------------[ cut here ]------------
WARNING: CPU: 0 PID: 7977 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 7977 Comm: syz.0.1024 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 7d 94 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 00 91 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:ffffc90000007d38 EFLAGS: 00010006
RAX: ffffffff81a07ea0 RBX: 0000000000000008 RCX: ffff888042728000
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888042728007 R09: 1ffff110084e5000
R10: dffffc0000000000 R11: ffffed10084e5001 R12: ffff888042729788
R13: 00007ffffffff000 R14: ffffc90000007da8 R15: 0000000000000000
FS: 00007f26c94626c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffc44a0000 CR3: 00000000597ce000 CR4: 00000000003506f0
DR0: 0000200000000300 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_compat kernel/trace/bpf_trace.c:281 [inline]
bpf_probe_read_compat+0xdd/0x170 kernel/trace/bpf_trace.c:277
bpf_prog_4d571c0aa826a670+0x5b/0x51c
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+0x163/0x2e0 kernel/trace/bpf_trace.c:1915
trace_tlb_flush+0xe6/0x110 include/trace/events/tlb.h:38
flush_tlb_func+0x4c7/0x5b0 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_start+0x63/0x740 arch/x86/kernel/unwind_orc.c:635
Code: 4d 89 f7 49 c1 ef 03 41 80 3c 17 00 74 12 4c 89 f7 e8 c1 f8 88 00 48 ba 00 00 00 00 00 fc ff df 4d 89 2e 80 3d b1 83 ad 0a 01 <75> 2e 65 48 8b 05 23 54 cd 7e 49 39 c5 74 64 49 8d 6d 34 48 89 e8
RSP: 0000:ffffc90002e1f5e8 EFLAGS: 00000246
RAX: ffffc90002e1f648 RBX: ffffc90002e1f648 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffc90002e1f6a8
RBP: ffffc90002e1f6d0 R08: ffffc90002e1f6a7 R09: ffffc90002e1f648
R10: dffffc0000000000 R11: fffff520005c3ed5 R12: 0000000000000000
R13: ffff888042728000 R14: ffffc90002e1f670 R15: 1ffff920005c3ece
unwind_start arch/x86/include/asm/unwind.h:60 [inline]
arch_stack_walk+0xda/0x140 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
save_stack+0x121/0x230 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+0x1bbd/0x1ca0 mm/page_alloc.c:4192
__alloc_pages+0x1ee/0x480 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+0x23be/0x4410 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: 0033:0x7f26cb1b529f
Code: b0 00 00 00 0f 29 bc 24 c0 00 00 00 64 48 8b 04 25 28 00 00 00 48 89 44 24 18 31 c0 48 8d 84 24 e0 00 00 00 45 31 c0 48 89 e1 <48> 89 44 24 08 48 8d 44 24 20 c7 04 24 18 00 00 00 c7 44 24 04 30
RSP: 002b:00007f26c9461ff0 EFLAGS: 00010246
RAX: 00007f26c94620d0 RBX: 0000000000020000 RCX: 00007f26c9461ff0
RDX: 00007f26cb2b4fef RSI: 0000000000000023 RDI: 00007f26c94620d0
RBP: 00007f26c9443000 R08: 0000000000000000 R09: 00007ffc1ac55d07
R10: 0000000000000008 R11: 0000000000000202 R12: 00007f26c94620d0
R13: 000000000000004d R14: 00007ffc1ac55c20 R15: 00007ffc1ac55d08
----------------
Code disassembly (best guess):
0: 4d 89 f7 mov %r14,%r15
3: 49 c1 ef 03 shr $0x3,%r15
7: 41 80 3c 17 00 cmpb $0x0,(%r15,%rdx,1)
c: 74 12 je 0x20
e: 4c 89 f7 mov %r14,%rdi
11: e8 c1 f8 88 00 call 0x88f8d7
16: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx
1d: fc ff df
20: 4d 89 2e mov %r13,(%r14)
23: 80 3d b1 83 ad 0a 01 cmpb $0x1,0xaad83b1(%rip) # 0xaad83db
* 2a: 75 2e jne 0x5a <-- trapping instruction
2c: 65 48 8b 05 23 54 cd mov %gs:0x7ecd5423(%rip),%rax # 0x7ecd5457
33: 7e
34: 49 39 c5 cmp %rax,%r13
37: 74 64 je 0x9d
39: 49 8d 6d 34 lea 0x34(%r13),%rbp
3d: 48 89 e8 mov %rbp,%rax