general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] CPU: 0 PID: 1737 Comm: syz.2.434 Not tainted 5.10.236-syzkaller-00012-gab07aeb2c93d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:bpf_overflow_handler+0x292/0x3a0 kernel/events/core.c:9841 Code: 00 74 0a 48 8b 7c 24 18 e8 8b 20 1a 00 48 8b 44 24 18 4c 8b 28 49 83 c5 20 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ef e8 60 20 1a 00 bb 70 02 00 00 49 03 5d RSP: 0018:ffffc90000d87600 EFLAGS: 00010202 RAX: 0000000000000004 RBX: 1ffff110215f5879 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000d87700 R08: ffffffff86c70008 R09: ffffffff86c70018 R10: ffffffff86c7001c R11: ffffffff86c70003 R12: 00000000eac92040 R13: 0000000000000020 R14: ffff88810afac000 R15: 1ffff920001b0ec8 FS: 00007f6d30aaa6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000003c9000 CR3: 000000010d777000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __perf_event_overflow+0x1b3/0x340 kernel/events/core.c:9065 perf_swevent_overflow kernel/events/core.c:9141 [inline] perf_swevent_event+0x2f7/0x530 kernel/events/core.c:-1 do_perf_sw_event kernel/events/core.c:9282 [inline] ___perf_sw_event+0x377/0x470 kernel/events/core.c:9313 __perf_sw_event+0x134/0x270 kernel/events/core.c:9325 perf_sw_event include/linux/perf_event.h:1179 [inline] do_user_addr_fault+0xc6a/0xc80 arch/x86/mm/fault.c:1255 handle_page_fault arch/x86/mm/fault.c:1428 [inline] exc_page_fault+0x5a/0xc0 arch/x86/mm/fault.c:1484 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:571 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x40 arch/x86/lib/copy_user_64.S:206 Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 90 90 90 90 90 90 90 0f 01 cb 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 01 ca c3 90 90 90 90 90 90 90 90 90 90 89 d1 83 f8 RSP: 0018:ffffc90000d87c20 EFLAGS: 00050206 RAX: ffffffff823a2001 RBX: 00000000000009fd RCX: 0000000000000010 RDX: 00000000000009fd RSI: 00002000003c9000 RDI: ffff88812c5b89ed RBP: ffffc90000d87c50 R08: 0000000000000005 R09: 0000000000000004 R10: ffffed10258b713f R11: 0000000000000138 R12: 00007ffffffff000 R13: 00002000003c9010 R14: ffff88812c5b8000 R15: 00002000003c8613 copy_from_user include/linux/uaccess.h:192 [inline] generic_map_update_batch+0x4a4/0x740 kernel/bpf/syscall.c:1369 bpf_map_do_batch+0x463/0x5f0 kernel/bpf/syscall.c:-1 __do_sys_bpf kernel/bpf/syscall.c:4496 [inline] __se_sys_bpf+0x55a/0x680 kernel/bpf/syscall.c:4388 __x64_sys_bpf+0x7b/0x90 kernel/bpf/syscall.c:4388 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f6d31039969 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6d30aaa038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f6d31260fa0 RCX: 00007f6d31039969 RDX: 0000000000000038 RSI: 0000200000000300 RDI: 000000000000001a RBP: 00007f6d310bbab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f6d31260fa0 R15: 00007ffff8105018 Modules linked in: ---[ end trace 81e79bfaf5593781 ]--- RIP: 0010:bpf_overflow_handler+0x292/0x3a0 kernel/events/core.c:9841 Code: 00 74 0a 48 8b 7c 24 18 e8 8b 20 1a 00 48 8b 44 24 18 4c 8b 28 49 83 c5 20 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ef e8 60 20 1a 00 bb 70 02 00 00 49 03 5d RSP: 0018:ffffc90000d87600 EFLAGS: 00010202 RAX: 0000000000000004 RBX: 1ffff110215f5879 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000d87700 R08: ffffffff86c70008 R09: ffffffff86c70018 R10: ffffffff86c7001c R11: ffffffff86c70003 R12: 00000000eac92040 R13: 0000000000000020 R14: ffff88810afac000 R15: 1ffff920001b0ec8 FS: 00007f6d30aaa6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000003c9000 CR3: 000000010d777000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 74 0a 48 add %dh,0x48(%rdx,%rcx,1) 4: 8b 7c 24 18 mov 0x18(%rsp),%edi 8: e8 8b 20 1a 00 call 0x1a2098 d: 48 8b 44 24 18 mov 0x18(%rsp),%rax 12: 4c 8b 28 mov (%rax),%r13 15: 49 83 c5 20 add $0x20,%r13 19: 4c 89 e8 mov %r13,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 ef mov %r13,%rdi 33: e8 60 20 1a 00 call 0x1a2098 38: bb 70 02 00 00 mov $0x270,%ebx 3d: 49 rex.WB 3e: 03 .byte 0x3 3f: 5d pop %rbp