general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 5590 Comm: syz-executor.0 Not tainted 6.2.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 RIP: 0010:bpf_struct_ops_valid_to_reg kernel/bpf/bpf_struct_ops.c:762 [inline] RIP: 0010:bpf_struct_ops_link_create+0xa9/0x320 kernel/bpf/bpf_struct_ops.c:833 Code: 00 00 8b 3f e8 b8 9e ed ff 48 85 c0 48 89 c5 0f 84 2f 02 00 00 48 8d 78 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e f6 01 00 00 83 7d 18 1a 74 5e RSP: 0018:ffffc90004bc7c38 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: 1ffff92000978f88 RCX: ffffc90004bc7b18 RDX: 0000000000000001 RSI: ffffffff898ba500 RDI: 000000000000000f RBP: fffffffffffffff7 R08: 0000000000000001 R09: ffffffff8d86edd7 R10: fffffbfff1b0ddba R11: 0000000000000000 R12: 0000000000000000 R13: ffffc90004bc7de8 R14: 0000000020001340 R15: 000000000000001c FS: 00007f8bb485d700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8bb3bad988 CR3: 000000006e57a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: link_create kernel/bpf/syscall.c:4585 [inline] __sys_bpf+0x2c2e/0x3d40 kernel/bpf/syscall.c:5095 __do_sys_bpf kernel/bpf/syscall.c:5129 [inline] __se_sys_bpf kernel/bpf/syscall.c:5127 [inline] __x64_sys_bpf+0x74/0xb0 kernel/bpf/syscall.c:5127 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f8bb3a8c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8bb485d168 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f8bb3babf80 RCX: 00007f8bb3a8c0f9 RDX: 0000000000000010 RSI: 0000000020001340 RDI: 000000000000001c RBP: 00007f8bb3ae7b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc0c59fd1f R14: 00007f8bb485d300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:bpf_struct_ops_valid_to_reg kernel/bpf/bpf_struct_ops.c:762 [inline] RIP: 0010:bpf_struct_ops_link_create+0xa9/0x320 kernel/bpf/bpf_struct_ops.c:833 Code: 00 00 8b 3f e8 b8 9e ed ff 48 85 c0 48 89 c5 0f 84 2f 02 00 00 48 8d 78 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e f6 01 00 00 83 7d 18 1a 74 5e RSP: 0018:ffffc90004bc7c38 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: 1ffff92000978f88 RCX: ffffc90004bc7b18 RDX: 0000000000000001 RSI: ffffffff898ba500 RDI: 000000000000000f RBP: fffffffffffffff7 R08: 0000000000000001 R09: ffffffff8d86edd7 R10: fffffbfff1b0ddba R11: 0000000000000000 R12: 0000000000000000 R13: ffffc90004bc7de8 R14: 0000000020001340 R15: 000000000000001c FS: 00007f8bb485d700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005647e782a000 CR3: 000000006e57a000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 8b 3f mov (%rdi),%edi 4: e8 b8 9e ed ff callq 0xffed9ec1 9: 48 85 c0 test %rax,%rax c: 48 89 c5 mov %rax,%rbp f: 0f 84 2f 02 00 00 je 0x244 15: 48 8d 78 18 lea 0x18(%rax),%rdi 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 74 08 je 0x3a 32: 3c 03 cmp $0x3,%al 34: 0f 8e f6 01 00 00 jle 0x230 3a: 83 7d 18 1a cmpl $0x1a,0x18(%rbp) 3e: 74 5e je 0x9e