general protection fault, probably for non-canonical address 0xdffffc0000000070: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000380-0x0000000000000387] CPU: 1 PID: 15348 Comm: syz-executor.4 Tainted: G W 5.17.0-syzkaller-09727-g34af78c4e616 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:llc_ui_connect+0x369/0xca0 net/llc/af_llc.c:500 Code: e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 20 40 8c f9 bb 80 03 00 00 49 03 1e 48 89 d8 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df <42> 80 3c 30 00 4c 8b 6c 24 40 74 08 48 89 df e8 f3 3f 8c f9 48 8b RSP: 0018:ffffc90008c1fca0 EFLAGS: 00010202 RAX: 0000000000000070 RBX: 0000000000000380 RCX: ffff88802cf99000 RDX: 0000000000000006 RSI: ffffc90008c1fe2e RDI: ffff88802cf99720 RBP: ffffc90008c1fdd0 R08: dffffc0000000000 R09: ffffed10059f32a7 R10: ffffed10059f32a7 R11: 0000000000000000 R12: 1ffff92001183fc4 R13: dffffc0000000000 R14: dffffc0000000000 R15: ffffc90008c1fe28 FS: 00007f6c8c344700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555a2fc71600 CR3: 0000000022ee0000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __sys_connect_file net/socket.c:1900 [inline] __sys_connect+0x29b/0x2d0 net/socket.c:1917 __do_sys_connect net/socket.c:1927 [inline] __se_sys_connect net/socket.c:1924 [inline] __x64_sys_connect+0x76/0x80 net/socket.c:1924 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f6c8b289049 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6c8c344168 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007f6c8b39c030 RCX: 00007f6c8b289049 RDX: 0000000000000010 RSI: 0000000020000180 RDI: 0000000000000004 RBP: 00007f6c8b2e308d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcd69c9cbf R14: 00007f6c8c344300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:llc_ui_connect+0x369/0xca0 net/llc/af_llc.c:500 Code: e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 20 40 8c f9 bb 80 03 00 00 49 03 1e 48 89 d8 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df <42> 80 3c 30 00 4c 8b 6c 24 40 74 08 48 89 df e8 f3 3f 8c f9 48 8b RSP: 0018:ffffc90008c1fca0 EFLAGS: 00010202 RAX: 0000000000000070 RBX: 0000000000000380 RCX: ffff88802cf99000 RDX: 0000000000000006 RSI: ffffc90008c1fe2e RDI: ffff88802cf99720 RBP: ffffc90008c1fdd0 R08: dffffc0000000000 R09: ffffed10059f32a7 R10: ffffed10059f32a7 R11: 0000000000000000 R12: 1ffff92001183fc4 R13: dffffc0000000000 R14: dffffc0000000000 R15: ffffc90008c1fe28 FS: 00007f6c8c344700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555a2fc71600 CR3: 0000000022ee0000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: e8 03 42 80 3c callq 0x3c804208 5: 28 00 sub %al,(%rax) 7: 74 08 je 0x11 9: 4c 89 f7 mov %r14,%rdi c: e8 20 40 8c f9 callq 0xf98c4031 11: bb 80 03 00 00 mov $0x380,%ebx 16: 49 03 1e add (%r14),%rbx 19: 48 89 d8 mov %rbx,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 49 be 00 00 00 00 00 movabs $0xdffffc0000000000,%r14 27: fc ff df * 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction 2f: 4c 8b 6c 24 40 mov 0x40(%rsp),%r13 34: 74 08 je 0x3e 36: 48 89 df mov %rbx,%rdi 39: e8 f3 3f 8c f9 callq 0xf98c4031 3e: 48 rex.W 3f: 8b .byte 0x8b