BUG: unable to handle page fault for address: 000000004cdf8948 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 2350d067 P4D 2350d067 PUD 0 Oops: 0002 [#1] PREEMPT SMP KASAN CPU: 0 PID: 14223 Comm: syz-executor.5 Not tainted 6.1.55-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 RIP: 0010:bpf_dispatcher_xdp+0x80b/0x1000 Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 48 81 fa a8 22 00 a0 0f 8f 63 00 <00> 00 48 81 fa 58 21 00 a0 7f 2a 48 81 fa d0 20 00 a0 7f 11 48 81 RSP: 0018:ffffc9000335f978 EFLAGS: 00010246 RAX: 000000004cdf8948 RBX: ffffc9000335fa60 RCX: 0000000000040000 RDX: ffffffffa00022e8 RSI: ffffc90002ec6048 RDI: ffffc9000335fc80 RBP: ffffc9000335fb70 R08: ffffffff88bd09e7 R09: ffffed100ee9a001 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffffc90002ec6030 R14: 0000000000000000 R15: ffffc9000335fc60 FS: 00007f9ce92326c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000004cdf8948 CR3: 000000004e518000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: bpf_prog_test_run_xdp+0x7a7/0x1130 net/bpf/test_run.c:1389 bpf_prog_test_run+0x32f/0x3a0 kernel/bpf/syscall.c:3633 __sys_bpf+0x3eb/0x6c0 kernel/bpf/syscall.c:4986 __do_sys_bpf kernel/bpf/syscall.c:5072 [inline] __se_sys_bpf kernel/bpf/syscall.c:5070 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5070 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f9ce847cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9ce92320c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f9ce859c050 RCX: 00007f9ce847cae9 RDX: 0000000000000048 RSI: 0000000020001480 RDI: 000000000000000a RBP: 00007f9ce84c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f9ce859c050 R15: 00007ffd991f4fc8 Modules linked in: CR2: 000000004cdf8948 ---[ end trace 0000000000000000 ]--- RIP: 0010:bpf_dispatcher_xdp+0x80b/0x1000 Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 48 81 fa a8 22 00 a0 0f 8f 63 00 <00> 00 48 81 fa 58 21 00 a0 7f 2a 48 81 fa d0 20 00 a0 7f 11 48 81 RSP: 0018:ffffc9000335f978 EFLAGS: 00010246 RAX: 000000004cdf8948 RBX: ffffc9000335fa60 RCX: 0000000000040000 RDX: ffffffffa00022e8 RSI: ffffc90002ec6048 RDI: ffffc9000335fc80 RBP: ffffc9000335fb70 R08: ffffffff88bd09e7 R09: ffffed100ee9a001 R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 R13: ffffc90002ec6030 R14: 0000000000000000 R15: ffffc9000335fc60 FS: 00007f9ce92326c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000004cdf8948 CR3: 000000004e518000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 ---------------- Code disassembly (best guess): 1c: 00 00 add %al,(%rax) 1e: 00 48 81 add %cl,-0x7f(%rax) 21: fa cli 22: a8 22 test $0x22,%al 24: 00 a0 0f 8f 63 00 add %ah,0x638f0f(%rax) * 2a: 00 00 add %al,(%rax) <-- trapping instruction 2c: 48 81 fa 58 21 00 a0 cmp $0xffffffffa0002158,%rdx 33: 7f 2a jg 0x5f 35: 48 81 fa d0 20 00 a0 cmp $0xffffffffa00020d0,%rdx 3c: 7f 11 jg 0x4f 3e: 48 rex.W 3f: 81 .byte 0x81