------------[ cut here ]------------
WARNING: CPU: 0 PID: 7338 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 7338 Comm: syz.9.731 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 3d 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 c0 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: 0000:ffffc90000007d40 EFLAGS: 00010006
RAX: ffffffff819ed760 RBX: 0000000000000008 RCX: ffff88807348bb80
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88807348bb80 R09: 000000000000000c
R10: 000000000000000c R11: 0000000000010000 R12: ffff88807348d308
R13: dffffc0000000000 R14: ffffc90000007da8 R15: 0000000000000000
FS: 00007f7391fc56c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7391fc4f98 CR3: 00000000621e5000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
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/0x8b0
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
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:unwind_next_frame+0xbc/0x1d90 arch/x86/kernel/unwind_orc.c:436
Code: ac 24 80 00 00 00 4c 89 64 24 58 4c 89 7c 24 48 bf 01 00 00 00 e8 44 f7 1c 00 4c 8d 7b 50 4c 89 f8 48 c1 e8 03 48 89 44 24 30 <42> 80 3c 30 00 74 08 4c 89 ff e8 05 ba 87 00 4c 89 7c 24 28 4d 8b
RSP: 0000:ffffc9000356f528 EFLAGS: 00000a02
RAX: 1ffff920006aded3 RBX: ffffc9000356f648 RCX: ffffffff960c2f00
RDX: ffffc9000356f6d8 RSI: dffffc0000000000 RDI: ffffffff8134790c
RBP: ffffc9000356f690 R08: dffffc0000000001 R09: ffffc9000356f648
R10: fffff520006aded5 R11: 1ffff920006adec9 R12: ffffffff813497fe
R13: ffffc9000356f5e8 R14: dffffc0000000000 R15: ffffc9000356f698
__unwind_start+0x5bb/0x740 arch/x86/kernel/unwind_orc.c:704
unwind_start arch/x86/include/asm/unwind.h:60 [inline]
arch_stack_walk+0xda/0x140 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x98/0xe0 kernel/stacktrace.c:122
save_stack+0xf3/0x1e0 mm/page_owner.c:119
__set_page_owner+0x41/0x2d0 mm/page_owner.c:181
prep_new_page mm/page_alloc.c:2426 [inline]
get_page_from_freelist+0x1b77/0x1c60 mm/page_alloc.c:4192
__alloc_pages+0x1e1/0x470 mm/page_alloc.c:5487
alloc_pages_vma+0x393/0x7c0 mm/mempolicy.c:2146
do_anonymous_page mm/memory.c:3838 [inline]
handle_pte_fault mm/memory.c:4648 [inline]
__handle_mm_fault mm/memory.c:4785 [inline]
handle_mm_fault+0x2382/0x43c0 mm/memory.c:4883
do_user_addr_fault+0x489/0xc80 arch/x86/mm/fault.c:1357
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: 0033:0x7f7393c1d1ee
Code: f6 31 c0 e8 74 f2 13 00 48 81 c4 90 00 00 00 48 98 5b c3 66 0f 1f 84 00 00 00 00 00 41 54 55 53 48 89 fb 48 81 ec d0 00 00 00 <48> 89 74 24 28 48 89 54 24 30 48 89 4c 24 38 4c 89 44 24 40 4c 89
RSP: 002b:00007f7391fc4f70 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 00007f7393de2167 RCX: 00007f7393de343f
RDX: 000000000001030a RSI: 0000000000000000 RDI: 00007f7393de2167
RBP: 00007f7393fa4fa0 R08: 00000000000000cb R09: 0009621338a9b924
R10: 00000069d4a54231 R11: 00000000000099e8 R12: 0000000000000001
R13: 00007f7393fa5038 R14: 00007f7393fa4fa0 R15: 00007ffcc0153598
----------------
Code disassembly (best guess):
0: ac lods %ds:(%rsi),%al
1: 24 80 and $0x80,%al
3: 00 00 add %al,(%rax)
5: 00 4c 89 64 add %cl,0x64(%rcx,%rcx,4)
9: 24 58 and $0x58,%al
b: 4c 89 7c 24 48 mov %r15,0x48(%rsp)
10: bf 01 00 00 00 mov $0x1,%edi
15: e8 44 f7 1c 00 call 0x1cf75e
1a: 4c 8d 7b 50 lea 0x50(%rbx),%r15
1e: 4c 89 f8 mov %r15,%rax
21: 48 c1 e8 03 shr $0x3,%rax
25: 48 89 44 24 30 mov %rax,0x30(%rsp)
* 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 4c 89 ff mov %r15,%rdi
34: e8 05 ba 87 00 call 0x87ba3e
39: 4c 89 7c 24 28 mov %r15,0x28(%rsp)
3e: 4d rex.WRB
3f: 8b .byte 0x8b