------------[ cut here ]------------ WARNING: CPU: 0 PID: 8213 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226 Modules linked in: CPU: 0 PID: 8213 Comm: syz.3.1301 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226 Code: 24 45 31 f6 31 ff 89 de e8 dd 99 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 60 96 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: 0018:fffffe0000016968 EFLAGS: 00010006 RAX: ffffffff81a05c40 RBX: 0000000000000008 RCX: ffff88807df70000 RDX: 0000000000110000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff8880228f7a1b R09: 1ffff1100451ef43 R10: dffffc0000000000 R11: ffffed100451ef44 R12: ffff88807df71788 R13: ffffc900011d6030 R14: fffffe00000169c8 R15: 0000000000000000 FS: 00007f73682cd6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000002a1000 CR3: 0000000079f21000 CR4: 00000000003506f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: <#DB> 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_2a130caab7282933+0x3e/0x984 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_overflow_handler+0x1c2/0x4a0 kernel/events/core.c:10297 __perf_event_overflow+0x35f/0x550 kernel/events/core.c:9515 perf_bp_event+0x276/0x320 kernel/events/core.c:10484 hw_breakpoint_handler arch/x86/kernel/hw_breakpoint.c:555 [inline] hw_breakpoint_exceptions_notify+0x14d/0x470 arch/x86/kernel/hw_breakpoint.c:586 notifier_call_chain kernel/notifier.c:83 [inline] atomic_notifier_call_chain+0x15d/0x280 kernel/notifier.c:198 notify_die+0x141/0x1a0 kernel/notifier.c:529 notify_debug+0x20/0x30 arch/x86/kernel/traps.c:872 exc_debug_kernel arch/x86/kernel/traps.c:929 [inline] exc_debug+0xcf/0x130 arch/x86/kernel/traps.c:1029 asm_exc_debug+0x1a/0x40 arch/x86/include/asm/idtentry.h:642 RIP: 0010:copy_user_generic_unrolled+0x8c/0xc0 arch/x86/lib/copy_user_64.S:93 Code: 47 20 4c 89 4f 28 4c 89 57 30 4c 89 5f 38 48 8d 76 40 48 8d 7f 40 ff c9 75 b6 89 d1 83 e2 07 c1 e9 03 74 12 4c 8b 06 4c 89 07 <48> 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10 89 d1 8a 06 88 07 RSP: 0018:ffffc9000137eef8 EFLAGS: 00040206 RAX: ffffffff83e2d101 RBX: 0000000000000032 RCX: 0000000000000006 RDX: 0000000000000002 RSI: ffff88801fa5c66c RDI: 00002000000002fb RBP: 0000000000000000 R08: 66666f5f7261762c R09: 1ffff11003f4b8d3 R10: dffffc0000000000 R11: ffffed1003f4b8d4 R12: 00007ffffffff000 R13: 000020000000032d R14: ffff88801fa5c66c R15: 00002000000002fb copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline] _copy_to_user+0xf0/0x130 lib/usercopy.c:40 copy_to_user include/linux/uaccess.h:200 [inline] bpf_verifier_vlog+0x1b5/0x350 kernel/bpf/verifier.c:303 verbose+0x1f0/0x2b0 kernel/bpf/verifier.c:348 print_verifier_state+0xb93/0x2130 kernel/bpf/verifier.c:696 do_check+0x4872/0xefc0 kernel/bpf/verifier.c:11263 do_check_common+0xe7f/0x16e0 kernel/bpf/verifier.c:13515 do_check_main kernel/bpf/verifier.c:13578 [inline] bpf_check+0x88c1/0xf6b0 kernel/bpf/verifier.c:14149 bpf_prog_load+0xfdf/0x14e0 kernel/bpf/syscall.c:2354 __sys_bpf+0x532/0x6f0 kernel/bpf/syscall.c:4657 __do_sys_bpf kernel/bpf/syscall.c:4761 [inline] __se_sys_bpf kernel/bpf/syscall.c:4759 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4759 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f736a073e59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f73682cd028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f736a2ecfa0 RCX: 00007f736a073e59 RDX: 000000000000002d RSI: 00002000002a0fb8 RDI: 0000000000000005 RBP: 00007f736a109e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f736a2ed038 R14: 00007f736a2ecfa0 R15: 00007ffed8286298 ---------------- Code disassembly (best guess): 0: 47 20 4c 89 4f and %r9b,0x4f(%r9,%r9,4) 5: 28 4c 89 57 sub %cl,0x57(%rcx,%rcx,4) 9: 30 4c 89 5f xor %cl,0x5f(%rcx,%rcx,4) d: 38 48 8d cmp %cl,-0x73(%rax) 10: 76 40 jbe 0x52 12: 48 8d 7f 40 lea 0x40(%rdi),%rdi 16: ff c9 dec %ecx 18: 75 b6 jne 0xffffffd0 1a: 89 d1 mov %edx,%ecx 1c: 83 e2 07 and $0x7,%edx 1f: c1 e9 03 shr $0x3,%ecx 22: 74 12 je 0x36 24: 4c 8b 06 mov (%rsi),%r8 27: 4c 89 07 mov %r8,(%rdi) * 2a: 48 8d 76 08 lea 0x8(%rsi),%rsi <-- trapping instruction 2e: 48 8d 7f 08 lea 0x8(%rdi),%rdi 32: ff c9 dec %ecx 34: 75 ee jne 0x24 36: 21 d2 and %edx,%edx 38: 74 10 je 0x4a 3a: 89 d1 mov %edx,%ecx 3c: 8a 06 mov (%rsi),%al 3e: 88 07 mov %al,(%rdi)