------------[ cut here ]------------
WARNING: CPU: 0 PID: 8202 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 0 PID: 8202 Comm: syz.0.1014 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:ffffc90000007d30 EFLAGS: 00010006
RAX: ffffffff819ed760 RBX: 0000000000000008 RCX: ffff888074f48000
RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed100e9e9001
R10: ffffed100e9e9001 R11: 1ffff1100e9e9000 R12: ffff888074f49788
R13: 00007ffffffff000 R14: ffffc90000007da8 R15: 0000000020000000
FS: 00007fde95cac6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fde979dbdb0 CR3: 000000006340e000 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_2c2e2930f3e7254b+0x5e/0x660
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:PageTail include/linux/page-flags.h:207 [inline]
RIP: 0010:PageCompound include/linux/page-flags.h:212 [inline]
RIP: 0010:PageTransCompound include/linux/page-flags.h:643 [inline]
RIP: 0010:page_add_file_rmap+0x1c7/0x940 mm/rmap.c:1236
Code: 3c 28 00 74 08 48 89 df e8 96 1c 0c 00 4c 8b 33 4c 89 f6 48 81 e6 00 00 01 00 31 ff e8 52 b8 c7 ff 49 81 e6 00 00 01 00 75 3e <4c> 8d 73 08 4c 89 f0 48 c1 e8 03 80 3c 28 00 74 08 4c 89 f7 e8 60
RSP: 0000:ffffc90003cefaa0 EFLAGS: 00000246
RAX: ffffffff81b016ae RBX: ffffea0001ced3c0 RCX: ffff888074f48000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: dffffc0000000000 R09: fffff9400039da79
R10: fffff9400039da79 R11: 1ffffd400039da78 R12: ffffc90003cefd80
R13: 0000000073b4f025 R14: 0000000000000000 R15: dffffc0000000000
do_set_pte+0x3c9/0x530 mm/memory.c:4069
filemap_map_pages+0xe7e/0x1390 mm/filemap.c:3344
do_fault_around mm/memory.c:4243 [inline]
do_read_fault mm/memory.c:4258 [inline]
do_fault mm/memory.c:4392 [inline]
handle_pte_fault mm/memory.c:4650 [inline]
__handle_mm_fault mm/memory.c:4785 [inline]
handle_mm_fault+0x2580/0x43c0 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: 0033:0x7fde979dbdb0
Code: Unable to access opcode bytes at RIP 0x7fde979dbd86.
RSP: 002b:00007fde95cac118 EFLAGS: 00010246
RAX: fffffffffffffeb8 RBX: 00007fde95cac6c0 RCX: 00007fde97a79409
RDX: 00007fde95cacd78 RSI: 0000000000000058 RDI: 00007fde95cac6c0
RBP: 0000000000000000 R08: 00007fde95cac6c0 R09: 00007ffe1c2433d7
R10: 0000000000000008 R11: 0000000000000202 R12: ffffffffffffffa8
R13: 000000000000000b R14: 00007ffe1c2432f0 R15: 00007ffe1c2433d8
----------------
Code disassembly (best guess):
0: 3c 28 cmp $0x28,%al
2: 00 74 08 48 add %dh,0x48(%rax,%rcx,1)
6: 89 df mov %ebx,%edi
8: e8 96 1c 0c 00 call 0xc1ca3
d: 4c 8b 33 mov (%rbx),%r14
10: 4c 89 f6 mov %r14,%rsi
13: 48 81 e6 00 00 01 00 and $0x10000,%rsi
1a: 31 ff xor %edi,%edi
1c: e8 52 b8 c7 ff call 0xffc7b873
21: 49 81 e6 00 00 01 00 and $0x10000,%r14
28: 75 3e jne 0x68
* 2a: 4c 8d 73 08 lea 0x8(%rbx),%r14 <-- trapping instruction
2e: 4c 89 f0 mov %r14,%rax
31: 48 c1 e8 03 shr $0x3,%rax
35: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1)
39: 74 08 je 0x43
3b: 4c 89 f7 mov %r14,%rdi
3e: e8 .byte 0xe8
3f: 60 (bad)