TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 19739 Comm: syz-executor.0 Not tainted 4.14.230-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff888043ef8240 task.stack: ffff888053e98000 RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:86 [inline] RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:111 [inline] RIP: 0010:scatterwalk_copychunks+0x4a3/0x680 crypto/scatterwalk.c:55 RSP: 0018:ffff888053e9f520 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000001000 RCX: ffffc90006dbc000 RDX: 0000000000000002 RSI: ffffffff831695d4 RDI: ffff8880529ff228 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1009ef6c11 R10: ffff88804f7b608c R11: 0000000000000000 R12: 0000000000001000 R13: ffff888053e9f5d8 R14: 0000000000003000 R15: ffff8880529ff234 FS: 00007fb76c59f700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30622000 CR3: 00000000a381d000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: scatterwalk_map_and_copy crypto/scatterwalk.c:72 [inline] scatterwalk_map_and_copy+0x100/0x1a0 crypto/scatterwalk.c:60 gcmaes_encrypt.constprop.0+0x5b5/0xc00 arch/x86/crypto/aesni-intel_glue.c:778 Code: fc ff df 80 3c 02 00 0f 85 d9 01 00 00 48 8d 45 10 49 89 6d 00 48 89 c2 48 89 44 24 18 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 81 01 00 00 48 b8 00 00 00 RIP: scatterwalk_start include/crypto/scatterwalk.h:86 [inline] RSP: ffff888053e9f520 RIP: scatterwalk_pagedone include/crypto/scatterwalk.h:111 [inline] RSP: ffff888053e9f520 RIP: scatterwalk_copychunks+0x4a3/0x680 crypto/scatterwalk.c:55 RSP: ffff888053e9f520 ---[ end trace c3c060e66f789192 ]---