8b 1b 48 89 de 48 83 e6 03 31 ff e8 27 ef 42 00 48 83 e3 03 74 12 e8 3c eb 42 00 e8 17 09 49 00 fb bb 54 02 00 00 51 49 8d 9c 24 90 00 00 00 48 89 d8 48 c1 e8 03 80 3c 28 00 74
RSP: 0000:ffffc90002d5fe80 EFLAGS: 00000282
RAX: 2f8e36bc1c5cd200 RBX: 0000000000000254 RCX: 2f8e36bc1c5cd200
RDX: dffffc0000000000 RSI: ffffffff8a0b1be0 RDI: ffffffff8a59e800
RBP: dffffc0000000000 R08: dffffc0000000000 R09: fffffbfff1ad26b6
R10: fffffbfff1ad26b6 R11: 1ffffffff1ad26b5 R12: ffffc90002d5ff58
R13: ffff88807e667700 R14: 0000000000000014 R15: 00007f0f2a17b830
handle_page_fault arch/x86/mm/fault.c:1445 [inline]
exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1501
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606
RIP: 0033:0x7f0f2a17b830
Code: Unable to access opcode bytes at RIP 0x7f0f2a17b806.
RSP: 002b:00007f0f2844b118 EFLAGS: 00010246
RAX: fffffffffffffeb8 RBX: 00007f0f2844b6c0 RCX: 00007f0f2a218e89
RDX: 00007f0f2844bd78 RSI: 0000000000000058 RDI: 00007f0f2844b6c0
RBP: 0000000000000000 R08: 00007f0f2844b6c0 R09: 00007ffdc5db3e97
R10: 0000000000000008 R11: 0000000000000206 R12: ffffffffffffffa8
R13: 000000000000000b R14: 00007ffdc5db3db0 R15: 00007ffdc5db3e98
----------------
Code disassembly (best guess):
0: 5c pop %rsp
1: 24 18 and $0x18,%al
3: 48 8b 1b mov (%rbx),%rbx
6: 48 89 de mov %rbx,%rsi
9: 48 83 e6 03 and $0x3,%rsi
d: 31 ff xor %edi,%edi
f: e8 27 ef 42 00 call 0x42ef3b
14: 48 83 e3 03 and $0x3,%rbx
18: 74 12 je 0x2c
1a: e8 3c eb 42 00 call 0x42eb5b
1f: e8 17 09 49 00 call 0x49093b
24: fb sti
25: bb 54 02 00 00 mov $0x254,%ebx
* 2a: eb 51 jmp 0x7d <-- trapping instruction
2c: 49 8d 9c 24 90 00 00 lea 0x90(%r12),%rbx
33: 00
34: 48 89 d8 mov %rbx,%rax
37: 48 c1 e8 03 shr $0x3,%rax
3b: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1)
3f: 74 .byte 0x74