------------[ cut here ]------------
WARNING: CPU: 0 PID: 28828 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 28828 Comm: syz.1.11966 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: ffffffff81a08ea0 RBX: 0000000000000008 RCX: ffff888070ddbb80
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888070ddbb87 R09: 1ffff1100e1bb770
R10: dffffc0000000000 R11: ffffed100e1bb771 R12: ffff888070ddd308
R13: 00007ffffffff000 R14: ffffc90000007da8 R15: 0000000000000000
FS: 00007fbf1226e6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 0000000075734000 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_compat kernel/trace/bpf_trace.c:281 [inline]
bpf_probe_read_compat+0xdd/0x170 kernel/trace/bpf_trace.c:277
bpf_prog_1ccb8ba97563bf77+0x59/0x48c
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_next_frame+0x56/0x1d90 arch/x86/kernel/unwind_orc.c:424
Code: 24 20 42 80 3c 30 00 74 08 48 89 ef e8 03 17 89 00 4c 8b 63 48 4c 8d 7b 38 4c 89 f8 48 c1 e8 03 48 89 44 24 40 42 80 3c 30 00 <74> 08 4c 89 ff e8 e0 16 89 00 4c 89 7c 24 38 4c 8b 6b 38 49 89 df
RSP: 0000:ffffc9000138f528 EFLAGS: 00000246
RAX: 1ffff92000271ed0 RBX: ffffc9000138f648 RCX: 0000000080000001
RDX: ffffc9000138f6d8 RSI: dffffc0000000000 RDI: ffffc9000138f648
RBP: ffffc9000138f690 R08: ffffc9000138f6a7 R09: ffffc9000138f698
R10: dffffc0000000000 R11: fffff52000271ed5 R12: ffffffff812cd71a
R13: ffffc9000138f658 R14: dffffc0000000000 R15: ffffc9000138f680
__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+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: 0033:0x7fbf13fc129f
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:00007fbf1226dff0 EFLAGS: 00010246
RAX: 00007fbf1226e0d0 RBX: 0000000000020000 RCX: 00007fbf1226dff0
RDX: 00007fbf140c0fef RSI: 0000000000000023 RDI: 00007fbf1226e0d0
RBP: 00007fbf1224f000 R08: 0000000000000000 R09: 00007fffbc2c4997
R10: 0000000000000008 R11: 0000000000000202 R12: 00007fbf1226e0d0
R13: 000000000000000b R14: 00007fffbc2c48b0 R15: 00007fffbc2c4998
----------------
Code disassembly (best guess):
0: 24 20 and $0x20,%al
2: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1)
7: 74 08 je 0x11
9: 48 89 ef mov %rbp,%rdi
c: e8 03 17 89 00 call 0x891714
11: 4c 8b 63 48 mov 0x48(%rbx),%r12
15: 4c 8d 7b 38 lea 0x38(%rbx),%r15
19: 4c 89 f8 mov %r15,%rax
1c: 48 c1 e8 03 shr $0x3,%rax
20: 48 89 44 24 40 mov %rax,0x40(%rsp)
25: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1)
* 2a: 74 08 je 0x34 <-- trapping instruction
2c: 4c 89 ff mov %r15,%rdi
2f: e8 e0 16 89 00 call 0x891714
34: 4c 89 7c 24 38 mov %r15,0x38(%rsp)
39: 4c 8b 6b 38 mov 0x38(%rbx),%r13
3d: 49 89 df mov %rbx,%r15